discovery-api/Overview.src.html
author Rich Tibbett <richt@opera.com>
Fri, 03 Aug 2012 12:59:17 +0200
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<!DOCTYPE html>
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<html>
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  <head>
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    <title>Networked Service Discovery and Messaging</title>
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    <meta http-equiv='Content-Type' content='text/html;charset=utf-8'/>
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    <!-- This spec has been compiled with ReSpec v2 -->
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    <script type="text/javascript" class='remove'>
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      var respecConfig = {
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          specStatus: "unofficial",
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          shortName:  "discovery",
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          edDraftURI: "http://dev.w3.org/2009/dap/discovery/",
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          editors: [
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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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                {   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 and Policy 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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      };
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    </script>
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    <style type="text/css">
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      /**
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       * SyntaxHighlighter
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       * http://alexgorbatchev.com/SyntaxHighlighter
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       *
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       * SyntaxHighlighter is donationware. If you are using it, please donate.
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       * http://alexgorbatchev.com/SyntaxHighlighter/donate.html
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       *
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       * @version
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       * 3.0.83 (July 02 2010)
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       *
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       * @copyright
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       * Copyright (C) 2004-2010 Alex Gorbatchev.
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       *
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       * @license
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       * Dual licensed under the MIT and GPL licenses.
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       */
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       * SyntaxHighlighter
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       * http://alexgorbatchev.com/SyntaxHighlighter
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       *
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       * SyntaxHighlighter is donationware. If you are using it, please donate.
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       * http://alexgorbatchev.com/SyntaxHighlighter/donate.html
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       *
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       * @version
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       * 3.0.83 (July 02 2010)
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       *
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       * @copyright
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       * Copyright (C) 2004-2010 Alex Gorbatchev.
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       *
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       * @license
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       * Dual licensed under the MIT and GPL licenses.
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       */
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    <section id='abstract'>
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diff changeset
   417
      <p>
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   418
        This specification defines a mechanism for an HTML document to discover and subsequently communicate with <acronym title="Hypertext Transfer Protocol">HTTP</acronym>-based services
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   419
        advertised via common discovery protocols within a user's network.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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   420
      </p>
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diff changeset
   421
    </section>
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diff changeset
   422
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   423
    <section id='sotd'>
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diff changeset
   424
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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   425
        This document represents the early consensus of the group on the scope and features of the proposed
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diff changeset
   426
        API.
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diff changeset
   427
      </p>
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diff changeset
   428
    </section>
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diff changeset
   429
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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   430
    <section class="informative">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   431
      <h3>Introduction</h3>
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diff changeset
   432
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diff changeset
   433
      <p>To enable Web pages to connect and communicate with Local-networked Services provided over HTTP, this specification introduces the
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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   434
      <a href="#navigatornetworkservice"><code>NavigatorNetworkService</code></a> interface.</p>
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diff changeset
   435
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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   436
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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   437
         Using this <acronym title="Application Programming Interface">API</acronym> consists of requesting a well-known service type, known by developers and advertised by Local-networked Devices. User authorization, where the user connects the web page to one or more discovered services,
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   438
         is expected before the web page is able to interact with any Local-networked Services.
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   439
      </p>
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diff changeset
   440
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   441
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   442
         A web page creates a request to obtain connectivity to services running in the network by specifying a well-known discovery service type that it wishes to interact with.
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diff changeset
   443
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   444
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   445
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   446
         The user agent, having captured all advertised services on the network from the Service Discovery mechanisms included in this recommendation, attempts to match
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diff changeset
   447
      the requested service type to a discovered service according to the processing described herein.
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diff changeset
   448
      </p>
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diff changeset
   449
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   450
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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   451
          If a service connectivity request is successful then the Web page is provided with the necessary information to communicate with the authorized Local-networked Service.
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diff changeset
   452
          If the request fails then the Web page will receive an error callback containing an error code describing the cause of Local-networked Service connectivity failure.
