/*
* Copyright 2005 Joe Walker
*
* 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.
*/
/**
* The DWR object is also defined by dwr.util etc.
*/
if (typeof dojo != 'undefined') dojo.provide('dwr.engine');
if (typeof dwr == 'undefined') dwr = {};
(function() {
dwr.engine = {};
/**
* Set an alternative error handler from the default alert box.
* @param {Function} handler The function to call when an error happens
* @see http://getahead.org/dwr/browser/engine/errors
*/
dwr.engine.setErrorHandler = function(handler) {
dwr.engine._errorHandler = handler;
};
/**
* Set an alternative warning handler from the default alert box.
* @param {Function} handler The function to call when a warning happens
* @see http://getahead.org/dwr/browser/engine/errors
*/
dwr.engine.setWarningHandler = function(handler) {
dwr.engine._warningHandler = handler;
};
/**
* Setter for the text/html handler - what happens if a DWR request gets an HTML
* reply rather than the expected Javascript. Often due to login timeout
* @param {Function} handler The function to call on an unexpected text/html content type
*/
dwr.engine.setTextHtmlHandler = function(handler) {
dwr.engine._textHtmlHandler = handler;
};
/**
* Set a default timeout value for all calls. 0 (the default) turns timeouts off.
* @param {Function} handler The function to call when we get bored of waiting for a call
* @see getahead.org/dwr/browser/engine/errors
*/
dwr.engine.setTimeout = function(timeout) {
dwr.engine._timeout = timeout;
};
/**
* The Pre-Hook is called before any DWR remoting is done.
* @param {Function} handler The function to call before any remote calls
* @see getahead.org/dwr/browser/engine/hooks
*/
dwr.engine.setPreHook = function(handler) {
dwr.engine._preHook = handler;
};
/**
* The Post-Hook is called after any DWR remoting is done.
* @param {Function} handler The function to call after any remote calls
* @see getahead.org/dwr/browser/engine/hooks
*/
dwr.engine.setPostHook = function(handler) {
dwr.engine._postHook = handler;
};
/**
* Custom headers for all DWR calls
* @param {Object} headers Object containing name/value pairs for extra headers
* @see getahead.org/dwr/????
*/
dwr.engine.setHeaders = function(headers) {
dwr.engine._headers = headers;
};
/**
* @Deprecated - use setRequestAttributes
*/
dwr.engine.setParameters = function(parameters) {
dwr.engine.setRequestAttributes(parameters);
};
/**
* Custom request attributes for all DWR calls
* @param {Object} attributes Object containing name/value pairs for request attributes
* @see getahead.org/dwr/????
*/
dwr.engine.setRequestAttributes = function(attributes) {
dwr.engine._requestAttributes = attributes;
};
/**
* Ensure that remote calls happen in the order in which they were sent? (Default: false)
* @param {boolean} ordered true to enable ordered processing
* @see getahead.org/dwr/browser/engine/ordering
*/
dwr.engine.setOrdered = function(ordered) {
dwr.engine._ordered = ordered;
};
/**
* Do we ask the XHR object to be asynchronous? (Default: true)
* Warning: it is highly advised to use the default ofasync
* processing, especially when dealing with Internet based requests.
* @param {boolean} async false to enable sync processing for XHR queries
* @see getahead.org/dwr/browser/engine/options
*/
dwr.engine.setAsync = function(async) {
dwr.engine._async = async;
};
/**
* Does the client actively check the server for updates? (Default: false)
* @param {boolean} async true to enable low latency reverse ajax
* @see getahead.org/dwr/browser/engine/options
*/
dwr.engine.setActiveReverseAjax = function(activeReverseAjax) {
if (activeReverseAjax) {
// Bail if we are already started
if (dwr.engine._activeReverseAjax) return;
// We always want a retry policy when reverse AJAX is enabled.
dwr.engine._retryIntervals = dwr.engine._defaultRetryIntervals;
dwr.engine._activeReverseAjax = true;
dwr.engine._poll();
}
else {
// Can we cancel an existing request?
