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2009/dap/netinfo FPWD.html,NONE,1.1

From: Robin Berjon via cvs-syncmail <cvsmail@w3.org>
Date: Wed, 01 Jun 2011 15:18:13 +0000
To: public-dap-commits@w3.org
Message-Id: <E1QRnBV-0006Gz-9g@lionel-hutz.w3.org>
Update of /sources/public/2009/dap/netinfo
In directory hutz:/tmp/cvs-serv24083

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FPWD

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</style><link charset="utf-8" type="text/css" rel="stylesheet" href="http://www.w3.org/StyleSheets/TR/W3C-WD"></head>

  <body style="display: inherit;"><div class="head"><p><a href="http://www.w3.org/"><img src="http://www.w3.org/Icons/w3c_home" alt="W3C" height="48" width="72"></a></p><h1 class="title" id="title">The Network Information API</h1><h2 id="w3c-working-draft-07-june-2011">W3C Working Draft 07 June 2011</h2><dl><dt>This version:</dt><dd><a href="http://www.w3.org/TR/2011/WD-netinfo-api-20110607/">http://www.w3.org/TR/2011/WD-netinfo-api-20110607/</a></dd><dt>Latest published version:</dt><dd><a href="http://www.w3.org/TR/netinfo-api/">http://www.w3.org/TR/netinfo-api/</a></dd><dt>Latest editor's draft:</dt><dd><a href="http://dev.w3.org/2009/dap/netinfo/">http://dev.w3.org/2009/dap/netinfo/</a></dd><dt>Editors:</dt><dd><span>Suresh Chitturi</span>, <a href="http://rim.com/">Research In Motion (RIM)</a></dd>
<dd><a href="http://berjon.com/">Robin Berjon</a>, <a href="http://robineko.com/">Robineko</a></dd>
</dl><p class="copyright"><a href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a> © 2011 <a href="http://www.w3.org/"><acronym title="World Wide Web Consortium">W3C</acronym></a><sup>®</sup> (<a href="http://www.csail.mit.edu/"><acronym title="Massachusetts Institute of Technology">MIT</acronym></a>, <a href="http://www.ercim.eu/"><acronym title="European Research Consortium for Informatics and Mathematics">ERCIM</acronym></a>, <a href="http://www.keio.ac.jp/">Keio</a>), All Rights Reserved. W3C <a href="http://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer">liability</a>, <a href="http://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks">trademark</a> and <a href="http://www.w3.org/Consortium/Legal/copyright-documents">document use</a> rules apply.</p><hr></div>
    <div class="introductory section" id="abstract"><h2>Abstract</h2>
      The Network Information API provides an interface for Web Applications to access the underlying 
      network information (connection info) of the device.
    </div><div id="sotd" class="introductory section"><h2>Status of This Document</h2><p><em>This section describes the status of this document at the time of its publication. Other documents may supersede this document. A list of current W3C publications and the latest revision of this technical report can be found in the <a href="http://www.w3.org/TR/">W3C technical reports index</a> at http://www.w3.org/TR/.</em></p>
      <p>
        The functionality described in this specification was initially specified as part of the
        <a href="http://www.w3.org/TR/system-info-api/">System Information API</a> but has been
        extracted in order to be more readily available, more straightforward to implement, and
        in order to produce a specification that could be implemented on its own merits without
        interference with other, often unrelated, features.
      </p>
    <p>This document was published by the <a href="http://www.w3.org/2009/dap/">Device APIs and Policy Working Group</a> as a First Public Working Draft. This document is intended to become a W3C Recommendation. If you wish to make comments regarding this document, please send them to <a href="mailto:public-device-apis@w3.org">public-device-apis@w3.org</a> (<a href="mailto:public-device-apis-request@w3.org?subject=subscribe">subscribe</a>, <a href="http://lists.w3.org/Archives/Public/public-device-apis/">archives</a>). All feedback is welcome.</p><p>Publication as a Working Draft does not imply endorsement by the W3C Membership. This is a draft document and may be updated, replaced or obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in progress.</p><p>This document was produced by a group operating under the <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/">5 February 2004 W3C Patent Policy</a>. W3C maintains a <a href="http://www.w3.org/2004/01/pp-impl/43696/status" rel="disclosure">public list of any patent disclosures</a> made in connection with the deliverables of the group; that page also includes instructions for disclosing a patent. An individual who has actual knowledge of a patent which the individual believes contains <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/#def-essential">Essential Claim(s)</a> must disclose the information in accordance with <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/#sec-Disclosure">section 6 of the W3C Patent Policy</a>.</p></div><div class="section" id="toc"><h2 class="introductory">Table of Contents</h2><ul class="toc"><li class="tocline"><a class="tocxref" href="#conformance"><span class="secno">1. </span>Conformance</a></li><li class="tocline"><a class="tocxref" href="#introduction"><span class="secno">2. </span>Introduction</a></li><li class="tocline"><a class="tocxref" href="#api-description"><span class="secno">3. </span>API Description</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#the-networkinfo-interface"><span class="secno">3.1 </span>The <span class="idlType formerLink idlType"><code>NetworkInfo</code></span> interface</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#attributes"><span class="secno">3.1.1 </span>Attributes</a></li></ul></li><li class="tocline"><a class="tocxref" href="#the-connection-interface"><span class="secno">3.2 </span>The <span class="idlType formerLink idlType"><code>Connection</code></span> interface</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#attributes-1"><span class="secno">3.2.1 </span>Attributes</a></li></ul></li></ul></li><li class="tocline"><a class="tocxref" href="#changes-in-connection-information"><span class="secno">4. </span>Changes in connection information</a></li><li class="tocline"><a class="tocxref" href="#acknowledgements"><span class="secno">A. </span>Acknowledgements</a></li><li class="tocline"><a class="tocxref" href="#references"><span class="secno">B. </span>References</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#normative-references"><span class="secno">B.1 </span>Normative references</a></li><li class="tocline"><a class="tocxref" href="#informative-references"><span class="secno">B.2 </span>Informative references</a></li></ul></li></ul></div>

