1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 | // XMLHttpRequest.js Copyright (C) 2010 Sergey Ilinsky (http://www.ilinsky.com) // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. /** * @requires OpenLayers/Request.js */ (function () { // Save reference to earlier defined object implementation (if any) var oXMLHttpRequest = window.XMLHttpRequest; // Define on browser type var bGecko = !!window.controllers, bIE = window.document.all && !window.opera, bIE7 = bIE && window.navigator.userAgent.match(/MSIE ([\.0-9]+)/) && RegExp.$1 == 7; // Constructor function cXMLHttpRequest() { this._object = oXMLHttpRequest && !bIE7 ? new oXMLHttpRequest : new window.ActiveXObject("Microsoft.XMLHTTP"); this._listeners = []; }; // BUGFIX: Firefox with Firebug installed would break pages if not executed if (bGecko && oXMLHttpRequest.wrapped) cXMLHttpRequest.wrapped = oXMLHttpRequest.wrapped; // Constants cXMLHttpRequest.UNSENT = 0; cXMLHttpRequest.OPENED = 1; cXMLHttpRequest.HEADERS_RECEIVED = 2; cXMLHttpRequest.LOADING = 3; cXMLHttpRequest.DONE = 4; // Public Properties cXMLHttpRequest.prototype.readyState = cXMLHttpRequest.UNSENT; cXMLHttpRequest.prototype.responseText = ''; cXMLHttpRequest.prototype.responseXML = null; cXMLHttpRequest.prototype.status = 0; cXMLHttpRequest.prototype.statusText = ''; // Instance-level Events Handlers cXMLHttpRequest.prototype.onreadystatechange = null; // Class-level Events Handlers cXMLHttpRequest.onreadystatechange = null; cXMLHttpRequest.onopen = null; cXMLHttpRequest.onsend = null; cXMLHttpRequest.onabort = null; // Public Methods cXMLHttpRequest.prototype.open = function(sMethod, sUrl, bAsync, sUser, sPassword) { // Delete headers, required when object is reused delete this._headers; // When bAsync parameter value is omitted, use true as default if (arguments.length < 3) bAsync = true; // Save async parameter for fixing Gecko bug with missing readystatechange in synchronous requests this._async = bAsync; // Set the onreadystatechange handler var oRequest = this, nState = this.readyState, fOnUnload; // BUGFIX: IE - memory leak on page unload (inter-page leak) if (bIE && bAsync) { fOnUnload = function() { if (nState != cXMLHttpRequest.DONE) { fCleanTransport(oRequest); // Safe to abort here since onreadystatechange handler removed oRequest.abort(); } }; window.attachEvent("onunload", fOnUnload); } // Add method sniffer if (cXMLHttpRequest.onopen) cXMLHttpRequest.onopen.apply(this, arguments); if (arguments.length > 4) this._object.open(sMethod, sUrl, bAsync, sUser, sPassword); else if (arguments.length > 3) this._object.open(sMethod, sUrl, bAsync, sUser); else this._object.open(sMethod, sUrl, bAsync); if (!bGecko && !bIE) { this.readyState = cXMLHttpRequest.OPENED; fReadyStateChange(this); } this._object.onreadystatechange = function() { if (bGecko && !bAsync) return; // Synchronize state oRequest.readyState = oRequest._object.readyState; // fSynchronizeValues(oRequest); // BUGFIX: Firefox fires unnecessary DONE when aborting if (oRequest._aborted) { // Reset readyState to UNSENT oRequest.readyState = cXMLHttpRequest.UNSENT; // Return now return; } if (oRequest.readyState == cXMLHttpRequest.DONE) { // fCleanTransport(oRequest); // Uncomment this block if you need a fix for IE cache /* // BUGFIX: IE - cache issue if (!oRequest._object.getResponseHeader("Date")) { // Save object to cache oRequest._cached = oRequest._object; // Instantiate a new transport object cXMLHttpRequest.call(oRequest); // Re-send request if (sUser) { if (sPassword) oRequest._object.open(sMethod, sUrl, bAsync, sUser, sPassword); else