if (dwr.engine._activeReverseAjax && dwr.engine._pollReq) {
dwr.engine._pollReq.abort();
}
dwr.engine._activeReverseAjax = false;
}
// TODO: in iframe mode, if we start, stop, start then the second start may
// well kick off a second iframe while the first is still about to return
// we should cope with this but we don't
};
/**
* Turn server notification of page unload on and off
* @param {boolean} notify true or false depending on if we want to turn unload on or off
* @see getahead.org/dwr/browser/engine/options
*/
dwr.engine.setNotifyServerOnPageUnload = function(notify) {
dwr.engine._isNotifyServerOnPageUnload = notify;
};
/*
* The maximum number of retries before failure.
* @param - maxRetries - The maximum number of retries before failure.
*/
dwr.engine.setMaxRetries = function(maxRetries) {
dwr.engine._maxRetries = maxRetries;
};
/*
* The intervals between successive retries in seconds
* @param - array of integers representing the retry interval in seconds.
*/
dwr.engine.setRetryIntervals = function(intervalsArray) {
dwr.engine._retryIntervals = intervalsArray;
};
/**
* The default message handler.
* @param {String} message The text of the error message
* @param {Object} ex An error object containing at least a name and message
* @see getahead.org/dwr/browser/engine/errors
*/
dwr.engine.defaultErrorHandler = function(message, ex) {
dwr.engine._debug("Error: " + ex.name + ", " + ex.message, true);
if (message == null || message == "") alert("A server error has occurred.");
// Ignore NS_ERROR_NOT_AVAILABLE if Mozilla is being narky
//else if (message.indexOf("0x80040111") != -1) dwr.engine._debug(message);
//else alert(message);
};
/**
* The default warning handler.
* @param {String} message The text of the error message
* @param {Object} ex An error object containing at least a name and message
* @see getahead.org/dwr/browser/engine/errors
*/
dwr.engine.defaultWarningHandler = function(message, ex) {
dwr.engine._debug(message);
};
/**
* For reduced latency you can group several remote calls together using a batch.
* @see getahead.org/dwr/browser/engine/batch
*/
dwr.engine.beginBatch = function() {
if (dwr.engine._batch) {
dwr.engine._handleError(null, { name:"dwr.engine.batchBegun", message:"Batch already begun" });
return;
}
dwr.engine._batch = dwr.engine.batch.create();
};
/**
* Finished grouping a set of remote calls together. Go and execute them all.
* @param {Object} options A options object to customize processing
* @see getahead.org/dwr/browser/engine/batch
*/
dwr.engine.endBatch = function(options) {
var batch = dwr.engine._batch;
if (batch == null) {
dwr.engine._handleError(null, { name:"dwr.engine.batchNotBegun", message:"No batch in progress" });
return;
}
dwr.engine._batch = null;
if (batch.map.callCount == 0) {
return;
}
// The hooks need to be merged carefully to preserve ordering
if (options) {
dwr.engine.batch.merge(batch, options);
}
// In ordered mode, we don't send unless the list of sent items is empty
if (dwr.engine._ordered && dwr.engine._batchesLength != 0) {
dwr.engine._batchQueue[dwr.engine._batchQueue.length] = batch;
}
else {
return dwr.engine.transport.send(batch);
}
};
/**
* For use with file downloads. When a DWR function returns a binary download
* you can prompt the user to save it using this function
* @param {Object} data The binary data passed from DWR
*/
dwr.engine.openInDownload = function(data) {
var div = document.createElement("div");
document.body.appendChild(div);
div.innerHTML = "";
};
/**
* What is the current version DWR number
* DWR version numbers are of the form "Version 1.2.3.3128[.beta]", where:
* 1 is the major release number. Changes in major version number indicate
* significant enhancements in functionality
* 2 is the minor release number. Changes in minor version number indicate
* less significant changes in functionality
* 3 is the revision release number. Changes here typically indicate bug
* fixes only
* 3128 is the build number. This number increments for each build
* .beta is a release title that is generally only used for non production
* releases to indicate the purpose/quality of the release
* The label is these strings concatenated
*/
dwr.version = {
/**
* Changes in major version number indicate significant enhancements
*/
major:parseInt("3"),
/**
* Changes in minor version number indicate smaller enhancements
*/
minor:parseInt("0"),
/**
* Changes with the revision number typically indicate bug-fixes only
*/
revision:parseInt("0"),
/**
* The build number increments for each build
*/
build:parseInt("116"),
/**
* Only used for non production releases to indicate the purpose/quality of
* the release. Example titles include 'milestone1' or 'beta3'.
