Annotation of 2006/webapi/XMLHttpRequest/Overview.src.html, revision 1.189
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4: <title>The XMLHttpRequest Object</title>
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1.147 avankest 23: <link rel="stylesheet" href="http://www.w3.org/StyleSheets/TR/W3C-[STATUS]">
1.1 avankest 24: </head>
25: <body>
26: <div class="head">
27: <p><a href="http://www.w3.org/"><img height="48" width="72" alt="W3C" src="http://www.w3.org/Icons/w3c_home"></a></p>
1.12 avankest 28:
1.156 avankest 29: <h1 class="head" id="the-xmlhttprequest-object">The
30: <code title="">XMLHttpRequest</code> Object</h1>
1.12 avankest 31:
1.149 avankest 32: <h2 class="no-num no-toc" id="w3c-doctype">[LONGSTATUS] [DATE: 3 August 2002]</h2>
1.12 avankest 33:
1.1 avankest 34: <dl>
1.10 avankest 35: <dt>This Version:</dt>
1.173 avankest 36: <dd><a href="[VERSION]/">http://www.w3.org/TR/[YEAR]/ED-XMLHttpRequest-[CDATE]/</a></dd>
1.14 avankest 37:
1.10 avankest 38: <dt>Latest Version:</dt>
1.1 avankest 39: <dd><a href="http://www.w3.org/TR/XMLHttpRequest/">http://www.w3.org/TR/XMLHttpRequest/</a></dd>
1.189 ! avankest 40:
! 41: <dt>Latest Editor Version:</dt>
! 42: <dd><a href="http://dev.w3.org/2006/webapi/XMLHttpRequest/">http://dev.w3.org/2006/webapi/XMLHttpRequest/</a></dd>
1.14 avankest 43:
1.10 avankest 44: <dt>Previous Versions:</dt>
1.173 avankest 45: <dd><a href="http://www.w3.org/TR/2008/WD-XMLHttpRequest-20080415/">http://www.w3.org/TR/2008/WD-XMLHttpRequest-20080415/</a></dd>
1.154 avankest 46: <dd><a href="http://www.w3.org/TR/2007/WD-XMLHttpRequest-20071026/">http://www.w3.org/TR/2007/WD-XMLHttpRequest-20071026/</a></dd>
1.133 avankest 47: <dd><a href="http://www.w3.org/TR/2007/WD-XMLHttpRequest-20070618/">http://www.w3.org/TR/2007/WD-XMLHttpRequest-20070618/</a></dd>
1.58 avankest 48: <dd><a href="http://www.w3.org/TR/2007/WD-XMLHttpRequest-20070227/">http://www.w3.org/TR/2007/WD-XMLHttpRequest-20070227/</a></dd>
1.22 avankest 49: <dd><a href="http://www.w3.org/TR/2006/WD-XMLHttpRequest-20060927/">http://www.w3.org/TR/2006/WD-XMLHttpRequest-20060927/</a></dd>
1.1 avankest 50: <dd><a href="http://www.w3.org/TR/2006/WD-XMLHttpRequest-20060619/">http://www.w3.org/TR/2006/WD-XMLHttpRequest-20060619/</a></dd>
51: <dd><a href="http://www.w3.org/TR/2006/WD-XMLHttpRequest-20060405/">http://www.w3.org/TR/2006/WD-XMLHttpRequest-20060405/</a></dd>
1.14 avankest 52:
1.1 avankest 53: <dt>Editor:</dt>
54: <dd><a href="http://annevankesteren.nl/">Anne van Kesteren</a>
55: (<a href="http://www.opera.com/">Opera Software ASA</a>)
56: <<a href="mailto:annevk@opera.com">annevk@opera.com</a>></dd>
57: </dl>
1.14 avankest 58:
1.1 avankest 59: <p class="copyright"><a href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a>
1.51 avankest 60: © 2007
61: <a href="http://www.w3.org/"><acronym title="World Wide Web Consortium">W3C</acronym></a><sup>®</sup>
62: (<a href="http://www.csail.mit.edu/"><acronym title="Massachusetts Institute of Technology">MIT</acronym></a>,
63: <a href="http://www.ercim.org/"><acronym title="European Research Consortium for Informatics and Mathematics">ERCIM</acronym></a>,
64: <a href="http://www.keio.ac.jp/">Keio</a>), All Rights Reserved. W3C
65: <a href="http://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer">liability</a>,
66: <a href="http://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks">trademark</a>
67: and
68: <a href="http://www.w3.org/Consortium/Legal/copyright-documents">document
69: use</a> rules apply.</p>
1.1 avankest 70: </div>
1.12 avankest 71:
1.1 avankest 72: <hr>
1.12 avankest 73:
1.1 avankest 74: <h2 class="no-num no-toc" id="specabstract">Abstract</h2>
1.10 avankest 75:
1.22 avankest 76: <p>The <code title="">XMLHttpRequest</code> Object specification defines an
77: <abbr title="Application Programming Interface">API</abbr> that provides
78: scripted client functionality for transferring data between a client and a
79: server.</p>
1.12 avankest 80:
1.1 avankest 81: <h2 class="no-num no-toc" id="sotd">Status of this Document</h2>
1.12 avankest 82:
1.1 avankest 83: <p><em>This section describes the status of this document at the time of its
1.36 avankest 84: publication. Other documents may supersede this document. A list of current
85: W3C publications and the latest revision of this technical report can be
86: found in the <a href="http://www.w3.org/TR/">W3C technical reports index</a>
1.117 avankest 87: at http://www.w3.org/TR/.</em></p>
1.36 avankest 88:
1.172 avankest 89: <p>This is the [DATE: 3 August 2002] Last Call Working Draft of The
1.147 avankest 90: <code title="">XMLHttpRequest</code> Object specification. Please send
91: comments to <a href="mailto:public-webapi@w3.org">public-webapi@w3.org</a>
1.47 avankest 92: (<a href="http://lists.w3.org/Archives/Public/public-webapi/">archived</a>)
1.172 avankest 93: with either <samp>[XHR]</samp> or <samp title="">[XMLHttpRequest]</samp>
94: at the start of the subject line before befor 2 June 2008.</p>
1.51 avankest 95:
1.47 avankest 96: <p>This document is produced by the
97: <a href="http://www.w3.org/2006/webapi/">Web API Working Group</a>, part of
98: the <a href="http://www.w3.org/2006/rwc/Activity">Rich Web Clients
99: Activity</a> in the W3C <a href="http://www.w3.org/Interaction/">Interaction
1.51 avankest 100: Domain</a>. Changes made to this document can be found in the
1.47 avankest 101: <a href="http://dev.w3.org/cvsweb/2006/webapi/XMLHttpRequest/Overview.html">W3C
1.117 avankest 102: public CVS server</a>.</p>
1.12 avankest 103:
1.1 avankest 104: <p>Publication as a Working Draft does not imply endorsement by the W3C
1.36 avankest 105: Membership. This is a draft document and may be updated, replaced or
106: obsoleted by other documents at any time. It is inappropriate to cite this
107: document as other than work in progress.</p>
1.12 avankest 108:
1.1 avankest 109: <p>This document was produced by a group operating under the
1.36 avankest 110: <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/">5 February
1.52 avankest 111: 2004 W3C Patent Policy</a>. W3C maintains a
1.36 avankest 112: <a rel="disclosure" href="http://www.w3.org/2004/01/pp-impl/38482/status">public
113: list of any patent disclosures</a> made in connection with the deliverables
114: of the group; that page also includes instructions for disclosing a patent.
115: An individual who has actual knowledge of a patent which the individual
116: believes contains
117: <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/#def-essential">Essential
118: Claim(s)</a> must disclose the information in accordance with
119: <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/#sec-Disclosure">section
120: 6 of the W3C Patent Policy</a>.</p>
1.12 avankest 121:
1.1 avankest 122: <h2 class="no-num no-toc" id="toc">Table of Contents</h2>
1.21 avankest 123:
1.1 avankest 124: <!--toc-->
1.12 avankest 125:
1.1 avankest 126: <h2 id="introduction">Introduction</h2>
1.12 avankest 127:
1.1 avankest 128: <p><em>This section is non-normative.</em></p>
1.12 avankest 129:
1.183 avankest 130: <p>The <code>XMLHttpRequest</code> object implements an interface exposed
131: by a scripting engine that allows scripts to perform HTTP client
132: functionality, such as submitting form data or loading data from a
133: server. It is the ECMAScript HTTP API.</p>
1.24 avankest 134:
1.1 avankest 135: <p>The name of the object is <code>XMLHttpRequest</code> for compatibility
1.183 avankest 136: with the Web, though each component of this name is potentially
137: misleading. First, the object supports any text based format, including
138: XML. Second, it can be used to make requests over both HTTP and HTTPS
139: (some implementations support protocols in addition to HTTP and HTTPS, but
140: that functionality is not covered by this specification). Finally, it
141: supports "requests" in a broad sense of the term as it pertains to HTTP;
142: namely all activity involved with HTTP requests or responses for the
143: defined HTTP methods.</p>
1.12 avankest 144:
1.14 avankest 145: <div class="example">
146: <p>Some simple code to do something with data from an XML document fetched
1.22 avankest 147: over the network:</p>
1.16 avankest 148:
1.58 avankest 149: <pre><code>function test(data) {
1.14 avankest 150: // taking care of data
151: }
152:
153: function handler() {
1.117 avankest 154: if(this.readyState == 4 && this.status == 200) {
1.14 avankest 155: // so far so good
1.117 avankest 156: if(this.responseXML != null && this.responseXML.getElementById('test').firstChild.data)
157: // success!
1.14 avankest 158: test(this.responseXML.getElementById('test').firstChild.data);
159: else
160: test(null);
1.117 avankest 161: } else if (this.readyState == 4 && this.status != 200) {
1.14 avankest 162: // fetched the wrong page or network error...
163: test(null);
164: }
165: }
1.12 avankest 166:
1.14 avankest 167: var client = new XMLHttpRequest();
168: client.onreadystatechange = handler;
169: client.open("GET", "test.xml");
1.58 avankest 170: client.send();</code></pre>
1.16 avankest 171:
1.56 avankest 172: <p>If you just want to log a message to the server:</p>
1.16 avankest 173:
1.58 avankest 174: <pre><code>function log(message) {
1.14 avankest 175: var client = new XMLHttpRequest();
1.56 avankest 176: client.open("POST", "/log");
1.57 avankest 177: client.setRequestHeader("Content-Type", "text/plain;charset=UTF-8");
1.14 avankest 178: client.send(message);
1.58 avankest 179: }</code></pre>
1.16 avankest 180:
1.14 avankest 181: <p>Or if you want to check the status of a document on the server:</p>
1.16 avankest 182:
1.58 avankest 183: <pre><code>function fetchStatus(address) {
1.14 avankest 184: var client = new XMLHttpRequest();
185: client.onreadystatechange = function() {
186: // in case of network errors this might not give reliable results
187: if(this.readyState == 4)
188: returnStatus(this.status);
189: }
190: client.open("HEAD", address);
191: client.send();
1.58 avankest 192: }</code></pre>
1.14 avankest 193: </div>
1.12 avankest 194:
1.153 avankest 195: <h2 id="conformance">Conformance</h2>
1.12 avankest 196:
1.27 avankest 197: <p>Everything in this specification is normative except for diagrams,
198: examples, notes and sections marked non-normative.</p>
1.12 avankest 199:
1.1 avankest 200: <p>The key words <em class="ct">must</em>, <em class="ct">must not</em>,
1.74 avankest 201: <em class="ct">should</em> and <em class="ct">may</em> in this document are
202: to be interpreted as described in RFC 2119.
