1/* 2 * Copyright 2005 Joe Walker 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17/** 18 * Declare an object to which we can add real functions. 19 */ 20if (dwr == null) var dwr = {}; 21if (dwr.engine == null) dwr.engine = {}; 22if (DWREngine == null) var DWREngine = dwr.engine; 23 24/** 25 * Set an alternative error handler from the default alert box. 26 * @see getahead.org/dwr/browser/engine/errors 27 */ 28dwr.engine.setErrorHandler = function(handler) { 29 dwr.engine._errorHandler = handler; 30}; 31 32/** 33 * Set an alternative warning handler from the default alert box. 34 * @see getahead.org/dwr/browser/engine/errors 35 */ 36dwr.engine.setWarningHandler = function(handler) { 37 dwr.engine._warningHandler = handler; 38}; 39 40/** 41 * Setter for the text/html handler - what happens if a DWR request gets an HTML 42 * reply rather than the expected Javascript. Often due to login timeout 43 */ 44dwr.engine.setTextHtmlHandler = function(handler) { 45 dwr.engine._textHtmlHandler = handler; 46}; 47 48/** 49 * Set a default timeout value for all calls. 0 (the default) turns timeouts off. 50 * @see getahead.org/dwr/browser/engine/errors 51 */ 52dwr.engine.setTimeout = function(timeout) { 53 dwr.engine._timeout = timeout; 54}; 55 56/** 57 * The Pre-Hook is called before any DWR remoting is done. 58 * @see getahead.org/dwr/browser/engine/hooks 59 */ 60dwr.engine.setPreHook = function(handler) { 61 dwr.engine._preHook = handler; 62}; 63 64/** 65 * The Post-Hook is called after any DWR remoting is done. 66 * @see getahead.org/dwr/browser/engine/hooks 67 */ 68dwr.engine.setPostHook = function(handler) { 69 dwr.engine._postHook = handler; 70}; 71 72/** 73 * Custom headers for all DWR calls 74 * @see getahead.org/dwr/???? 75 */ 76dwr.engine.setHeaders = function(headers) { 77 dwr.engine._headers = headers; 78}; 79 80/** 81 * Custom parameters for all DWR calls 82 * @see getahead.org/dwr/???? 83 */ 84dwr.engine.setParameters = function(parameters) { 85 dwr.engine._parameters = parameters; 86}; 87 88/** XHR remoting type constant. See dwr.engine.set[Rpc|Poll]Type() */ 89dwr.engine.XMLHttpRequest = 1; 90 91/** XHR remoting type constant. See dwr.engine.set[Rpc|Poll]Type() */ 92dwr.engine.IFrame = 2; 93 94/** XHR remoting type constant. See dwr.engine.setRpcType() */ 95dwr.engine.ScriptTag = 3; 96 97/** 98 * Set the preferred remoting type. 99 * @param newType One of dwr.engine.XMLHttpRequest or dwr.engine.IFrame or dwr.engine.ScriptTag 100 * @see getahead.org/dwr/browser/engine/options 101 */ 102dwr.engine.setRpcType = function(newType) { 103 if (newType != dwr.engine.XMLHttpRequest && newType != dwr.engine.IFrame && newType != dwr.engine.ScriptTag) { 104 dwr.engine._handleError(null, { name:"dwr.engine.invalidRpcType", message:"RpcType must be one of dwr.engine.XMLHttpRequest or dwr.engine.IFrame or dwr.engine.ScriptTag" }); 105 return; 106 } 107 dwr.engine._rpcType = newType; 108}; 109 110/** 111 * Which HTTP method do we use to send results? Must be one of "GET" or "POST". 112 * @see getahead.org/dwr/browser/engine/options 113 */ 114dwr.engine.setHttpMethod = function(httpMethod) { 115 if (httpMethod != "GET" && httpMethod != "POST") { 116 dwr.engine._handleError(null, { name:"dwr.engine.invalidHttpMethod", message:"Remoting method must be one of GET or POST" }); 117 return; 118 } 119 dwr.engine._httpMethod = httpMethod; 120}; 121 122/** 123 * Ensure that remote calls happen in the order in which they were sent? (Default: false) 124 * @see getahead.org/dwr/browser/engine/ordering 125 */ 126dwr.engine.setOrdered = function(ordered) { 127 dwr.engine._ordered = ordered; 128}; 129 130/** 131 * Do we ask the XHR object to be asynchronous? (Default: true) 132 * @see getahead.org/dwr/browser/engine/options 133 */ 134dwr.engine.setAsync = function(async) { 135 dwr.engine._async = async; 136}; 137 138/** 139 * Does DWR poll the server for updates? (Default: false) 140 * @see getahead.org/dwr/browser/engine/options 141 */ 142dwr.engine.setActiveReverseAjax = function(activeReverseAjax) { 143 if (activeReverseAjax) { 144 // Bail if we are already started 145 if (dwr.engine._activeReverseAjax) return; 146 dwr.engine._activeReverseAjax = true; 147 dwr.engine._poll(); 148 } 149 else { 150 // Can we cancel an existing request? 151 if (dwr.engine._activeReverseAjax && dwr.engine._pollReq) dwr.engine._pollReq.abort(); 152 dwr.engine._activeReverseAjax = false;
153 } 154 // TODO: in iframe mode, if we start, stop, start then the second start may 155 // well kick off a second iframe while the first is still about to return 156 // we should cope with this but we don't 157}; 158 159/** 160 * The default message handler. 161 * @see getahead.org/dwr/browser/engine/errors 162 */ 163dwr.engine.defaultErrorHandler = function(message, ex) { 164 dwr.engine._debug("Error: " + ex.name + ", " + ex.message, true); 165 /*if (message == null || message == "") alert("A server error has occured."); 166 // Ignore NS_ERROR_NOT_AVAILABLE if Mozilla is being narky 167 else if (message.indexOf("0x80040111") != -1) dwr.engine._debug(message); 168 else if (message.indexOf("Failed to read input") == -1 && 169 message.indexOf("Not Implemented") == -1 && 170 message.indexOf("Service Unavailable") == -1 ) alert(message); 171 */ 172 dwr.engine._debug(message); 173}; 174 175/** 176 * The default warning handler. 177 * @see getahead.org/dwr/browser/engine/errors 178 */ 179dwr.engine.defaultWarningHandler = function(message, ex) { 180 dwr.engine._debug(message); 181}; 182 183/** 184 * For reduced latency you can group several remote calls together using a batch. 