oRequest._object.open(sMethod, sUrl, bAsync, sUser); } else oRequest._object.open(sMethod, sUrl, bAsync); oRequest._object.setRequestHeader("If-Modified-Since", oRequest._cached.getResponseHeader("Last-Modified") || new window.Date(0)); // Copy headers set if (oRequest._headers) for (var sHeader in oRequest._headers) if (typeof oRequest._headers[sHeader] == "string") // Some frameworks prototype objects with functions oRequest._object.setRequestHeader(sHeader, oRequest._headers[sHeader]); oRequest._object.onreadystatechange = function() { // Synchronize state oRequest.readyState = oRequest._object.readyState; if (oRequest._aborted) { // oRequest.readyState = cXMLHttpRequest.UNSENT; // Return return; } if (oRequest.readyState == cXMLHttpRequest.DONE) { // Clean Object fCleanTransport(oRequest); // get cached request if (oRequest.status == 304) oRequest._object = oRequest._cached; // delete oRequest._cached; // fSynchronizeValues(oRequest); // fReadyStateChange(oRequest); // BUGFIX: IE - memory leak in interrupted if (bIE && bAsync) window.detachEvent("onunload", fOnUnload); } }; oRequest._object.send(null); // Return now - wait until re-sent request is finished return; }; */ // BUGFIX: IE - memory leak in interrupted if (bIE && bAsync) window.detachEvent("onunload", fOnUnload); } // BUGFIX: Some browsers (Internet Explorer, Gecko) fire OPEN readystate twice if (nState != oRequest.readyState) fReadyStateChange(oRequest); nState = oRequest.readyState; } }; cXMLHttpRequest.prototype.send = function(vData) { // Add method sniffer if (cXMLHttpRequest.onsend) cXMLHttpRequest.onsend.apply(this, arguments); // BUGFIX: Safari - fails sending documents created/modified dynamically, so an explicit serialization required // BUGFIX: IE - rewrites any custom mime-type to "text/xml" in case an XMLNode is sent // BUGFIX: Gecko - fails sending Element (this is up to the implementation either to standard) if (vData && vData.nodeType) { vData = window.XMLSerializer ? new window.XMLSerializer().serializeToString(vData) : vData.xml; if (!this._headers["Content-Type"]) this._object.setRequestHeader("Content-Type", "application/xml"); } this._object.send(vData); // BUGFIX: Gecko - missing readystatechange calls in synchronous requests if (bGecko && !this._async) { this.readyState = cXMLHttpRequest.OPENED; // Synchronize state fSynchronizeValues(this); // Simulate missing states while (this.readyState < cXMLHttpRequest.DONE) { this.readyState++; fReadyStateChange(this); // Check if we are aborted if (this._aborted) return; } } }; cXMLHttpRequest.prototype.abort = function() { // Add method sniffer if (cXMLHttpRequest.onabort) cXMLHttpRequest.onabort.apply(this, arguments); // BUGFIX: Gecko - unnecessary DONE when aborting if (this.readyState > cXMLHttpRequest.UNSENT) this._aborted = true; this._object.abort(); // BUGFIX: IE - memory leak fCleanTransport(this); }; cXMLHttpRequest.prototype.getAllResponseHeaders = function() { return this._object.getAllResponseHeaders(); }; cXMLHttpRequest.prototype.getResponseHeader = function(sName) { return this._object.getResponseHeader(sName); }; cXMLHttpRequest.prototype.setRequestHeader = function(sName, sValue) { // BUGFIX: IE - cache issue if (!this._headers) this._headers = {}; this._headers[sName] = sValue; return this._object.setRequestHeader(sName, sValue); }; // EventTarget interface implementation cXMLHttpRequest.prototype.addEventListener = function(sName, fHandler, bUseCapture) { for (var nIndex = 0, oListener; oListener = this._listeners[nIndex]; nIndex++) if (oListener[0] == sName && oListener[1] == fHandler && oListener[2] == bUseCapture) return; // Add listener this._listeners.push([sName, fHandler, bUseCapture]); }; cXMLHttpRequest.prototype.removeEventListener = function(sName, fHandler, bUseCapture) { for (var nIndex = 0, oListener; oListener = this._listeners[nIndex]; nIndex++) if (oListener[0] == sName && oListener[1] == fHandler && oListener[2] == bUseCapture) break; // Remove listener if (oListener) this._listeners.splice(nIndex, 1); }; cXMLHttpRequest.prototype.dispatchEvent = function(oEvent) { var oEventPseudo = { 'type': oEvent.type, 'target': this, 'currentTarget':this, 'eventPhase': 2, 'bubbles': oEvent.bubbles, 'cancelable': oEvent.cancelable, 'timeStamp': oEvent.timeStamp, 'stopPropagation': function() {}, // There is no flow 'preventDefault': function() {}, // There is no default action 'initEvent': function() {} // Original event object should be initialized }; // Execute onreadystatechange if (oEventPseudo.type == "readystatechange" && this.onreadystatechange) (this.onreadystatechange.handleEvent || this.onreadystatechange).apply(this, [oEventPseudo]); // Execute listeners for (var nIndex = 0, oListener; oListener = this._listeners[nIndex]; nIndex++) if (oListener[0] == oEventPseudo.type && !oListener[2]) (oListener[1].handleEvent || oListener[1]).apply(this, [oEventPseudo]); }; // cXMLHttpRequest.prototype.toString = function() { return '[' + "object" + ' ' + "XMLHttpRequest" + ']'; }; cXMLHttpRequest.toString = function() { return '[' + "XMLHttpRequest" + ']'; }; // Helper function function fReadyStateChange(oRequest) { // Sniffing code if (cXMLHttpRequest.onreadystatechange) cXMLHttpRequest.onreadystatechange.apply(oRequest); // Fake event oRequest.dispatchEvent({ 'type': "readystatechange", 'bubbles': false, 'cancelable': false, 'timeStamp': new Date + 0 }); }; function fGetDocument(oRequest) { var oDocument = oRequest.responseXML, sResponse = oRequest.responseText; // Try parsing responseText if (bIE && sResponse && oDocument && !oDocument.documentElement && oRequest.getResponseHeader("Content-Type").match(/[^\/]+\/[^\+]+\+xml/)) { oDocument = new window.ActiveXObject("Microsoft.XMLDOM"); oDocument.async = false; oDocument.validateOnParse = false; oDocument.loadXML(sResponse); } // Check if there is no error in document if (oDocument) if ((bIE && oDocument.parseError != 0) || !oDocument.documentElement || (oDocument.documentElement && oDocument.documentElement.tagName == "parsererror")) return null; return oDocument; }; function fSynchronizeValues(oRequest) { try { oRequest.responseText = oRequest._object.responseText; } catch (e) {} try { oRequest.responseXML = fGetDocument(oRequest._object); } catch (e) {} try { oRequest.status = oRequest._object.status; } catch (e) {} try { oRequest.statusText = oRequest._object.statusText; } catch (e) {} }; function fCleanTransport(oRequest) { // BUGFIX: IE - memory leak (on-page leak) oRequest._object.onreadystatechange = new window.Function; }; // Internet Explorer 5.0 (missing apply) if (!window.Function.prototype.apply) { window.Function.prototype.apply = function(oRequest, oArguments) { if (!oArguments) oArguments = []; oRequest.__func = this; oRequest.__func(oArguments[0], oArguments[1], oArguments[2], oArguments[3], oArguments[4]); delete oRequest.__func; }; }; // Register new object with window /** * Class: OpenLayers.Request.XMLHttpRequest * Standard-compliant (W3C) cross-browser implementation of the * XMLHttpRequest object. From * http://code.google.com/p/xmlhttprequest/. */ OpenLayers.Request.XMLHttpRequest = cXMLHttpRequest; })(); |