*/
title:"rc1",
/**
* The strings above concatenated
*/
label:"3.0.0.116.rc1"
};
//==============================================================================
// Only private stuff below here
//==============================================================================
/** The session cookie name */
dwr.engine._sessionCookieName = "JSESSIONID"; // JSESSIONID
/** Is GET enabled for the benefit of Safari? */
dwr.engine._allowGetForSafariButMakeForgeryEasier = "false";
/** The script prefix to strip in the case of scriptTagProtection. */
dwr.engine._scriptTagProtection = "throw 'allowScriptTagRemoting is false.';";
/** The default path to the DWR servlet */
dwr.engine._pathToDwrServlet = "/dwr";
/** Do we use XHR for reverse ajax because we are not streaming? */
dwr.engine._pollWithXhr = "false";
/** These URLs can be configured from the server */
dwr.engine._ModePlainCall = "/call/plaincall/";
dwr.engine._ModePlainPoll = "/call/plainpoll/";
dwr.engine._ModeHtmlCall = "/call/htmlcall/";
dwr.engine._ModeHtmlPoll = "/call/htmlpoll/";
/** Do we make the calls async? Default to 'true' */
dwr.engine._async = Boolean("true");
/** The page id */
dwr.engine._scriptSessionId = null;
/** A function to be called before requests are marshalled. Can be null. */
dwr.engine._preHook = null;
/** A function to be called after replies are received. Can be null. */
dwr.engine._postHook = null;
/** A map of the batches that we have sent and are awaiting a reply on. */
dwr.engine._batches = {};
/** A count of the number of outstanding batches. Should be == to _batches.length unless prototype has messed things up */
dwr.engine._batchesLength = 0;
/** In ordered mode, the array of batches waiting to be sent */
dwr.engine._batchQueue = [];
/** Do we attempt to ensure that calls happen in the order in which they were
sent? This starts true until we have fetched the ids, when it is to false */
dwr.engine._ordered = true;
/** The current batch (if we are in batch mode) */
dwr.engine._batch = null;
/** The global timeout */
dwr.engine._timeout = 0;
/** Are we doing comet or polling? */
dwr.engine._activeReverseAjax = false;
/** The xhr object that we are using to poll */
dwr.engine._pollReq = null;
/** How many milliseconds between internal comet polls */
dwr.engine._pollCometInterval = 200;
/** How many times have we re-tried a call? */
dwr.engine._retries = 0;
dwr.engine._maxRetries = 10;
/** The intervals between successive retries in seconds */
dwr.engine._retryIntervals = [];
/** Used as the default for reverse ajax/polling */
dwr.engine._defaultRetryIntervals = [ 2, 5, 10, 60, 300 ];
/** Do we do a document.reload if we get a text/html reply? */
dwr.engine._textHtmlHandler = null;
/** If you wish to send custom headers with every request */
dwr.engine._headers = null;
/** If you wish to send extra custom request attributes with each request */
dwr.engine._requestAttributes = null;
/** Batch ids allow us to know which batch the server is answering */
dwr.engine._nextBatchId = 0;
/** A list of the properties that need merging from calls to a batch */
dwr.engine._propnames = [ "async", "timeout", "errorHandler", "warningHandler", "textHtmlHandler" ];
/** Do we stream, or can be hacked to do so? */
dwr.engine._partialResponseNo = 0;
dwr.engine._partialResponseYes = 1;
dwr.engine._partialResponseFlush = 2;
/** Are we doing page unloading? */
dwr.engine._isNotifyServerOnPageUnload = false;
/**
* A map of all mapped classes whose class declarations have been loaded
* (dwrClassName -> constructor function)
* This could have been pre-created by interface scripts, so we need to check.