185 * @see getahead.org/dwr/browser/engine/batch 186 */ 187dwr.engine.beginBatch = function() { 188 if (dwr.engine._batch) { 189 dwr.engine._handleError(null, { name:"dwr.engine.batchBegun", message:"Batch already begun" }); 190 return; 191 } 192 dwr.engine._batch = dwr.engine._createBatch(); 193}; 194 195/** 196 * Finished grouping a set of remote calls together. Go and execute them all. 197 * @see getahead.org/dwr/browser/engine/batch 198 */ 199dwr.engine.endBatch = function(options) { 200 var batch = dwr.engine._batch; 201 if (batch == null) { 202 dwr.engine._handleError(null, { name:"dwr.engine.batchNotBegun", message:"No batch in progress" }); 203 return; 204 } 205 dwr.engine._batch = null; 206 if (batch.map.callCount == 0) return; 207 208 // The hooks need to be merged carefully to preserve ordering 209 if (options) dwr.engine._mergeBatch(batch, options); 210 211 // In ordered mode, we don't send unless the list of sent items is empty 212 if (dwr.engine._ordered && dwr.engine._batchesLength != 0) { 213 dwr.engine._batchQueue[dwr.engine._batchQueue.length] = batch; 214 } 215 else { 216 dwr.engine._sendData(batch); 217 } 218}; 219 220/** @deprecated */ 221dwr.engine.setPollMethod = function(type) { dwr.engine.setPollType(type); }; 222dwr.engine.setMethod = function(type) { dwr.engine.setRpcType(type); }; 223dwr.engine.setVerb = function(verb) { dwr.engine.setHttpMethod(verb); }; 224dwr.engine.setPollType = function() { dwr.engine._debug("Manually setting the Poll Type is not supported"); }; 225 226//============================================================================== 227// Only private stuff below here 228//============================================================================== 229 230/** The original page id sent from the server */ 231dwr.engine._origScriptSessionId = "EAF334B623A0DF4ED1F9E4EB5DCF604C"; 232 233/** The session cookie name */ 234dwr.engine._sessionCookieName = "JSESSIONID"; // JSESSIONID 235 236/** Is GET enabled for the benefit of Safari? */ 237dwr.engine._allowGetForSafariButMakeForgeryEasier = "false"; 238 239/** The script prefix to strip in the case of scriptTagProtection. */ 240dwr.engine._scriptTagProtection = "throw 'allowScriptTagRemoting is false.';"; 241 242/** The default path to the DWR servlet */ 243dwr.engine._defaultPath = "/system/dwr"; 244 245/** Do we use XHR for reverse ajax because we are not streaming? */ 246dwr.engine._pollWithXhr = "false"; 247 248/** The read page id that we calculate */ 249dwr.engine._scriptSessionId = null; 250 251/** The function that we use to fetch/calculate a session id */ 252dwr.engine._getScriptSessionId = function() { 253 if (dwr.engine._scriptSessionId == null) { 254 dwr.engine._scriptSessionId = dwr.engine._origScriptSessionId + Math.floor(Math.random() * 1000); 255 } 256 return dwr.engine._scriptSessionId; 257}; 258 259/** A function to call if something fails. */ 260dwr.engine._errorHandler = dwr.engine.defaultErrorHandler; 261 262/** For debugging when something unexplained happens. */ 263dwr.engine._warningHandler = dwr.engine.defaultWarningHandler; 264 265/** A function to be called before requests are marshalled. Can be null. */ 266dwr.engine._preHook = null; 267 268/** A function to be called after replies are received. Can be null. */ 269dwr.engine._postHook = null; 270 271/** An map of the batches that we have sent and are awaiting a reply on. */ 272dwr.engine._batches = {}; 273
274/** A count of the number of outstanding batches. Should be == to _batches.length unless prototype has messed things up */ 275dwr.engine._batchesLength = 0; 276 277/** In ordered mode, the array of batches waiting to be sent */ 278dwr.engine._batchQueue = []; 279 280/** What is the default rpc type */ 281dwr.engine._rpcType = dwr.engine.XMLHttpRequest; 282 283/** What is the default remoting method (ie GET or POST) */ 284dwr.engine._httpMethod = "POST"; 285 286/** Do we attempt to ensure that calls happen in the order in which they were sent? */ 287dwr.engine._ordered = false; 288 289/** Do we make the calls async? */ 290dwr.engine._async = true; 291 292/** The current batch (if we are in batch mode) */ 293dwr.engine._batch = null; 294 295/** The global timeout */ 296dwr.engine._timeout = 0; 297 298/** ActiveX objects to use when we want to convert an xml string into a DOM object. */ 299dwr.engine._DOMDocument = ["Msxml2.DOMDocument.6.0", "Msxml2.DOMDocument.5.0", "Msxml2.DOMDocument.4.0", "Msxml2.DOMDocument.3.0", "MSXML2.DOMDocument", "MSXML.DOMDocument", "Microsoft.XMLDOM"]; 300 301/** The ActiveX objects to use when we want to do an XMLHttpRequest call. */ 302dwr.engine._XMLHTTP = ["Msxml2.XMLHTTP.6.0", "Msxml2.XMLHTTP.5.0", "Msxml2.XMLHTTP.4.0", "MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP", "Microsoft.XMLHTTP"]; 303 304/** Are we doing comet or polling? */ 305dwr.engine._activeReverseAjax = false; 306 307/** The iframe that we are using to poll */ 308dwr.engine._outstandingIFrames = []; 309 310/** The xhr object that we are using to poll */ 311dwr.engine._pollReq = null; 312 313/** How many milliseconds between internal comet polls */ 314dwr.engine._pollCometInterval = 200; 315 316/** How many times have we re-tried to poll? */ 317dwr.engine._pollRetries = 0; 318dwr.engine._maxPollRetries = 0; 319 320/** Do we do a document.reload if we get a text/html reply? */ 321dwr.engine._textHtmlHandler = null; 322 323/** If you wish to send custom headers with every request */ 324dwr.engine._headers = null; 325 326/** If you wish to send extra custom request parameters with each request */ 327dwr.engine._parameters = null; 328 329/** Undocumented interceptors - do not use */ 330dwr.engine._postSeperator = "&"; 331dwr.engine._defaultInterceptor = function(data) { return data; }; 332dwr.engine._urlRewriteHandler = dwr.engine._defaultInterceptor; 333dwr.engine._contentRewriteHandler = dwr.engine._defaultInterceptor; 334dwr.engine._replyRewriteHandler = dwr.engine._defaultInterceptor; 335 336/** Batch ids allow us to know which batch the server is answering */ 337dwr.engine._nextBatchId = 0; 338 339/** A list of the properties that need merging from calls to a batch */ 340dwr.engine._propnames = [ "rpcType", "httpMethod", "async", "timeout", "errorHandler", "warningHandler", "textHtmlHandler" ]; 341 342/** Do we stream, or can be hacked to do so? */ 343dwr.engine._partialResponseNo = 0; 344dwr.engine._partialResponseYes = 1; 345dwr.engine._partialResponseFlush = 2; 346 347/** Is this page in the process of unloading? */ 348dwr.engine._unloading = false; 349 350/** 351 * @private Send a request. Called by the Javascript interface stub 352 * @param path part of URL after the host and before the exec bit without leading or trailing /s 353 * @param scriptName The class to execute 354 * @param methodName The method on said class to execute 355 * @param func The callback function to which any returned data should be passed 356 * if this is null, any returned data will be ignored 357 * @param vararg_params The parameters to pass to the above class 358 */ 359dwr.engine._execute = function(path, scriptName, methodName, vararg_params) { 360 var singleShot = false; 361 if (dwr.engine._batch == null) { 362 dwr.engine.beginBatch(); 363 singleShot = true; 364 } 365 var batch = dwr.engine._batch; 366 // To make them easy to manipulate we copy the arguments into an args array 367 var args = []; 368 for (var i = 0; i < arguments.length - 3; i++) { 369 args[i] = arguments[i + 3]; 370 } 371 // All the paths MUST be to the same servlet 372 if (batch.path == null) { 373 batch.path = path; 374 } 375 else { 376 if (batch.path != path) { 377 dwr.engine._handleError(batch, { name:"dwr.engine.multipleServlets", message:"Can't batch requests to multiple DWR Servlets." }); 378 return; 379 } 380 } 381 // From the other params, work out which is the function (or object with 382 // call meta-data) and which is the call parameters 383 var callData; 384 var lastArg = args[args.length - 1]; 385 if (typeof lastArg == "function" || lastArg == null) callData = { callback:args.pop() }; 386 else callData = args.pop(); 387 388 // Merge from the callData into the batch 389 dwr.engine._mergeBatch(batch, callData); 390 batch.handlers[batch.map.callCount] = { 391 exceptionHandler:callData.exceptionHandler, 392 callback:callData.callback 393 }; 394 395 // Copy to the map the things that need serializing 396 var prefix = "c" + batch.map.callCount + "-"; 397 batch.map[prefix + "scriptName"] = scriptName; 398 batch.map[prefix + "methodName"] = methodName; 399 batch.map[prefix + "id"] = batch.map.callCount; 400 var refctx = []; 401 for (i = 0; i < args.length; i++) { 402 dwr.engine._serializeAll(batch, refctx, args[i], prefix + "param" + i); 403 } 404 405 // Now we have finished remembering the call, we incr the call count 406 batch.map.callCount++; 407 if (singleShot) dwr.engine.endBatch(); 408}; 409 410/** @private Poll the server to see if there is any data waiting */ 411dwr.engine._poll = function() { 412 if (!dwr.engine._activeReverseAjax) return; 413 414 var batch = dwr.engine._createBatch(); 415 batch.map.id = 0; // TODO: Do we need this?? 416 batch.map.callCount = 1; 417 batch.isPoll = true; 418 if (dwr.engine._pollWithXhr == "true") { 419 batch.rpcType = dwr.engine.XMLHttpRequest; 420 batch.map.partialResponse = dwr.engine._partialResponseNo; 421 } 422 else { 423 if (navigator.userAgent.indexOf("Gecko/") != -1) { 424 batch.rpcType = dwr.engine.XMLHttpRequest; 425 batch.map.partialResponse = dwr.engine._partialResponseYes; 426 } 427 else { 428 batch.rpcType = dwr.engine.XMLHttpRequest; 429 batch.map.partialResponse = dwr.engine._partialResponseNo; 430 } 431 } 432 batch.httpMethod = "POST"; 433 batch.async = true; 434 batch.timeout = 0; 435 batch.path = dwr.engine._defaultPath; 436 batch.preHooks = []; 437 batch.postHooks = []; 438 batch.errorHandler = dwr.engine._pollErrorHandler; 439 batch.warningHandler = dwr.engine._pollErrorHandler; 440 batch.handlers[0] = { 441 callback:function(pause) { 442 dwr.engine._pollRetries = 0; 443 setTimeout(dwr.engine._poll, pause); 444 } 445 }; 446 447 // Send the data 448 dwr.engine._sendData(batch); 449 if (batch.rpcType == dwr.engine.XMLHttpRequest && batch.map.partialResponse == dwr.engine._partialResponseYes) { 450 dwr.engine._checkCometPoll(); 451 } 452}; 453 454/** Try to recover from polling errors */ 455dwr.engine._pollErrorHandler = function(msg, ex) { 456 // if anything goes wrong then just silently try again (up to 3x) after 10s 457 dwr.engine._pollRetries++; 458 dwr.engine._debug("Reverse Ajax poll failed (pollRetries=" + dwr.engine._pollRetries + "): " + ex.name + " : " + ex.message); 459 if (dwr.engine._pollRetries < dwr.engine._maxPollRetries) { 460 setTimeout(dwr.engine._poll, 10000); 461 } 462 else { 463 dwr.engine._activeReverseAjax = false;
464 dwr.engine._debug("Giving up."); 465 } 466}; 467 468/** @private Generate a new standard batch */ 469dwr.engine._createBatch = function() { 470 var batch = { 471 map:{ 472 callCount:0, 473 page:window.location.pathname + window.location.search, 474 httpSessionId:dwr.engine._getJSessionId(), 475 scriptSessionId:dwr.engine._getScriptSessionId() 476 }, 477 charsProcessed:0, paramCount:0, 478 parameters:{}, headers:{}, 479 isPoll:false, handlers:{}, preHooks:[], postHooks:[], 480 rpcType:dwr.engine._rpcType, 481 httpMethod:dwr.engine._httpMethod, 482 async:dwr.engine._async, 483 timeout:dwr.engine._timeout, 484 errorHandler:dwr.engine._errorHandler, 485 warningHandler:dwr.engine._warningHandler, 486 textHtmlHandler:dwr.engine._textHtmlHandler 487 }; 488 if (dwr.engine._preHook) batch.preHooks.push(dwr.engine._preHook); 489 if (dwr.engine._postHook) batch.postHooks.push(dwr.engine._postHook); 490 var propname, data; 491 if (dwr.engine._headers) { 492 for (propname in dwr.engine._headers) { 493 data = dwr.engine._headers[propname]; 494 if (typeof data != "function") batch.headers[propname] = data; 495 } 496 } 497 if (dwr.engine._parameters) { 498 for (propname in dwr.engine._parameters) { 499 data = dwr.engine._parameters[propname]; 500 if (typeof data != "function") batch.parameters[propname] = data; 501 } 502 } 503 return batch; 504}; 505 506/** @private Take further options and merge them into */ 507dwr.engine._mergeBatch = function(batch, overrides) { 508 var propname, data; 509 for (var i = 0; i < dwr.engine._propnames.length; i++) { 510 propname = dwr.engine._propnames[i]; 511 if (overrides[propname] != null) batch[propname] = overrides[propname]; 512 } 513 if (overrides.preHook != null) batch.preHooks.unshift(overrides.preHook); 514 if (overrides.postHook != null) batch.postHooks.push(overrides.postHook); 515 if (overrides.headers) { 516 for (propname in overrides.headers) { 517 data = overrides.headers[propname]; 518 if (typeof data != "function") batch.headers[propname] = data; 519 } 520 } 521 if (overrides.parameters) { 522 for (propname in