203: [<cite><span>RFC2119</span></cite>]</p>
1.12 avankest 204:
1.1 avankest 205: <p>This specification defines the following classes of products:</p>
1.12 avankest 206:
1.1 avankest 207: <dl>
1.74 avankest 208: <dt><dfn id="conforming-user-agent">Conforming user agent</dfn></dt>
1.24 avankest 209:
1.74 avankest 210: <dd>
211: <p>A user agent <em class="ct">must</em> behave as described in this
1.106 avankest 212: specification in order to be considered conformant.</p>
1.95 avankest 213:
1.140 avankest 214: <p>If the user agent is not a conforming XML user agent the <span>XML
215: response entity body</span> <em class="ct">must</em> (always) be
216: <code>null</code>.</p>
217:
218: <p>User agents <em class="ct">may</em> implement algorithms given in
219: this specification in any way desired, so long as the end result is
220: indistinguishable from the result that would be obtained by the
221: specification's algorithms.</p>
1.110 avankest 222:
1.95 avankest 223: <p class="note">This specification uses both the terms "conforming user
224: agent(s)" and "user agent(s)" to refer to this product class.</p>
1.74 avankest 225: </dd>
1.110 avankest 226:
1.94 avankest 227: <dt><dfn id="conforming-xml-user-agent">Conforming XML user agent</dfn></dt>
1.110 avankest 228:
1.163 avankest 229: <dd><p>An XML user agent <em class="ct">must</em> be a <span>conforming
230: user agent</span> and <em class="ct">must</em> be a conforming XML
231: processor that reports violations of namespace well-formedness.
232: [<cite><span>XML</span></cite>]
1.140 avankest 233: [<cite><span>XMLNS</span></cite>]</p></dd>
1.1 avankest 234: </dl>
1.32 avankest 235:
1.153 avankest 236: <h3 id="dependencies">Dependencies</h3>
1.33 avankest 237:
1.29 avankest 238: <p>This specification relies on several underlying specifications.</p>
239: <dl>
240: <dt>DOM</dt>
1.33 avankest 241:
1.155 avankest 242: <dd><p>A <span title="conforming user agent">conforming user agent</span>
1.176 avankest 243: <em class="ct">must</em> support at least the subset of the functionality
1.182 avankest 244: defined in DOM Events and DOM Core that this specification relies upon,
245: such as various exceptions and <code>EventTarget</code>.
1.155 avankest 246: [<cite><span>DOM2Events</span></cite>]
247: [<cite><span>DOM3Core</span></cite>]</p></dd>
1.29 avankest 248:
1.161 avankest 249: <dt>HTML 5</dt>
250:
251: <dd>
1.189 ! avankest 252: <p>A <span>conforming user agent</span> <em class="ct">must</em> support
! 253: at least the subset of the functionality defined in HTML 5 that
! 254: this specification relies upon, such as the <code>Window</code> object
! 255: and serializing a <code>Document</code> object.
1.161 avankest 256: [<cite><span>HTML5</span></cite>]</p>
257:
258: <p class="note">The
259: <a href="http://www.w3.org/TR/2006/WD-Window-20060407/">Window Object
260: 1.0</a> draft is not referenced normatively as it appears to be no
261: longer maintained and HTML 5 defines the <code>Window</code> object
262: in more detail. This specification already depends on HTML 5 for
263: other reasons so there is not much additional overhead because of
264: this.</p>
265:
1.29 avankest 266: <dt>HTTP</dt>
1.33 avankest 267:
1.29 avankest 268: <dd>
1.155 avankest 269: <p>A <span>conforming user agent</span>
1.126 avankest 270: <em class="ct">must</em> support some version of the HTTP protocol. It
271: <em class="ct">should</em> support any HTTP method that matches the
1.149 avankest 272: <span><code>Method</code> production</span> and <em class="ct">must</em>
273: at least support the following methods:</p>
1.58 avankest 274:
275: <ul>
276: <li><code>GET</code></li>
277: <li><code>POST</code></li>
278: <li><code>HEAD</code></li>
279: <li><code>PUT</code></li>
280: <li><code>DELETE</code></li>
281: <li><code>OPTIONS</code></li>
282: </ul>
1.135 avankest 283:
1.58 avankest 284: <p>Other requirements regarding HTTP are made throughout the
1.39 avankest 285: specification. [<cite><span>RFC2616</span></cite>]</p>
1.29 avankest 286: </dd>
1.189 ! avankest 287:
1.181 avankest 288: <dt>Web IDL</dt>
289:
290: <dd>A <span>conforming user agent</span> <em class="ct">must</em> also be
291: a conforming implementation of the IDL fragment in this specification, as
292: described in the Web IDL specification.
293: [<cite><span>WebIDL</span></cite>]
1.29 avankest 294: </dl>
1.12 avankest 295:
1.157 avankest 296:
1.153 avankest 297: <h3 id="terminology">Terminology</h3>
1.12 avankest 298:
1.80 avankest 299: <p>There is a <dfn id="case-insensitive-match">case-insensitive match</dfn>
1.153 avankest 300: of strings <var>s1</var> and <var>s2</var> if after mapping the ASCII
301: character range A-Z to the range a-z both strings are identical.</p>
1.144 avankest 302:
1.184 avankest 303: <p>The terms <dfn id="origin">origin</dfn>,
304: <dfn id="same-origin">same origin</dfn>, and
1.157 avankest 305: <dfn id="event-handler-attribute">event handler DOM attribute</dfn> are
306: defined by the HTML 5 specification.
307: [<cite><span>HTML5</span></cite>]</p>
1.155 avankest 308:
1.80 avankest 309:
1.153 avankest 310: <h3 id="extensibility">Extensibility</h3>
1.12 avankest 311:
1.81 avankest 312: <p>Extensions of the API defined by this specification are <em>strongly
1.22 avankest 313: discouraged</em>. User agents, Working Groups and other interested parties
1.33 avankest 314: should discuss extensions on a relevant public forum, preferably
1.22 avankest 315: <a href="mailto:public-webapi@w3.org">public-webapi@w3.org</a>.</p>
1.12 avankest 316:
1.153 avankest 317:
1.157 avankest 318:
1.153 avankest 319: <h2 id="security">Security Considerations</h2>
320:
1.154 avankest 321: <p>Apart from requirements affecting security made throughout this
322: specification implementations <em class="ct">may</em>, at their
1.175 avankest 323: discretion, not expose certain headers, such as headers containing
1.177 avankest 324: HttpOnly cookies. [<cite><span>HTTPONLY</span></cite>]</p>
1.153 avankest 325:
326:
1.157 avankest 327:
1.153 avankest 328: <h2 id="xmlhttprequest">The <code title="">XMLHttpRequest</code>
329: Object</h2>
1.12 avankest 330:
1.58 avankest 331: <p>The <code>XMLHttpRequest</code> object can be used by scripts to
1.22 avankest 332: programmatically connect to their originating server via HTTP.</p>
1.12 avankest 333:
1.1 avankest 334: <p>Objects implementing the <code>XMLHttpRequest</code> interface
1.22 avankest 335: <em class="ct">must</em> also implement the <code>EventTarget</code>
1.155 avankest 336: interface. [<cite><span>DOM2Events</span></cite>]</p>
1.12 avankest 337:
1.58 avankest 338: <p>Objects implementing the <code title="">Window</code> interface
339: <em class="ct">must</em> provide an <code title="">XMLHttpRequest()</code>
1.155 avankest 340: constructor. [<cite><span>HTML5</span></cite>]</p>
1.12 avankest 341:
1.1 avankest 342: <div class="example">
1.58 avankest 343: <p>In ECMAScript this can be used as follows:</p>
344:
345: <pre><code>var client = new XMLHttpRequest();</code></pre>
1.1 avankest 346: </div>
1.12 avankest 347:
1.150 avankest 348: <p>When the <code title="">XMLHttpRequest()</code> constructor is invoked
1.157 avankest 349: a persistent pointer to the associated <code title="">Document</code>
350: object is stored on the newly created object. This is the
351: <dfn title="Document pointer" id="document-pointer"><code>Document</code>
352: pointer</dfn>. The associated <code>Document</code> object is the one
353: returned by the <code>document</code> attribute from the object on which
354: the <code title="">XMLHttpRequest()</code> constructor was invoked (a
355: <code>Window</code> object). The pointer can become "null" if the
356: object is destroyed.</p>
357:
358: <p class="note">As per the conformance criteria implementations are free
359: to implement this in any way they desire as long as the end results are
360: identical to those given by the English prose.</p>
1.27 avankest 361:
1.58 avankest 362: <div class="example">
1.157 avankest 363: <p>If <var><code>iframe</code></var> is a <code title="">Window</code>
1.175 avankest 364: object, <var><code>client</code></var> will have a pointer to
1.157 avankest 365: <var><code>iframe.document</code></var> in the following example:</p>
1.58 avankest 366:
1.157 avankest 367: <pre><code>var client = new iframe.XMLHttpRequest()</code></pre>
1.58 avankest 368: </div>
1.12 avankest 369:
1.181 avankest 370: <pre class="idl">[Constructor] interface <dfn id="xmlhttprequest-object">XMLHttpRequest</dfn> {
1.58 avankest 371: // event handler
1.70 avankest 372: attribute EventListener <span>onreadystatechange</span>;
1.58 avankest 373:
374: // state
1.71 avankest 375: const unsigned short <span title="UNSENT state">UNSENT</span> = 0;
1.134 avankest 376: const unsigned short <span title="OPENED state">OPENED</span> = 1;
1.123 avankest 377: const unsigned short <span title="HEADERS_RECEIVED state">HEADERS_RECEIVED</span> = 2;
1.86 avankest 378: const unsigned short <span title="LOADING state">LOADING</span> = 3;
1.117 avankest 379: const unsigned short <span title="DONE state">DONE</span> = 4;
1.70 avankest 380: readonly attribute unsigned short <span>readyState</span>;
1.58 avankest 381:
382: // request
1.70 avankest 383: void <span>open</span>(in DOMString <var>method</var>, in DOMString <var>url</var>);
384: void <span>open</span>(in DOMString <var>method</var>, in DOMString <var>url</var>, in boolean <var>async</var>);
1.181 avankest 385: void <span>open</span>(in DOMString <var>method</var>, in DOMString <var>url</var>, in boolean <var>async</var>, [Null=Null, Undefined=Null] in DOMString <var>user</var>);
386: void <span>open</span>(in DOMString <var>method</var>, in DOMString <var>url</var>, in boolean <var>async</var>, [Null=Null, Undefined=Null] in DOMString <var>user</var>, [Null=Null, Undefined=Null] in DOMString <var>password</var>);
1.70 avankest 387: void <span>setRequestHeader</span>(in DOMString <var>header</var>, in DOMString <var>value</var>);
388: void <span>send</span>();
1.181 avankest 389: void <span>send</span>([Null=Null, Undefined=Null] in DOMString <var>data</var>);
1.70 avankest 390: void <span>send</span>(in Document <var>data</var>);
391: void <span>abort</span>();
1.58 avankest 392:
393: // response
1.70 avankest 394: DOMString <span>getAllResponseHeaders</span>();
395: DOMString <span>getResponseHeader</span>(in DOMString <var>header</var>);
396: readonly attribute DOMString <span>responseText</span>;
397: readonly attribute Document <span>responseXML</span>;
398: readonly attribute unsigned short <span>status</span>;
399: readonly attribute DOMString <span>statusText</span>;
1.1 avankest 400: };</pre>
1.8 avankest 401:
1.58 avankest 402: <p>The <code>XMLHttpRequest</code> object can be in five states:
1.71 avankest 403: <span title="UNSENT state">UNSENT</span>,
1.134 avankest 404: <span title="OPENED state">OPENED</span>,
1.123 avankest 405: <span title="HEADERS_RECEIVED state">HEADERS_RECEIVED</span>,
1.86 avankest 406: <span title="LOADING state">LOADING</span> and
1.79 avankest 407: <span title="DONE state">DONE</span>. The current state is exposed through
408: the <code>readyState</code> attribute. The method definitions below define
409: when a state transition takes place.</p>
1.58 avankest 410:
411: <p>When constructed, the <code>XMLHttpRequest</code> object