*/
if (typeof dwr.engine._mappedClasses == 'undefined') {
dwr.engine._mappedClasses = {};
}
/**
* Find the HTTP session id sent by the web server
* @private
*/
dwr.engine._getHttpSessionId = function() {
// try to find the httpSessionId
var cookies = document.cookie.split(';');
for (var i = 0; i < cookies.length; i++) {
var cookie = cookies[i];
while (cookie.charAt(0) == ' ') cookie = cookie.substring(1, cookie.length);
if (cookie.indexOf(dwr.engine._sessionCookieName + "=") == 0) {
return cookie.substring(dwr.engine._sessionCookieName.length + 1, cookie.length);
}
}
return "";
};
/** A function to call if something fails. */
dwr.engine._errorHandler = dwr.engine.defaultErrorHandler;
/** For debugging when something unexplained happens. */
dwr.engine._warningHandler = dwr.engine.defaultWarningHandler;
/** Undocumented interceptors - do not use */
dwr.engine._postSeperator = "\n";
dwr.engine._defaultInterceptor = function(data) { return data; };
dwr.engine._urlRewriteHandler = dwr.engine._defaultInterceptor;
dwr.engine._contentRewriteHandler = dwr.engine._defaultInterceptor;
dwr.engine._replyRewriteHandler = dwr.engine._defaultInterceptor;
/** Is this page in the process of unloading? */
dwr.engine._unloading = false;
/** @private Abort any XHRs in progress at page unload (solves zombie socket problems in IE). */
dwr.engine._unloader = function() {
dwr.engine._unloading = true;
// Empty queue of waiting ordered requests
dwr.engine._batchQueue.length = 0;
// Abort any ongoing XHRs and clear their batches
var batch;
for (var batchId in dwr.engine._batches) {
batch = dwr.engine._batches[batchId];
// Only process objects that look like batches (avoid prototype additions!)
if (batch && batch.map) {
if (batch.req) {
batch.req.abort();
}
}
}
// If we have used reverse ajax then we try to tell the server we are gone
if (dwr.engine._isNotifyServerOnPageUnload) {
dwr.engine._debug("calling unloader for: " + dwr.engine._scriptSessionId);
batch = {
map:{
callCount:1,
'c0-scriptName':'__System',
'c0-methodName':'pageUnloaded',
'c0-id':0
},
paramCount:0, isPoll:false, async:true,
headers:{}, preHooks:[], postHooks:[],
timeout:dwr.engine._timeout,
errorHandler:null, warningHandler:null, textHtmlHandler:null,
path:dwr.engine._pathToDwrServlet,
handlers:[{ exceptionHandler:null, callback:null }]
};
dwr.engine.transport.send(batch);
dwr.engine._isNotifyServerOnPageUnload = false;
}
};
// Now register the unload handler
if (!dwr.engine.isJaxerServer) {
if (window.addEventListener) window.addEventListener('unload', dwr.engine._unloader, false);
else if (window.attachEvent) window.attachEvent('onunload', dwr.engine._unloader);
}
/**
* Send a request. Called by the JavaScript interface stub
* @private
* @param path part of URL after the host and before the exec bit without leading or trailing /s
* @param scriptName The class to execute
* @param methodName The method on said class to execute
* @param func The callback function to which any returned data should be passed
* if this is null, any returned data will be ignored
* @param args The parameters to passed to the above method
*/
dwr.engine._execute = function(path, scriptName, methodName, args) {
var singleShot = false;
if (dwr.engine._batch == null) {
dwr.engine.beginBatch();
singleShot = true;
}
var batch = dwr.engine._batch;