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diff changeset
   453
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   454
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   455
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   456
         Once connected to a Local-networked Service the Web page can send requests and receive responses to the Local-networked Service via the messaging format and appropriate channel inferred from the service type
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
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diff changeset
   457
         authorized via the provided API.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   458
         The Web page, once connected, can also receive service-pushed events, in the messaging format supported by the Local-networked Device, if such event subscription functionality is provided by the
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
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diff changeset
   459
         connected Local-networked Service.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   460
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   461
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
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diff changeset
   462
      <div class="example">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   463
       <p>Example of requesting a DNS-SD advertised service:</p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   464
       <hr />
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   465
       <pre class="brush:js">function showServices( services ) {
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   466
  // Show a list of all the services provided to the web page
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   467
  for(var i = 0, l = services.length; i < l; i++) console.log( services[i].name );
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   468
}
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   469
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   470
navigator.getNetworkServices('zeroconf:_boxee-jsonrpc._tcp', showServices);</pre>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   471
      </div>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   472
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   473
      <div class="example">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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diff changeset
   474
        <p>Example of requesting a UPnP advertised service, also handling error conditions:</p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   475
        <hr />
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   476
        <pre class="brush:js">function showServices( services ) {
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   477
  // Show a list of all the services provided to the web page
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   478
  for(var i = 0, l = services.length; i < l; i++) console.log( services[i].name );
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
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diff changeset
   479
}
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   480
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   481
function error( e ) {
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   482
  console.log( "Error occurred: " + e.code );
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   483
}
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   484
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   485
navigator.getNetworkServices('upnp:urn:schemas-upnp-org:service:ContentDirectory:1', showServices, error);</pre>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   486
      </div>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   487
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   488
      <div class="example">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   489
        <p>Example of requesting either a DNS-SD or UPnP advertised service:</p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   490
        <hr />
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   491
        <pre class="brush:js">function showServices( services ) {
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   492
  // Show a list of all the services provided to the web page (+ service type)
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
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parents:
diff changeset
   493
  for(var i = 0, l = services.length; i < l; i++)
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   494
     console.log( services[i].name + '(' + services[i].type + ')' );
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   495
}
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   496
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   497
navigator.getNetworkServices([
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   498
  'zeroconf:_boxee-jsonrpc._tcp',
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   499
  'upnp:urn:schemas-upnp-org:service:ContentDirectory:1'
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   500
], showServices);</pre>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   501
      </div>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   502
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   503
      <p>For more detailed examples see the <a href="#examples">Examples</a> section.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   504
    </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   505
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   506
    <section
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   507
     id='conformance'>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   508
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   509
     <p>Requirements phrased in the imperative as part of algorithms (such as "strip any leading space characters" or "return false and abort these steps") are to be interpreted with the
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   510
     meaning of the key word ("must", "should", "may", etc) used in introducing the algorithm.</p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   511
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   512
     <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   513
      Some conformance requirements are phrased as requirements on attributes, methods or objects. Such requirements are to be interpreted as requirements on user agents.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   514
     </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   515
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   516
     <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   517
      Conformance requirements phrased as algorithms or specific steps may be implemented in any manner, so long as the end result is equivalent. (In particular, the algorithms defined in
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   518
      this specification are intended to be easy to follow, and not intended to be performant.)
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   519
     </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   520
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   521
     <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   522
      The only conformance class defined by this specification is a <dfn>user agent</dfn>.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   523
     </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   524
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   525
     <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   526
      User agents may impose implementation-specific limits on otherwise unconstrained inputs, e.g. to prevent denial of service attacks, to guard against running out of memory, or to work
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   527
      around platform-specific limitations.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   528
     </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   529
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   530
     <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   531
      When support for a feature is disabled (e.g. as an emergency measure to mitigate a security problem, or to aid in development, or for performance reasons), user agents must act as if
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   532
      they had no support for the feature whatsoever, and as if the feature was not mentioned in this specification. For example, if a particular feature is accessed via an attribute in a Web
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   533
      IDL interface, the attribute itself would be omitted from the objects that implement that interface - leaving the attribute on the object but making it return null or throw an exception
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   534
      is insufficient.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   535
     </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   536
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   537
      <section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   538
         <h3>Dependencies</h3>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   539
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   540
         This specification relies on several other underlying specifications.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   541
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   542
         <dl>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   543
            <dt>HTML</dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   544
            <dd>Many fundamental concepts from HTML are used by this specification. [[!HTML5]]</dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   545
            <dt>WebIDL</dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   546
            <dd>The IDL blocks in this specification use the semantics of the WebIDL specification. [[!WEBIDL]]</dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   547
         </dl>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   548
      </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   549
    </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   550
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   551
    <section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   552
      <h3>Terminology</h3>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   553
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   554
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   555
         The construction "a <code>Foo</code> object", where <code>Foo</code> is actually an interface, is sometimes used instead of the more accurate "an object implementing the interface <code>Foo</code>".
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   556
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   557
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   558
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   559
         The term DOM is used to refer to the API set made available to scripts in Web applications, and does not necessarily imply the existence of an actual <code>Document</code> object or of any
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   560
         other <code>Node</code> objects as defined in the DOM Core specifications. [[!DOM-CORE]]
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   561
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   562
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   563
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   564
         An IDL attribute is said to be <em>getting</em> when its value is being retrieved (e.g. by author script), and is said to be <em>setting</em> when a new value is assigned to it.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   565
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   566
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   567
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   568
        A <dfn>valid service type</dfn> is a string that begins with <code>upnp:</code> or <code>zeroconf:</code> followed by one or more characters 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, U+005E to U+007E.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   569
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   570
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   571
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   572
        A <a>valid service type</a> provided in the <code>type</code> attribute of the <code>getNetworkServices()</code> method will be matched against the services currently contained in the <a>list of available service records</a> according to the algorithms defined in this specification.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   573
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   574
    </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   575
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   576
    <section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   577
     <h2>Requesting networked services</h2>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   578
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   579
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   580
<pre class="widl">[Supplemental, NoInterfaceObject]
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   581
interface <dfn id="navigatornetworkservice">NavigatorNetworkService</dfn> {
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   582
  // Obtain a Local-networked Service
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   583
  void <a href="#dom-navigator-getnetworkservices">getNetworkServices</a>( in any type,
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   584
                           in <a href="#navigatornetworkservicesuccesscallback">NavigatorNetworkServiceSuccessCallback</a> successCallback,
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   585
                           in optional <a href="#navigatornetworkserviceerrorcallback">NavigatorNetworkServiceErrorCallback</a> errorCallback );
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   586
};
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   587
<a class="externalDFN" href="http://www.whatwg.org/specs/web-apps/current-work/complete/timers.html#navigator">Navigator</a> implements <a href="#navigatornetworkservice">NavigatorNetworkService</a>;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   588
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   589
[Callback=FunctionOnly, NoInterfaceObject]
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   590
interface <dfn id="navigatornetworkservicesuccesscallback">NavigatorNetworkServiceSuccessCallback</dfn> {
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   591
  void handleEvent( in <a href="#networkservices">NetworkServices</a> services );
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   592
};
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   593
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   594
[NoInterfaceObject]
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   595
interface <dfn id="navigatornetworkserviceerror">NavigatorNetworkServiceError</dfn> {
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   596
  const unsigned short <a href="#dom-navigatornetworkserviceerror-permission_denied">PERMISSION_DENIED_ERR</a> = 1;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   597
  const unsigned short <a href="#dom-navigatornetworkserviceerror-unknown_type_prefix">UNKNOWN_TYPE_PREFIX_ERR</a> = 2;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   598
  readonly attribute unsigned short <a href="#dom-navigatornetworkserviceerror-code">code</a>;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   599
};
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   600
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   601
[Callback=FunctionOnly, NoInterfaceObject]
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   602
interface <dfn id="navigatornetworkserviceerrorcallback">NavigatorNetworkServiceErrorCallback</dfn> {
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   603
  void handleEvent( in <a href="#navigatornetworkserviceerror">NavigatorNetworkServiceError</a> error );
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   604
};
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   605
</pre>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   606
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   607
  <section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   608
   <h2>Methods</h2>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   609
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   610
      <dl class="domintro">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   611
        <dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   612
          <var title="">window</var>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   613
           .