1.71 avankest 412: <em class="ct">must</em> be in the UNSENT state. This state is represented
1.134 avankest 413: by the <dfn id="unsent-state" title="UNSENT state"><code>UNSENT</code></dfn>
1.58 avankest 414: constant, whose value is <code>0</code>.</p>
415:
1.134 avankest 416: <p>The OPENED state is the state of the object when the <code>open()</code>
1.184 avankest 417: method has been successfully invoked. During this state
418: <span>author request headers</span> can
1.58 avankest 419: be set using <code>setRequestHeader()</code> and the request can be made
420: using <code>send()</code>. This state is represented by the
1.134 avankest 421: <dfn id="opened-state" title="OPENED state"><code>OPENED</code></dfn> constant,
1.131 avankest 422: whose value is <code>1</code>.</p>
1.58 avankest 423:
1.134 avankest 424: <p>The OPENED state has an associated <dfn id="send-flag"><code>send()</code>
1.185 avankest 425: flag</dfn> that indicates whether the <code>send()</code> method has been
1.174 avankest 426: invoked. It can be either "true" or "false" and has an initial value of
427: "false".</p>
1.87 avankest 428:
1.123 avankest 429: <p>The HEADERS_RECEIVED state is the state of the object when all response
430: headers have been received. This state is represented by the
1.131 avankest 431: <dfn id="headers-received-state" title="HEADERS_RECEIVED state"><code>HEADERS_RECEIVED</code></dfn>
1.123 avankest 432: constant, whose value is <code>2</code>.</p>
433:
434: <p>The LOADING state is the state of the object when the response entity body
435: is being received. This state is represented by the
1.131 avankest 436: <dfn id="loading-state" title="LOADING state"><code>LOADING</code></dfn> constant,
1.86 avankest 437: whose value is <code>3</code>.</p>
1.58 avankest 438:
1.79 avankest 439: <p>The DONE state is the state of the object when either the data transfer
1.58 avankest 440: has been completed or something went wrong during the transfer (infinite
441: redirects for instance). This state is represented by the
1.131 avankest 442: <dfn id="done-state" title="DONE state"><code>DONE</code></dfn> constant,
443: whose value is <code>4</code>.</p>
1.90 avankest 444:
1.124 avankest 445: <p>The DONE state has an associated <dfn id="error-flag">error flag</dfn>
1.185 avankest 446: that indicates some type of network error or abortion. It can be either
1.174 avankest 447: "true" or "false" and has an initial value of "false".</p>
1.124 avankest 448:
1.88 avankest 449: <p>The <dfn id="response-entity-body">response entity body</dfn> is the
450: fragment of the <span>entity body</span> received so far (LOADING state) or
451: the complete entity body (DONE state). If there is no entity body the
452: response entity body is "null".</p>
453:
454: <p>The <dfn id="text-response-entity-body">text response entity body</dfn>
1.169 avankest 455: is a <code>DOMString</code> representing the <span>response entity
456: body</span>. The text response entity body is the return value of the
457: following algorithm:</p>
1.90 avankest 458:
1.88 avankest 459: <ol>
1.167 avankest 460: <li><p>If the response entity body is "null" return the empty string and
1.107 avankest 461: terminate these steps.</p>
1.90 avankest 462:
1.113 avankest 463: <li><p>Let <var>charset</var> be "null".</p></li>
1.90 avankest 464:
465: <li><p>If there is no <code>Content-Type</code> header or there is a
466: <code>Content-Type</code> header which contains a MIME type that is
1.116 avankest 467: <code>text/xml</code>, <code>application/xml</code> or ends in
1.167 avankest 468: <code title="">+xml</code> (ignoring any parameters) use the rules set
469: forth in the XML specifications to determine the character encoding. Let
1.116 avankest 470: <var>charset</var> be the determined character encoding.</p></li>
1.90 avankest 471:
1.185 avankest 472: <li><p>If the <code>Content-Type</code> header contains a
1.145 avankest 473: <code>text/html</code> MIME type follow the rules set forth in the
474: HTML 5 specification to determine the character encoding. Let
475: <var>charset</var> be the determined character encoding.
476: [<cite><span>HTML5</span></cite>]</p></li>
1.118 avankest 477:
1.115 avankest 478: <li>
1.140 avankest 479: <p>If the MIME type specified by the <code>Content-Type</code> header
480: contains a <code>charset</code> parameter and <var>charset</var> is
481: "null" let <var>charset</var> be the value of that parameter.</p>
1.118 avankest 482:
1.145 avankest 483: <p class="note">The algorithms described by the XML and HTML
484: specifications already take <code>Content-Type</code> into account.</p>
1.115 avankest 485: </li>
1.118 avankest 486:
1.111 avankest 487: <li>
488: <!-- This stuff is copied from HTML5. Thanks Hixie! -->
1.113 avankest 489: <p>If <var>charset</var> is "null" then, for each of the rows in the
1.127 avankest 490: following table, starting with the first one and going down, if the first
491: bytes of <var>bytes</var> match the bytes given in the first column, then
492: let <var>charset</var> be the encoding given in the cell in the second
493: column of that row. If there is no match <var>charset</var> remains
494: "null".</p>
1.117 avankest 495:
496: <table>
497: <thead>
498: <tr>
1.111 avankest 499: <th>Bytes in Hexadecimal
500: <th>Description
1.188 avankest 501: <tbody><!-- UTF-32 is dead
1.117 avankest 502: <tr>
1.111 avankest 503: <td>00 00 FE FF
1.117 avankest 504: <td>UTF-32BE BOM
505: <tr>
506: <td>FF FE 00 00
1.188 avankest 507: <td>UTF-32LE BOM-->
1.117 avankest 508: <tr>
509: <td>FE FF
510: <td>UTF-16BE BOM
511: <tr>
512: <td>FF FE
513: <td>UTF-16LE BOM
514: <tr>
515: <td>EF BB BF
516: <td>UTF-8 BOM<!-- nobody uses this
517: <tr>
518: <td>DD 73 66 73
519: <td>UTF-EBCDIC
520: -->
521: </table>
1.111 avankest 522: </li>
523:
1.113 avankest 524: <li><p>If <var>charset</var> is "null" let <var>charset</var> be
525: UTF-8.</p></li>
526:
1.107 avankest 527: <li><p>Return the result of decoding the response entity body using
1.167 avankest 528: <var>charset</var>. Replace bytes or sequences of bytes that are not
1.173 avankest 529: valid according to the <var>charset</var> with a single U+FFFD
1.167 avankest 530: character.</p></li>
1.88 avankest 531: </ol>
1.90 avankest 532:
1.185 avankest 533: <p class="note">Authors are encouraged to encode their resources using
534: UTF-8.</p>
1.163 avankest 535:
1.88 avankest 536: <p>The <dfn id="xml-response-entity-body">XML response entity body</dfn> is
1.107 avankest 537: either a <code>Document</code> representing the <span>response entity
1.126 avankest 538: body</span> or <code>null</code>. The XML response entity body is the return
539: value of the following algorithm:</p>
1.90 avankest 540:
1.88 avankest 541: <ol>
1.107 avankest 542: <li><p>If the response entity body is "null" terminate these steps and
543: return <code>null</code>.</p></li>
1.88 avankest 544:
1.103 avankest 545: <li><p>If a <code>Content-Type</code> is present and it does not contain a
546: MIME type (ignoring any parameters) that is <code>text/xml</code>,
1.116 avankest 547: <code>application/xml</code> or ends in <code title="">+xml</code> terminate
548: these steps and return <code>null</code>. (Do not terminate these steps if
549: there is no <code>Content-Type</code> header at all.)</p></li>
1.88 avankest 550:
1.128 avankest 551: <li>
552: <p>Parse the response entity body into a document tree following the
553: rules from the XML specifications. Let the result be <var>parsed
554: document</var>. If this fails (unsupported character encoding, namespace
555: well-formedness error et cetera) terminate these steps return
556: <code>null</code>. [<cite><span>XML</span></cite>]
557: [<cite><span>XMLNS</span></cite>]</p>
1.167 avankest 558:
559: <p class="note">Scripts in the resulting document tree will not be
560: executed, resources referenced will not be loaded and no associated XSLT
561: will be applied.</p>
1.128 avankest 562: </li>
1.88 avankest 563:
1.96 avankest 564: <li><p>Return an object implementing the <code>Document</code>
1.88 avankest 565: interface representing the <var>parsed document</var>.</p></li>
566: </ol>
1.58 avankest 567:
1.5 avankest 568: <dl>
1.131 avankest 569: <dt><dfn id="onreadystatechange"><code>onreadystatechange</code></dfn>
1.39 avankest 570: of type <code>EventListener</code></dt>
1.12 avankest 571:
1.157 avankest 572: <dd><p>This attribute is an <span>event handler DOM attribute</span> and
573: <em class="ct">must</em> be invoked whenever a
1.173 avankest 574: <code>readystatechange</code> event is targeted at the object.</p></dd>
1.12 avankest 575:
1.131 avankest 576: <dt><dfn id="readystate"><code>readyState</code></dfn> of type
1.22 avankest 577: <code>unsigned short</code>, readonly</dt>
1.12 avankest 578:
1.185 avankest 579: <dd><p>On getting, the attribute <em class="ct">must</em> return the
580: value of the constant corresponding to the object's current
581: state.</p></dd>
1.12 avankest 582:
1.131 avankest 583: <dt><dfn id="open" title="open"><code>open(<var>method</var>,
1.22 avankest 584: <var>url</var>, <var>async</var>, <var>user</var>,
585: <var>password</var>)</code></dfn>, method</dt>
1.12 avankest 586:
1.1 avankest 587: <dd>
1.58 avankest 588: <p>When invoked, the user agent <em class="ct">must</em> follow the
1.96 avankest 589: following steps (unless otherwise indicated):</p>
1.58 avankest 590:
591: <ol>
1.156 avankest 592: <li><p>Let <var>stored method</var> be the <var>method</var>
593: argument.</p></li>
1.58 avankest 594:
1.156 avankest 595: <li><p>If <var>stored method</var> does not match the
596: <dfn><code>Method</code> production</dfn>, defined in section 5.1.1 of
597: RFC 2616, raise a <code>SYNTAX_ERR</code> exception and terminate these
598: steps. [<cite><span>RFC2616</span></cite>]</p></li>
1.58 avankest 599:
1.183 avankest 600: <li>
601: <p>If <var>stored method</var>
602: <span title="case-insensitive match">case-insensitively matches</span>
603: <code>CONNECT</code>, <code>DELETE</code>, <code>GET</code>,
604: <code>HEAD</code>, <code>OPTIONS</code>, <code>POST</code>,
605: <code>PUT</code>, <code>TRACE</code>, or <code>TRACK</code> let
606: <var>stored method</var> be the canonical uppercase form of the
607: matched method name.</p>
608:
609: <p class="note">If it does not match any of the above, it is passed
610: through literally, including in the final request.</p>
611: </li>
1.156 avankest 612: <!-- WebKit (and supposedly Firefox) also uppercase: COPY, INDEX, LOCK,
613: M-POST, MKCOL, MOVE, PROPFIND, PROPPATCH, and UNLOCK. -->
1.58 avankest 614:
1.176 avankest 615: <li>
616: <p>If <var>stored method</var> is one of <code>CONNECT</code>,
617: <code>TRACE</code>, or <code>TRACK</code> the user agent
618: <em class="ct">should</em> raise a <code>SECURITY_ERR</code> exception
619: and terminate these steps.</p>
1.189 ! avankest 620:
1.176 avankest 621: <p class="note"><code>TRACK</code> poses a security issue to legacy
622: server deployments.</p>
623: </li>
1.58 avankest 624:
1.187 avankest 625: <li><p>If <var>stored url</var> is a relative reference as defined by
1.189 ! avankest 626: RFC 3987, resolve it using
1.96 avankest 627: the current value of the <code>baseURI</code> attribute of the
1.157 avankest 628: <span><code>Document</code> pointer</span>. If this fails raise a
1.187 avankest 629: <code>SYNTAX_ERR</code> exception and terminate these steps.
