discovery-api/Overview.src.html
author Rich Tibbett <richt@opera.com>
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<!DOCTYPE html>
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<!--
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  THIS IS THE WORKING VERSION OF THE CURRENT SPECIFICATION!
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  This specification is built using ReSpec.js <http://dev.w3.org/2009/dap/ReSpec.js/documentation.html>
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  From time to time it's necessary to HTML5 Tidy this document using the tool @ <http://w3c.github.com/tidy-html5/>.
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  The command used to format this document (Overview.src.html) is as follows (replacing all = signs with - signs!):
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  @> tidy ==new-blocklevel-tags section ==char-encoding utf8 ==tidy-mark no ==indent yes ==indent-spaces 2 ==indent-attributes yes ==wrap 120 ==fix-bad-comments yes -m Overview.src.html
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  To publish a new compiled version (Overview.html), we need to open this file (Overview.src.html) in any web browser.
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  Once it has loaded we press 'Ctrl + Shift + S' (or 'Cmd' + 'Shift' + 'S' on Mac) and then select
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  'Save as HTML (Source)' from the resulting menu.
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  We then replace Overview.html with the produced HTML source of this process.
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  Next we run HTML5 Tidy over our new Overview.html file with the following command (replacing all = signs with - signs!):
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  @> tidy ==new-blocklevel-tags section ==char-encoding utf8 ==tidy-mark no ==indent yes ==indent-spaces 2 ==indent-attributes yes ==wrap 120 ==hide-comments yes -m Overview.html
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  Now the specification is ready to be published :)
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-->
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<html>
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  <head>
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    <title>
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      Network Service Discovery
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    </title>
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    <meta http-equiv='Content-Type'
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          content='text/html; charset=utf-8'>
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    <script type="text/javascript"
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          class='remove'>
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var respecConfig = {
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          specStatus:   "ED",
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          //publishDate:  "2013-03-29",
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          shortName:    "discovery-api",
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          edDraftURI:   "http://dvcs.w3.org/hg/dap/raw-file/tip/discovery-api/Overview.html",
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          previousMaturity: "FPWD",
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          previousPublishDate: "2012-10-04",
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          editors: [
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            {
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              name:       "Rich Tibbett",
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              //url:        "http://richt.me/",
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              company:    "Opera Software ASA",
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              companyURL: "http://opera.com/"
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            },
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            {
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              name:       "Clarke Stevens",
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              //url:      "",
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              company:    "CableLabs",
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              companyURL: "http://cablelabs.com/"
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            }
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          ],
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          wg:           "Device APIs Working Group",
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          wgURI:        "http://www.w3.org/2009/dap/",
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          wgPublicList: "public-device-apis",
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          wgPatentURI:  "http://www.w3.org/2004/01/pp-impl/43696/status",
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//          extraCSS:     ["http://dvcs.w3.org/hg/dap/raw-file/tip/discovery-api/css/respec.nsd.css"],
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//          inlineCSS:    true,
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          noIDLIn:      true
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      };
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    </script>
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    <script src='http://www.w3.org/Tools/respec/respec-w3c-common'
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          type="text/javascript"
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          class='remove'
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          async=""></script>
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    <style>
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     /* Custom ReSpec CSS (by Rich Tibbett) */
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     /* Add better spacing to sections */
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     section, .section { margin-bottom: 2em; }
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     /* Reduce note & issue render size */
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     .note, .issue { font-size:0.8em; }
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     /* Add addition spacing to <ol> and <ul> for rule definition */
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     ol.rule li, ul.rule li { padding:0.6em; }
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     pre.widl { border: solid thin; background: #EEEEEE; color: black; padding: 0.5em 1em; position: relative; }
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     pre.widl :link, pre.widl :visited { color: #000; background: transparent; }
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     pre.widl:before { content: "IDL"; font: bold small sans-serif; padding: 0.5em; background: white; position: absolute; top: 0; margin: -1px 0 0 -4em; width: 1.5em; border: thin solid; border-radius: 0 0 0 0.5em }
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     div.example { border: solid thin black; background: #FFFFF0; color: black; padding: 0.5em 1em; position: relative; margin: 1em 0 1em 4.6em; width: auto; }
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     div.example:before { content: "EXAMPLE"; font: bold small sans-serif; padding: 0.5em; background: white; color: black; position: absolute; top: 0; margin: -1px 0 0 -7.6em; width: 5em; border: thin solid black; border-radius: 0 0 0 0.5em }
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     dl.domintro { color: green; margin: 2em 0 2em 2em; padding: 0.5em 1em; border: none; background: #DDFFDD; }
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     hr + dl.domintro, div.impl + dl.domintro { margin-top: 2.5em; margin-bottom: 1.5em; }
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     dl.domintro dt, dl.domintro dt * { color: black; text-decoration: none; }
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     dl.domintro dd { margin: 0.5em 0 1em 2em; padding: 0; }
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     dl.domintro dd p { margin: 0.5em 0; }
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     dl.domintro code {font-size: inherit; font-style: italic; }
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     dl.domintro:before { display: table; margin: -1em -0.5em 0.5em auto; width: auto; content: 'This box is non-normative. Implementation requirements are given below this box.'; color: red; border: solid 2px; background: white; padding: 0 0.25em; font-size:0.8em; }
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     table { border-collapse:collapse; border-style:hidden hidden none hidden }
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     table thead { border-bottom:solid }
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     table tbody th:first-child { border-left:solid }
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     table td, table th { border-left:solid; border-right:solid; border-bottom:solid thin; vertical-align:top; padding:0.2em }
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     </style>
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  </head>
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  <body>
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    <section id='abstract'>
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      <p>
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        This specification defines a mechanism for an HTML document to discover and subsequently communicate with
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        <abbr title="Hypertext Transfer Protocol">HTTP</abbr>-based services advertised via common discovery protocols
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        within the current network.
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      </p>
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    </section>
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    <section id='sotd'>
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      <p>
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        This document represents the early consensus of the group on the scope and features of the proposed API.
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      </p>
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    </section>
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    <section class="informative">
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      <h3>
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        Introduction
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      </h3>
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      <p>
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        To enable Web pages to connect and communicate with Local-networked Services provided over HTTP, this
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        specification introduces the <a href="#navigatornetworkservice"><code>NavigatorNetworkService</code></a>
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        interface.
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      </p>
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      <p>
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        Using this <abbr title="Application Programming Interface">API</abbr> consists of requesting a well-known
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        service type, known by developers and advertised by Local-networked Devices. User authorization, where the user
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        connects the web page to discovered services, is expected before the web page is able to interact with any
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        Local-networked Services.
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      </p>
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      <p>
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        A web page creates a request to obtain connectivity to services running in the network by specifying a
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        well-known discovery service type that it wishes to interact with.
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      </p>
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      <p>
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        The user agent, having captured all advertised services on the network from the <a>service discovery
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        mechanisms</a> included in this recommendation, attempts to match the requested service type to a discovered
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        service according to the processing described herein.
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      </p>
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      <p>
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        If a service connectivity request is successful then the Web page is provided with the necessary information to
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        communicate with the authorized Local-networked Service. If the request fails then the Web page will receive an
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        error callback containing an error code describing the cause of Local-networked Service connectivity failure.
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      </p>
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      <p>
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        Once connected to a Local-networked Service the Web page can send requests and receive responses to the
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        Local-networked Service via the messaging format and appropriate channel inferred from the service type
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        authorized via the provided API. The Web page, once connected, can also receive service-pushed events, in the
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        messaging format supported by the Local-networked Device, if such event subscription functionality is provided
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        by the connected Local-networked Service.
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      </p>
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      <p>
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        Services available within the local network can connect and disconnect at different times during the execution of a web page. The user agent can inform a web page when the state of networked services matching any of the requested valid service types change. Web pages can use this information to enable in-page experiences for communicating the state of networked services with the ability to change the particular service or set of services the page is connected to (by re-invoking the <a href=
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        "#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a> method defined herein).
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      </p>
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      <div class="example">
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        <p>
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          Example of requesting a DNS-SD advertised service:
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        </p>
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        <hr>
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        <pre class="highlight">
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function showServices( services ) {
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  // Show a list of all the services provided to the web page
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  for(var i = 0, l = services.length; i &lt; l; i++) console.log( services[i].name );
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}
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navigator.getNetworkServices('zeroconf:_boxee-jsonrpc._tcp', showServices);
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</pre>
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      </div>
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      <div class="example">
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        <p>
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          Example of requesting a UPnP advertised service, also handling error conditions:
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        </p>
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        <hr>
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        <pre class="highlight">
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function showServices( services ) {
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  // Show a list of all the services provided to the web page
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  for(var i = 0, l = services.length; i &lt; l; i++) console.log( services[i].name );
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}
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function error( e ) {
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  console.log( "Error occurred: " + e.code );
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}
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navigator.getNetworkServices('upnp:urn:schemas-upnp-org:service:ContentDirectory:1', showServices, error);
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</pre>
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      </div>
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      <div class="example">
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        <p>
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          Example of requesting either a DNS-SD or UPnP advertised service:
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        </p>
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        <hr>
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        <pre class="highlight">
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function showServices( services ) {
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  // Show a list of all the services provided to the web page (+ service type)
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  for(var i = 0, l = services.length; i &lt; l; i++)
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     console.log( services[i].name + '(' + services[i].type + ')' );
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}
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navigator.getNetworkServices([
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  'zeroconf:_boxee-jsonrpc._tcp',
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  'upnp:urn:schemas-upnp-org:service:ContentDirectory:1'
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], showServices);
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</pre>
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      </div>
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      <p>
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        For more detailed examples see the <a href="#examples">Examples</a> section.