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   614
          <code title="dom-navigator">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   615
            <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/timers.html#navigator">navigator</a>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   616
          </code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   617
           .
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   618
          <code title="dom-navigator-getNetworkServices">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   619
            <a href="#dom-navigator-getnetworkservices">getNetworkServices</a>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   620
          </code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   621
          (
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   622
          <var title="">type</var>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   623
          ,
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   624
          <var title="">successCallback</var>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   625
           [,
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   626
          <var title="">errorCallback</var>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   627
           ] )
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   628
        </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   629
        <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   630
          <p>Prompts the user to select one or more discovered network services that have advertised support for the requested service type.</p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   631
          <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   632
            The
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   633
            <var title="">type</var>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   634
             argument contains one or more <a>valid service type</a> tokens that the web page would like to interact with.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   635
          </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   636
          <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   637
            If the user accepts, the
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   638
            <var title="">successCallback</var>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   639
             is
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   640
          invoked, with one or more
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   641
            <code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   642
              <a href="#networkservice"><code>NetworkService</code></a>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   643
            </code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   644
             objects as
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   645
          its argument.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   646
          </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   647
          <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   648
            If the user declines, the
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   649
            <var title="">errorCallback</var>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   650
             (if
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   651
          any) is invoked.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   652
          </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   653
        </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   654
      </dl>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   655
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   656
       <div>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   657
          <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   658
            When the <dfn id="dom-navigator-getnetworkservices" title="dom-navigator-getnetworkservices"><code>getNetworkServices(type, successCallback[, errorCallback])</code></dfn> method is called, the <a>user agent</a> MUST run the following steps:
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   659
          </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   660
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   661
          <ol class="rule">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   662
            <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   663
               If <var>successCallback</var> is empty or is not an object of type <code>Function</code> then the <a>user agent</a> MUST abort these steps.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   664
            </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   665
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   666
            <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   667
              Let <var>requested control types</var> be initially set to an empty array.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   668
            </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   669
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   670
            <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   671
               If <var>type</var> is an array consisting of one or more <a>valid service type</a> tokens, then let <var>requested control types</var> by the value of <var>type</var>, removing any non-<a>valid service type</a> tokens from the resulting array.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   672
            </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   673
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   674
            <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   675
               If <var>type</var> is a string consisting of one <a>valid service type</a> token, then let <var>requested control types</var> be an array containing one item with a value of <var>type</var>.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   676
            </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   677
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   678
            <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   679
               If <var>requested control types</var> is an array that contains at least one or more <a title="valid service type">valid service type</a> tokens then continue to the step labeled <em>process</em> below. Otherwise, the <a>user agent</a> MUST <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task" class="externalDFN">queue a task</a> to invoke <var>errorCallback</var>, if it is provided and is an object of type <code>Function</code>, with a new <a href="#navigatornetworkserviceerror"><code>NavigatorNetworkServiceError</code></a> object whose
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   680
                 <a href="#dom-navigatornetworkserviceerror-code"><code>code</code></a> attribute has the numeric value 2
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   681
                  (<a href="#dom-navigatornetworkserviceerror-unknown_type_prefix"><code>UNKNOWN_TYPE_PREFIX_ERR</code></a>) as its argument,
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   682
                   abort any remaining steps and return.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   683
            </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   684
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   685
            <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   686
               <em>Process</em>: Let <var>services found</var> be an empty array.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   687
            </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   688
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   689
            <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   690
               For each <var>available service</var> in the <a>list of available service records</a> run the following steps:
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   691
               <ol class="rule">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   692
                  <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   693
                    For each <var>requested control type</var> in <var>requested control types</var>: If <var>available service</var>'s <code>type</code> attribute equals the <var>requested control type</var> then let <var>matched service</var> equal the value of <var>available service</var> and continue at the step labeled <var>attach</var> below.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   694
                  </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   695
                  <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   696
                     Continue at the next <var>available service</var>.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   697
                  </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   698
                  <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   699
                     <em>Attach</em>: If <var>matched service</var> is not empty then run the following steps:
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   700
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   701
                     <ol class="rule">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   702
                        <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   703
                           Let <var>new service object</var> be a new <a href="#networkservice"><code>NetworkService</code></a> object, mapping the parameters of
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   704
                     <var>matched service</var> to this new object where possible.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   705
                        </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   706
                        <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   707
                           Append <var>new service object</var> to the <var>services found</var> array.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   708
                        </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   709
                     </ol>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   710
                  </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   711
               </ol>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   712
            </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   713
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   714
            <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   715