630: [<cite><span>RFC3987</span></cite>]</p></li>
631:
632: <li><p>Drop the fragment identifier (if any) from <var>url</var> and
633: let <var>stored url</var> be the result of that operation.</p></li>
1.58 avankest 634:
1.101 avankest 635: <li><p>If <var>stored url</var> contains an unsupported scheme raise a
636: <code>NOT_SUPPORTED_ERR</code> and terminate these steps.</p></li>
1.110 avankest 637:
1.58 avankest 638: <li><p>If the <code>"user:password"</code> format in the
1.141 avankest 639: <code>userinfo</code> production defined in section 3.2.1 of RFC 3986
640: is not supported for the relevant scheme and <var>stored url</var>
641: contains this format raise a <code>SYNTAX_ERR</code> and terminate
642: these steps. [<cite><span>RFC3986</span></cite>]</p></li>
1.58 avankest 643:
644: <li><p>If <var>stored url</var> contains the <code>"user:password"</code>
645: format let <var>stored user</var> be the user part and <var>stored
646: password</var> be the password part.</p></li>
647:
648: <li><p>If <var>stored url</var> just contains the <code>"user"</code>
649: format let <var>stored user</var> be the user part.</p></li>
650:
1.184 avankest 651: <li><p>If <var>stored url</var> is not of the <span>same origin</span>
1.157 avankest 652: as the <span>origin</span> of the <span><code>Document</code>
653: pointer</span> the user agent <em class="ct">should</em> raise a
654: <code>SECURITY_ERR</code> exception and terminate these steps.</p></li>
1.58 avankest 655:
1.145 avankest 656: <li><p>Let <var>async</var> be the value of the <var>async</var>
657: argument or <code>true</code> if it was omitted.</p></li>
1.58 avankest 658:
1.126 avankest 659: <li><p>If the <var>user</var> argument was not omitted, and its syntax
1.145 avankest 660: does not match that specified by the relevant authentication scheme,
661: raise a <code>SYNTAX_ERR</code> exception and terminate these
662: steps.</p></li>
1.14 avankest 663:
1.58 avankest 664: <li>
665: <p>If the <var>user</var> argument was not omitted and is not
1.145 avankest 666: <code>null</code> let <var>stored user</var> be <var>user</var>
667: encoded using the encoding specified in the relevant authentication
668: scheme or UTF-8 if the scheme fails to specify an encoding.</p>
1.14 avankest 669:
1.58 avankest 670: <p class="note">This step overrides any user that may have been set by
671: the <var>url</var> argument.</p>
672: </li>
1.16 avankest 673:
1.58 avankest 674: <li><p>If the <var>user</var> argument was not omitted and is
675: <code>null</code> remove <var>stored user</var>.</p></li>
1.14 avankest 676:
1.145 avankest 677: <li><p>If the <var>password</var> argument was not omitted and its
678: syntax does not match that specified by the relevant authentication
679: scheme raise a <code>SYNTAX_ERR</code> exception and terminate these
680: steps.</p></li>
1.58 avankest 681:
682: <li><p>If the <var>password</var> argument was not omitted and is not
683: <code>null</code> let <var>stored password</var> be <var>password</var>
684: encoded using the encoding specified in the relevant authentication
685: scheme or UTF-8 if the scheme fails to specify an encoding.</p></li>
686:
687: <li><p>If the <var>password</var> argument was not omitted and is
688: <code>null</code> remove <var>stored password</var>.</p></li>
689:
1.175 avankest 690: <li>
691: <p><span title="abort send()">Abort the <code>send()</code>
692: algorithm</span>, set <span>response entity body</span> to "null" and
1.189 ! avankest 693: empty the list of <span>author request headers</span>.</p>
1.175 avankest 694:
695: <p class="note">This step and the next only has effect if
696: <code>send()</code> and/or <code>setRequestHeader()</code> has been
697: used.</p>
698: </li>
1.58 avankest 699:
1.108 avankest 700: <li><p>The user agent <em class="ct">should</em> cancel any network
701: activity for which the object is responsible.</p></li>
1.58 avankest 702: <!-- we can hardly require it... -->
703:
1.145 avankest 704: <li><p>Switch the object to the
705: <span title="OPENED state">OPENED</span> state, set the
706: <span><code>send()</code> flag</span> to "false" and then synchronously
707: dispatch a <code>readystatechange</code> event on the object and return
708: the method call.</p></li>
1.58 avankest 709: </ol>
1.14 avankest 710:
1.19 avankest 711: <p class="note">A future version or extension of this specification will
1.33 avankest 712: most likely define a way of doing cross-site requests.</p>
1.1 avankest 713: </dd>
1.12 avankest 714:
1.131 avankest 715: <dt><dfn id="setrequestheader" title="setrequestheader"><code>setRequestHeader(<var>header</var>,
1.22 avankest 716: <var>value</var>)</code></dfn>, method</dt>
1.12 avankest 717:
1.5 avankest 718: <dd>
1.184 avankest 719: <p>
720: The object has an associated list of <dfn id="author-request-headers">author request headers</dfn>
721: consisting of HTTP header name/value pairs. The
722: <code>setRequestHeader()</code> method can be used to set new request
723: headers and append to request headers already in the list.</p>
724:
725: <p>As indicated in the algorithm below certain headers cannot be
726: set and are left up to the user agent. In addition there are certain
727: other headers the user agent will take control of if they are not set by
728: the author as indicated at the end of the <code>send()</code> method
729: section.</p>
1.163 avankest 730:
731: <p class="note">The <code>setRequestHeader()</code> method appends a
1.189 ! avankest 732: value if the HTTP header given as argument is already part of the
! 733: <span>author request headers</span> list.</p>
1.45 avankest 734:
1.58 avankest 735: <p>When invoked, the user agent <em class="ct">must</em> follow the
1.96 avankest 736: following steps (unless otherwise indicated):</p>
1.14 avankest 737:
1.58 avankest 738: <ol>
739: <li><p>If the state of the object is not
1.134 avankest 740: <span title="OPENED state">OPENED</span> raise an
1.98 avankest 741: <code>INVALID_STATE_ERR</code> exception and terminate these
742: steps.</p></li>
1.96 avankest 743:
744: <li><p>If the <span><code>send()</code> flag</span> is "true" raise an
1.98 avankest 745: <code>INVALID_STATE_ERR</code> exception and terminate these
746: steps.</p></li>
1.14 avankest 747:
1.97 avankest 748: <li><p>If the <var>header</var> argument does not match the
1.22 avankest 749: <dfn><code>field-name</code> production</dfn> as defined by section 4.2
1.181 avankest 750: of RFC 2616 raise a <code>SYNTAX_ERR</code> exception and terminate
751: these steps. [<cite><span>RFC2616</span></cite>]</p></li>
1.79 avankest 752:
1.178 avankest 753: <li>
754: <p>If the <var>value</var> argument does not match the
755: <dfn><code>field-value</code> production</dfn> as defined by section
756: 4.2 of RFC 2616 raise a <code>SYNTAX_ERR</code> and terminate these
757: steps. [<cite><span>RFC2616</span></cite>]</p>
758:
1.184 avankest 759: <p class="note">The empty string is legal and represents the empty
760: header value.</p>
1.178 avankest 761: </li>
1.14 avankest 762:
1.32 avankest 763: <li>
1.132 avankest 764: <p>For security reasons, these steps <em class="ct">should</em> be
1.98 avankest 765: terminated if the <var>header</var> argument
1.80 avankest 766: <span title="case-insensitive match">case-insensitively matches</span>
767: one of the following headers:</p>
1.58 avankest 768:
1.32 avankest 769: <ul>
770: <li><code>Accept-Charset</code></li>
771: <li><code>Accept-Encoding</code></li>
1.176 avankest 772: <li><code>Authorization</code></li>
1.68 avankest 773: <li><code>Connection</code></li>
1.32 avankest 774: <li><code>Content-Length</code></li>
1.176 avankest 775: <li><code>Cookie</code></li>
776: <li><code>Cookie2</code></li>
1.68 avankest 777: <li><code>Content-Transfer-Encoding</code></li>
778: <li><code>Date</code></li>
1.32 avankest 779: <li><code>Expect</code></li>
780: <li><code>Host</code></li>
781: <li><code>Keep-Alive</code></li>
782: <li><code>Referer</code></li>
783: <li><code>TE</code></li>
784: <li><code>Trailer</code></li>
785: <li><code>Transfer-Encoding</code></li>
786: <li><code>Upgrade</code></li>
1.184 avankest 787: <li><code>User-Agent</code></li>
1.68 avankest 788: <li><code>Via</code></li>
1.32 avankest 789: </ul>
1.189 ! avankest 790:
1.184 avankest 791: <p>… or if the start of the <var>header</var> argument
792: <span title="case-insensitive match">case-insensitively matches</span>
793: <code>Proxy-</code> or <code>Sec-</code> (including when the argument
794: is just <code>Proxy-</code> or <code>Sec-</code>).</p>
795:
796: <p class="note">The above headers are not allowed to be set as they
797: are better controlled by the user agent as it knows best what value
798: they should have. Header names starting with <code>Sec-</code> are not
799: allowed to be set to allow new headers to be minted in the future that
800: are guaranteed not to come from <code>XMLHttpRequest</code>. (Older
801: clients would however still be vulnerable as they allow such headers
802: to be set.)</p>
1.32 avankest 803: </li>
1.5 avankest 804:
1.184 avankest 805: <li><p>If the <var>header</var> argument is not in the <span>author request
806: headers</span> list append the <var>header</var> with its associated <var>value</var>
1.98 avankest 807: to the list and terminate these steps.</p></li>
1.58 avankest 808:
1.184 avankest 809: <li><p>If the <var>header</var> argument is in the <span>author request
810: headers</span> list either use multiple headers, combine the values or use a
1.96 avankest 811: combination of those (section 4.2, RFC 2616).