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      </p>
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    </section>
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    <section id='conformance'>
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      <p>
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        Requirements phrased in the imperative as part of algorithms (such as "strip any leading space characters" or
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        "return false and abort these steps") are to be interpreted with the meaning of the key word ("must", "should",
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        "may", etc) used in introducing the algorithm.
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      </p>
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      <p>
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        Some conformance requirements are phrased as requirements on attributes, methods or objects. Such requirements
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        are to be interpreted as requirements on user agents.
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      </p>
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      <p>
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        Conformance requirements phrased as algorithms or specific steps MAY be implemented in any manner, so long as
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        the end result is equivalent. (In particular, the algorithms defined in this specification are intended to be
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        easy to follow, and not intended to be performant.)
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      </p>
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      <p>
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        The only conformance class defined by this specification is a <dfn>user agent</dfn>.
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      </p>
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      <p>
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        User agents MAY impose implementation-specific limits on otherwise unconstrained inputs, e.g. to prevent denial
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        of service attacks, to guard against running out of memory, or to work around platform-specific limitations.
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      </p>
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      <p>
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        When support for a feature is disabled (e.g. as an emergency measure to mitigate a security problem, or to aid
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        in development, or for performance reasons), user agents MUST act as if they had no support for the feature
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        whatsoever, and as if the feature was not mentioned in this specification. For example, if a particular feature
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        is accessed via an attribute in a Web IDL interface, the attribute itself would be omitted from the objects
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        that implement that interface - leaving the attribute on the object but making it return null or throw an
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        exception is insufficient.
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      </p>
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      <section>
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        <h3>
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          Dependencies
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        </h3>This specification relies on several other underlying specifications.
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        <dl>
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          <dt>
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            HTML
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          </dt>
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          <dd>
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            Many fundamental concepts from HTML are used by this specification. [[!HTML5]]
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          </dd>
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          <dt>
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            WebIDL
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          </dt>
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          <dd>
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            The IDL blocks in this specification use the semantics of the WebIDL specification. [[!WEBIDL]]
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          </dd>
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        </dl>
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      </section>
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    </section>
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    <section>
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      <h3>
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        Terminology
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      </h3>
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      <p>
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        The construction "a <code>Foo</code> object", where <code>Foo</code> is actually an interface, is sometimes
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        used instead of the more accurate "an object implementing the interface <code>Foo</code>".
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      </p>
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      <p>
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        The term DOM is used to refer to the API set made available to scripts in Web applications, and does not
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        necessarily imply the existence of an actual <code>Document</code> object or of any other <code>Node</code>
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        objects as defined in the DOM Core specifications. [[!DOM4]]
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      </p>
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      <p>
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        An IDL attribute is said to be <em>getting</em> when its value is being retrieved (e.g. by author script), and
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        is said to be <em>setting</em> when a new value is assigned to it.
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      </p>
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      <p>
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        A <dfn>valid service type</dfn> is any of the following:
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      </p>
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      <ul>
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        <li>a string that begins with <code>upnp:</code> or <code>zeroconf:</code> followed by one or more characters
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        in the ranges U+0021, U+0023 to U+0027, U+002A to U+002B, U+002D to U+002E, U+0030 to U+0039, U+0041 to U+005A,
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        U+005E to U+007E.
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        </li>
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        <li>a string that begins with <code>dial:</code> followed by an integer version.
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        </li>
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      </ul>
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      <p>
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        A <a>valid service type</a> provided in the <code>type</code> attribute of the <a href=
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        "#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a> method will be matched against the
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        services currently contained in the <a>list of available service records</a> according to the algorithms
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        defined in this specification.
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      </p>
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      <p>
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        A <dfn>user-agent generated callback url</dfn> is a Local-network accessible URL endpoint that a <a>user
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        agent</a> generates and maintains for receiving HTTP NOTIFY requests from UPnP Event sources. It is only
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        required when the user agent implements UPnP Service Discovery as defined in this specification.
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      </p>
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      <p>
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        In this specification we use the following terms to describe the processes required for Local-networked
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        Services management:
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      </p>
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      <ul>
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        <li>A <dfn>new service</dfn> is a Local-networked Service that has not previously been discovered or registered
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        in the <a>list of available service records</a>.
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        </li>
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        <li>An <dfn>existing service</dfn> is a Local-networked Service that has previously been discovered and is
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        registered in the <a>list of available service records</a>.
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        </li>
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        <li>A <dfn>current service</dfn> is a Local-networked Service, represented by a <a href=
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        "#networkservice"><code>NetworkService</code></a> object, that is currently being shared with a web page via a
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        <a href="#networkservices"><code>NetworkServices</code></a> object registered in the <a>list of active service
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        managers</a>.
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        </li>
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      </ul>
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    </section>
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    <section>
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      <h2>
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        Requesting networked services
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      </h2>
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      <pre class="widl">
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[Supplemental, NoInterfaceObject]
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interface <dfn id="navigatornetworkservice">NavigatorNetworkService</dfn> {
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  // Obtain a Local-networked Service
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  void <a href="#dom-navigator-getnetworkservices">getNetworkServices</a>( in any type,
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                           in <a href=
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"#navigatornetworkservicesuccesscallback">NavigatorNetworkServiceSuccessCallback</a> successCallback,
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                           in optional <a href=
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"#navigatornetworkserviceerrorcallback">NavigatorNetworkServiceErrorCallback</a> errorCallback );
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};
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<a class="externalDFN"
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     href=
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     "http://www.whatwg.org/specs/web-apps/current-work/complete/timers.html#navigator">Navigator</a> implements <a href=
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     "#navigatornetworkservice">NavigatorNetworkService</a>;
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[Callback=FunctionOnly, NoInterfaceObject]
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interface <dfn id="navigatornetworkservicesuccesscallback">NavigatorNetworkServiceSuccessCallback</dfn> {
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  void handleEvent( in <a href="#networkservices">NetworkServices</a> services );
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};
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[NoInterfaceObject]
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interface <dfn id="navigatornetworkserviceerror">NavigatorNetworkServiceError</dfn> {
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  const unsigned short <a href="#dom-navigatornetworkserviceerror-permission_denied">PERMISSION_DENIED_ERR</a> = 1;
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  const unsigned short <a href="#dom-navigatornetworkserviceerror-unknown_type_prefix">UNKNOWN_TYPE_PREFIX_ERR</a> = 2;
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  readonly attribute unsigned short <a href="#dom-navigatornetworkserviceerror-code">code</a>;
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};
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[Callback=FunctionOnly, NoInterfaceObject]
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interface <dfn id="navigatornetworkserviceerrorcallback">NavigatorNetworkServiceErrorCallback</dfn> {
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  void handleEvent( in <a href="#navigatornetworkserviceerror">NavigatorNetworkServiceError</a> error );
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};
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</pre>
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      <section>
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        <h2>
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          Methods
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        </h2>
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        <dl class="domintro">
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          <dt>
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            <var title="">window</var> . <code title="dom-navigator"><a href=
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            "http://www.whatwg.org/specs/web-apps/current-work/complete/timers.html#navigator">navigator</a></code> .
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            <code title="dom-navigator-getNetworkServices"><a href=
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            "#dom-navigator-getnetworkservices">getNetworkServices</a></code> ( <var title="">type</var> , <var title=
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            "">successCallback</var> [, <var title="">errorCallback</var> ] )
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          </dt>
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          <dd>
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            <p>
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              Prompts the user to select discovered network services that have advertised support for the requested
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              service type.
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            </p>
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            <p>
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              The <var title="">type</var> argument contains one or more <a>valid service type</a> tokens that the web
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              page would like to interact with.
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            </p>
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            <p>
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              If the user accepts, the <var title="">successCallback</var> is invoked, with zero or more <a href=
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              "#networkservice"><code>NetworkService</code></a> objects as its argument.
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            </p>
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            <p>
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              If the user declines, the <var title="">errorCallback</var> (if any) is invoked.
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            </p>
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          </dd>
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        </dl>
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        <div>
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          <p>
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            When the <dfn id="dom-navigator-getnetworkservices"
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               title="dom-navigator-getnetworkservices"><code>getNetworkServices(type, successCallback[,
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               errorCallback])</code></dfn> method is called, the <a>user agent</a> MUST run the following steps:
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          </p>
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          <ol class="rule">
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            <li>Let <var>requested control types</var> be initially set to an empty array.
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            </li>
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            <li>If <var>type</var> is an array consisting of one or more <a>valid service type</a> tokens, then let
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            <var>requested control types</var> by the value of <var>type</var>, removing any non-<a>valid service
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            type</a> tokens from the resulting array.
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            </li>
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            <li>If <var>type</var> is a string consisting of one <a>valid service type</a> token, then let
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            <var>requested control types</var> be an array containing one item with a value of <var>type</var>.