overrides.parameters) { 523 data = overrides.parameters[propname]; 524 if (typeof data != "function") batch.map["p-" + propname] = "" + data; 525 } 526 } 527}; 528 529/** @private What is our session id? */ 530dwr.engine._getJSessionId = function() { 531 var cookies = document.cookie.split(';'); 532 for (var i = 0; i < cookies.length; i++) { 533 var cookie = cookies[i]; 534 while (cookie.charAt(0) == ' ') cookie = cookie.substring(1, cookie.length); 535 if (cookie.indexOf(dwr.engine._sessionCookieName + "=") == 0) { 536 return cookie.substring(dwr.engine._sessionCookieName.length + 1, cookie.length); 537 } 538 } 539 return ""; 540}; 541 542/** @private Check for reverse Ajax activity */ 543dwr.engine._checkCometPoll = function() { 544 for (var i = 0; i < dwr.engine._outstandingIFrames.length; i++) { 545 var text = ""; 546 var iframe = dwr.engine._outstandingIFrames[i]; 547 try { 548 text = dwr.engine._getTextFromCometIFrame(iframe); 549 } 550 catch (ex) { 551 dwr.engine._handleWarning(iframe.batch, ex); 552 } 553 if (text != "") dwr.engine._processCometResponse(text, iframe.batch); 554 } 555 if (dwr.engine._pollReq) { 556 var req = dwr.engine._pollReq; 557 var text = req.responseText; 558 if (text != null) dwr.engine._processCometResponse(text, req.batch); 559 } 560 561 // If the poll resources are still there, come back again 562 if (dwr.engine._outstandingIFrames.length > 0 || dwr.engine._pollReq) { 563 setTimeout(dwr.engine._checkCometPoll, dwr.engine._pollCometInterval); 564 } 565}; 566 567/** @private Extract the whole (executed an all) text from the current iframe */ 568dwr.engine._getTextFromCometIFrame = function(frameEle) { 569 var body = frameEle.contentWindow.document.body; 570 if (body == null) return ""; 571 var text = body.innerHTML; 572 // We need to prevent IE from stripping line feeds 573 if (text.indexOf("<PRE>") == 0 || text.indexOf("<pre>") == 0) { 574 text = text.substring(5, text.length - 7); 575 } 576 return text; 577}; 578 579/** @private Some more text might have come in, test and execute the new stuff */ 580dwr.engine._processCometResponse = function(response, batch) { 581 if (batch.charsProcessed == response.length) return; 582 if (response.length == 0) { 583 batch.charsProcessed = 0; 584 return; 585 } 586 587 var firstStartTag = response.indexOf("//#DWR-START#", batch.charsProcessed); 588 if (firstStartTag == -1) { 589 // dwr.engine._debug("No start tag (search from " + batch.charsProcessed + "). skipping '" + response.substring(batch.charsProcessed) + "'"); 590 batch.charsProcessed = response.length; 591 return; 592 } 593 // if (firstStartTag > 0) { 594 // dwr.engine._debug("Start tag not at start (search from " + batch.charsProcessed + "). skipping '" + response.substring(batch.charsProcessed, firstStartTag) + "'"); 595 // } 596 597 var lastEndTag = response.lastIndexOf("//#DWR-END#"); 598 if (lastEndTag == -1) { 599 // dwr.engine._debug("No end tag. unchanged charsProcessed=" + batch.charsProcessed); 600 return; 601 } 602 603 // Skip the end tag too for next time, remembering CR and LF 604 if (response.charCodeAt(lastEndTag + 11) == 13 && response.charCodeAt(lastEndTag + 12) == 10) { 605 batch.charsProcessed = lastEndTag + 13; 606 } 607 else { 608 batch.charsProcessed = lastEndTag + 11; 609 } 610 611 var exec = response.substring(firstStartTag + 13, lastEndTag); 612 613 dwr.engine._receivedBatch = batch; 614 dwr.engine._eval(exec); 615 dwr.engine._receivedBatch = null; 616}; 617 618/** @private Actually send the block of data in the batch object. */ 619dwr.engine._sendData = function(batch) { 620 batch.map.batchId = dwr.engine._nextBatchId; 621 dwr.engine._nextBatchId++; 622 dwr.engine._batches[batch.map.batchId] = batch; 623 dwr.engine._batchesLength++; 624 batch.completed = false;
625 626 for (var i = 0; i < batch.preHooks.length; i++) { 627 batch.preHooks[i](); 628 } 629 batch.preHooks = null; 630 // Set a timeout 631 if (batch.timeout && batch.timeout != 0) { 632 batch.timeoutId = setTimeout(function() { dwr.engine._abortRequest(batch); }, batch.timeout); 633 } 634 // Get setup for XMLHttpRequest if possible 635 if (batch.rpcType == dwr.engine.XMLHttpRequest) { 636 if (window.XMLHttpRequest) { 637 batch.req = new XMLHttpRequest(); 638 } 639 // IE5 for the mac claims to support window.ActiveXObject, but throws an error when it's used 640 else if (window.ActiveXObject && !(navigator.userAgent.indexOf("Mac") >= 0 && navigator.userAgent.indexOf("MSIE") >= 0)) { 641 batch.req = dwr.engine._newActiveXObject(dwr.engine._XMLHTTP); 642 } 643 } 644 645 var prop, request; 646 if (batch.req) { 647 // Proceed using XMLHttpRequest 648 if (batch.async) { 649 batch.req.onreadystatechange = function() { 650 if (typeof dwr != 'undefined') dwr.engine._stateChange(batch); 651 }; 652 } 653 // If we're polling, record this for monitoring 654 if (batch.isPoll) { 655 dwr.engine._pollReq = batch.req; 656 // In IE XHR is an ActiveX control so you can't augment it like this 657 if (!(document.all && !window.opera)) batch.req.batch = batch; 658 } 659 // Workaround for Safari 1.x POST bug 660 var indexSafari = navigator.userAgent.indexOf("Safari/"); 661 if (indexSafari >= 0) {
662 var version = navigator.userAgent.substring(indexSafari + 7); 663 if (parseInt(version, 10) < 400) { 664 if (dwr.engine._allowGetForSafariButMakeForgeryEasier == "true") batch.httpMethod = "GET"; 665 else dwr.engine._handleWarning(batch, { name:"dwr.engine.oldSafari", message:"Safari GET support disabled. See getahead.org/dwr/server/servlet and allowGetForSafariButMakeForgeryEasier." }); 666 } 667 } 668 batch.mode = batch.isPoll ? dwr.engine._ModePlainPoll : dwr.engine._ModePlainCall; 669 request = dwr.engine._constructRequest(batch); 670 try { 671 batch.req.open(batch.httpMethod, request.url, batch.async); 672 try { 673 for (prop in batch.headers) { 674 var value = batch.headers[prop]; 675 if (typeof value == "string") batch.req.setRequestHeader(prop, value); 676 } 677 //if (!batch.headers["Content-Type"]) batch.req.setRequestHeader("Content-Type", "text/plain"); 678 batch.req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8"); 679 } 680 catch (ex) { 681 dwr.engine._handleWarning(batch, ex); 682 } 683 batch.req.send(request.body); 684 if (!batch.async) dwr.engine._stateChange(batch); 685 } 686 catch (ex) { 687 dwr.engine._handleError(batch, ex); 688 } 689 } 690 else if (batch.rpcType != dwr.engine.ScriptTag) { 691 var idname = batch.isPoll ? "dwr-if-poll-" + batch.map.batchId : "dwr-if-" + batch.map.batchId; 692 // Removed htmlfile implementation. Don't expect it to return before v3 693 batch.div = document.createElement("div"); 694 // Add the div to the document first, otherwise IE 6 will ignore onload handler. 