812: [<cite><span>RFC2616</span></cite>]</p></li>
813: <!-- XXX it seems UAs always combine the values -->
1.58 avankest 814: </ol>
1.45 avankest 815:
816: <p class="note">See also the <code>send()</code> method regarding user
1.71 avankest 817: agent header handling for caching, authentication, proxies, and
818: cookies.</p>
1.14 avankest 819:
820: <div class="example">
1.58 avankest 821: <pre><code>// The following script:
1.14 avankest 822: var client = new XMLHttpRequest();
823: client.open('GET', 'demo.cgi');
824: client.setRequestHeader('X-Test', 'one');
825: client.setRequestHeader('X-Test', 'two');
826: client.send();
827:
828: // ...would result in the following header being sent:
829: ...
830: X-Test: one, two
1.58 avankest 831: ...</code></pre>
1.14 avankest 832: </div>
1.5 avankest 833: </dd>
1.12 avankest 834:
1.131 avankest 835: <dt><dfn id="send" title="send"><code>send(<var>data</var>)</code></dfn>,
1.22 avankest 836: method</dt>
1.12 avankest 837:
1.17 avankest 838: <dd>
1.58 avankest 839: <p>The <code>send()</code> method initiates the request and its optional
1.163 avankest 840: argument provides the <span>entity body</span>.</p>
1.181 avankest 841:
1.163 avankest 842: <p class="note">Authors are encouraged to ensure that they have
843: specified the <code>Content-Type</code> header via
844: <code>setRequestHeader()</code> before invoking <code>send()</code> with
845: a non-<code>null</code> <var>data</var> argument.</p>
1.58 avankest 846:
847: <p>When invoked, the user agent <em class="ct">must</em> follow the
1.108 avankest 848: following steps (unless otherwise noted). Note that this algorithm might
1.126 avankest 849: get aborted if the <code>open()</code> or <code>abort()</code> method is
850: invoked. When the
1.109 avankest 851: <dfn title="abort send()" id="abort-send-algorithm"><code>send()</code>
1.110 avankest 852: algorithm is aborted</dfn> the user agent <em class="ct">must</em>
853: terminate the algorithm after finishing the step it is on.</p>
854:
1.184 avankest 855: <p class="note">The following algorithm cannot be aborted through
856: script when <var>async</var> is <code>false</code>. It can only be
857: aborted when <var>async</var> is <code>true</code> and only after the
858: method call has returned.</p>
1.58 avankest 859:
860: <ol>
861: <li><p>If the state of the object is not
1.134 avankest 862: <span title="OPENED state">OPENED</span> raise an
1.98 avankest 863: <code>INVALID_STATE_ERR</code> exception and terminate these
864: steps.</p></li>
1.96 avankest 865:
866: <li><p>If the <span><code>send()</code> flag</span> is "true" raise an
1.98 avankest 867: <code>INVALID_STATE_ERR</code> exception and terminate these
868: steps.</p></li>
1.58 avankest 869:
1.102 avankest 870: <li><p>If <var>async</var> is <code>true</code> set the
1.103 avankest 871: <span><code>send()</code> flag</span> to "true".</p></li>
872:
1.58 avankest 873: <li>
1.183 avankest 874: <p>If <var>stored method</var> is <code>GET</code> or
875: <code>HEAD</code> act as if the
1.166 avankest 876: <var>data</var> argument is <code>null</code>.</p>
1.181 avankest 877:
1.58 avankest 878: <p>If the <var>data</var> argument has not been omitted and is not
1.145 avankest 879: <code>null</code> use it for the <dfn id="entity-body">entity
880: body</dfn> as defined by section 7.2 of RFC 2616 observing the
881: following rules: [<cite><span>RFC2616</span></cite>]</p>
1.58 avankest 882:
1.119 avankest 883: <dl class="switch">
1.58 avankest 884: <dt><var>data</var> is a <code>DOMString</code></dt>
885:
1.163 avankest 886: <dd>
887: <p>Encode <var>data</var> using UTF-8 for transmission.</p>
888:
1.164 avankest 889: <p>If a <code>Content-Type</code> header is set using
890: <code>setRequestHeader()</code> set the <code>charset</code>
891: parameter of that header to <code>UTF-8</code>.</p>
1.163 avankest 892: </dd>
1.58 avankest 893:
894: <dt><var>data</var> is a <code>Document</code>
895:
896: <dd>
1.181 avankest 897: <p>Let <var>data</var> be <code><var>data</var>.innerHTML</code> as
1.182 avankest 898: defined by section 2.5 of HTML 5. Encode it using
1.183 avankest 899: <code><var>data</var>.inputEncoding</code> or UTF-8 if
900: <code><var>data</var>.inputEncoding</code> is
1.181 avankest 901: <code>null</code>. Re-raise any exceptions the
902: <code><var>data</var>.innerHTML</code> getter algorithm raises.
903: [<cite><span>HTML5</span></cite>]</p>
1.183 avankest 904:
1.181 avankest 905: <p class="note">If the document cannot be serialized the
906: <code>document.innerHTML</code> algorithm raises an
907: <code>INVALID_STATE_ERR</code> exception.</p>
1.183 avankest 908:
1.165 avankest 909: <p>If no <code>Content-Type</code> header has been set using
1.175 avankest 910: <code>setRequestHeader()</code> set a <code>Content-Type</code>
911: request header with a value of
1.165 avankest 912: <code>application/xml;charset=<var>charset</var></code> where
913: <var>charset</var> is the encoding used to encode the document.</p>
1.58 avankest 914:
915: <p class="note">Subsequent changes to the <code>Document</code> have
916: no effect on what is submitted.</p>
917: </dd>
918:
919: <dt><var>data</var> is not a <code>DOMString</code> or
920: <code>Document</code></dt>
921:
1.96 avankest 922: <dd><p>Use the stringification mechanisms of the host language on
923: <var>data</var> and treat the result as if <var>data</var> is a
1.166 avankest 924: <code>DOMString</code>. Or, if this fails, act as if the
925: <var>data</var> argument is <code>null</code>.</p></dd>
1.58 avankest 926: </dl>
927:
1.126 avankest 928: <p>If the <var>data</var> argument has been omitted, or is
929: <code>null</code>, no entity body is used in the request.</p>
1.58 avankest 930: </li>
931:
1.71 avankest 932: <li><p>Make a request to <var>stored url</var>, using HTTP method
933: <var>stored method</var>, user <var>stored user</var> (if provided) and
934: password <var>stored password</var> (if provided), taking into account
1.184 avankest 935: the entity body, list of <span>author request headers</span> and the
936: rules listed directly after this set of steps.</p></li>
1.60 avankest 937:
1.67 avankest 938: <li>
1.96 avankest 939: <p>Synchronously dispatch a <code>readystatechange</code> event on the
940: object.</p>
1.67 avankest 941:
1.96 avankest 942: <p class="note">The state of the object does not change. The event is
943: dispatched for historical reasons.</p>
1.67 avankest 944: </li>
945:
1.102 avankest 946: <li><p>If <var>async</var> is <code>true</code> return the
1.98 avankest 947: <code>send()</code> method call. (Do not terminate the steps in the
948: algorithm though.)</p></li>
1.58 avankest 949:
1.117 avankest 950: <li>
1.175 avankest 951: <p>While executing the request the following rules are to be
1.123 avankest 952: observed.</p>
953:
1.119 avankest 954: <dl class="switch">
1.118 avankest 955: <dt>If the response is an HTTP redirect</dt>
1.167 avankest 956:
1.118 avankest 957: <dd>
1.145 avankest 958: <p>If the redirect does not violate security (it is
1.184 avankest 959: <span>same origin</span> for instance) or infinite loop precautions
1.145 avankest 960: and the scheme is supported transparently follow the redirect and go
1.166 avankest 961: to the start of this step (step 8).</p>
1.145 avankest 962:
963: <p class="note">HTTP places requirements on the user agent regarding
964: the preservation of the request method and entity body during
965: redirects, and also requires users to be notified of certain kinds
966: of automatic redirections.</p>
1.118 avankest 967: <!-- Arguably HTTP should be fixed for the latter case. No browser
968: follows that as far as I know. -->
969:
970: <p>Otherwise, follow the following set of steps:</p>
1.145 avankest 971:
1.118 avankest 972: <ol>
1.124 avankest 973: <li><p>Set the <span>response entity body</span> to "null", the
1.184 avankest 974: <span>error flag</span> to "true" and empty the list of
975: <span>author request headers</span>.</p></li>
1.118 avankest 976:
977: <li><p>Synchronously switch the state to
978: <span title="DONE state">DONE</span>.</p></li>
979:
980: <li><p>If <var>async</var> is set to <code>false</code> raise a
981: <code>NETWORK_ERR</code> exception and terminate the overall
982: algorithm.</p></li>
983:
984: <li><p>Synchronously dispatch a <code>readystatechange</code> event on
985: the object.</p></li>
986:
987: <li><p>Terminate the overall algorithm.</p></li>
988: </ol>
989:
990: <p class="note">It is likely that a future version of the
991: <code>XMLHttpRequest</code> object will dispatch an <code>error</code>
992: event here as well.</p>
993: </dd>
1.117 avankest 994:
1.121 avankest 995:
1.118 avankest 996: <dt>If the user cancels the download</dt>
1.58 avankest 997:
1.118 avankest 998: <dd>
999: <p>Run the following set of steps:</p>
1.60 avankest 1000:
1.118 avankest 1001: <ol>
1.124 avankest 1002: <li><p>Set the <span>response entity body</span> to "null", the
1.184 avankest 1003: <span>error flag</span> to "true" and empty the list of
1004: <span>author request headers</span>.</p></li>
1.118 avankest 1005:
1006: <li><p>Synchronously switch the state to
1007: <span title="DONE state">DONE</span>.</p></li>
1008:
1.121 avankest 1009: <li><p>If <var>async</var> is set to <code>false</code> raise an
1010: <code>ABORT_ERR</code> exception and terminate the overall
1.118 avankest 1011: algorithm.</p></li>
1012:
1013: <li><p>Synchronously dispatch a <code>readystatechange</code> event on
1014: the object.</p></li>
1015:
1016: <li><p>Terminate the overall algorithm.</p></li>
1017: </ol>
1.121 avankest 1018:
1.118 avankest 1019: <p class="note">It is likely that a future version of the
1.121 avankest 1020: <code>XMLHttpRequest</code> object will dispatch an
1021: <code title="">abort</code> event here as well.</p>
1.118 avankest 1022: </dd>
1.60 avankest 1023:
1.121 avankest 1024:
1.118 avankest 1025: <dt>In case of network errors</dt>
1.60 avankest 1026:
1.118 avankest 1027: <dd>
1.176 avankest 1028: <p>In case of DNS errors, timeout, TLS negotiation failure, or other
1.186 avankest 1029: type of network errors, do not request user interaction and run the
1030: following set of steps:</p>
1031:
1032: <p class="note">This does not include HTTP responses that
1033: indicate some type of error, such as HTTP status code 410.</p>
1.118 avankest 1034:
1035: <ol>
1.124 avankest 1036: <li><p>Set the <span>response entity body</span> to "null", the
1.184 avankest 1037: <span>error flag</span> to "true" and empty the list of
1038: <span>author request headers</span>.</p></li>
1.118 avankest 1039:
1040: <li><p>Synchronously switch the state to
1041: <span title="DONE state">DONE</span>.</p></li>
1042:
1043: <li><p>If <var>async</var> is set to <code>false</code> raise a
1044: <code>NETWORK_ERR</code> exception and terminate the overall
1045: algorithm.</p></li>
1046:
1047: <li><p>Synchronously dispatch a <code>readystatechange</code> event on
1048: the object.</p></li>
1049:
1050: <li><p>Terminate the overall algorithm.</p></li>
1051: </ol>
1052:
1053: <p class="note">It is likely that a future version of the
1054: <code>XMLHttpRequest</code> object will dispatch an <code>error</code>
1055: event here as well.</p>
1056: </dd>
1057:
1058: <dt>Once all HTTP headers have been received</dt>
1059:
1060: <dd>
1061: <p>If all HTTP headers have been received, before receiving the message
1.123 avankest 1062: body (if any), run the following steps:</p>
1.60 avankest 1063:
1.118 avankest 1064: <ol>
1065: <li><p>Synchronously switch the state to
1.123 avankest 1066: <span title="HEADERS_RECEIVED state">HEADERS_RECEIVED</span>.</p></li>
1.118 avankest 1067:
1068: <li><p>Synchronously dispatch a <code>readystatechange</code> event on
1069: the object.</p></li>
1.123 avankest 1070: </ol>
1071: </dd>
1072:
1073: <dt>Once the first byte (or more) of the response entity body has been
1074: received</dt>
1075: <dt>If there is no response entity body</dt>
1.153 avankest 1076:
1.123 avankest 1077: <dd>
1078: <ol>
1.118 avankest 1079: <li><p>Synchronously switch the state to
1080: <span title="LOADING state">LOADING</span>.</p></li>
1081:
1082: <li><p>Synchronously dispatch a <code>readystatechange</code> event on
1083: the object.</p></li>
1084: </ol>
1085: </dd>
1086: </dl>
1.153 avankest 1087:
1.124 avankest 1088: <p>Finally, once the complete resource has been downloaded go to the next
1.118 avankest 1089: step.</p>
1.58 avankest 1090: </li>
1091:
1.82 avankest 1092: <li><p>When the request has successfully completed loading, synchronously
1.96 avankest 1093: switch the state to <span title="DONE state">DONE</span> and then
1094: synchronously dispatch a <code>readystatechange</code> event on the
1095: object and return the method call in case of <var>async</var> being
1096: <code>false</code>.</p></li>
1.58 avankest 1097: </ol>
1.14 avankest 1098:
1.91 avankest 1099: <p>If the user agent allows the user to configure a proxy it
1.22 avankest 1100: <em class="ct">should</em> modify the request appropriately;
1.42 avankest 1101: <abbr title="in other words">i.e.</abbr>, connect to the proxy host
1102: instead of the origin server, modify the <code>Request-Line</code> and
1103: send <code>Proxy-Authorization</code> headers as specified.</p>
1.12 avankest 1104:
1.42 avankest 1105: <p>If the user agent supports HTTP Authentication it
1.184 avankest 1106: <em class="ct">should</em> consider requests originating from this
1107: object to be part of the protection space that includes the accessed
1108: URIs and send <code>Authorization</code> headers and handle <code>401
1109: Unauthorized</code> requests appropriately. If authentication fails,
1.185 avankest 1110: and <var>stored user</var> and <var>stored password</var> are not
1111: provided, user agents <em class="ct">should</em> prompt the users for
1112: credentials.
1.42 avankest 1113: [<cite><span>RFC2617</span></cite>]</p>
1114:
1.185 avankest 1115: <p class="note">Users are not prompted if credentials are provided
1116: through the <code>open()</code> API so that authors can implement their
1117: own user interface.</p>
1118:
1.57 avankest 1119: <p>If the user agent supports HTTP State Management it
1.42 avankest 1120: <em class="ct">should</em> persist, discard and send cookies (as received
1121: in the <code>Set-Cookie</code> and <code>Set-Cookie2</code> response
1122: headers, and sent in the <code>Cookie</code> header) as applicable.
1.178 avankest 1123: [<cite><span>RFC2109</span></cite>]
1.42 avankest 1124: [<cite><span>RFC2965</span></cite>]</p>
1125:
1.178 avankest 1126: <!-- These specs do not match reality. -->
1.163 avankest 1127:
1.42 avankest 1128: <p>If the user agent implements a HTTP cache it <em class="ct">should</em>
1.184 avankest 1129: respect <code>Cache-Control</code> request headers set by
1130: <code>setRequestHeader()</code> (e.g., <code>Cache-Control: no-cache</code>
1131: bypasses the cache). It <em class="ct">must not</em> send
1.42 avankest 1132: <code>Cache-Control</code> or <code>Pragma</code> request headers
1.137 avankest 1133: automatically unless the user explicitly requests such behavior
1.179 avankest 1134: (<abbr>e.g.</abbr>, by (force-)reloading the page).</p>
1.184 avankest 1135:
1.179 avankest 1136: <p>For <code>304 Not Modified</code> responses that are a result of a
1137: user agent generated conditional request the user agent
1138: <em class="ct">must</em> act as if the server gave a <code>200
1139: OK</code> response with the appropriate content. The user agent
1.184 avankest 1140: <em class="ct">must</em> allow <code>setRequestHeader()</code> to
1141: override automatic cache validation by setting request headers (e.g.,
1142: <code>If-None-Match</code>, <code>If-Modified-Since</code>), in which
1143: case <code>304 Not Modified</code> responses <em class="ct">must</em> be
1144: passed through. [<cite><span>RFC2616</span></cite>]</p>
1.12 avankest 1145:
1.8 avankest 1146: <p>If the user agent implements server-driven content-negotiation
1.161 avankest 1147: it <em class="ct">should</em> set <code>Accept-Encoding</code> and
1.174 avankest 1148: <code>Accept-Charset</code> headers as appropriate.
1149: Unless set through <code>setRequestHeader()</code> user agents
1150: <em class="ct">should</em> set the <code>Accept</code> and
1.180 avankest 1151: <code>Accept-Language</code> headers as well. If <code>Accept</code> is
1152: set by the user agent it <em class="ct">must</em> have the value
1153: <code>*/*</code>. Responses <em class="ct">must</em> have the
1154: content-encodings automatically decoded.