// All the paths MUST be to the same servlet
if (batch.path == null) {
batch.path = path;
}
else {
if (batch.path != path) {
dwr.engine._handleError(batch, { name:"dwr.engine.multipleServlets", message:"Can't batch requests to multiple DWR Servlets." });
return;
}
}
dwr.engine.batch.addCall(batch, scriptName, methodName, args);
// Now we have finished remembering the call, we increment the call count
batch.map.callCount++;
if (singleShot) {
return dwr.engine.endBatch();
}
};
/**
* Poll the server to see if there is any data waiting
* @private
*/
dwr.engine._poll = function() {
if (!dwr.engine._activeReverseAjax) {
return;
}
var batch = dwr.engine.batch.createPoll();
dwr.engine.transport.send(batch);
};
/**
* Try to recover from errors
* @param {Object} msg
* @param {Object} ex
*/
dwr.engine._retryHandler = function(batch, ex) {
if (dwr.engine._retries >= dwr.engine._maxRetries) {
dwr.engine._activeReverseAjax = false;
if (batch && typeof batch.errorHandler == "function") {
batch.errorHandler(ex.message, ex);
} else if (dwr.engine._errorHandler) {
dwr.engine._errorHandler(ex.message, ex);
}
if (batch) dwr.engine.batch.remove(batch);
return;
}
var index = dwr.engine._retries;
if (index >= dwr.engine._retryIntervals.length) {
index = dwr.engine._retryIntervals.length - 1;
}
dwr.engine._debug("Reverse Ajax poll failed (retries=" + dwr.engine._retries + "). Trying again in " + dwr.engine._retryIntervals[index] + "s: " + ex.name + " : " + ex.message);
setTimeout(dwr.engine._poll, 1000 * dwr.engine._retryIntervals[index]);
dwr.engine._retries++;
};
/** @private This is a hack to make the context be this window */
dwr.engine._eval = function(script) {
if (script == null) {
return null;
}
if (script == "") {
dwr.engine._debug("Warning: blank script", true);
return null;
}
// dwr.engine._debug("Exec: [" + script + "]", true);
return eval(script);
};
/** @private call all the post hooks for a batch */
dwr.engine._callPostHooks = function(batch) {
if (batch.postHooks) {
for (var i = 0; i < batch.postHooks.length; i++) {
batch.postHooks[i]();
}
batch.postHooks = null;
}
};
/**
* Generic error handling routing to save having null checks everywhere
* @private
* @param {Object} batch
* @param {Object} ex
*/
dwr.engine._handleError = function(batch, ex) {
dwr.engine._prepareException(ex);
// If a retry policy has been specified, call the retryHandler.
if (dwr.engine._retryIntervals.length > 0) {
dwr.engine._retryHandler(batch, ex);
} else {
if (batch && typeof batch.errorHandler == "function") batch.errorHandler(ex.message, ex);
else if (dwr.engine._errorHandler) dwr.engine._errorHandler(ex.message, ex);
if (batch) dwr.engine.batch.remove(batch);
}
};
/**
* Generic error handling routing to save having null checks everywhere
* @private
* @param {Object} batch
* @param {Object} ex
*/
dwr.engine._handleWarning = function(batch, ex) {
dwr.engine._prepareException(ex);
// If a retry policy has been specified, call the retryHandler.
if (dwr.engine._retryIntervals.length > 0) {
return dwr.engine._retryHandler(batch, ex);
} else {
if (batch && typeof batch.warningHandler == "function") batch.warningHandler(ex.message, ex);
else if (dwr.engine._warningHandler) dwr.engine._warningHandler(ex.message, ex);
if (batch) dwr.engine.batch.remove(batch);
}
};
/**
* Prepares an exception for an error/warning handler.