               If <var>services found</var> is an empty array, then the <a>user agent</a> MUST <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task" class="externalDFN">queue a task</a> to invoke <var>errorCallback</var>, if it is provided and is an object of type <code>Function</code>, with a new <a href="#navigatornetworkserviceerror"><code>NavigatorNetworkServiceError</code></a> object whose
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   716
                 <a href="#dom-navigatornetworkserviceerror-code"><code>code</code></a> attribute has the numeric value 1
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   717
                 (<a href="#dom-navigatornetworkserviceerror-permission_denied"><code>PERMISSION_DENIED_ERR</code></a>) as its argument, abort any remaining steps and return.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   718
            </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   719
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   720
            <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   721
               Return, and run the remaining steps asynchronously.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   722
            </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   723
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   724
            <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   725
               Optionally, e.g. based on a previously-established user preference, for security reasons, or due to platform limitations, the <a>user agent</a> MAY <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task" class="externalDFN">queue a task</a> to invoke <var>errorCallback</var>, if it is provided and is an object of type <code>Function</code>, with a new <a href="#navigatornetworkserviceerror"><code>NavigatorNetworkServiceError</code></a> object whose
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   726
                 <a href="#dom-navigatornetworkserviceerror-code"><code>code</code></a> attribute has the numeric value 1
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   727
                 (<a href="#dom-navigatornetworkserviceerror-permission_denied"><code>PERMISSION_DENIED_ERR</code></a>) as its argument, abort any remaining steps and return.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   728
            </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   729
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   730
            <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   731
                  The <a>user agent</a> MUST prompt the user in a user-agent-specific manner for permission to provide the
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   732
                  <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/browsers.html#entry-script" class="externalDFN">entry script</a>'s
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   733
                  <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/origin-0.html#origin" class="externalDFN">origin</a> with an array of
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   734
                  <a href="#networkservice"><code>NetworkService</code></a> objects representing the user-authorized subset of <var>services found</var>.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   735
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   736
               <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   737
                  If the user grants permission to access one or more networked services then the <a>user agent</a> SHOULD include an
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   738
                  "ongoing local-network communication" indicator.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   739
               </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   740
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   741
               <p>If the user denies permission, then the <a>user agent</a> MUST <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task" class="externalDFN">queue a task</a> to invoke <var>errorCallback</var>, if it is provided and is an object of type <code>Function</code>, with a new <a href="#navigatornetworkserviceerror"><code>NavigatorNetworkServiceError</code></a> object whose
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   742
                <a href="#dom-navigatornetworkserviceerror-code"><code>code</code></a> attribute has the numeric value 1
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   743
                (<a href="#dom-navigatornetworkserviceerror-permission_denied"><code>PERMISSION_DENIED_ERR</code></a>) as its argument, abort any remaining steps and return.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   744
              </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   745
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   746
              <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   747
                If the user never responds, this algorithm stalls on this step.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   748
              </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   749
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   750
            </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   751
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   752
            <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   753
               Let <var>services</var> be the array of one or more <a href="#networkservice"><code>NetworkService</code></a> objects for which the user granted permission.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   754
            </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   755
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   756
            <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   757
               For each Object <var>service</var> in <var>services</var>, run the following substeps:
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   758
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   759
               <ol class="rule">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   760
                  <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   761
                     Add the <var>service</var>'s <code>url</code> parameter to the <a>entry script origin's <acronym title="Uniform Resource Locator">URL</acronym> whitelist</a>.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   762
                  </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   763
                  <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   764
                    If <var>service</var> was originally created from a UPnP discovery process and the <var>service</var>'s <code>eventsUrl</code> parameter is not empty then <a>setup a UPnP Events Subscription</a> for <var>service</var>.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   765
                  </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   766
               </ol>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   767
            </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   768
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   769
            <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   770
               Let <var>services manager</var> be a new <a href="#networkservices"><code>NetworkServices</code></a> object.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   771
            </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   772
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   773
            <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   774
               Set <var>services manager</var>'s <code>servicesAvailable</code> attribute to the length of <var>services</var>.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   775
            </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   776
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   777
            <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   778
              Store the set of <var>services</var> as <dfn id="current_authorized_services">current authorized services</dfn> internally against the newly created <var>services manager</var> object.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   779
            </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   780
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   781
            <li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   782
               The <a>user agent</a> MUST <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#queue-a-task" class="externalDFN">queue a task</a> to invoke <var>successCallback</var> with
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   783
               <var>services manager</var> as its argument.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   784
            </li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   785
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   786
          </ol>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   787
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   788
          <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   789
            The <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#task-source" class="externalDFN">task source</a> for these
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   790
            <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#concept-task" class="externalDFN">tasks</a> is the
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   791
            <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/webappapis.html#user-interaction-task-source" class="externalDFN">user interaction task source</a>.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   792
          </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   793
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   794
          <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   795
            When a <a href="#networkservice"><code>NetworkService</code></a> object is provided to a Web page, the <a>user agent</a> MUST add the <code>url</code> property
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   796
             to the <dfn>entry script origin's URL whitelist</dfn>. This list enables the
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   797
            Web page to override and initiate cross-site resource requests towards these URLs, and any sub-resources of these URLs, within the current
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   798
            <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/browsers.html#entry-script" class="externalDFN">entry script</a>'s
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   799
            <a href="http://www.whatwg.org/specs/web-apps/current-work/complete/origin-0.html#origin" class="externalDFN">origin</a> via various existing mechanisms (e.g. Web Sockets, Server-Sent Events,
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   800
            Web Messaging, XMLHttpRequest).