1155: [<cite><span>RFC2616</span></cite>]</p>
1.184 avankest 1156:
1.185 avankest 1157: <p>Besides the <span>author request headers</span> user agents
1158: <em class="ct">should not</em> include additional request headers other
1159: than those mentioned above or other than those authors are not allowed
1160: to set using <code>setRequestHeader()</code>. This ensures that authors
1161: have a reasonably predictable API.</p>
1.8 avankest 1162: </dd>
1.12 avankest 1163:
1.131 avankest 1164: <dt><dfn id="abort"><code>abort()</code></dfn>, method</dt>
1.12 avankest 1165:
1.5 avankest 1166: <dd>
1.60 avankest 1167: <p>When invoked, the user agent <em class="ct">must</em> run the following
1.96 avankest 1168: steps (unless otherwise noted):</p>
1.60 avankest 1169:
1170: <ol>
1.108 avankest 1171: <li><p><span title="abort send()">Abort the <code>send()</code>
1172: algorithm</span>, set the <span>response entity body</span> to "null",
1.135 avankest 1173: the <span>error flag</span> to "true" and remove any registered request
1174: headers.</p></li>
1.60 avankest 1175:
1.108 avankest 1176: <li><p>The user agent <em class="ct">should</em> cancel any network
1177: activity for which the object is responsible.</p></li>
1.60 avankest 1178:
1.83 avankest 1179: <li>
1.85 avankest 1180: <p>If the state is <span title="UNSENT state">UNSENT</span>,
1.134 avankest 1181: <span title="OPENED state">OPENED</span> and the <span><code>send()</code>
1.87 avankest 1182: flag</span> is "false", or <span title="DONE state">DONE</span> go to
1183: the next step.</p>
1.85 avankest 1184:
1.135 avankest 1185: <p>Otherwise, switch the state to
1186: <span title="DONE state">DONE</span>, set the
1187: <span><code>send()</code> flag</span> to "false" and synchronously
1188: dispatch a <code>readystatechange</code> event on the object.</p>
1.83 avankest 1189: </li>
1.67 avankest 1190:
1.60 avankest 1191: <li>
1.97 avankest 1192: <p>Switch the state to <span title="UNSENT state">UNSENT</span>. (Do not
1.71 avankest 1193: dispatch the <code>readystatechange</code> event.)</p>
1.60 avankest 1194:
1.82 avankest 1195: <p class="note">It is likely that a future version of the
1196: <code>XMLHttpRequest</code> object will dispatch an
1197: <code title="">abort</code> event here as well.</p>
1.60 avankest 1198: </li>
1199: </ol>
1.5 avankest 1200: </dd>
1.12 avankest 1201:
1.131 avankest 1202: <dt><dfn id="getallresponseheaders"><code>getAllResponseHeaders()</code></dfn>,
1.22 avankest 1203: method</dt>
1.12 avankest 1204:
1.5 avankest 1205: <dd>
1.60 avankest 1206: <p>When invoked, the user agent <em class="ct">must</em> run
1.58 avankest 1207: the following steps:</p>
1208:
1209: <ol>
1.124 avankest 1210: <li><p>If the state is <span title="UNSENT state">UNSENT</span> or
1.134 avankest 1211: <span title="OPENED state">OPENED</span> raise an
1.98 avankest 1212: <code>INVALID_STATE_ERR</code> exception and terminate these
1213: steps.</p></li>
1.170 avankest 1214:
1215: <li><p>If the <span>error flag</span> is "true" return the empty string
1.124 avankest 1216: and terminate these steps.</p></li>
1.96 avankest 1217:
1.167 avankest 1218: <li><p>Return all the HTTP headers, as a single string, with each
1219: header line separated by a U+000D (CR) U+000A (LF) pair excluding the
1220: status line.</p></li>
1.58 avankest 1221: </ol>
1.24 avankest 1222:
1.5 avankest 1223: <div class="example">
1.58 avankest 1224: <pre><code>// The following script:
1.5 avankest 1225: var client = new XMLHttpRequest();
1.14 avankest 1226: client.open("GET", "test.txt", true);
1.5 avankest 1227: client.send();
1.12 avankest 1228: client.onreadystatechange = function() {
1.179 avankest 1229: if(this.readyState == 2) {
1.12 avankest 1230: print(this.getAllResponseHeaders());
1231: }
1232: }
1.5 avankest 1233:
1234: // ...should output something similar to the following text:
1235: Date: 2004年10月24日 04:58:38 GMT
1236: Server: Apache/1.3.31 (Unix)
1237: Keep-Alive: timeout=15, max=99
1238: Connection: Keep-Alive
1239: Transfer-Encoding: chunked
1.58 avankest 1240: Content-Type: text/plain; charset=utf-8</code></pre>
1.5 avankest 1241: </div>
1242: </dd>
1.12 avankest 1243:
1.131 avankest 1244: <dt><dfn id="getresponseheader" title="getresponseheader"><code>getResponseHeader(<var>header</var>)</code></dfn>,
1.22 avankest 1245: method</dt>
1.12 avankest 1246:
1.1 avankest 1247: <dd>
1.58 avankest 1248: <p>When the method is invoked, the user agent <em class="ct">must</em> run
1249: the following steps:</p>
1.14 avankest 1250:
1.58 avankest 1251: <ol>
1.124 avankest 1252: <li><p>If the state is <span title="UNSENT state">UNSENT</span> or
1.134 avankest 1253: <span title="OPENED state">OPENED</span> raise an
1.98 avankest 1254: <code>INVALID_STATE_ERR</code> exception and terminate these
1255: steps.</p></li>
1.58 avankest 1256:
1.149 avankest 1257: <li><p>If the <var>header</var> argument does not match the
1.171 avankest 1258: <span><code>field-name</code> production</span> return
1259: <code>null</code> and terminate these steps.</p></li>
1.124 avankest 1260:
1.149 avankest 1261: <li><p>If the <span>error flag</span> is "true" return
1262: <code>null</code> and terminate these steps.</p></li>
1.58 avankest 1263:
1.80 avankest 1264: <li><p>If the <var>header</var> argument
1265: <span title="case-insensitive match">case-insensitively matches</span>
1.127 avankest 1266: multiple HTTP headers for the last request sent, return the values of
1.149 avankest 1267: these headers as a single concatenated string separated from each
1.167 avankest 1268: other by an U+002C followed by an U+0020 character and terminate
1.149 avankest 1269: these steps.</p></li>
1.58 avankest 1270:
1.80 avankest 1271: <li><p>If the <var>header</var> argument
1.149 avankest 1272: <span title="case-insensitive match">case-insensitively matches</span>
1273: a single HTTP header for the last request sent return the value of
1274: that header and terminate these steps.</p></li>
1.58 avankest 1275:
1.96 avankest 1276: <li><p>Return <code>null</code>.</p></li>
1.58 avankest 1277: </ol>
1.12 avankest 1278:
1.1 avankest 1279: <div class="example">
1.58 avankest 1280: <pre><code>// The following script:
1.1 avankest 1281: var client = new XMLHttpRequest();
1.14 avankest 1282: client.open("GET", "test.txt", true);
1.5 avankest 1283: client.send();
1.12 avankest 1284: client.onreadystatechange = function() {
1.179 avankest 1285: if(this.readyState == 2) {
1.14 avankest 1286: print(client.getResponseHeader("Content-Type"));
1.12 avankest 1287: }
1288: }
1.1 avankest 1289:
1.5 avankest 1290: // ...should output something similar to the following text:
1.163 avankest 1291: text/plain; charset=utf-8</code></pre>
1.1 avankest 1292: </div>
1.5 avankest 1293: </dd>
1.12 avankest 1294:
1.131 avankest 1295: <dt><dfn id="responsetext"><code>responseText</code></dfn> of type
1.22 avankest 1296: <code>DOMString</code>, readonly</dt>
1.12 avankest 1297:
1.5 avankest 1298: <dd>
1.88 avankest 1299: <p>On getting, the user agent <em class="ct">must</em> run the following
1300: steps:</p>
1301:
1302: <ol>
1.169 avankest 1303: <li><p>If the state is not <span title="LOADING state">LOADING</span>
1304: or <span title="DONE state">DONE</span> return the empty string and
1305: terminate these steps.</p></li>
1.12 avankest 1306:
1.88 avankest 1307: <li><p>Return the <span>text response entity body</span>.</p></li>
1308: </ol>
1.5 avankest 1309: </dd>
1.12 avankest 1310:
1.131 avankest 1311: <dt><dfn id="responsexml"><code>responseXML</code></dfn> of type
1.22 avankest 1312: <code>Document</code>, readonly</dt>
1.12 avankest 1313:
1.8 avankest 1314: <dd>
1.75 avankest 1315: <p>On getting, the user agent <em class="ct">must</em> run the following
1316: steps:</p>
1.79 avankest 1317:
1.75 avankest 1318: <ol>
1.169 avankest 1319: <li><p>If the state is not <span title="DONE state">DONE</span> return
1320: <code>null</code> and terminate these steps.</p></li>
1.75 avankest 1321:
1.88 avankest 1322: <li><p>Return the <span>XML response entity body</span>.</p></li>
1.75 avankest 1323: </ol>
1.5 avankest 1324: </dd>
1.12 avankest 1325:
1.131 avankest 1326: <dt><dfn id="status"><code>status</code></dfn> of type <code>unsigned
1.22 avankest 1327: short</code>, readonly</dt>
1.12 avankest 1328:
1.5 avankest 1329: <dd>
1.72 avankest 1330: <p>On getting, if available, it <em class="ct">must</em> return the HTTP
1331: status code sent by the server (typically <code>200</code> for a
1332: successful request). Otherwise, if not available, the user agent
1333: <em class="ct">must</em> raise an <code>INVALID_STATE_ERR</code>
1334: exception.</p>
1.12 avankest 1335: </dd>
1336:
1.131 avankest 1337: <dt><dfn id="statustext"><code>statusText</code></dfn> of type
1.22 avankest 1338: <code>DOMString</code>, readonly</dt>
1.12 avankest 1339:
1.5 avankest 1340: <dd>
1.72 avankest 1341: <p>On getting, if available, it <em class="ct">must</em> return the HTTP
1342: status text sent by the server (appears after the status code). Otherwise,
1.179 avankest 1343: if not available (request is not initiated for instance), the user
1344: agent <em class="ct">must</em> raise an <code>INVALID_STATE_ERR</code>
1345: exception.</p>
1.1 avankest 1346: </dd>
1347: </dl>
1.12 avankest 1348:
1.121 avankest 1349:
1.31 avankest 1350: <h3 id="events">Events for the <code title="">XMLHttpRequest</code>
1351: Object</h3>
1.12 avankest 1352:
1.134 avankest 1353: <p>This section describes the various events that can be dispatched on
1354: objects implementing the <code>XMLHttpRequest</code> interface. For this
1.22 avankest 1355: version of the specification only one event is defined.</p>
1.12 avankest 1356:
1.1 avankest 1357: <dl>
1.131 avankest 1358: <dt><dfn id="readystatechange"><code>readystatechange</code></dfn></dt>
1.24 avankest 1359:
1.72 avankest 1360: <dd>When the user agent dispatches a <code title="">readystatechange</code>
1361: event (as indicated above) it <em class="ct">must not</em> bubble,
1362: <em class="ct">must not</em> be cancelable and <em class="ct">must</em>
1363: implement the <code>Event</code> interface. Its <code>namespaceURI</code>
1364: attribute <em class="ct">must</em> be <code>null</code>.