    

    <div class="section" id="conformance"><!--OddPage--><h2><span class="secno">1. </span>Conformance</h2><p>As well as sections marked as non-normative, all authoring guidelines, diagrams, examples, and notes in this specification are non-normative. Everything else in this specification is normative.</p>
<p>The key words <em title="must" class="rfc2119">must</em>, <em title="must not" class="rfc2119">must not</em>, <em title="required" class="rfc2119">required</em>, <em title="should" class="rfc2119">should</em>, <em title="should not" class="rfc2119">should not</em>, <em title="recommended" class="rfc2119">recommended</em>, <em title="may" class="rfc2119">may</em>, and <em title="optional" class="rfc2119">optional</em> in this specification are to be interpreted as described in [<cite><a href="#bib-RFC2119" rel="biblioentry" class="bibref">RFC2119</a></cite>].</p>

      <p>
        This specification defines conformance criteria that apply to a single product: the <dfn id="dfn-user-agent">user agent</dfn> that
        implements the interfaces that it contains.
      </p>
      <p>
        Implementations that use ECMAScript to expose the APIs defined in this specification must implement them in a manner
        consistent with the ECMAScript Bindings defined in the Web IDL specification [<cite><a href="#bib-WEBIDL" rel="biblioentry" class="bibref">WEBIDL</a></cite>].
      </p>
    </div>