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   801
         </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   802
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   803
         <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   804
            If the user navigates away from the current browsing context, the <a>user agent</a> MUST remove all previously whitelisted urls from the <a>entry script origin's URL whitelist</a>.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   805
            There is no persistence to network service selections provided to a web page. It is not possible to access a previously white-listed networked service without the necessary user authorization in all of the following cases:
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   806
            <ul>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   807
              <li>If the current script is reloaded at any point in the same or different window.</li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   808
              <li>if the current script reinvokes the <a href="#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a> method at any point in its execution.</li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   809
              <li>If the user navigates forward or back in their history to reload the current page.</li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   810
              <li>If a script is running in a different origin.</li>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   811
            </ul>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   812
         </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   813
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   814
      </div>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   815
      </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   816
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   817
      <section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   818
         <h3>Error Handling</h3>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   819
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   820
      <dl class="domintro">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   821
        <dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   822
          <var title="">error</var>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   823
           .
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   824
          <code title="dom-NavigatorNetworkServiceError-code">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   825
            <a href="#dom-navigatornetworkserviceerror-code">code</a>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   826
          </code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   827
        </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   828
        <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   829
          <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   830
            Returns the current error's error code. At the current time, this may be <code>1</code> or <code>2</code>, for which the
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   831
            corresponding error constants
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   832
            <a href="#dom-navigatornetworkserviceerror-permission_denied"><code>PERMISSION_DENIED_ERR</code></a> and
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   833
            <a href="#dom-navigatornetworkserviceerror-unknown_type_prefix"><code>UNKNOWN_TYPE_PREFIX_ERR</code></a> are defined.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   834
          </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   835
        </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   836
      </dl>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   837
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   838
         <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   839
            The <dfn id="dom-navigatornetworkserviceerror-code" title="dom-navigatornetworkserviceerror-code"><code>code</code></dfn> attribute of a
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   840
            <a href="#navigatornetworkserviceerror"><code>NavigatorNetworkServiceError</code></a> object MUST return the code for the error, which will be one of the following:
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   841
         </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   842
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   843
         <dl>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   844
            <dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   845
               <dfn id="dom-navigatornetworkserviceerror-permission_denied" title="dom-navigatornetworkserviceerror-permission_denied"><code>PERMISSION_DENIED_ERR</code></dfn> (numeric value 1)
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   846
            </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   847
            <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   848
               The user denied the page permission to access any services.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   849
            </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   850
            <dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   851
               <dfn id="dom-navigatornetworkserviceerror-unknown_type_prefix" title="dom-navigatornetworkserviceerror-unknown_type_prefix"><code>UNKNOWN_TYPE_PREFIX_ERR</code></dfn> (numeric value 2)
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   852
            </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   853
            <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   854
               No <a>valid service type</a> tokens were provided in the method invocation.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   855
            </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   856
         </dl>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   857
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   858
      </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   859
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   860
      </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   861
      <section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   862
      <h2>Obtaining networked services</h2>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   863
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   864
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   865
         The <a href="#networkservices"><code>NetworkServices</code></a> interface is the top-level response object from a call to <a href="#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a> and provides access to a set of user-authorized <a href="#networkservice"><code>NetworkService</code></a> objects for the given request.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   866
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   867
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   868
<pre class="widl">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   869
[NoInterfaceObject]
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   870
interface <dfn id="networkservices">NetworkServices</dfn> {
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   871
  readonly attribute unsigned long    <a href="#dom-networkservices-length">length</a>;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   872
  getter <a href="#networkservice">NetworkService</a> (unsigned long index);
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   873
  <a href="#networkservice">NetworkService</a>? <a href="#dom-networkservices-getservicebyid">getServiceById</a>(DOMString id);
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   874
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   875
  readonly attribute unsigned long    <a href="#dom-networkservices-servicesavailable">servicesAvailable</a>;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   876
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   877
  // event handler attributes
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   878
           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler" class="externalDFN">EventHandler</a>     <a href="#dom-networkservices-onserviceavailable">onserviceavailable</a>;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   879
           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler" class="externalDFN">EventHandler</a>     <a href="#dom-networkservices-onserviceunavailable">onserviceunavailable</a>;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   880
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   881
};
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   882
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   883
<a href="#networkservices">NetworkServices</a> implements <a href="http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#interface-eventtarget" class="externalDFN">EventTarget</a>;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   884
</pre>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   885
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   886
      <section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   887
      <h2>Attributes</h2>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   888
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   889
        <dl class="domintro">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   890
          <dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   891
            <code title="dom-networkservices-length">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   892
              <a href="#dom-networkservices-length">length</a>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   893
            </code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   894
          </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   895
          <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   896
            <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   897
              Returns the current number of services in the respective object's <a>current authorized services</a>.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   898
            </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   899
          </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   900
          <dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   901
            <code title="dom-networkservices-servicesavailable">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   902
              <a href="#dom-networkservices-servicesavailable">servicesAvailable</a>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   903
            </code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   904
          </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   905
          <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   906
            <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   907
              Returns the current number of services matching one of the app-requested <a>valid service type</a> tokens that are actively available within the user's current network.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   908
            </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   909