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            </li>
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            <li>If <var>requested control types</var> is an array that contains at least one or more <a title=
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            "valid service type">valid service type</a> tokens then continue to the step labeled <em>process</em>
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            below. Otherwise, the <a>user agent</a> MUST <a href=
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            "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
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                  class="externalDFN">queue a task</a> to invoke <var>errorCallback</var>, if it is provided and is an
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                  object of type <code>Function</code>, with a new <a href=
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                  "#navigatornetworkserviceerror"><code>NavigatorNetworkServiceError</code></a> object whose <a href=
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                  "#dom-navigatornetworkserviceerror-code"><code>code</code></a> attribute has the numeric value 2
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                  (<a href=
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                  "#dom-navigatornetworkserviceerror-unknown_type_prefix"><code>UNKNOWN_TYPE_PREFIX_ERR</code></a>) as
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                  its argument, abort any remaining steps and return.
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            </li>
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            <li>
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              <em>Process</em>: Let <var>services found</var> be an empty array.
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            </li>
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            <li>For each <var>available service</var> in the <a>list of available service records</a> run the following
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            steps:
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              <ol class="rule">
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                <li>For each <var>requested control type</var> in <var>requested control types</var>: If <var>available
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                service</var>'s <code>type</code> attribute equals the <var>requested control type</var> then let <var>
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                  matched service</var> equal the value of <var>available service</var> and continue at the step
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                  labeled <var>attach</var> below.
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                </li>
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                <li>Continue at the next <var>available service</var>.
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                </li>
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                <li>
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                  <em>Attach</em>: If <var>matched service</var> is not empty then run the following steps:
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                  <ol class="rule">
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                    <li>Let <var>new service object</var> be a new <a href=
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                    "#networkservice"><code>NetworkService</code></a> object, mapping the parameters of <var>matched
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                    service</var> to this new object where possible.
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                    </li>
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                    <li>Append <var>new service object</var> to the <var>services found</var> array.
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                    </li>
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                  </ol>
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                </li>
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              </ol>
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            </li>
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            <li>Return, and run the remaining steps asynchronously.
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            </li>
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            <li>Optionally, e.g. based on a previously-established user preference, for security reasons, or due to
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            platform limitations, the <a>user agent</a> MAY <a href=
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            "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
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                  class="externalDFN">queue a task</a> to invoke <var>errorCallback</var>, if it is provided and is an
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                  object of type <code>Function</code>, with a new <a href=
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                  "#navigatornetworkserviceerror"><code>NavigatorNetworkServiceError</code></a> object whose <a href=
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                  "#dom-navigatornetworkserviceerror-code"><code>code</code></a> attribute has the numeric value 1
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                  (<a href=
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                  "#dom-navigatornetworkserviceerror-permission_denied"><code>PERMISSION_DENIED_ERR</code></a>) as its
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                  argument, abort any remaining steps and return.
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            </li>
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            <li>The user agent MUST NOT provide the entry script's origin with a <a href=
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            "#networkservices"><code>NetworkServices</code></a> object without prior permission given by the user.
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              <p>
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                If <var>services found</var> is not an empty array then the <a>user agent</a> MAY choose to prompt the
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                user in a user-agent-specific manner for permission to provide the <a href=
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                "http://www.whatwg.org/specs/web-apps/current-work/complete/browsers.html#entry-script"
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                   class="externalDFN">entry script</a>'s <a href=
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                   "http://www.whatwg.org/specs/web-apps/current-work/complete/origin-0.html#origin"
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                   class="externalDFN">origin</a> with a <a href="#networkservices"><code>NetworkServices</code></a>
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                   object representing the <a>user-authorized</a> subset of <var>services found</var>.
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              </p>
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              <p>
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                Alternatively, the user agent MAY choose to queue a task to invoke <var>successCallback</var> or
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                <var>errorCallback</var> immediately based on a previously-established user previously, for security
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                reasons, or due to platform limitations. In such an implementation, if <var>successCallback</var> is to
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                be fired as a result of a previously-established user preference then the <a>user agent</a> MUST
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                continue at the next step of this algorithm.
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              </p>
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              <p>
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                If permission has been granted by the user to access one or more networked services then the <a>user
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                agent</a> SHOULD include an "ongoing local-network communication" indicator.
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              </p>
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              <p>
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                If permission has been denied by the user, <a>user agent</a> or platform, then the <a>user agent</a>
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                MUST <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
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                   class="externalDFN">queue a task</a> to invoke <var>errorCallback</var>, if it is provided and is an
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                   object of type <code>Function</code>, with a new <a href=
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                   "#navigatornetworkserviceerror"><code>NavigatorNetworkServiceError</code></a> object whose <a href=
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                   "#dom-navigatornetworkserviceerror-code"><code>code</code></a> attribute has the numeric value 1
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                   (<a href=
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                   "#dom-navigatornetworkserviceerror-permission_denied"><code>PERMISSION_DENIED_ERR</code></a>) as its
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                   argument, abort any remaining steps and return.
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              </p>
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              <p>
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                If the user never responds or no previously-established user preference has been met, this algorithm
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                stalls on this step.
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   489
              </p>
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            </li>
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   491
            <li>Let <var>services</var> be an empty array.
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            </li>
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   493
            <li>If <var>services found</var> is not an empty array then set <var>services</var> to be an array of one
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   494
            or more <a href="#networkservice"><code>NetworkService</code></a> objects for which the user granted
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   495
            permission above - known as the current objects <dfn>user-authorized</dfn> services.
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   496
            </li>
377
a311e7fe116c Add removal of entry script origin's URL whitelist urls during the getNetworkServices() algorithm.
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   497
            <li>Remove all previously whitelisted urls from the <a>entry script origin's URL whitelist</a> granted in
a311e7fe116c Add removal of entry script origin's URL whitelist urls during the getNetworkServices() algorithm.
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   498
            the current <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/browsers.html#entry-script"
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   499
                  class="externalDFN">entry script</a>'s <a href=
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   500
                  "http://www.whatwg.org/specs/web-apps/current-work/complete/origin-0.html#origin"
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   501
                  class="externalDFN">origin</a>.
a311e7fe116c Add removal of entry script origin's URL whitelist urls during the getNetworkServices() algorithm.
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diff changeset
   502
            </li>
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   503
            <li>For each Object <var>service</var> in <var>services</var>, if any, run the following sub-steps:
239
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   504
              <ol class="rule">
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   505
                <li>Add the <var>service</var>'s <code>url</code> parameter to the <a>entry script origin's
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   506
                  <abbr title="Uniform Resource Locator">URL</abbr> whitelist</a>.
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diff changeset
   507
                </li>
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   508
                <li>If <var>service</var>'s <code>type</code> parameter begins with the DOMString "<code>upnp:</code>"
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   509
                and the <var>service</var>'s <code>eventsUrl</code> parameter is not empty then <a>setup a UPnP Events
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   510
                Subscription</a> for <var>service</var>.
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diff changeset
   511
                </li>
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   512
              </ol>
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   513
            </li>
239
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   514
            <li>Let <var>services manager</var> be a new <a href="#networkservices"><code>NetworkServices</code></a>
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   515
            object.
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   516
            </li>
375
f290bbd84426 Increment/decrement servicesAvailable in rules for 'adding an available service' and 'removing an available service' based on the original requested control types provided in the original getNetworkServices() call (from: http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html)
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   517
            <li>Store <var>requested control types</var> against <var>services manager</var> as an internal variable.
f290bbd84426 Increment/decrement servicesAvailable in rules for 'adding an available service' and 'removing an available service' based on the original requested control types provided in the original getNetworkServices() call (from: http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html)
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diff changeset
   518
            </li>
239
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   519
            <li>Set <var>services manager</var>'s <a href=
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   520
            "#dom-networkservices-servicesavailable"><code>servicesAvailable</code></a> attribute to the number of
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   521
            items currently found in the <a>list of available service records</a> whose <code>type</code> property
239
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   522
            matches any of the tokens requested in <var>requested control types</var>.
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   523
            </li>
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   524
            <li>Add <var>services</var>, if any, to the <var>services manager</var> object as its collection of
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   525
            <a>indexed properties</a>. If <var>services</var> is an empty array then the <var>services manager</var>
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   526
            does not have any <var>indexed properties</var>.
250
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   527
            </li>
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   528
            <li>Set <var>services manager</var>'s <a href="#dom-networkservices-length"><code>length</code></a>
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   529
            attribute to the number of items in <var>services</var>.
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   530
            </li>
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   531
            <li>Add <var>services manager</var> to the <a>list of active service managers</a>.
239
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   532
            </li>
240
4bb39c70f008 Minor editorial updates
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diff changeset
   533
            <li>The <a>user agent</a> MUST <a href=
239
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diff changeset
   534
            "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
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   535
                  class="externalDFN">queue a task</a> to invoke <var>successCallback</var> with <var>services
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diff changeset
   536
                  manager</var> as its argument.
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diff changeset
   537
            </li>
180
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   538
          </ol>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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   539
          <p>
239
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   540
            The <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#task-source"
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   541
               class="externalDFN">task source</a> for these <a href=
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diff changeset
   542
               "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#concept-task"
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   543
               class="externalDFN">tasks</a> is the <a href=
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diff changeset
   544
               "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#user-interaction-task-source"
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diff changeset
   545
               class="externalDFN">user interaction task source</a>.