1.155 avankest 1365: [<cite><span>DOM2Events</span></cite>]</dd>
1.1 avankest 1366: </dl>
1.32 avankest 1367:
1.31 avankest 1368: <h3 id="exceptions">Exceptions for the <code title="">XMLHttpRequest</code>
1369: Object</h3>
1.138 avankest 1370:
1371: <p>Several algorithms in this specification may result in an exception
1372: being thrown. These exceptions are all part of the group
1.185 avankest 1373: <code>ExceptionCode</code> and use the <code>DOMException</code> object,
1.138 avankest 1374: which is defined in DOM Level 3 Core. In addition this specification
1375: extends the <code>ExceptionCode</code> group with several new
1376: constants as indicated below. [<cite><span>DOM3Core</span></cite>]</p>
1.31 avankest 1377:
1.138 avankest 1378: <pre class="idl">const unsigned short <span>SECURITY_ERR</span> = 18;
1.121 avankest 1379: const unsigned short <span>NETWORK_ERR</span> = 101;
1380: const unsigned short <span>ABORT_ERR</span> = 102;</pre>
1.31 avankest 1381:
1.138 avankest 1382: <p>The <dfn id="security-err"><code>SECURITY_ERR</code></dfn> exception is
1383: raised if an attempt is made to perform an operation or access some data
1384: in a way that would be a security risk or a violation of the user agent's
1385: security policy.</p>
1386:
1387: <!-- http://lists.w3.org/Archives/Public/public-webapi/2006May/0027.html -->
1388:
1389: <p class="note">The <code title="">SECURITY_ERR</code> exception is
1390: expected to be eventually folded into an update of the the DOM Level 3
1391: Core specification with an equivalent definition and identical constant
1392: value. Until that happens it is defined here to guide implementors. (This
1.153 avankest 1393: is also the reason the constant value is not in line with the other
1.138 avankest 1394: exceptions.)</p>
1395:
1.33 avankest 1396: <p>The <dfn id="network-err"><code>NETWORK_ERR</code></dfn> exception is
1.138 avankest 1397: raised when a network error occurs in synchronous requests.</p>
1.121 avankest 1398:
1.138 avankest 1399: <p>The <dfn id="abort-err"><code>ABORT_ERR</code></dfn> exception is
1400: raised when the user aborts a request in synchronous requests.</p>
1.121 avankest 1401:
1402:
1.29 avankest 1403: <h2 class="no-num" id="notcovered">Not in this Specification</h2>
1404:
1.143 avankest 1405: <p><em>This section is non-normative.</em></p>
1.29 avankest 1406:
1.72 avankest 1407: <p>This specification does not include the following features which are
1408: being considered for a future version of this specification:</p>
1.29 avankest 1409:
1410: <ul>
1411: <li><code>load</code> event and <code>onload</code> attribute;</li>
1412: <li><code>error</code> event and <code>onerror</code> attribute;</li>
1413: <li><code>progress</code> event and <code>onprogress</code> attribute;</li>
1414: <li><code title="">abort</code> event and <code>onabort</code> attribute;</li>
1415: <li>Timers have been suggested, perhaps an <code>ontimeout</code>
1416: attribute;</li>
1417: <li>Property to disable following redirects;</li>
1.30 avankest 1418: <li><code title="">responseXML</code> for <code>text/html</code>
1419: documents;</li>
1.40 avankest 1420: <li>Cross-site <code title="">XMLHttpRequest</code>;</li>
1.87 avankest 1421: <li><code>responseBody</code> to deal with byte streams;</li>
1.114 avankest 1422: <li><code>overrideMimeType</code> to fix up MIME types;</li>
1.87 avankest 1423: <li><code>getRequestHeader()</code> and
1424: <code>removeRequestHeader()</code>.</li>
1.29 avankest 1425: </ul>
1426:
1.1 avankest 1427: <h2 class="no-num" id="bibref">References</h2>
1.177 avankest 1428:
1429: <p>Unless marked "Non-normative" these references are normative.</p>
1.11 avankest 1430:
1.6 avankest 1431: <dl>
1.155 avankest 1432: <dt>[<dfn id="ref-dom2events">DOM2Events</dfn>]</dt>
1433: <dd><cite><a href="http://www.w3.org/TR/DOM-Level-2-Events/">Document
1.160 avankest 1434: Object Model (DOM) Level 2 Events Specification</a></cite>, T. Pixley,
1435: editor. W3C, November 2000.</dd>
1.155 avankest 1436:
1.145 avankest 1437: <dt>[<dfn id="ref-dom3core">DOM3Core</dfn>]</dt>
1.11 avankest 1438: <dd><cite><a href="http://www.w3.org/TR/DOM-Level-3-Core">Document Object
1.92 avankest 1439: Model (DOM) Level 3 Core Specification</a></cite>, A. Le Hors, P. Le
1.139 avankest 1440: Hégaret, L. Wood, G. Nicol, J. Robie, M. Champion, S. Byrne,
1441: editors. W3C, April 2004.</dd>
1.11 avankest 1442:
1.117 avankest 1443: <dt>[<dfn id="ref-ecmascript">ECMAScript</dfn>]</dt>
1.92 avankest 1444: <dd><cite><a href="http://www.ecma-international.org/publications/standards/Ecma-262.htm">ECMAScript
1445: Language Specification</a></cite>, Third Edition. ECMA, December 1999.</dd>
1.171 avankest 1446:
1.145 avankest 1447: <dt>[<dfn id="ref-html5">HTML5</dfn>]</dt>
1.171 avankest 1448: <dd><cite><a href="http://www.w3.org/html/wg/html5/">HTML 5</a></cite>
1449: (work in progress), I. Hickson, D. Hyatt, editors. W3C, 2008.</dd>
1.142 avankest 1450: <dd><cite><a href="http://www.whatwg.org/specs/web-apps/current-work/">HTML 5</a></cite>
1.171 avankest 1451: (work in progress), I. Hickson, editor. WHATWG, 2008.</dd>
1.177 avankest 1452:
1453: <dt>[<dfn id="ref-httponly">HTTPONLY</dfn>]</dt>
1454: <dd>(Non-normative) <cite><a href="http://msdn.microsoft.com/en-us/library/ms533046.aspx">Mitigating
1455: Cross-site Scripting With HTTP-only Cookies</a></cite>, MSDN.</dd>
1.14 avankest 1456:
1.178 avankest 1457: <dt>[<dfn id="ref-rfc2109">RFC2109</dfn>]</dt>
1458:
1459: <dd><cite><a href="http://ietf.org/rfc/rfc2109">HTTP State Management
1460: Mechanism</a></cite>, D. Kristol, L. Montulli, editors. IETF, February
1461: 1997.</dd>
1462:
1.145 avankest 1463: <dt>[<dfn id="ref-rfc2119">RFC2119</dfn>]</dt>
1.117 avankest 1464: <dd><cite><a href="http://ietf.org/rfc/rfc2119">Key words for use in RFCs to
1465: Indicate Requirement Levels</a></cite>, S. Bradner. IETF, March 1997.</dd>
1.12 avankest 1466:
1.145 avankest 1467: <dt>[<dfn id="ref-rfc2616">RFC2616</dfn>]</dt>
1.11 avankest 1468: <dd><cite><a href="http://ietf.org/rfc/rfc2616">Hypertext Transfer Protocol
1.92 avankest 1469: -- HTTP/1.1</a></cite>, R. Fielding, J. Gettys, J. Mogul, H. Frystyk, L.
1470: Masinter, P. Leach, T. Berners-Lee, editors. IETF, June 1999.</dd>
1.12 avankest 1471:
1.37 avankest 1472: <dt>[<dfn id="ref-rfc2617">RFC2617</dfn>]</dt>
1.11 avankest 1473: <dd><cite><a href="http://ietf.org/rfc/rfc2617">HTTP Authentication: Basic
1.92 avankest 1474: and Digest Access Authentication</a></cite>, P. Hallam-Baker, J.
1475: Hostetler, S. Lawrence, P. Leach, A. Luotonen, L. Stewart, editors. IETF,
1476: June 1999.</dd>
1.12 avankest 1477:
1.37 avankest 1478: <dt>[<dfn id="ref-rfc2965">RFC2965</dfn>]</dt>
1.19 avankest 1479: <dd><cite><a href="http://ietf.org/rfc/rfc2965">HTTP State Management
1.92 avankest 1480: Mechanism</a></cite>, D. Kristol, L. Montulli, editors. IETF, October
1481: 2000.</dd>
1.19 avankest 1482:
1.37 avankest 1483: <dt>[<dfn id="ref-rfc3986">RFC3986</dfn>]</dt>
1.11 avankest 1484: <dd><cite><a href="http://ietf.org/rfc/rfc3986">Uniform Resource Identifier
1.92 avankest 1485: (URI): Generic Syntax</a></cite>, T. Berners-Lee, R. Fielding, L. Masinter,
1486: editors. IETF, January 2005.</dd>
1.184 avankest 1487:
1488: <dt>[<dfn id=ref-rfc3987>RFC3987</dfn>]</dt>
1.141 avankest 1489: <dd><cite><a href="http://ietf.org/rfc/rfc3987">Internationalized
1490: Resource Identifiers (IRIs)</a></cite>, M. Duerst, M. Suignard, editors.
1.189 ! avankest 1491: IETF, January 2005.</dd>
1.28 avankest 1492:
1.181 avankest 1493: <dt>[<dfn id="ref-webidl">Web IDL</dfn>]</dt>
1494: <dd><cite><a href="http://dev.w3.org/2006/webapi/Binding4DOM/">Web
1495: IDL</a></cite> (editor's draft), C. McCormack, editor. W3C, 2008.</dd>
1496:
1.92 avankest 1497: <dt>[<dfn id="ref-xml">XML</dfn>]</dt>
1498: <dd><cite><a href="http://www.w3.org/TR/xml/">Extensible Markup Language
1499: (XML) 1.0 (Fourth Edition)</a></cite>, T. Bray, J. Paoli, C.
1.117 avankest 1500: Sperberg-McQueen, E. Maler, F. Yergeau, editors. W3C, September 2006.</dd>
1.41 avankest 1501:
1.92 avankest 1502: <dt>[<dfn id="ref-xmlns">XMLNS</dfn>]</dt>
1503: <dd><cite><a href="http://www.w3.org/TR/xml-names/">Namespaces in XML
1.117 avankest 1504: (Second Edition)</a></cite>, T. Bray, D. Hollander, A. Layman, R. Tobin,
1505: editors. W3C, August 2006.</dd>
1.1 avankest 1506: </dl>
1.11 avankest 1507:
1.130 avankest 1508: <h2 class="no-num" id="acknowledgments">Acknowledgments</h2>
1.11 avankest 1509:
1.159 avankest 1510: <p>The editor would like to thank
1.12 avankest 1511:
1.163 avankest 1512: Addison Phillips,
1.159 avankest 1513: Ahmed Kamel,
1514: Alex Hopmann,
1515: Alex Vincent,
1516: Alexey Proskuryakov,
1517: Asbjørn Ulsberg,
1518: Boris Zbarsky,
1519: Björn Höhrmann,
1520: Cameron McCormack,
1521: Christophe Jolif,
1522: Charles McCathieNevile,
1523: Dan Winship,
1524: David Håsäther,
1525: Dean Jackson,
1526: Denis Sureau,
1527: Doug Schepers,
1528: Douglas Livingstone,
1529: Elliotte Harold,
1530: Eric Lawrence,
1.163 avankest 1531: Geoffrey Sneddon,
1.159 avankest 1532: Gideon Cohn,
1533: Gorm Haug Eriksen,
1534: Hallvord R. M. Steen,
1535: Håkon Wium Lie,
1536: Ian Davis,
1537: Ian Hickson,
1538: Ivan Herman,
1539: Jeff Walden,
1540: Jens Lindström,
1541: Jim Deegan,
1542: Jim Ley,
1543: Joe Farro,
1544: Jonas Sicking,
1545: Julian Reschke,
1546: Karl Dubost,
1.175 avankest 1547: Lachlan Hunt,
1.159 avankest 1548: Maciej Stachowiak,
1549: Magnus Kristiansen,
1550: Marc Hadley,
1551: Marcos Caceres,
1552: Mark Baker,
1553: Mark Nottingham,
1554: Mohamed Zergaoui,
1555: Pawel Glowacki,
1556: Robin Berjon,
1557: Ruud Steltenpool,
1558: Simon Pieters,
1559: Stewart Brodie,
1560: Sunava Dutta,
1.186 avankest 1561: Thomas Roessler,
1.159 avankest 1562: Tom Magliery and
1563: Zhenbin Xu
1.181 avankest 1564:
1.159 avankest 1565: for their contributions to this specification.</p>
1.12 avankest 1566:
1.1 avankest 1567: <p>Special thanks to the Microsoft employees who first implemented the
1.143 avankest 1568: <code title="">XMLHttpRequest</code> interface, which was first widely
1569: deployed by the Windows Internet Explorer browser.</p>
1.12 avankest 1570:
1.143 avankest 1571: <p>Special thanks also to the WHATWG for drafting an initial version of
1572: this specification in their Web Applications 1.0 document (now renamed to
1573: HTML 5). [<cite><span>HTML5</span></cite>]</p>
1.12 avankest 1574:
1.143 avankest 1575: <p>Thanks also to all those who have helped to improve this specification
1576: by sending suggestions and corrections. (Please, keep bugging us with your
1.22 avankest 1577: issues!)</p>
1.1 avankest 1578: </body>
1579: </html>
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