    <div id="introduction" class="informative section">
      <!--OddPage--><h2><span class="secno">2. </span>Introduction</h2><p><em>This section is non-normative.</em></p>
      <p>
        The Network Information API provides an interface enabling Web applications to access the underlying network
        information (connection type) of the device.
	    </p>
    	<pre class="example sh_javascript sh_sourceCode"><span class="sh_comment">// add a class on the root list that matches a specific connection type</span>
<span class="sh_keyword">function</span> <span class="sh_function">updateConnectionClass</span> <span class="sh_symbol">()</span> <span class="sh_cbracket">{</span>
    <span class="sh_keyword">var</span> root <span class="sh_symbol">=</span> document<span class="sh_symbol">.</span>documentElement<span class="sh_symbol">,</span>
        types <span class="sh_symbol">=</span> <span class="sh_string">"unknown ethernet wifi 2g 3g 4g none"</span><span class="sh_symbol">.</span><span class="sh_function">split</span><span class="sh_symbol">(</span><span class="sh_string">" "</span><span class="sh_symbol">);</span>
    <span class="sh_keyword">for</span> <span class="sh_symbol">(</span><span class="sh_keyword">var</span> i <span class="sh_symbol">=</span> <span class="sh_number">0</span><span class="sh_symbol">,</span> n <span class="sh_symbol">=</span> types<span class="sh_symbol">.</span>length<span class="sh_symbol">;</span> i <span class="sh_symbol">&lt;</span> n<span class="sh_symbol">;</span> i<span class="sh_symbol">++)</span> root<span class="sh_symbol">.</span>classList<span class="sh_symbol">.</span><span class="sh_function">remove</span><span class="sh_symbol">(</span><span class="sh_string">"network-"</span> <span class="sh_symbol">+</span> types<span class="sh_symbol">[</span>i<span class="sh_symbol">])</span>
    root<span class="sh_symbol">.</span>classList<span class="sh_symbol">.</span><span class="sh_function">add</span><span class="sh_symbol">(</span><span class="sh_string">"network-"</span> <span class="sh_symbol">+</span> navigator<span class="sh_symbol">.</span>connection<span class="sh_symbol">.</span>type<span class="sh_symbol">);</span>
<span class="sh_cbracket">}</span>
window<span class="sh_symbol">.</span>onload <span class="sh_symbol">=</span> window<span class="sh_symbol">.</span>ononline <span class="sh_symbol">=</span> window<span class="sh_symbol">.</span>onoffline <span class="sh_symbol">=</span> updateConnectionClass<span class="sh_symbol">;</span></pre>
    </div>

	  <div class="section" id="api-description">
      <!--OddPage--><h2><span class="secno">3. </span>API Description</h2>
      <div class="section" id="the-networkinfo-interface">
        <h3><span class="secno">3.1 </span>The <a class="idlType" href="#idl-def-NetworkInfo"><code>NetworkInfo</code></a> interface</h3>
        <p>
          The <a href="#networkinfo-interface"><code>NetworkInfo</code></a> interface is exposed on the 
          <code>Navigator</code> object.
        </p>
        <pre class="idl"><span class="idlImplements"><a>Navigator</a> implements <a class="idlType" href="#idl-def-NetworkInfo"><code>NetworkInfo</code></a>;</span></pre><div class="idlImplementsDesc"><p>All instances of the <code><a>Navigator</a></code> type are defined to also implement the <a class="idlType" href="#idl-def-NetworkInfo"><code>NetworkInfo</code></a> interface.</p></div>
        <pre class="idl"><span class="idlInterface" id="idl-def-NetworkInfo">[<span class="extAttr">NoInterfaceObject</span>]
interface <span class="idlInterfaceID">NetworkInfo</span> {
<span class="idlAttribute">    readonly attribute <span class="idlAttrType"><a class="idlType" href="#idl-def-Connection"><code>Connection</code></a></span> <span class="idlAttrName"><a href="#widl-NetworkInfo-connection">connection</a></span>;</span>
};</span>
</pre><div class="section" id="attributes"><h4><span class="secno">3.1.1 </span>Attributes</h4><dl class="attributes"><dt id="widl-NetworkInfo-connection"><code>connection</code> of type <span class="idlAttrType"><a class="idlType" href="#idl-def-Connection"><code>Connection</code></a></span>, readonly</dt><dd>
            The object from which connection information is accessed.
          <div><em>No exceptions.</em></div></dd></dl></div>
      </div>
      