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diff changeset
   546
          </p>
180
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   547
          <p>
239
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diff changeset
   548
            When a <a href="#networkservice"><code>NetworkService</code></a> object is provided to a Web page, the
250
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diff changeset
   549
            <a>user agent</a> MUST add the <code>url</code> property to the <dfn>entry script origin's URL
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diff changeset
   550
            whitelist</dfn>. This list enables the Web page to override and initiate cross-site resource requests
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   551
            towards these URLs, and any sub-resources of these URLs, within the current <a href=
239
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diff changeset
   552
            "http://www.whatwg.org/specs/web-apps/current-work/complete/browsers.html#entry-script"
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diff changeset
   553
               class="externalDFN">entry script</a>'s <a href=
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diff changeset
   554
               "http://www.whatwg.org/specs/web-apps/current-work/complete/origin-0.html#origin"
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diff changeset
   555
               class="externalDFN">origin</a> via various existing mechanisms (e.g. Web Sockets, Server-Sent Events,
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diff changeset
   556
               Web Messaging, XMLHttpRequest).
180
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parents:
diff changeset
   557
          </p>
239
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diff changeset
   558
          <p>
371
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diff changeset
   559
            If the user navigates away from the <a href=
8b03e17da083 Rewrite Step 9 of getNetworkService algorithm following feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Sep/0141.html
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diff changeset
   560
            "http://www.whatwg.org/specs/web-apps/current-work/complete/browsers.html#entry-script"
8b03e17da083 Rewrite Step 9 of getNetworkService algorithm following feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Sep/0141.html
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diff changeset
   561
               class="externalDFN">entry script</a>'s <a href=
8b03e17da083 Rewrite Step 9 of getNetworkService algorithm following feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Sep/0141.html
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diff changeset
   562
               "http://www.whatwg.org/specs/web-apps/current-work/complete/origin-0.html#origin"
8b03e17da083 Rewrite Step 9 of getNetworkService algorithm following feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Sep/0141.html
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parents: 332
diff changeset
   563
               class="externalDFN">origin</a> then the <a>user agent</a> <em class="ct">MUST</em> remove all previously
8b03e17da083 Rewrite Step 9 of getNetworkService algorithm following feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Sep/0141.html
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diff changeset
   564
               whitelisted urls from the <a>entry script origin's URL whitelist</a>. There is no persistence to network
8b03e17da083 Rewrite Step 9 of getNetworkService algorithm following feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Sep/0141.html
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diff changeset
   565
               service selections provided to a web page. It is not possible to access a previously white-listed
8b03e17da083 Rewrite Step 9 of getNetworkService algorithm following feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Sep/0141.html
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diff changeset
   566
               networked service without the necessary user authorization in all of the following cases:
239
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diff changeset
   567
          </p>
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diff changeset
   568
          <ul>
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diff changeset
   569
            <li>If the current script is reloaded at any point in the same or different window.
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parents: 238
diff changeset
   570
            </li>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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diff changeset
   571
            <li>if the current script reinvokes the <a href=
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diff changeset
   572
            "#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a> method at any point in its
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diff changeset
   573
            execution.
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diff changeset
   574
            </li>
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diff changeset
   575
            <li>If the user navigates forward or back in their history to reload the current page.
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diff changeset
   576
            </li>
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diff changeset
   577
            <li>If a script is running in a different origin.
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diff changeset
   578
            </li>
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diff changeset
   579
          </ul>
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diff changeset
   580
        </div>
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   581
      </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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   582
      <section>
239
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diff changeset
   583
        <h3>
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diff changeset
   584
          Error Handling
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   585
        </h3>
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diff changeset
   586
        <dl class="domintro">
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diff changeset
   587
          <dt>
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diff changeset
   588
            <var title="">error</var> . <code title="dom-NavigatorNetworkServiceError-code"><a href=
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   589
            "#dom-navigatornetworkserviceerror-code">code</a></code>
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diff changeset
   590
          </dt>
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diff changeset
   591
          <dd>
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   592
            <p>
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   593
              Returns the current error's error code. At the current time, this will be <code>1</code> or
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   594
              <code>2</code>, for which the corresponding error constants <a href=
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diff changeset
   595
              "#dom-navigatornetworkserviceerror-permission_denied"><code>PERMISSION_DENIED_ERR</code></a> and <a href=
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diff changeset
   596
              "#dom-navigatornetworkserviceerror-unknown_type_prefix"><code>UNKNOWN_TYPE_PREFIX_ERR</code></a> are
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diff changeset
   597
              defined.
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diff changeset
   598
            </p>
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diff changeset
   599
          </dd>
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diff changeset
   600
        </dl>
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   601
        <p>
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   602
          The <dfn id="dom-navigatornetworkserviceerror-code"
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             title="dom-navigatornetworkserviceerror-code"><code>code</code></dfn> attribute of a <a href=
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   604
             "#navigatornetworkserviceerror"><code>NavigatorNetworkServiceError</code></a> object <em class=
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   605
             "ct">MUST</em> return the code for the error, which will be one of the following:
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   606
        </p>
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   607
        <dl>
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   608
          <dt>
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   609
            <dfn id="dom-navigatornetworkserviceerror-permission_denied"
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   610
                title="dom-navigatornetworkserviceerror-permission_denied"><code>PERMISSION_DENIED_ERR</code></dfn>
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   611
                (numeric value 1)
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   612
          </dt>
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   613
          <dd>
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   614
            The user or user agent denied the page permission to access any services.
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   615
          </dd>
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   616
          <dt>
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   617
            <dfn id="dom-navigatornetworkserviceerror-unknown_type_prefix"
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   618
                title="dom-navigatornetworkserviceerror-unknown_type_prefix"><code>UNKNOWN_TYPE_PREFIX_ERR</code></dfn>
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                (numeric value 2)
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   620
          </dt>
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   621
          <dd>
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   622
            No <a>valid service type</a> tokens were provided in the method invocation.
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   623
          </dd>
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   624
        </dl>
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   625
      </section>
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   626
    </section>
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   627
    <section>
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   628
      <h2>
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   629
        Obtaining networked services
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   630
      </h2>
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   631
      <p>
371
8b03e17da083 Rewrite Step 9 of getNetworkService algorithm following feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Sep/0141.html
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   632
        The <a href="#networkservices"><code>NetworkServices</code></a> interface represents a collection of zero or
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   633
        more <dfn>indexed properties</dfn> that are each a <a>user-authorized</a> <a href=
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   634
        "#networkservice"><code>NetworkService</code></a> object.
254
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   635
      </p>
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diff changeset
   636
      <p>
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   637
        A <a href="#networkservices"><code>NetworkServices</code></a> object is the top level success callback
371
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   638
        parameter from a call to <a href="#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a>.
180
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   639
      </p>
239
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   640
      <pre class="widl">
180
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   641
[NoInterfaceObject]
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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   642
interface <dfn id="networkservices">NetworkServices</dfn> {
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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   643
  readonly attribute unsigned long    <a href="#dom-networkservices-length">length</a>;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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   644
  getter <a href="#networkservice">NetworkService</a> (unsigned long index);
239
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   645
  <a href="#networkservice">NetworkService</a>? <a href=
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   646
"#dom-networkservices-getservicebyid">getServiceById</a>(DOMString id);
180
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   647
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diff changeset
   648
  readonly attribute unsigned long    <a href="#dom-networkservices-servicesavailable">servicesAvailable</a>;
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diff changeset
   649
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   650
  // event handler attributes
239
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   651
           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler"
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   652
     class="externalDFN">EventHandler</a>     <a href="#dom-networkservices-onserviceavailable">onserviceavailable</a>;
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   653
           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler"
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   654
     class="externalDFN">EventHandler</a>     <a href=
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   655
     "#dom-networkservices-onserviceunavailable">onserviceunavailable</a>;
180
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diff changeset
   656
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   657
};
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diff changeset
   658
239
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   659
<a href="#networkservices">NetworkServices</a> implements <a href=
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   660
"http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#interface-eventtarget"
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   661
     class="externalDFN">EventTarget</a>;
180
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diff changeset
   662
</pre>
397
7d43f1efc56f Move informative text introducing NSD events to Introduction section
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diff changeset
   663
180
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   664
      <section>
239
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   665
        <h2>
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   666
          Attributes
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   667
        </h2>
180
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diff changeset
   668
        <dl class="domintro">
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diff changeset
   669
          <dt>
239
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   670
            <code title="dom-networkservices-length"><a href="#dom-networkservices-length">length</a></code>
180
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   671
          </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   672
          <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   673
            <p>
398
19eb703af1c9 Minor editorial changes to NSD spec
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diff changeset
   674
              Returns the current number of <a>indexed properties</a> in the current object's collection.
180
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diff changeset
   675
            </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   676
          </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   677
          <dt>
239
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diff changeset
   678
            <code title="dom-networkservices-servicesavailable"><a href=
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diff changeset
   679
            "#dom-networkservices-servicesavailable">servicesAvailable</a></code>
180
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diff changeset
   680
          </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   681
          <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   682
            <p>
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
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diff changeset
   683
              Returns the current number of items matching one of the app-requested <a>valid service type</a> tokens in
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
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diff changeset
   684
              the <a>list of available service records</a>.
180
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   685
            </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   686
          </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   687
        </dl>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   688
        <div>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   689
          <p>
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
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diff changeset
   690
            The <dfn id="dom-networkservices-length"><code>length</code></dfn> attribute MUST return the number of
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
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   691
            <a href="#networkservice"><code>NetworkService</code></a> objects represented by the collection.