695 document.body.appendChild(batch.div); 696 batch.div.innerHTML = "<iframe src='javascript:void(0)' frameborder='0' style='width:0px;height:0px;border:0;' id='" + idname + "' name='" + idname + "' onload='dwr.engine._iframeLoadingComplete (" + batch.map.batchId + ");'></iframe>"; 697 batch.document = document; 698 batch.iframe = batch.document.getElementById(idname); 699 batch.iframe.batch = batch; 700 batch.mode = batch.isPoll ? dwr.engine._ModeHtmlPoll : dwr.engine._ModeHtmlCall; 701 if (batch.isPoll) dwr.engine._outstandingIFrames.push(batch.iframe); 702 request = dwr.engine._constructRequest(batch); 703 if (batch.httpMethod == "GET") { 704 batch.iframe.setAttribute("src", request.url); 705 } 706 else { 707 batch.form = batch.document.createElement("form"); 708 batch.form.setAttribute("id", "dwr-form"); 709 batch.form.setAttribute("action", request.url); 710 batch.form.setAttribute("style", "display:none;"); 711 batch.form.setAttribute("target", idname); 712 batch.form.target = idname; 713 batch.form.setAttribute("method", batch.httpMethod); 714 for (prop in batch.map) { 715 var value = batch.map[prop]; 716 if (typeof value != "function") { 717 var formInput = batch.document.createElement("input"); 718 formInput.setAttribute("type", "hidden"); 719 formInput.setAttribute("name", prop); 720 formInput.setAttribute("value", value); 721 batch.form.appendChild(formInput); 722 } 723 } 724 batch.document.body.appendChild(batch.form); 725 batch.form.submit(); 726 } 727 } 728 else { 729 batch.httpMethod = "GET"; // There's no such thing as ScriptTag using POST 730 batch.mode = batch.isPoll ? dwr.engine._ModePlainPoll : dwr.engine._ModePlainCall; 731 request = dwr.engine._constructRequest(batch); 732 batch.script = document.createElement("script"); 733 batch.script.id = "dwr-st-" + batch.map["c0-id"]; 734 batch.script.src = request.url; 735 document.body.appendChild(batch.script); 736 } 737}; 738 739dwr.engine._ModePlainCall = "/call/plaincall/"; 740dwr.engine._ModeHtmlCall = "/call/htmlcall/"; 741dwr.engine._ModePlainPoll = "/call/plainpoll/"; 742dwr.engine._ModeHtmlPoll = "/call/htmlpoll/"; 743 744/** @private Work out what the URL should look like */ 745dwr.engine._constructRequest = function(batch) { 746 // A quick string to help people that use web log analysers 747 var request = { url:batch.path + batch.mode, body:null }; 748 if (batch.isPoll == true) { 749 request.url += "ReverseAjax.dwr"; 750 } 751 else if (batch.map.callCount == 1) { 752 request.url += batch.map["c0-scriptName"] + "." + batch.map["c0-methodName"] + ".dwr"; 753 } 754 else { 755 request.url += "Multiple." + batch.map.callCount + ".dwr"; 756 } 757 // Play nice with url re-writing
758 var sessionMatch = location.href.match(/jsessionid=([^?]+)/); 759 if (sessionMatch != null) { 760 request.url += ";jsessionid=" + sessionMatch[1]; 761 } 762 763 var prop; 764 if (batch.httpMethod == "GET") { 765 // Some browsers (Opera/Safari2) seem to fail to convert the callCount value 766 // to a string in the loop below so we do it manually here. 767 batch.map.callCount = "" + batch.map.callCount; 768 request.url += "?"; 769 for (prop in batch.map) { 770 if (typeof batch.map[prop] != "function") { 771 request.url += encodeURIComponent(prop) + "=" + encodeURIComponent(batch.map[prop]) + "&"; 772 } 773 } 774 request.url = request.url.substring(0, request.url.length - 1); 775 } 776 else { 777 // PERFORMANCE: for iframe mode this is thrown away. 778 request.body = ""; 779 if (document.all && !window.opera) { 780 // Use array joining on IE (fastest) 781 var buf = []; 782 for (prop in batch.map) { 783 if (typeof batch.map[prop] != "function") { 784 buf.push(prop + "=" + encodeURIComponent(batch.map[prop]) + dwr.engine._postSeperator); 785 } 786 } 787 request.body = buf.join(""); 788 } 789 else { 790 // Use string concat on other browsers (fastest) 791 for (prop in batch.map) { 792 if (typeof batch.map[prop] != "function") { 793 request.body += prop + "=" + encodeURIComponent(batch.map[prop]) + dwr.engine._postSeperator; 794 } 795 } 796 } 797 request.body = dwr.engine._contentRewriteHandler(request.body); 798 } 799 request.url = dwr.engine._urlRewriteHandler(request.url); 800 return request; 801}; 802 803/** @private Called by XMLHttpRequest to indicate that something has happened */ 804dwr.engine._stateChange = function(batch) { 805 var toEval; 806 807 if (batch.completed) { 808 dwr.engine._debug("Error: _stateChange() with batch.completed"); 809 return; 810 } 811 812 var req = batch.req; 813 try { 814 if (req.readyState != 4) return; 815 } 816 catch (ex) { 817 dwr.engine._handleWarning(batch, ex); 818 // It's broken - clear up and forget this call 819 dwr.engine._clearUp(batch); 820 return; 821 } 822 823 if (dwr.engine._unloading) { 824 dwr.engine._debug("Ignoring reply from server as page is unloading."); 825 return; 826 } 827 828 try { 829 var reply = req.responseText; 830 reply = dwr.engine._replyRewriteHandler(reply); 831 var status = req.status; // causes Mozilla to except on page moves 832 833 if (reply == null || reply == "") { 834 dwr.engine._handleWarning(batch, { name:"dwr.engine.missingData", message:"No data received from server" }); 835 } 836 else if (status != 200) { 837 dwr.engine._handleError(batch, { name:"dwr.engine.http." + status, message:req.statusText }); 838 } 839 else { 840 var contentType = req.getResponseHeader("Content-Type"); 841 if (!contentType.match(/^text\/plain/) && !contentType.match(/^text\/javascript/)) { 842 if (contentType.match(/^text\/html/) && typeof batch.textHtmlHandler == "function") { 843 batch.textHtmlHandler({ status:status, responseText:reply, contentType:contentType }); 844 } 845 else { 846 dwr.engine._handleWarning(batch, { name:"dwr.engine.invalidMimeType", message:"Invalid content type: '" + contentType + "'" }); 847 } 848 } 849 else { 850 // Comet replies might have already partially executed 851 if (batch.isPoll && batch.map.partialResponse == dwr.engine._partialResponseYes) { 852 dwr.engine._processCometResponse(reply, batch); 853 } 854 else { 855 if (reply.search("//#DWR") == -1) { 856 dwr.engine._handleWarning(batch, { name:"dwr.engine.invalidReply", message:"Invalid reply from server" }); 857 } 858 else { 859 toEval = reply; 860 } 861 } 862 } 863 } 864 } 865 catch (ex) { 866 dwr.engine._handleWarning(batch, ex); 867 } 868 869 dwr.engine._callPostHooks(batch); 870 871 // Outside of the try/catch so errors propogate normally: 872 dwr.engine._receivedBatch = batch; 873 if (toEval != null) toEval = toEval.replace(dwr.engine._scriptTagProtection, ""); 874 dwr.engine._eval(toEval); 875 dwr.engine._receivedBatch = null; 876 dwr.engine._validateBatch(batch); 877 if (!batch.completed) dwr.engine._clearUp(batch); 878}; 879 880/** 881 * @private This function is invoked when a batch reply is received. 882 * It checks that there is a response for every call in the batch. Otherwise, 883 * an error will be signaled (a call without a response indicates that the 884 * server failed to send complete batch response). 885 */ 886dwr.engine._validateBatch = function(batch) { 887 // If some call left unreplied, report an error. 888 if (!batch.completed) { 889 for (var i = 0; i < batch.map.callCount; i++) { 890 if (batch.handlers[i] != null) { 891 dwr.engine._handleWarning(batch, { name:"dwr.engine.incompleteReply", message:"Incomplete reply from server" }); 892 break; 893 } 894 } 895 } 896} 897 898/** @private Called from iframe onload, check batch using batch-id */ 899dwr.engine._iframeLoadingComplete = function(batchId) { 900 // dwr.engine._checkCometPoll(); 901 var batch = dwr.engine._batches[batchId]; 902 if (batch) dwr.engine._validateBatch(batch); 903} 904 905/** @private Called by the server: Execute a callback */ 906dwr.engine._remoteHandleCallback = function(batchId, callId, reply) { 907 var batch = dwr.engine._batches[batchId]; 908 if (batch == null) { 909 dwr.engine._debug("Warning: batch == null in remoteHandleCallback for batchId=" + batchId, true); 910 return; 911 } 912 // Error handlers inside here indicate an error that is nothing to do 913 // with DWR so we handle them differently. 914 try { 915 var handlers = batch.handlers[callId]; 916 batch.handlers[callId] = null; 917 if (!handlers) { 918 dwr.engine._debug("Warning: Missing handlers. callId=" + callId, true); 919 } 920 else if (typeof handlers.callback == "function") handlers.callback(reply); 921 }
922 catch (ex) { 923 dwr.engine._handleError(batch, ex); 924 } 925}; 926 927/** @private Called by the server: Handle an exception for a call */ 928dwr.engine._remoteHandleException = function(batchId, callId, ex) { 929 var batch = dwr.engine._batches[batchId]; 930 if (batch == null) { dwr.engine._debug("Warning: null batch in remoteHandleException", true); return; } 931 var handlers = batch.handlers[callId]; 932 batch.handlers[callId] = null; 933 if (handlers == null) { dwr.engine._debug("Warning: null handlers in remoteHandleException", true); return; } 934 if (ex.message == undefined) ex.message = ""; 935 if (typeof handlers.exceptionHandler == "function") handlers.exceptionHandler(ex.message, ex); 936 else if (typeof batch.errorHandler == "function") batch.errorHandler(ex.message, ex); 937}; 938 939/** @private Called by the server: The whole batch is broken */ 940dwr.engine._remoteHandleBatchException = function(ex, batchId) { 941 var searchBatch = (dwr.engine._receivedBatch == null && batchId != null); 942 if (searchBatch) { 943 dwr.engine._receivedBatch = dwr.engine._batches[batchId]; 944 } 945 if (ex.message == undefined) ex.message = ""; 946 dwr.engine._handleError(dwr.engine._receivedBatch, ex); 947 if (searchBatch) { 948 dwr.engine._receivedBatch = null; 949 dwr.engine._clearUp(dwr.engine._batches[batchId]); 950 } 951}; 952 953/** @private Called by the server: Reverse ajax should not be used */ 954dwr.engine._remotePollCometDisabled = function(ex, batchId) { 955 dwr.engine.setActiveReverseAjax(false); 956 var searchBatch = (dwr.engine._receivedBatch == null && batchId != null); 957 if (searchBatch) { 958 dwr.engine._receivedBatch = dwr.engine._batches[batchId]; 959 } 960 if (ex.message == undefined) ex.message = ""; 961 dwr.engine._handleError(dwr.engine._receivedBatch, ex); 962 if (searchBatch) { 963 dwr.engine._receivedBatch = null; 964 dwr.engine._clearUp(dwr.engine._batches[batchId]); 965 } 966}; 967 968/** @private Called by the server: An IFrame reply is about to start */ 969dwr.engine._remoteBeginIFrameResponse = function(iframe, batchId) { 970 if (iframe != null) dwr.engine._receivedBatch = iframe.batch; 971 dwr.engine._callPostHooks(dwr.engine._receivedBatch); 972}; 973 974/** @private Called by the server: An IFrame reply is just completing */ 975dwr.engine._remoteEndIFrameResponse = function(batchId) { 976 dwr.engine._clearUp(dwr.engine._receivedBatch); 977 dwr.engine._receivedBatch = null; 978}; 979 980/** @private This is a hack to make the context be this window */ 981dwr.engine._eval = function(script) { 982 if (script == null) return null; 983 if (script == "") { dwr.engine._debug("Warning: blank script", true); return null; } 984 // dwr.engine._debug("Exec: [" + script + "]", true); 985 return eval(script); 986}; 987 988/** @private Called as a result of a request timeout */ 989dwr.engine._abortRequest = function(batch) { 990 if (batch && !batch.completed) { 991 dwr.engine._clearUp(batch); 992 if (batch.req) batch.req.abort(); 993 dwr.engine._handleError(batch, { name:"dwr.engine.timeout", message:"Timeout" }); 994 } 995}; 996 997/** @private call all the post hooks for a batch */ 998dwr.engine._callPostHooks = function(batch) { 999 if (batch.postHooks) { 1000 for (var i = 0; i < batch.postHooks.length; i++) { 1001 batch.postHooks[i](); 1002 } 1003 batch.postHooks = null; 1004 } 1005}; 1006 1007/** @private A