* @private
* @param {Object} ex
*/
dwr.engine._prepareException = function(ex) {
if (typeof ex == "string") ex = { name:"unknown", message:ex };
if (ex.message == null) ex.message = "";
if (ex.name == null) ex.name = "unknown";
};
/**
* Used internally when some message needs to get to the programmer
* @private
* @param {String} message
* @param {Object} stacktrace
*/
dwr.engine._debug = function(message, stacktrace) {
var written = false;
try {
if (window.console) {
if (stacktrace && window.console.trace) window.console.trace();
window.console.log(message);
written = true;
}
else if (window.opera && window.opera.postError) {
window.opera.postError(message);
written = true;
}
else if (window.Jaxer && Jaxer.isOnServer) {
Jaxer.Log.info(message);
written = true;
}
}
catch (ex) { /* ignore */ }
if (!written) {
var debug = document.getElementById("dwr-debug");
if (debug) {
var contents = message + "
" + debug.innerHTML;
if (contents.length > 2048) contents = contents.substring(0, 2048);
debug.innerHTML = contents;
}
}
};
/**
* Functions called by the server
*/
dwr.engine.remote = {
/**
* Execute a callback
* @private
* @param {int} batchId The ID of the batch that we are replying to
* @param {int} callId The call ID that the script relates to
* @param {String} reply The script to execute
*/
handleCallback:function(batchId, callId, reply) {
var batch = dwr.engine._batches[batchId];
if (batch == null) {
dwr.engine._debug("Warning: batch == null in remoteHandleCallback for batchId=" + batchId, true);
return;
}
// We store the reply in the batch so that in sync mode we can return the data
batch.reply = reply;
// Error handlers inside here indicate an error that is nothing to do
// with DWR so we handle them differently.
try {
var handlers = batch.handlers[callId];
if (!handlers) {
dwr.engine._debug("Warning: Missing handlers. callId=" + callId, true);
}
else {
batch.handlers[callId].completed = true;
if (typeof handlers.callback == "function") {
handlers.callback.apply(handlers.callbackScope, [ reply, handlers.callbackArg ]);
}
}
}
catch (ex) {
dwr.engine._handleError(batch, ex);
}
},
/**
* Called by the server when a JavascriptFunction is executed
* @param id The ID of the serialized function
* @param args The arguments to pass to the function
*/
handleFunctionCall:function(id, args) {
var func = dwr.engine.serialize.remoteFunctions[id];
func.apply(window, args);
},
/**
* Called by the server when a JavascriptFunction is executed
* @param id The ID of the serialized function
* @param args The arguments to pass to the function
*/
handleObjectCall:function(id, methodName, args) {
var obj = dwr.engine.serialize.remoteFunctions[id];
obj[methodName].apply(obj, args);
},
/**
* Called by the server when a JavascriptFunction is executed
* @param propertyName The ID of the serialized function
* @param data The arguments to pass to the function
*/
handleSetCall:function(id, propertyName, data) {
var obj = dwr.engine.serialize.remoteFunctions[id];
obj[propertyName] = data;
},
/**
* Called by the server when a JavascriptFunction is closed
* @param id The ID of the serialized function
*/
handleFunctionClose:function(id) {
delete dwr.engine.serialize.remoteFunctions[id];
},
/**
* Called by the server: Handle an exception for a call
* @private
* @param {int} batchId The ID of the batch that we are replying to
* @param {int} callId The call ID that the script relates to
* @param {String} reply The script to execute
*/
handleException:function(batchId, callId, ex) {
var batch = dwr.engine._batches[batchId];
if (batch == null) {
dwr.engine._debug("Warning: null batch in remoteHandleException", true);
return;
}
var handlers = batch.handlers[callId];
batch.handlers[callId].completed = true;
if (handlers == null) {
dwr.engine._debug("Warning: null handlers in remoteHandleException", true);
return;
}
if (ex.message == undefined) {
ex.message = "";
}
if (typeof handlers.exceptionHandler == "function") {
handlers.exceptionHandler.call(handlers.exceptionScope, ex.message, ex, handlers.exceptionArg);
}
else if (typeof batch.errorHandler == "function") {
batch.errorHandler(ex.message, ex);
}
},
/**
* Called by the server: The whole batch is broken
* @private