180
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   692
          </p>
239
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diff changeset
   693
          <p>
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
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diff changeset
   694
            The <dfn id="dom-networkservices-servicesavailable"><code>servicesAvailable</code></dfn> attribute MUST
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
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diff changeset
   695
            return the number of services in the <a>list of available service records</a> whose <code>type</code>
398
19eb703af1c9 Minor editorial changes to NSD spec
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parents: 397
diff changeset
   696
            attribute matches any of the <a>valid service type</a> tokens that were initially used to create the current
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
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diff changeset
   697
            <a href="#networkservices"><code>NetworkServices</code></a> object.
239
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diff changeset
   698
          </p>
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diff changeset
   699
        </div>
180
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   700
      </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   701
      <section>
239
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diff changeset
   702
        <h2>
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diff changeset
   703
          Methods
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diff changeset
   704
        </h2>
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diff changeset
   705
        <dl class="domintro">
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diff changeset
   706
          <dt>
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diff changeset
   707
            <code title="networkservices-getter"><a href="#networkservices">services</a></code> [ <var title=
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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diff changeset
   708
            "">index</var> ]
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   709
          </dt>
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diff changeset
   710
          <dd>
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diff changeset
   711
            <p>
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diff changeset
   712
              Returns the specified <a href="#networkservice"><code>NetworkService</code></a> object.
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parents: 238
diff changeset
   713
            </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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diff changeset
   714
          </dd>
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diff changeset
   715
          <dt>
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diff changeset
   716
            <code title="networkservices-getter"><a href="#networkservices">services</a></code> . <code title=
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diff changeset
   717
            "dom-networkservices-getservicebyid"><a href=
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diff changeset
   718
            "#dom-networkservices-getservicebyid">getServiceById</a></code> ( <var title="">id</var> )
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diff changeset
   719
          </dt>
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parents: 238
diff changeset
   720
          <dd>
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diff changeset
   721
            <p>
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diff changeset
   722
              Returns the <a href="#networkservice"><code>NetworkService</code></a> object with the given identifier,
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diff changeset
   723
              or null if no service has that identifier.
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diff changeset
   724
            </p>
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diff changeset
   725
          </dd>
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parents: 238
diff changeset
   726
        </dl>
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diff changeset
   727
        <p>
371
8b03e17da083 Rewrite Step 9 of getNetworkService algorithm following feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Sep/0141.html
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parents: 332
diff changeset
   728
          A <a href="#networkservices"><code>NetworkServices</code></a> object represents the current collection of
8b03e17da083 Rewrite Step 9 of getNetworkService algorithm following feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Sep/0141.html
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parents: 332
diff changeset
   729
          zero or more <a href="#networkservice"><code>NetworkService</code></a> objects - its <a>indexed
388
f6ad389be556 Update immutability defintion to clarify that only indexed properties of a NetworkServices object are immutable.
Rich Tibbett <richt@opera.com>
parents: 387
diff changeset
   730
          properties</a>. The <a>indexed properties</a> of a <a href=
f6ad389be556 Update immutability defintion to clarify that only indexed properties of a NetworkServices object are immutable.
Rich Tibbett <richt@opera.com>
parents: 387
diff changeset
   731
          "#networkservices"><code>NetworkServices</code></a> object are <span>immutable</span> meaning that <a>indexed
f6ad389be556 Update immutability defintion to clarify that only indexed properties of a NetworkServices object are immutable.
Rich Tibbett <richt@opera.com>
parents: 387
diff changeset
   732
          properties</a> cannot be added and <a>indexed properties</a> cannot be removed for the lifetime of a <a href=
f6ad389be556 Update immutability defintion to clarify that only indexed properties of a NetworkServices object are immutable.
Rich Tibbett <richt@opera.com>
parents: 387
diff changeset
   733
          "#networkservices"><code>NetworkServices</code></a> object.
239
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diff changeset
   734
        </p>
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diff changeset
   735
        <p>
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diff changeset
   736
          The <a href=
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diff changeset
   737
          "http://www.whatwg.org/specs/web-apps/current-work/multipage/infrastructure.html#supported-property-indices"
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diff changeset
   738
             class="externalDFN">supported property indices</a> of <a href=
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diff changeset
   739
             "#networkservices"><code>NetworkServices</code></a> objects at any instant are the numbers from zero to
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
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diff changeset
   740
             the number of the <a href="#networkservice"><code>NetworkService</code></a> objects in the collection
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
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diff changeset
   741
             minus one.
239
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diff changeset
   742
        </p>
398
19eb703af1c9 Minor editorial changes to NSD spec
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parents: 397
diff changeset
   743
        <p class="note">
19eb703af1c9 Minor editorial changes to NSD spec
Rich Tibbett <richt@opera.com>
parents: 397
diff changeset
   744
          Each service in a <a href="#networkservices"><code>NetworkServices</code></a> object thus has an index; the
19eb703af1c9 Minor editorial changes to NSD spec
Rich Tibbett <richt@opera.com>
parents: 397
diff changeset
   745
          first has the index 0, and each subsequent service is numbered one higher than the previous one.
19eb703af1c9 Minor editorial changes to NSD spec
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parents: 397
diff changeset
   746
        </p>
239
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diff changeset
   747
        <p>
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diff changeset
   748
          To <a href=
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   749
          "http://www.whatwg.org/specs/web-apps/current-work/multipage/infrastructure.html#determine-the-value-of-an-indexed-property"
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parents: 238
diff changeset
   750
             class="externalDFN">determine the value of an indexed property</a> for a given index <var>index</var> in a
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
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parents: 243
diff changeset
   751
             <a href="#networkservices"><code>NetworkServices</code></a> object the user agent MUST return the <a href=
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
   752
             "#networkservice"><code>NetworkService</code></a> object that represents the <var>index</var>th item in
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
   753
             the collection.
239
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diff changeset
   754
        </p>
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parents: 238
diff changeset
   755
        <p>
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parents: 238
diff changeset
   756
          The <dfn id="dom-networkservices-getservicebyid"><code>getServiceById(id)</code></dfn> method <em class=
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   757
          "ct">MUST</em> return the first <a href="#networkservice"><code>NetworkService</code></a> object in the
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
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parents: 243
diff changeset
   758
          collection whose <a href="#dom-networkservice-id"><code>id</code></a> attribute is equal to the value of the
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
   759
          <var>id</var> argument provided. When no <a href="#networkservice"><code>NetworkService</code></a> objects
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
   760
          match the given argument, the method MUST return null.
239
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diff changeset
   761
        </p>
180
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   762
      </section>
239
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diff changeset
   763
      <section>
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parents: 238
diff changeset
   764
        <h2>
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parents: 238
diff changeset
   765
          Events
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parents: 238
diff changeset
   766
        </h2>
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parents: 238
diff changeset
   767
        <p>
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diff changeset
   768
          The following are the event handlers (and their corresponding event handler event types) that <em class=
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   769
          "ct">MUST</em> be supported, as IDL attributes, by all objects implementing the <a href=
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parents: 238
diff changeset
   770
          "#networkservices"><code>NetworkServices</code></a> interface:
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   771
        </p>
243
220f3226b2a1 Apply pub rules to proposed Working Draft update
Rich Tibbett <richt@opera.com>
parents: 241
diff changeset
   772
        <table border="1">
239
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parents: 238
diff changeset
   773
          <thead>
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parents: 238
diff changeset
   774
            <tr>
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diff changeset
   775
              <th>
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diff changeset
   776
                <span title="event handlers">Event handler</span>
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parents: 238
diff changeset
   777
              </th>
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parents: 238
diff changeset
   778
              <th>
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diff changeset
   779
                <span>Event handler event type</span>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   780
              </th>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   781
            </tr>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   782
          </thead>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   783
          <tbody>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   784
            <tr>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   785
              <td>
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parents: 238
diff changeset
   786
                <dfn id="dom-networkservices-onserviceavailable"
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   787
                    title="dom-NetworkServices-onserviceavailable"><code>onserviceavailable</code></dfn>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   788
              </td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   789
              <td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   790
                <a href="#event-serviceavailable"><code>serviceavailable</code></a>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   791
              </td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   792
            </tr>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   793
            <tr>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   794
              <td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   795
                <dfn id="dom-networkservices-onserviceunavailable"
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   796
                    title="dom-NetworkServices-onserviceunavailable"><code>onserviceunavailable</code></dfn>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   797
              </td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   798
              <td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   799
                <a href="#event-serviceunavailable"><code>serviceunavailable</code></a>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   800
              </td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   801
            </tr>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   802
          </tbody>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   803
        </table>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   804
      </section>
180
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   805
    </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   806
    <section>
239
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parents: 238
diff changeset
   807
      <h2>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   808
        Communicating with a networked service
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   809
      </h2>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   810
      <p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   811
        The <a href="#networkservice"><code>NetworkService</code></a> interface is used to provide a set of connection
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   812
        information for an HTTP service endpoint and if available, service events, running on a networked device.