          </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   910
        </dl>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   911
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   912
        <div>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   913
           <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   914
              The <dfn id="dom-networkservices-length"><code>length</code></dfn> attribute MUST return the number of services represented in the object's corresponding <a>current authorized services</a> list at the time of getting.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   915
           </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   916
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   917
           <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   918
              The <dfn id="dom-networkservices-servicesavailable"><code>servicesAvailable</code></dfn> attribute MUST return the number of services available in the
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   919
              user's network that match the <a>valid service type</a> that was initially used to create the current <a href="#networkservices"><code>NetworkServices</code></a> object.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   920
              By default, <a href="#dom-networkservices-servicesavailable"><code>servicesAvailable</code></a> MUST be set to <code>1</code>.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   921
           </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   922
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   923
           <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   924
             When a previously unknown instance of a networked service matching one or the requested <a href="#dfn-valid-service-type">valid service types</a> becomes available on the user's current network, the <a>user agent</a> MUST fire a new simple
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   925
             event at the <a href="#dom-networkservices-onserviceavailable"><code>onserviceavailable</code></a> event handler.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   926
           </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   927
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   928
           <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   929
             When a previously known instance of a networked service matching one or the requested <a href="#dfn-valid-service-type">valid service types</a> becomes unavailable on the user's current network, the <a>user agent</a> MUST fire a new simple
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   930
             event at the <a href="#dom-networkservices-onserviceunavailable"><code>onserviceunavailable</code></a> event handler.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   931
           </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   932
        </div>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   933
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   934
      </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   935
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   936
      <section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   937
      <h2>Methods</h2>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   938
        <dl class="domintro">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   939
        <dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   940
          <code title="networkservices-getter">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   941
            <a href="#networkservices">services</a>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   942
          </code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   943
          [
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   944
          <var title="">index</var>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   945
          ]
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   946
        </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   947
        <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   948
          <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   949
            Returns the specified <a href="#networkservice"><code>NetworkService</code></a> object.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   950
          </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   951
        </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   952
        <dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   953
          <code title="networkservices-getter">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   954
            <a href="#networkservices">services</a>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   955
          </code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   956
          .
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   957
          <code title="dom-networkservices-getservicebyid">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   958
            <a href="#dom-networkservices-getservicebyid">getServiceById</a>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   959
          </code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   960
          (
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   961
          <var title="">id</var>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   962
          )
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   963
        </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   964
        <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   965
          <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   966
            Returns the <a href="#networkservice"><code>NetworkService</code></a> object with the given identifier, or null if no
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   967
            service has that identifier.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   968
          </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   969
        </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   970
      </dl>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   971
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   972
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   973
        A <a href="#networkservices"><code>NetworkServices</code></a> object represents the current list of zero or more <a>current authorized services</a>, of which zero or more can be available at a time. Each item in <a>current authorized services</a> is represented by a <a href="#networkservice"><code>NetworkService</code></a> object.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   974
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   975
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   976
      <p class="note">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   977
        Each service in a <a href="#networkservices"><code>NetworkServices</code></a> object thus has an index; the first has the index 0, and each subsequent service is numbered one higher than the previous one. If the <a>user agent</a> dynamically adds or removes network services for any reason, then the indices of the services in <a>current authorized services</a> will change dynamically. If the set of network services changes entirely, then all the previous services will be removed from <a>current authorized services</a> and replaced with new services.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   978
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   979
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   980
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   981
        The <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/infrastructure.html#supported-property-indices" class="externalDFN">supported property indices</a> of <a href="#networkservices"><code>NetworkServices</code></a> objects at any instant are the numbers from zero to the number of items in <a>current authorized services</a> represented by the respective object minus one, if any services are represented in <a>current authorized services</a>. If a <a href="#networkservices"><code>NetworkServices</code></a> object represents no <a>current authorized services</a>, it has no <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/infrastructure.html#supported-property-indices" class="externalDFN">supported property indices</a>.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   982
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   983
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   984
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   985
        To <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/infrastructure.html#determine-the-value-of-an-indexed-property" class="externalDFN">determine the value of an indexed property</a> for a given index <var>index</var> in a <a href="#networkservices"><code>NetworkServices</code></a> object's <a>current authorized services</a>, the user agent MUST return the <a href="#networkservice"><code>NetworkService</code></a> object that represents the <var>index</var>th service in <a>current authorized services</a>.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   986
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   987
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   988
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   989
        The <dfn id="dom-networkservices-getservicebyid"><code>getServiceById(id)</code></dfn> method MUST return the first <a href="#networkservice"><code>NetworkService</code></a> object in <a>current authorized services</a> represented by the respective object whose <a href="#dom-networkservice-id"><code>id</code></a> attribute is equal to the value of the <var>id</var> argument.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   990
        When no services in <a>current authorized services</a> match the given argument, the method MUST return null.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   991
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   992
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   993
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   994
         Services available within the local network can connect and disconnect at different times during the execution of a web page. A <a>user agent</a> can
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   995
         inform a web page when the state of networked services matching the requested <a>valid service type</a> change. Web pages can use this information to enable in-page experiences for communicating the state of networked services
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   996
         with the ability to change the particular service or set of services the page is connected to by re-invoking the <a href="#dom-navigator-getnetworkservices"><code>getNetworkServices()</code></a> method.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   997
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   998
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
   999
      </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1000
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1001
      <section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1002
      <h2>Events</h2>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1003
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1004