* @param {Object} ex The data about what broke
* @param {int} batchId The ID of the batch that we are replying to
*/
handleBatchException:function(ex, batchId) {
var searchBatch = (dwr.engine._receivedBatch == null && batchId != null);
if (searchBatch) {
dwr.engine._receivedBatch = dwr.engine._batches[batchId];
}
if (ex.message == undefined) ex.message = "";
dwr.engine._handleError(dwr.engine._receivedBatch, ex);
if (searchBatch) {
dwr.engine._receivedBatch = null;
dwr.engine.batch.remove(dwr.engine._batches[batchId]);
}
},
/**
* Called by the server when we need to set a new script session id
* @param {Object} newSessionId The new script session id to be used from now
*/
handleNewScriptSession:function(newSessionId) {
if (dwr.engine._scriptSessionId != null) {
dwr.engine._debug("Server side script session id timed out. New session automatically created");
}
dwr.engine._scriptSessionId = newSessionId;
},
/**
* Called by the server when we need to set a new script session id
* @param {Object} newSessionId The new script session id to be used from now
*/
handleNewWindowName:function(windowName) {
dwr.engine._debug("Setting new window name: " + windowName);
if (window.name != null && window.name != "") {
dwr.engine._debug("- Warning: This will override existing name of: " + window.name);
}
window.name = windowName;
},
/**
* Execute some script in a different window
* @param {Object} windowName The name of the window in which to eval the script
* @param {Object} script The script to eval elsewhere
*/
handleForeign:function(windowName, script) {
var foreign = window.open(null, windowName);
if (foreign != null) {
if (foreign.dwr != null) {
foreign.dwr.engine._eval(script);
}
else {
dwr.engine._debug("Found window, but DWR did not exist in it");
}
}
else {
dwr.engine._debug("Could not find window");
}
},
/**
* Called by the server: Reverse ajax should not be used
* @private
* @param {Object} ex
* @param {int} batchId
*/
pollCometDisabled:function(ex, batchId){
dwr.engine.setActiveReverseAjax(false);
var searchBatch = (dwr.engine._receivedBatch == null && batchId != null);
if (searchBatch) {
dwr.engine._receivedBatch = dwr.engine._batches[batchId];
}
if (ex.message == undefined) {
ex.message = "";
}
dwr.engine._handleError(dwr.engine._receivedBatch, ex);
if (searchBatch) {
dwr.engine._receivedBatch = null;
dwr.engine.batch.remove(dwr.engine._batches[batchId]);
}
},
/**
* Called by the server: Create a new object of a mapped class
* @private
* @param {string} dwrClassName the name of the mapped class
* @param {Object} memberMap the object's data members
*/
newObject:function(dwrClassName, memberMap){
var classfunc = dwr.engine._mappedClasses[dwrClassName];
if (classfunc && classfunc.createFromMap) {
return classfunc.createFromMap(memberMap);
}
else {
memberMap.$dwrClassName = dwrClassName;
return memberMap;
}
}
};
/**
* Functions to serialize a data set into a list of parameters
*/
dwr.engine.serialize = {
/**
* ActiveX objects to use when we want to convert an xml string into a DOM object
*/
domDocument:[
"Msxml2.DOMDocument.6.0",
"Msxml2.DOMDocument.5.0",
"Msxml2.DOMDocument.4.0",
"Msxml2.DOMDocument.3.0",
"MSXML2.DOMDocument",
"MSXML.DOMDocument",
"Microsoft.XMLDOM"
],
/**
* A holder for functions that we have serialized for remote calling.
*/
remoteFunctions:{},
/**
* The ID of the next function that we serialize
*/
funcId:0,
/**
* Convert a text representation of XML into a DOM element
* @param {String} xml An xml string
*/
toDomElement:function(xml) {
return dwr.engine.serialize.toDomDocument(xml).documentElement;
},
/**
* Convert a text representation of XML into a DOM document
* @param {String} xml An xml string
*/
toDomDocument:function(xml) {
var dom;
if (window.DOMParser) {
var parser = new DOMParser();
dom = parser.parseFromString(xml, "text/xml");
if (!dom.documentElement || dom.documentElement.tagName == "parsererror") {
var message = dom.documentElement.firstChild.data;
message += "\n" + dom.documentElement.firstChild.nextSibling.firstChild.data;
throw message;
}
return dom;
}
else if (window.ActiveXObject) {
dom = dwr.engine.util.newActiveXObject(dwr.engine.serialize.domDocument);
dom.loadXML(xml); // What happens on parse fail with IE?