      <div class="section" id="the-connection-interface">
		    <h3><span class="secno">3.2 </span>The <a class="idlType" href="#idl-def-Connection"><code>Connection</code></a> interface</h3>
		    <p>
			    The <a class="idlType" href="#idl-def-Connection"><code>Connection</code></a> interface provides a handle to the device's connection information.
		    </p>
        <pre class="idl"><span class="idlInterface" id="idl-def-Connection">[<span class="extAttr">NoInterfaceObject</span>]
interface <span class="idlInterfaceID">Connection</span> {
<span class="idlAttribute">    readonly attribute <span class="idlAttrType"><a>DOMString</a></span> <span class="idlAttrName"><a href="#widl-Connection-type">type</a></span>;</span>
};</span>
</pre><div class="section" id="attributes-1"><h4><span class="secno">3.2.1 </span>Attributes</h4><dl class="attributes"><dt id="widl-Connection-type"><code>type</code> of type <span class="idlAttrType"><a>DOMString</a></span>, readonly</dt><dd>
            <p>
          		Exposes the current connection type. The value returned is one of the following strings,
          		case-sensitively: <code>unknown</code>, <code>ethernet</code>, <code>wifi</code>, <code>2g</code>, 
          		<code>3g</code>, <code>4g</code>, <code>none</code>. Implementers may expose other values,
          		in which case it is <em title="recommended" class="rfc2119">recommended</em> that they are prefixed with a vendor-specific identifier, e.g.
          		<code>acme-superluminal</code>. Other identifiers may be added in the future.
            </p>
            <p class="issue">
              The existing implementation, Android, uses integer constants for this (which is a shame since
              other parts of the Android platform use the more reasonable strings instead). Should we just go with
              it?
            </p>
          <div><em>No exceptions.</em></div></dd></dl></div>
	    </div>
	  </div>
	  
	  <div class="section" id="changes-in-connection-information">
	   <!--OddPage--><h2><span class="secno">4. </span>Changes in connection information</h2>
	   <p>
	     When changes in the underlying device's connection information occur, the <a class="internalDFN" href="#dfn-user-agent">user agent</a> <em title="must" class="rfc2119">must</em>
	     <a class="externalDFN">queue a task</a> to <a class="externalDFN">fire a simple event</a> named
	     either <code>online</code> or <code>offline</code> depending on the applicable value, as defined
	     in [<cite><a href="#bib-HTML5" rel="biblioentry" class="bibref">HTML5</a></cite>].
	   </p>
	   <p>
	     Note that this may cause the same event (<code>online</code> or <code>offline</code>) to be triggered
	     multiple times in succession rather than toggling between either value.
	   </p>
	   <p class="issue">
	     There is discussion about whether this justifies a new event or not. People may have some initialisation
	     code that runs on <code>online</code> which they don't expect to have to run when one switches from
	     Wi-Fi to ethernet. By its very nature, such code should be able to run multiple times with no harm, but
	     it may still be wasteful to do so.
	   </p>
	  </div>	
	    
    <div id="acknowledgements" class="appendix section">
      <!--OddPage--><h2><span class="secno">A. </span>Acknowledgements</h2>
      <p>
        TBD
      </p>
    </div>
  

<div class="appendix section" id="references"><!--OddPage--><h2><span class="secno">B. </span>References</h2><div class="section" id="normative-references"><h3><span class="secno">B.1 </span>Normative references</h3><dl class="bibliography"><dt id="bib-HTML5">[HTML5]</dt><dd>Ian Hickson; David Hyatt. <a href="http://www.w3.org/TR/2010/WD-html5-20100304/"><cite>HTML 5.</cite></a> 4 March 2010. W3C Working Draft. (Work in progress.) URL: <a href="http://www.w3.org/TR/2010/WD-html5-20100304/">http://www.w3.org/TR/2010/WD-html5-20100304/</a> 
</dd><dt id="bib-RFC2119">[RFC2119]</dt><dd>S. Bradner. <a href="http://www.ietf.org/rfc/rfc2119.txt"><cite>Key words for use in RFCs to Indicate Requirement Levels.</cite></a> March 1997. Internet RFC 2119.  URL: <a href="http://www.ietf.org/rfc/rfc2119.txt">http://www.ietf.org/rfc/rfc2119.txt</a> 
</dd><dt id="bib-WEBIDL">[WEBIDL]</dt><dd>Cameron McCormack. <a href="http://www.w3.org/TR/2008/WD-WebIDL-20081219"><cite>Web IDL.</cite></a> 19 December 2008. W3C Working Draft. (Work in progress.) URL: <a href="http://www.w3.org/TR/2008/WD-WebIDL-20081219">http://www.w3.org/TR/2008/WD-WebIDL-20081219</a> 
</dd></dl></div><div class="section" id="informative-references"><h3><span class="secno">B.2 </span>Informative references</h3><p>No informative references.</p></div></div></body></html>
Received on Wednesday, 1 June 2011 15:18:16 GMT

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