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1005
         The following are the event handlers (and their corresponding event handler event types) that must be supported, as IDL attributes, by all objects implementing the <a href="#networkservices"><code>NetworkServices</code></a> interface:
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1006
       </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1007
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1008
       <table border="1">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1009
        <thead>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1010
          <tr>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1011
            <th>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1012
              <span title="event handlers">Event handler</span>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1013
            </th>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1014
            <th>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1015
              <span>Event handler event type</span>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1016
            </th>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1017
          </tr>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1018
        </thead>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1019
        <tbody>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1020
          <tr>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1021
            <td>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1022
              <dfn id="dom-networkservices-onserviceavailable" title="dom-NetworkServices-onserviceavailable">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1023
                <code>onserviceavailable</code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1024
              </dfn>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1025
            </td>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1026
            <td>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1027
              <code title="event-serviceavailable">serviceavailable</code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1028
            </td>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1029
          </tr>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1030
          <tr>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1031
            <td>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1032
              <dfn id="dom-networkservices-onserviceunavailable" title="dom-NetworkServices-onserviceunavailable">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1033
                <code>onserviceunavailable</code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1034
              </dfn>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1035
            </td>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1036
            <td>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1037
              <code title="event-serviceunavailable">serviceunavailable</code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1038
            </td>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1039
          </tr>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1040
        </tbody>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1041
      </table>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1042
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1043
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1044
         Events with an event type of <code>serviceavailable</code> or <code>serviceunavailable</code> defined in this specification are simple <code>Event</code> objects.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1045
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1046
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1047
      </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1048
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1049
    </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1050
    <section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1051
    <h2>Communicating with a networked service</h3>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1052
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1053
<p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1054
   The <a href="#networkservice"><code>NetworkService</code></a> interface is used to provide a set of connection information for an HTTP service endpoint and if available, service events, running on a networked device.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1055
</p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1056
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1057
<pre class="widl">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1058
[NoInterfaceObject]
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1059
interface <dfn id="networkservice">NetworkService</dfn> {
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1060
  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
  1061
  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
  1062
  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
  1063
  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
  1064
  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
  1065
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1066
  const unsigned short <a href="#dom-networkservice-AVAILABLE">AVAILABLE</a>      = 1;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1067
  const unsigned short <a href="#dom-networkservice-UNAVAILABLE">UNAVAILABLE</a>    = 2;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1068
  readonly attribute unsigned short   <a href="#dom-networkservice-readystate">readyState</a>;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1069
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1070
  // event handler attributes
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1071
           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler" class="externalDFN">EventHandler</a>     <a href="#dom-networkservice-onreadystatechange">onreadystatechange</a>;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1072
           attribute <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/webappapis.html#eventhandler" class="externalDFN">EventHandler</a>     <a href="#dom-networkservice-onmessage">onmessage</a>;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1073
};
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1074
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1075
<a href="#networkservice">NetworkService</a> implements <a href="http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html#interface-eventtarget" class="externalDFN">EventTarget</a>;
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1076
</pre>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1077
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1078
<section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1079
  <h2>Attributes</h2>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1080
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1081
      <dl class="domintro">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1082
        <dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1083
          <var title="">service</var>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1084
           .
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1085
          <code title="dom-networkservice-id">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1086
            <a href="#dom-networkservice-id">id</a>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1087
          </code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1088
        </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1089
        <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1090
          <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1091
            A unique identifier for the given user-selected service instance.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1092
          </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1093
        </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1094
        <dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1095
          <var title="">service</var>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1096
           .
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1097
          <code title="dom-networkservice-name">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1098
            <a href="#dom-networkservice-name">name</a>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1099
          </code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1100
        </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1101
        <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1102
          <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1103
            The name of the user-selected service.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1104
          </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1105
        </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1106
        <dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1107
          <var title="">service</var>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1108
           .
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1109
          <code title="dom-networkservice-type">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1110
            <a href="#dom-networkservice-type">type</a>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1111
          </code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1112
        </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1113
        <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1114
          <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1115
            The <a>valid service type</a> token value of the user-selected service.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1116
          </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1117
        </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1118
        <dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1119
          <var title="">service</var>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1120
           .
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1121
          <code title="dom-networkservice-url">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1122
            <a href="#dom-networkservice-url">url</a>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1123
          </code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1124
        </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1125
        <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1126
          <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1127
            The control URL endpoint (including any required port information) of the user-selected control service that has been added to the <a>entry script origin's URL whitelist</a>.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1128
          </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1129
        </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1130
        <dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1131
          <var title="">service</var>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1132
           .