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   813
      </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   814
      <pre class="widl">
180
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   815
[NoInterfaceObject]
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   816
interface <dfn id="networkservice">NetworkService</dfn> {
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   817
  readonly attribute DOMString        <a href="#dom-networkservice-id">id</a>;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   818
  readonly attribute DOMString        <a href="#dom-networkservice-name">name</a>;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   819
  readonly attribute DOMString        <a href="#dom-networkservice-type">type</a>;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   820
  readonly attribute DOMString        <a href="#dom-networkservice-url">url</a>;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   821
  readonly attribute DOMString        <a href="#dom-networkservice-config">config</a>;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   822
191
5e0da09685f7 Discovery API updates following feedback from http://lists.w3.org/Archives/Public/public-device-apis/2012Aug/0016.html
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parents: 180
diff changeset
   823
  readonly attribute boolean          <a href="#dom-networkservice-online">online</a>;
180
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   824
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   825
  // event handler attributes
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   826
           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler"
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   827
     class="externalDFN">EventHandler</a>     <a href="#dom-networkservice-onserviceonline">onserviceonline</a>;
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   828
           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler"
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   829
     class="externalDFN">EventHandler</a>     <a href="#dom-networkservice-onserviceoffline">onserviceoffline</a>;
191
5e0da09685f7 Discovery API updates following feedback from http://lists.w3.org/Archives/Public/public-device-apis/2012Aug/0016.html
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parents: 180
diff changeset
   830
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   831
           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler"
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   832
     class="externalDFN">EventHandler</a>     <a href="#dom-networkservice-onnotify">onnotify</a>;
180
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   833
};
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   834
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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diff changeset
   835
<a href="#networkservice">NetworkService</a> implements <a href=
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Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   836
"http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#interface-eventtarget"
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   837
     class="externalDFN">EventTarget</a>;
180
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   838
</pre>
239
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parents: 238
diff changeset
   839
      <section>
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parents: 238
diff changeset
   840
        <h2>
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parents: 238
diff changeset
   841
          Attributes
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   842
        </h2>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   843
        <dl class="domintro">
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parents: 238
diff changeset
   844
          <dt>
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parents: 238
diff changeset
   845
            <var title="">service</var> . <code title="dom-networkservice-id"><a href=
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   846
            "#dom-networkservice-id">id</a></code>
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parents: 238
diff changeset
   847
          </dt>
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parents: 238
diff changeset
   848
          <dd>
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parents: 238
diff changeset
   849
            <p>
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parents: 238
diff changeset
   850
              A unique identifier for the given user-selected service instance.
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parents: 238
diff changeset
   851
            </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   852
          </dd>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   853
          <dt>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   854
            <var title="">service</var> . <code title="dom-networkservice-name"><a href=
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diff changeset
   855
            "#dom-networkservice-name">name</a></code>
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parents: 238
diff changeset
   856
          </dt>
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parents: 238
diff changeset
   857
          <dd>
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parents: 238
diff changeset
   858
            <p>
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diff changeset
   859
              The name of the user-selected service.
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parents: 238
diff changeset
   860
            </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   861
          </dd>
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parents: 238
diff changeset
   862
          <dt>
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parents: 238
diff changeset
   863
            <var title="">service</var> . <code title="dom-networkservice-type"><a href=
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parents: 238
diff changeset
   864
            "#dom-networkservice-type">type</a></code>
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parents: 238
diff changeset
   865
          </dt>
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parents: 238
diff changeset
   866
          <dd>
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parents: 238
diff changeset
   867
            <p>
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parents: 238
diff changeset
   868
              The <a>valid service type</a> token value of the user-selected service.
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   869
            </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   870
          </dd>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   871
          <dt>
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parents: 238
diff changeset
   872
            <var title="">service</var> . <code title="dom-networkservice-url"><a href=
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parents: 238
diff changeset
   873
            "#dom-networkservice-url">url</a></code>
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parents: 238
diff changeset
   874
          </dt>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   875
          <dd>
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parents: 238
diff changeset
   876
            <p>
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parents: 238
diff changeset
   877
              The control URL endpoint (including any required port information) of the user-selected control service
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parents: 238
diff changeset
   878
              that has been added to the <a>entry script origin's URL whitelist</a>.
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   879
            </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   880
          </dd>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   881
          <dt>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   882
            <var title="">service</var> . <code title="dom-networkservice-config"><a href=
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   883
            "#dom-networkservice-config">config</a></code>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   884
          </dt>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   885
          <dd>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   886
            <p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   887
              The configuration information associated with the service depending on the requested service type.
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   888
            </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   889
          </dd>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   890
        </dl>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   891
        <p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   892
          The <dfn id="dom-networkservice-id"><code>id</code></dfn> attribute is a unique identifier for the service.
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
   893
          The same service provided at different times or on different objects MUST have the same <a href=
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
   894
          "#dom-networkservice-id"><code>id</code></a> value.
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   895
        </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   896
        <p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   897
          The <dfn id="dom-networkservice-name"><code>name</code></dfn> attribute represents a human-readable title for
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   898
          the service.
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   899
        </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   900
        <p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   901
          The <dfn id="dom-networkservice-type"><code>type</code></dfn> attribute reflects the value of the <a>valid
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   902
          service type</a> of the service.
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   903
        </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   904
        <p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   905
          The <dfn id="dom-networkservice-url"><code>url</code></dfn> attribute is an <a href=
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   906
          "http://www.w3.org/TR/html5/urls.html#absolute-url"
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   907
             class="externalDFN">absolute URL</a> pointing to the root HTTP endpoint for the service that has been
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   908
             added to the <a>entry script origin's URL whitelist</a>. Web pages can subsequently use this value for
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   909
             implicit cross-document messaging via various existing mechanisms (e.g. Web Sockets, Server-Sent Events,
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   910
             Web Messaging, XMLHttpRequest).
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   911
        </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   912
        <p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   913
          The <dfn id="dom-networkservice-config"><code>config</code></dfn> attribute provides the raw configuration
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   914
          information extracted from the given network service.
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   915
        </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   916
      </section>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   917
      <section>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   918
        <h3>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   919
          States
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   920
        </h3>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   921
        <dl class="domintro">
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   922
          <dt>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   923
            <var title="">service</var> . <code title="dom-networkservice-online"><a href=
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   924
            "#dom-networkservice-online">online</a></code>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   925
          </dt>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   926
          <dd>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   927
            <p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   928
              Returns <code>true</code> if the service is reporting that it is accessible on the local network or
390
6211d232766d Update spec to clarify that devices don't (necessarily) report themselves as offline
Rich Tibbett <richt@opera.com>
parents: 388
diff changeset
   929
              <code>false</code> if the service is no longer accessible (temporarily or permanently) on the local
6211d232766d Update spec to clarify that devices don't (necessarily) report themselves as offline
Rich Tibbett <richt@opera.com>
parents: 388
diff changeset
   930
              network.
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   931
            </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   932
          </dd>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   933
        </dl>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   934
        <p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   935
          The <dfn id="dom-networkservice-online"><code>online</code></dfn> attribute indicates whether the service is
390
6211d232766d Update spec to clarify that devices don't (necessarily) report themselves as offline
Rich Tibbett <richt@opera.com>
parents: 388
diff changeset
   936
          either <var>online</var>, and therefore accessible on the local network, in which case this attribute will
6211d232766d Update spec to clarify that devices don't (necessarily) report themselves as offline
Rich Tibbett <richt@opera.com>
parents: 388
diff changeset
   937
          return <code>true</code> or, <var>offline</var>, and therefore not accessible on the local network, either
6211d232766d Update spec to clarify that devices don't (necessarily) report themselves as offline
Rich Tibbett <richt@opera.com>
parents: 388
diff changeset
   938
          temporarily or permanently, in which case this attribute will return <code>false</code>. This attribute MUST
6211d232766d Update spec to clarify that devices don't (necessarily) report themselves as offline
Rich Tibbett <richt@opera.com>
parents: 388
diff changeset
   939
          default to <code>true</code>.