call has finished by whatever means and we need to shut it all down. */ 1008dwr.engine._clearUp = function(batch) { 1009 if (!batch) { dwr.engine._debug("Warning: null batch in dwr.engine._clearUp()", true); return; } 1010 if (batch.completed) { dwr.engine._debug("Warning: Double complete", true); return; } 1011 1012 // IFrame tidyup 1013 if (batch.div) batch.div.parentNode.removeChild(batch.div); 1014 if (batch.iframe) { 1015 // If this is a poll frame then stop comet polling 1016 for (var i = 0; i < dwr.engine._outstandingIFrames.length; i++) { 1017 if (dwr.engine._outstandingIFrames[i] == batch.iframe) { 1018 dwr.engine._outstandingIFrames.splice(i, 1); 1019 } 1020 } 1021 batch.iframe.parentNode.removeChild(batch.iframe); 1022 } 1023 if (batch.form) batch.form.parentNode.removeChild(batch.form); 1024 1025 // XHR tidyup: avoid IE handles increase 1026 if (batch.req) { 1027 // If this is a poll frame then stop comet polling 1028 if (batch.req == dwr.engine._pollReq) dwr.engine._pollReq = null; 1029 delete batch.req; 1030 } 1031 1032 // Timeout tidyup 1033 if (batch.timeoutId != null) { 1034 clearTimeout(batch.timeoutId); 1035 delete batch.timeoutId; 1036 } 1037 1038 if (batch.map && (batch.map.batchId || batch.map.batchId == 0)
1038) { 1039 delete dwr.engine._batches[batch.map.batchId]; 1040 dwr.engine._batchesLength--; 1041 } 1042 1043 batch.completed = true; 1044 1045 // If there is anything on the queue waiting to go out, then send it. 1046 // We don't need to check for ordered mode, here because when ordered mode 1047 // gets turned off, we still process *waiting* batches in an ordered way. 1048 if (dwr.engine._batchQueue.length != 0) { 1049 var sendbatch = dwr.engine._batchQueue.shift(); 1050 dwr.engine._sendData(sendbatch); 1051 } 1052}; 1053 1054/** @private Abort any XHRs in progress at page unload (solves zombie socket problems in IE). */ 1055dwr.engine._unloader = function() { 1056 dwr.engine._unloading = true; 1057 1058 // Empty queue of waiting ordered requests 1059 dwr.engine._batchQueue.length = 0; 1060 1061 // Abort any ongoing XHRs and clear their batches 1062 for (var batchId in dwr.engine._batches) { 1063 var batch = dwr.engine._batches[batchId]; 1064 // Only process objects that look like batches (avoid prototype additions!) 1065 if (batch && batch.map) { 1066 if (batch.req) { 1067 batch.req.abort(); 1068 } 1069 dwr.engine._clearUp(batch); 1070 } 1071 } 1072}; 1073// Now register the unload handler 1074if (window.addEventListener) window.addEventListener('unload', dwr.engine._unloader, false); 1075else if (window.attachEvent) window.attachEvent('onunload', dwr.engine._unloader); 1076 1077/** @private Generic error handling routing to save having null checks everywhere */ 1078dwr.engine._handleError = function(batch, ex) { 1079 if (typeof ex == "string") ex = { name:"unknown", message:ex }; 1080 if (ex.message == null) ex.message = ""; 1081 if (ex.name == null) ex.name = "unknown"; 1082 if (batch && typeof batch.errorHandler == "function") batch.errorHandler(ex.message, ex); 1083 else if (dwr.engine._errorHandler) dwr.engine._errorHandler(ex.message, ex); 1084 if (batch) dwr.engine._clearUp(batch); 1085}; 1086 1087/** @private Generic error handling routing to save having null checks everywhere */ 1088dwr.engine._handleWarning = function(batch, ex) { 1089 if (typeof ex == "string") ex = { name:"unknown", message:ex }; 1090 if (ex.message == null) ex.message = ""; 1091 if (ex.name == null) ex.name = "unknown"; 1092 if (batch && typeof batch.warningHandler == "function") batch.warningHandler(ex.message, ex); 1093 else if (dwr.engine._warningHandler) dwr.engine._warningHandler(ex.message, ex); 1094 if (batch) dwr.engine._clearUp(batch); 1095}; 1096 1097/** 1098 * @private Marshall a data item 1099 * @param batch A map of variables to how they have been marshalled 1100 * @param referto An array of already marshalled variables to prevent recurrsion 1101 * @param data The data to be marshalled 1102 * @param name The name of the data being marshalled 1103 */ 1104dwr.engine._serializeAll = function(batch, referto, data, name) { 1105 if (data == null) { 1106 batch.map[name] = "null:null"; 1107 return; 1108 } 1109 1110 switch (typeof data) { 1111 case "boolean": 1112 batch.map[name] = "boolean:" + data; 1113 break; 1114 case "number": 1115 batch.map[name] = "number:" + data; 1116 break; 1117 case "string": 1118 batch.map[name] = "string:" + encodeURIComponent(data); 1119 break; 1120 case "object": 1121 var objstr = Object.prototype.toString.call(data); 1122 if (objstr == "[object String]") batch.map[name] = "String:" + encodeURIComponent(data); 1123 else if (objstr == "[object Boolean]") batch.map[name] = "Boolean:" + data; 1124 else if (objstr == "[object Number]") batch.map[name] = "Number:" + data; 1125 else if (objstr == "[object Date]") batch.map[name] = "Date:" + data.getTime(); 1126 else if (objstr == "[object Array]") batch.map[name] = dwr.engine._serializeArray(batch, referto, data, name); 1127 else batch.map[name] = dwr.engine._serializeObject(batch, referto, data, name); 1128 break; 1129 case "function": 1130 // We just ignore functions. 1131 break; 1132 default: 1133 dwr.engine._handleWarning(null, { name:"dwr.engine.unexpectedType", message:"Unexpected type: " + typeof data + ", attempting default converter." }); 1134 batch.map[name] = "default:" + data; 1135 break; 1136 } 1137}; 1138 1139/** @private Have we already converted this object? */ 1140dwr.engine._lookup = function(referto, data, name) { 1141 var lookup; 1142 // Can't use a map: getahead.org/ajax/javascript-gotchas 1143 for (var i = 0; i < referto.length; i++) { 1144 if (referto[i].data == data) { 1145 lookup = referto[i]; 1146 break; 1147 } 1148 } 1149 if (lookup) return "reference:" + lookup.name; 1150 referto.push({ data:data, name:name }); 1151 return null; 1152}; 1153 1154/** @private Marshall an object */ 1155dwr.engine._serializeObject = function(batch, referto, data, name) { 1156 var ref = dwr.engine._lookup(referto, data, name); 1157 if (ref) return ref; 1158 1159 // This check for an HTML is not complete, but is there a better way? 1160 // Maybe we should add: data.hasChildNodes typeof "function" == true 1161 if (data.nodeName && data.nodeType) { 1162 return dwr.engine._serializeXml(batch, referto, data, name); 1163 } 1164 1165 // treat objects as an associative arrays