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1133
          <code title="dom-networkservice-config">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1134
            <a href="#dom-networkservice-config">config</a>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1135
          </code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1136
        </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1137
        <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1138
          <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1139
            The configuration information associated with the service depending on the requested service type.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1140
          </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1141
        </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1142
      </dl>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1143
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1144
          <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1145
            The <dfn id="dom-networkservice-id"><code>id</code></dfn> attribute is a unique identifier for the service. Two services provided at different times or on different objects MUST have the same <a href="#dom-networkservice-id"><code>id</code></a> value.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1146
         </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1147
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1148
         <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1149
            The <dfn id="dom-networkservice-name"><code>name</code></dfn> attribute represents a human-readable title for the service.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1150
         </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1151
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1152
         <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1153
             The <dfn id="dom-networkservice-type"><code>type</code></dfn> attribute reflects the value of the <a>valid service type</a> of the service.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1154
          </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1155
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1156
         <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1157
            The <dfn id="dom-networkservice-url"><code>url</code></dfn> attribute is an <a href="http://www.w3.org/TR/html5/urls.html#absolute-url" class="externalDFN">absolute URL</a> pointing to the root HTTP
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1158
            endpoint for the service that has been added to the <a>entry script origin's URL whitelist</a>. Web pages can subsequently use this value for implicit cross-document messaging via various existing mechanisms (e.g. Web Sockets, Server-Sent Events, Web Messaging, XMLHttpRequest).
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1159
         </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1160
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1161
         <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1162
            The <dfn id="dom-networkservice-config"><code>config</code></dfn> attribute provides the raw configuration information extracted from the given network service.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1163
         </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1164
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1165
      </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1166
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1167
      <section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1168
         <h3>States</h3>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1169
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1170
      <dl class="domintro">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1171
        <dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1172
          <var title="">service</var>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1173
           .
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1174
          <code title="dom-networkservice-readystate">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1175
            <a href="#dom-networkservice-readystate">readyState</a>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1176
          </code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1177
        </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1178
        <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1179
          <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1180
            Returns the current state.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1181
          </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1182
        </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1183
      </dl>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1184
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1185
         A <a href="#networkservice"><code>NetworkService</code></a> object can be in several states. The <dfn id="dom-networkservice-readystate"><code>readyState</code></dfn> attribute MUST return the current state of the networked service,
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1186
         which MUST be one of the following values:
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1187
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1188
         <dl>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1189
           <dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1190
             <dfn id="dom-networkservice-AVAILABLE" title="dom-networkservice-AVAILABLE">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1191
               <code>AVAILABLE</code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1192
             </dfn>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1193
              (numeric value
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1194
             1)
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1195
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1196
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1197
           </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1198
           <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1199
             <p>The object is connected to its service endpoint.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1200
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1201
            </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1202
           </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1203
           <dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1204
             <dfn id="dom-networkservice-UNAVAILABLE" title="dom-networkservice-UNAVAILABLE">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1205
               <code>UNAVAILABLE</code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1206
             </dfn>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1207
              (numeric value
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1208
             2)
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1209
           </dt>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1210
           <dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1211
             <p>The object is not connected to its service endpoint.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1212
            </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1213
           </dd>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1214
         </dl>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1215
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1216
      </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1217
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1218
      <section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1219
         <h3>Events</h3>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1220
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1221
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1222
         The following are the event handlers (and their corresponding event handler event types) that must be supported, as IDL attributes, by all objects implementing the
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1223
         <a href="#networkservice"><code>NetworkService</code></a> interface:
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1224
       </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1225
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1226
       <table border="1">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1227
        <thead>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1228
          <tr>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1229
            <th>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1230
              <span title="event handlers">Event handler</span>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1231
            </th>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1232
            <th>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1233
              <span>Event handler event type</span>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1234
            </th>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1235
          </tr>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1236
        </thead>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1237
        <tbody>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1238
          <tr>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1239
            <td>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1240
              <dfn id="dom-networkservice-onmessage" title="dom-NetworkService-onmessage">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1241
                <code>onmessage</code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1242
              </dfn>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1243
            </td>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1244
            <td>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1245
              <code title="event-message">message</code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1246
            </td>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1247
          </tr>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1248
          <tr>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1249
            <td>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1250
              <dfn id="dom-networkservice-onreadystatechange" title="dom-NetworkService-onreadystatechange">
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1251
                <code>onreadystatechange</code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1252
              </dfn>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1253
            </td>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1254
            <td>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1255
              <code title="event-onreadystatechange">readystatechange</code>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1256
            </td>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1257
          </tr>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1258
        </tbody>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1259
      </table>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1260
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1261
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1262
         Events with an event type of <code>message</code> defined in this specification are <a href="http://dev.w3.org/html5/postmsg/#messageevent" class="externalDFN"><code>MessageEvent</code></a> objects as defined in [[!WEBMESSAGING]].
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1263
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1264
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1265
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1266
         Events with an event type of <code>readystatechange</code> defined in this specification are simple <code>Event</code> objects.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1267
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1268
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1269
      </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1270
   </section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1271
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1272
      <section>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1273
            <h2>Service Discovery</h2>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1274
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1275
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1276
         A <a>user agent</a> conforming to this specification MAY implement <acronym title="Simple Service Discovery Protocol">SSDP</acronym> [[!UPNP]] and Zeroconf [[!ZEROCONF]] service discovery mechanisms
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1277
         to enable Web pages to request and connect with HTTP services running on networked devices, discovered via either mechanism, through this API. When a <a>user agent</a> implements either of these service discovery mechanisms, then it MUST conform to the corresponding algorithms provided in this section of the specification.
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1278
      </p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett <richt@opera.com>
parents:
diff changeset
  1279
      <p>
ee3a89da06e1 First draft of Networked Service Discovery and Messaging
Rich Tibbett