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   940
        </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   941
      </section>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   942
      <section>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   943
        <h3>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   944
          Events
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   945
        </h3>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   946
        <p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   947
          The following are the event handlers (and their corresponding event handler event types) that <em class=
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   948
          "ct">MUST</em> be supported, as IDL attributes, by all objects implementing the <a href=
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   949
          "#networkservice"><code>NetworkService</code></a> interface:
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   950
        </p>
243
220f3226b2a1 Apply pub rules to proposed Working Draft update
Rich Tibbett <richt@opera.com>
parents: 241
diff changeset
   951
        <table border="1">
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   952
          <thead>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   953
            <tr>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   954
              <th>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   955
                <span title="event handlers">Event handler</span>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   956
              </th>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   957
              <th>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   958
                <span>Event handler event type</span>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   959
              </th>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   960
            </tr>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   961
          </thead>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   962
          <tbody>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   963
            <tr>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   964
              <td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   965
                <dfn id="dom-networkservice-onnotify"
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   966
                    title="dom-NetworkService-onnotify"><code>onnotify</code></dfn>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   967
              </td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   968
              <td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   969
                <a href="#event-notify"><code>notify</code></a>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   970
              </td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   971
            </tr>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   972
            <tr>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   973
              <td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   974
                <dfn id="dom-networkservice-onserviceonline"
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   975
                    title="dom-NetworkService-onserviceonline"><code>onserviceonline</code></dfn>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   976
              </td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   977
              <td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   978
                <a href="#event-serviceonline"><code>serviceonline</code></a>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   979
              </td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   980
            </tr>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   981
            <tr>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   982
              <td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   983
                <dfn id="dom-networkservice-onserviceoffline"
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   984
                    title="dom-NetworkService-onserviceoffline"><code>onserviceoffline</code></dfn>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   985
              </td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   986
              <td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   987
                <a href="#event-serviceoffline"><code>serviceoffline</code></a>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   988
              </td>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   989
            </tr>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   990
          </tbody>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   991
        </table>
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diff changeset
   992
      </section>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   993
    </section>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   994
    <section>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
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parents: 238
diff changeset
   995
      <h2>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   996
        Service Discovery
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   997
      </h2>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
   998
      <p>
243
220f3226b2a1 Apply pub rules to proposed Working Draft update
Rich Tibbett <richt@opera.com>
parents: 241
diff changeset
   999
        A <a>user agent</a> conforming to this specification MAY implement <abbr title=
373
bc1d9819cad3 Clarify rules for 'adding an available service' and 'removing an available service' from http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html
Rich Tibbett <richt@opera.com>
parents: 372
diff changeset
  1000
        "Simple Service Discovery Protocol">SSDP</abbr> [[!UPNP-DEVICEARCH11]], Zeroconf [[!DNS-SD]] + [[!MDNS]] and/or
371
8b03e17da083 Rewrite Step 9 of getNetworkService algorithm following feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Sep/0141.html
Rich Tibbett <richt@opera.com>
parents: 332
diff changeset
  1001
        <abbr title="Discovery and Launch Protocol">DIAL</abbr> [<a href=
8b03e17da083 Rewrite Step 9 of getNetworkService algorithm following feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Sep/0141.html
Rich Tibbett <richt@opera.com>
parents: 332
diff changeset
  1002
        "https://sites.google.com/a/dial-multiscreen.org/dial/dial-protocol-specification">DIAL</a>] <dfn>service
8b03e17da083 Rewrite Step 9 of getNetworkService algorithm following feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Sep/0141.html
Rich Tibbett <richt@opera.com>
parents: 332
diff changeset
  1003
        discovery mechanisms</dfn> - the requirements detailed in this section of the specification - to enable Web
373
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Rich Tibbett <richt@opera.com>
parents: 372
diff changeset
  1004
        pages to request and connect with HTTP services running on networked devices, discovered via any of these
bc1d9819cad3 Clarify rules for 'adding an available service' and 'removing an available service' from http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html
Rich Tibbett <richt@opera.com>
parents: 372
diff changeset
  1005
        mechanisms, through this API. When a <a>user agent</a> implements any of these <a>service discovery
bc1d9819cad3 Clarify rules for 'adding an available service' and 'removing an available service' from http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html
Rich Tibbett <richt@opera.com>
parents: 372
diff changeset
  1006
        mechanisms</a>, then it MUST conform to the corresponding algorithms provided in this section of the
bc1d9819cad3 Clarify rules for 'adding an available service' and 'removing an available service' from http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html
Rich Tibbett <richt@opera.com>
parents: 372
diff changeset
  1007
        specification.
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1008
      </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1009
      <p>
373
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Rich Tibbett <richt@opera.com>
parents: 372
diff changeset
  1010
        This section presents how the results of these <a>service discovery mechanisms</a> will be matched to requested
bc1d9819cad3 Clarify rules for 'adding an available service' and 'removing an available service' from http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html
Rich Tibbett <richt@opera.com>
parents: 372
diff changeset
  1011
        service types, how the user agent stores available and active services and how their properties are applied to
bc1d9819cad3 Clarify rules for 'adding an available service' and 'removing an available service' from http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html
Rich Tibbett <richt@opera.com>
parents: 372
diff changeset
  1012
        any resulting <a href="#networkservice"><code>NetworkService</code></a> objects.
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1013
      </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1014
      <p>
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1015
        It is expected that user agents will perform these <a>service discovery mechanisms</a> asynchronously and
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1016
        periodically update the <a>list of available service records</a> as required. The timing of any <a>service
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1017
        discovery mechanisms</a> is an implementation detail left to the discretion of the implementer (e.g. by
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1018
        continuously monitoring the network as a background process or on invocation of this API from a Web page).
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1019
      </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1020
      <p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1021
        The <dfn>list of available service records</dfn> is a single dynamic internal lookup table within user agents
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1022
        that is used to track all the services that have been discovered and are available in the current network at
372
7639401e21f4 Allow SSDP service discovery request to issue an ST header equal to 'ssdp:all', 'upnp:rootdevice' or urn:schemas-upnp-org:service:serviceType:ver
Rich Tibbett <richt@opera.com>
parents: 371
diff changeset
  1023
        the current time. At any point during the running of either of the two <a>service discovery mechanisms</a> then
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1024
        existing entries within this table can be updated, entries can be added and entries can be removed as the
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1025
        status of networked services changes according to the rules defined in this specification.
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1026
      </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1027
      <p>
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1028
        The <dfn>list of active service managers</dfn> is an internal list within user agents that is used to track all
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1029
        <a href="#networkservices"><code>NetworkServices</code></a> objects currently being shared with any web pages
371
8b03e17da083 Rewrite Step 9 of getNetworkService algorithm following feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Sep/0141.html
Rich Tibbett <richt@opera.com>
parents: 332
diff changeset
  1030
        at the current time within the user agent. Each <a href="#networkservices"><code>NetworkServices</code></a>
8b03e17da083 Rewrite Step 9 of getNetworkService algorithm following feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Sep/0141.html
Rich Tibbett <richt@opera.com>
parents: 332
diff changeset
  1031
        object in the <a>list of active service managers</a> represents a collection of zero or more <a href=
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1032
        "#networkservice"><code>NetworkService</code></a> objects - known as its <dfn>indexed properties</dfn>.
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1033
        <a href="#networkservice"><code>NetworkService</code></a> objects are attached as the <a>indexed properties</a>
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1034
        of a <a href="#networkservices"><code>NetworkServices</code></a> object as part of the <a href=
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1035
        "#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a> algorithm.
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1036
      </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1037
      <p>
387
abb49f62a775 Clarify the terms 'new service', 'existing service' and 'current service'
Rich Tibbett <richt@opera.com>
parents: 378
diff changeset
  1038
        The rule for <dfn>adding an available service</dfn> is the process of adding a <a>new service</a> or updating
abb49f62a775 Clarify the terms 'new service', 'existing service' and 'current service'
Rich Tibbett <richt@opera.com>
parents: 378
diff changeset
  1039
        an <a>existing service</a> that is generally available on the user's current network in the <a>list of
abb49f62a775 Clarify the terms 'new service', 'existing service' and 'current service'
Rich Tibbett <richt@opera.com>
parents: 378
diff changeset
  1040
        available service records</a>. This rule takes one argument, <var>network service record</var>, and consists of
abb49f62a775 Clarify the terms 'new service', 'existing service' and 'current service'
Rich Tibbett <richt@opera.com>
parents: 378
diff changeset
  1041
        running the following steps:
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1042
      </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1043
      <ol class="rule">
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1044
        <li>For each <var>existing service record</var> in the current <a>list of available service records</a>, run
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1045
        the following sub-steps:
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1046
          <ol class="rule">
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1047
            <li>If the <var>existing service record</var>'s <code>id</code> property does not equal <var>network
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1048
            service record</var>'s <code>id</code> property then abort any remaining sub-steps and continue at the next
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1049
            available <var>existing service record</var>.
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1050
            </li>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1051
            <li>Replace the value of <var>existing service record</var> in the current <a>list of available service
373
bc1d9819cad3 Clarify rules for 'adding an available service' and 'removing an available service' from http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html
Rich Tibbett <richt@opera.com>
parents: 372
diff changeset
  1052
            records</a> with the value of <var>network service record</var>, aborting any remaining steps in this
bc1d9819cad3 Clarify rules for 'adding an available service' and 'removing an available service' from http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html
Rich Tibbett <richt@opera.com>
parents: 372
diff changeset
  1053
            algorithm and return.
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1054
            </li>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1055
          </ol>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1056
        </li>
373
bc1d9819cad3 Clarify rules for 'adding an available service' and 'removing an available service' from http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html
Rich Tibbett <richt@opera.com>
parents: 372
diff changeset
  1057
        <li>Add <var>network service record</var> to the <a>list of available service records</a> as a new item.
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1058
        </li>
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1059
        <li>For each <var>service manager</var> in the <a>list of active service managers</a> run the following steps:
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1060
          <ol class="rule">
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1061
            <li>For each <var>active service</var> in <var>service manager</var> run the following steps:
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1062
              <ol class="rule">
373
bc1d9819cad3 Clarify rules for 'adding an available service' and 'removing an available service' from http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html
Rich Tibbett <richt@opera.com>
parents: 372
diff changeset
  1063
                <li>If the <var>network service record</var>'s <code>id</code> property equals the <var>active
392
38bf34c08d76 Only set online to true if it was previously false in Step 3.1.1 of the rule for 'adding an available service'.
Rich Tibbett <richt@opera.com>
parents: 391
diff changeset
  1064
                service</var>'s <code>id</code> attribute and <var>active service</var>'s <code>online</code> attribute
38bf34c08d76 Only set online to true if it was previously false in Step 3.1.1 of the rule for 'adding an available service'.
Rich Tibbett <richt@opera.com>
parents: 391
diff changeset
  1065
                is currently set to <code>false</code> then set <var>active service</var>'s <a href=
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1066
                "#dom-networkservice-online"><code>online</code></a> attribute to <code>true</code> and then <a href=
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1067
                "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1068
                      class="externalDFN">queue a task</a> to dispatch a newly created event with the name <a href=
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1069
                      "#event-serviceonline"><code>serviceonline</code></a> that uses the <a href=
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1070
                      "http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1071
                      class="externalDFN"><code>Event</code></a> interface, which does not bubble, is not cancellable,
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1072
                      and has no default action, at the current <var>active service</var> object.