1166 var reply = "Object_" + dwr.engine._getObjectClassName(data) + ":{"; 1167 var element; 1168 for (element in data) { 1169 if (typeof data[element] != "function") { 1170 batch.paramCount++; 1171 var childName = "c" + dwr.engine._batch.map.callCount + "-e" + batch.paramCount; 1172 dwr.engine._serializeAll(batch, referto, data[element], childName); 1173 1174 reply += encodeURIComponent(element) + ":reference:" + childName + ", "; 1175 } 1176 } 1177 1178 if (reply.substring(reply.length - 2) == ", ") { 1179 reply = reply.substring(0, reply.length - 2); 1180 } 1181 reply += "}"; 1182 1183 return reply; 1184}; 1185 1186/** @private Returns the classname of supplied argument obj */ 1187dwr.engine._errorClasses = { "Error":Error, "EvalError":EvalError, "RangeError":RangeError, "ReferenceError":ReferenceError, "SyntaxError":SyntaxError, "TypeError":TypeError, "URIError":URIError }; 1188dwr.engine._getObjectClassName = function(obj) { 1189 // Try to find the classname by stringifying the object's constructor 1190 // and extract <class> from "function <class>". 1191 if (obj && obj.constructor && obj.constructor.toString) 1192 { 1193 var str = obj.constructor.toString(); 1194 var regexpmatch = str.match(/function\s+(\w+)/); 1195 if (regexpmatch && regexpmatch.length == 2) { 1196 return regexpmatch[1]; 1197 } 1198 } 1199 1200 // Now manually test against the core Error classes, as these in some 1201 // browsers successfully match to the wrong class in the 1202 // Object.toString() test we will do later 1203 if (obj && obj.constructor) { 1204 for (var errorname in dwr.engine._errorClasses) { 1205 if (obj.constructor == dwr.engine._errorClasses[errorname]) return errorname; 1206 } 1207 } 1208 1209 // Try to find the classname by calling Object.toString() on the object 1210 // and extracting <class> from "[object <class>]" 1211 if (obj) { 1212 var str = Object.prototype.toString.call(obj); 1213 var regexpmatch = str.match(/\[object\s+(\w+)/); 1214 if (regexpmatch && regexpmatch.length==2) { 1215 return regexpmatch[1]; 1216 } 1217 } 1218 1219 // Supplied argument was probably not an object, but what is better? 1220 return "Object"; 1221}; 1222 1223/** @private Marshall an object */ 1224dwr.engine._serializeXml = function(batch, referto, data, name) { 1225 var ref = dwr.engine._lookup(referto, data, name); 1226 if (ref) return ref; 1227 1228 var output; 1229 if (window.XMLSerializer) output = new XMLSerializer().serializeToString(data); 1230 else if (data.toXml) output = data.toXml; 1231 else output = data.innerHTML; 1232 1233 return "XML:" + encodeURIComponent(output); 1234}; 1235 1236/** @private Marshall an array */ 1237dwr.engine._serializeArray = function(batch, referto, data, name) { 1238 var ref = dwr.engine._lookup(referto, data, name); 1239 if (ref) return ref; 1240 1241 if (document.all && !window.opera) { 1242 // Use array joining on IE (fastest) 1243 var buf = ["Array:["]; 1244 for (var i = 0; i < data.length; i++) { 1245 if (i != 0) buf.push(","); 1246 batch.paramCount++; 1247 var childName = "c" + dwr.engine._batch.map.callCount + "-e" + batch.paramCount; 1248 dwr.engine._serializeAll(batch, referto, data[i], childName); 1249 buf.push("reference:"); 1250 buf.push(childName); 1251 } 1252 buf.push("]"); 1253 reply = buf.join(""); 1254 } 1255 else { 1256 // Use string concat on other browsers (fastest) 1257 var reply = "Array:["; 1258 for (var i = 0; i < data.length; i++) { 1259 if (i != 0) reply += ","; 1260 batch.paramCount++; 1261 var childName = "c" + dwr.engine._batch.map.callCount + "-e" + batch.paramCount; 1262 dwr.engine._serializeAll(batch, referto, data[i], childName); 1263 reply += "reference:"; 1264 reply += childName; 1265 } 1266 reply += "]"; 1267 } 1268 1269 return reply; 1270}; 1271 1272/** @private Convert an XML string into a DOM object. */ 1273dwr.engine._unserializeDocument = function(xml) { 1274 var dom; 1275 if (window.DOMParser) { 1276 var parser = new DOMParser(); 1277 dom = parser.parseFromString(xml, "text/xml"); 1278 if (!dom.documentElement || dom.documentElement.tagName == "parsererror") { 1279 var message = dom.documentElement.firstChild.data; 1280 message += "\n" + dom.documentElement.firstChild.nextSibling.firstChild.data; 1281 throw message; 1282 } 1283 return dom; 1284 } 1285 else if (window.ActiveXObject) {
1286 dom = dwr.engine._newActiveXObject(dwr.engine._DOMDocument); 1287 dom.loadXML(xml); // What happens on parse fail with IE? 1288 return dom; 1289 } 1290 else { 1291 var div = document.createElement("div"); 1292 div.innerHTML = xml; 1293 return div; 1294 } 1295}; 1296 1297/** @param axarray An array of strings to attempt to create ActiveX objects from */ 1298dwr.engine._newActiveXObject = function(axarray) { 1299 var returnValue; 1300 for (var i = 0; i < axarray.length; i++) { 1301 try { 1302 returnValue = new ActiveXObject(axarray[i]); 1303 break; 1304 } 1305 catch (ex) { /* ignore */ } 1306 } 1307 return returnValue; 1308}; 1309 1310/** @private Used internally when some message needs to get to the programmer */ 1311dwr.engine._debug = function(message, stacktrace) { 1312 var written = false; 1313 try { 1314 if (window.console) { 1315 if (stacktrace && window.console.trace) window.console.trace(); 1316 window.console.log(message); 1317 written = true; 1318 } 1319 else if (window.opera && window.opera.postError) { 1320 window.opera.postError(message); 1321 written = true; 1322 } 1323 } 1324 catch (ex) { /* ignore */ } 1325 1326 if (!written) { 1327 var debug = document.getElementById("dwr-debug"); 1328 if (debug) { 1329 var contents = message + "<br/>" + debug.innerHTML; 1330 if (contents.length > 2048) contents = contents.substring(0, 2048); 1331 debug.innerHTML = contents; 1332 } 1333 } 1334}; 1335
Line numbers count LF bytes from the start of the resource, as the search results do. Vendor segments are library code the classifier recognised; they are stored but not indexed. Bytes are shown as Latin1 characters, one per byte.