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1073
                </li>
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1074
              </ol>
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1075
            </li>
375
f290bbd84426 Increment/decrement servicesAvailable in rules for 'adding an available service' and 'removing an available service' based on the original requested control types provided in the original getNetworkServices() call (from: http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html)
Rich Tibbett <richt@opera.com>
parents: 374
diff changeset
  1076
            <li>Let <var>'service type in current service manager' flag</var> be <code>false</code>.
f290bbd84426 Increment/decrement servicesAvailable in rules for 'adding an available service' and 'removing an available service' based on the original requested control types provided in the original getNetworkServices() call (from: http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html)
Rich Tibbett <richt@opera.com>
parents: 374
diff changeset
  1077
            </li>
f290bbd84426 Increment/decrement servicesAvailable in rules for 'adding an available service' and 'removing an available service' based on the original requested control types provided in the original getNetworkServices() call (from: http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html)
Rich Tibbett <richt@opera.com>
parents: 374
diff changeset
  1078
            <li>For each <var>requested control type</var> of the <var>requested control types</var> in <var>service
f290bbd84426 Increment/decrement servicesAvailable in rules for 'adding an available service' and 'removing an available service' based on the original requested control types provided in the original getNetworkServices() call (from: http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html)
Rich Tibbett <richt@opera.com>
parents: 374
diff changeset
  1079
            manager</var> run the following steps:
f290bbd84426 Increment/decrement servicesAvailable in rules for 'adding an available service' and 'removing an available service' based on the original requested control types provided in the original getNetworkServices() call (from: http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html)
Rich Tibbett <richt@opera.com>
parents: 374
diff changeset
  1080
              <ol class="rule">
f290bbd84426 Increment/decrement servicesAvailable in rules for 'adding an available service' and 'removing an available service' based on the original requested control types provided in the original getNetworkServices() call (from: http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html)
Rich Tibbett <richt@opera.com>
parents: 374
diff changeset
  1081
                <li>If <var>network service record</var>'s <code>type</code> property does not equal <var>requested
f290bbd84426 Increment/decrement servicesAvailable in rules for 'adding an available service' and 'removing an available service' based on the original requested control types provided in the original getNetworkServices() call (from: http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html)
Rich Tibbett <richt@opera.com>
parents: 374
diff changeset
  1082
                control type</var> then abort any remaining sub-steps and continue at the next available <var>requested
f290bbd84426 Increment/decrement servicesAvailable in rules for 'adding an available service' and 'removing an available service' based on the original requested control types provided in the original getNetworkServices() call (from: http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html)
Rich Tibbett <richt@opera.com>
parents: 374
diff changeset
  1083
                control type</var>.
f290bbd84426 Increment/decrement servicesAvailable in rules for 'adding an available service' and 'removing an available service' based on the original requested control types provided in the original getNetworkServices() call (from: http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html)
Rich Tibbett <richt@opera.com>
parents: 374
diff changeset
  1084
                </li>
f290bbd84426 Increment/decrement servicesAvailable in rules for 'adding an available service' and 'removing an available service' based on the original requested control types provided in the original getNetworkServices() call (from: http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html)
Rich Tibbett <richt@opera.com>
parents: 374
diff changeset
  1085
                <li>Set the <var>'service type in current service manager' flag</var> to <code>true</code>, abort any
f290bbd84426 Increment/decrement servicesAvailable in rules for 'adding an available service' and 'removing an available service' based on the original requested control types provided in the original getNetworkServices() call (from: http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html)
Rich Tibbett <richt@opera.com>
parents: 374
diff changeset
  1086
                remaining sub-steps and continue.
f290bbd84426 Increment/decrement servicesAvailable in rules for 'adding an available service' and 'removing an available service' based on the original requested control types provided in the original getNetworkServices() call (from: http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html)
Rich Tibbett <richt@opera.com>
parents: 374
diff changeset
  1087
                </li>
f290bbd84426 Increment/decrement servicesAvailable in rules for 'adding an available service' and 'removing an available service' based on the original requested control types provided in the original getNetworkServices() call (from: http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html)
Rich Tibbett <richt@opera.com>
parents: 374
diff changeset
  1088
              </ol>
f290bbd84426 Increment/decrement servicesAvailable in rules for 'adding an available service' and 'removing an available service' based on the original requested control types provided in the original getNetworkServices() call (from: http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html)
Rich Tibbett <richt@opera.com>
parents: 374
diff changeset
  1089
            </li>
373
bc1d9819cad3 Clarify rules for 'adding an available service' and 'removing an available service' from http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html
Rich Tibbett <richt@opera.com>
parents: 372
diff changeset
  1090
            <li>If the <var>'service type in current service manager' flag</var> is set to <code>true</code> then
bc1d9819cad3 Clarify rules for 'adding an available service' and 'removing an available service' from http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html
Rich Tibbett <richt@opera.com>
parents: 372
diff changeset
  1091
            increment <var>service manager</var>'s <a href=
bc1d9819cad3 Clarify rules for 'adding an available service' and 'removing an available service' from http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html
Rich Tibbett <richt@opera.com>
parents: 372
diff changeset
  1092
            "#dom-networkservices-servicesavailable"><code>servicesAvailable</code></a> attribute by <code>1</code> and
bc1d9819cad3 Clarify rules for 'adding an available service' and 'removing an available service' from http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html
Rich Tibbett <richt@opera.com>
parents: 372
diff changeset
  1093
            then <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task"
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1094
                  class="externalDFN">queue a task</a> to dispatch a newly created event with the name <a href=
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1095
                  "#event-serviceavailable"><code>serviceavailable</code></a> that uses the <a href=
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1096
                  "http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#event"
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1097
                  class="externalDFN"><code>Event</code></a> interface, which does not bubble, is not cancellable, and
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1098
                  has no default action, at the current <var>service manager</var> object.
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1099
            </li>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1100
          </ol>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1101
        </li>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1102
      </ol>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1103
      <p>
387
abb49f62a775 Clarify the terms 'new service', 'existing service' and 'current service'
Rich Tibbett <richt@opera.com>
parents: 378
diff changeset
  1104
        The rule for <dfn>removing an available service</dfn> is the general process of removing an <a>existing
abb49f62a775 Clarify the terms 'new service', 'existing service' and 'current service'
Rich Tibbett <richt@opera.com>
parents: 378
diff changeset
  1105
        service</a> from the <a>list of available service records</a> that has left the user's current network or has
abb49f62a775 Clarify the terms 'new service', 'existing service' and 'current service'
Rich Tibbett <richt@opera.com>
parents: 378
diff changeset
  1106
        otherwise expired. This rule takes one argument, <var>service identifier</var>, and consists of running the
abb49f62a775 Clarify the terms 'new service', 'existing service' and 'current service'
Rich Tibbett <richt@opera.com>
parents: 378
diff changeset
  1107
        following steps:
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1108
      </p>
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1109
      <ol class="rule">
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1110
        <li>For each <var>existing service record</var> in the current <a>list of available service records</a>, run
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1111
        the following sub-steps:
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1112
          <ol class="rule">
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1113
            <li>If the <var>existing service record</var>'s <code>id</code> property does not match <var>service
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1114
            identifier</var> then skip any remaining sub-steps for the current <var>existing service record</var> and
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1115
            continue at the next available <var>existing service record</var>.
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1116
            </li>
378
89d1cef16d35 Only remove UPnP Events subscription once it is no longer in use by any active services
Rich Tibbett <richt@opera.com>
parents: 377
diff changeset
  1117
            <li>Let <var>'service type in use' flag</var> be <code>false</code>.
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1118
            </li>
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1119
            <li>For each <var>service manager</var> in the <a>list of active service managers</a> run the following
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1120
            steps:
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1121
              <ol class="rule">
373
bc1d9819cad3 Clarify rules for 'adding an available service' and 'removing an available service' from http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0020.html
Rich Tibbett <richt@opera.com>
parents: 372
diff changeset
  1122
                <li>Let <var>'service type in current service manager' flag</var> be <code>false</code>.
239
7e34654692fc HTML5 Tidy on Network Service Discovery spec markup
Rich Tibbett <richt@opera.com>
parents: 238
diff changeset
  1123
                </li>
250
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1124
                <li>For each <var>active service</var> in <var>service manager</var> run the following steps:
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1125
                  <ol class="rule">
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1126
                    <li>If <var>existing service record</var>'s <code>id</code> property equals the <var>active
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1127
                    service</var>'s <code>id</code> attribute and <var>active service</var>'s <a href=
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1128
                    "#dom-networkservice-online"><code>online</code></a> attribute is currently set to
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1129
                    <code>true</code> then set <var>active service</var>'s <a href="#dom-networkservice-online"><code>
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1130
                      online</code></a> attribute to <code>false</code> and then <a href=
8b912f2bb9c7 Updates to Service Discovery & Messaging according to feedback @ http://lists.w3.org/Archives/Public/public-device-apis/2012Oct/0005.html
Rich Tibbett <richt@opera.com>
parents: 243
diff changeset
  1131
                      "http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task&qu