return dom;
}
else {
var div = document.createElement("div");
div.innerHTML = xml;
return div;
}
},
/**
* Marshall a data item
* @private
* @param batch A map of variables to how they have been marshalled
* @param referto An array of already marshalled variables to prevent recurrsion
* @param data The data to be marshalled
* @param name The name of the data being marshalled
*/
convert:function(batch, referto, data, name, depth) {
if (data == null) {
batch.map[name] = "null:null";
return;
}
switch (typeof data) {
case "boolean":
batch.map[name] = "boolean:" + data;
break;
case "number":
batch.map[name] = "number:" + data;
break;
case "string":
batch.map[name] = "string:" + encodeURIComponent(data);
break;
case "object":
var ref = dwr.engine.serialize.lookup(referto, data, name);
var objstr = Object.prototype.toString.call(data);
if (data.$dwrByRef) batch.map[name] = dwr.engine.serialize.convertByReference(batch, referto, data, name, depth + 1);
else if (ref != null) batch.map[name] = ref;
else if (objstr == "[object String]") batch.map[name] = "string:" + encodeURIComponent(data);
else if (objstr == "[object Boolean]") batch.map[name] = "boolean:" + data;
else if (objstr == "[object Number]") batch.map[name] = "number:" + data;
else if (objstr == "[object Date]") batch.map[name] = "date:" + data.getTime();
else if (objstr == "[object Array]") batch.map[name] = dwr.engine.serialize.convertArray(batch, referto, data, name, depth + 1);
else if (data && data.tagName && data.tagName.toLowerCase() == "input" && data.type && data.type.toLowerCase() == "file") {
batch.fileUpload = true;
batch.map[name] = data;
}
else {
// This check for an HTML is not complete, but is there a better way?
// Maybe we should add: data.hasChildNodes typeof "function" == true
if (data.nodeName && data.nodeType) {
batch.map[name] = dwr.engine.serialize.convertXml(batch, referto, data, name, depth + 1);
}
else {
batch.map[name] = dwr.engine.serialize.convertObject(batch, referto, data, name, depth + 1);
}
}
break;
case "function":
// Ignore functions unless they are directly passed in
if (depth == 0) {
batch.map[name] = dwr.engine.serialize.convertByReference(batch, referto, data, name, depth + 1);
}
break;
default:
dwr.engine._handleWarning(null, { name:"dwr.engine.unexpectedType", message:"Unexpected type: " + typeof data + ", attempting default converter." });
batch.map[name] = "default:" + data;
break;
}
},
/**
* Marshall an object by reference
* @private
* @see dwr.engine.serialize.convert() for parameter details
*/
convertByReference:function(batch, referto, data, name, depth) {
var funcId = "f" + dwr.engine.serialize.funcId;
dwr.engine.serialize.remoteFunctions[funcId] = data;
dwr.engine.serialize.funcId++;
return "byref:" + funcId;
},
/**
* Marshall an array
* @private
* @see dwr.engine.serialize.convert() for parameter details
*/
convertArray:function(batch, referto, data, name, depth) {
var childName, i;
if (dwr.engine.isIE <= 7) {
// Use array joining on IE1-7 (fastest)
var buf = ["array:["];
for (i = 0; i < data.length; i++) {
if (i != 0) buf.push(",");
batch.paramCount++;
childName = "c" + dwr.engine._batch.map.callCount + "-e" + batch.paramCount;
dwr.engine.serialize.convert(batch, referto, data[i], childName, depth + 1);
buf.push("reference:");
buf.push(childName);
}
buf.push("]");
reply = buf.join("");
}
else {
// Use string concat on other browsers (fastest)
var reply = "array:[";
for (i = 0; i < data.length; i++) {
if (i != 0) reply += ",";
batch.paramCount++;
childName = "c" + dwr.engine._batch.map.callCount + "-e" + batch.paramCount;
dwr.engine.serialize.convert(batch, referto, data[i], childName, depth + 1);
reply += "reference:";
reply += childName;
}
reply += "]";
}
return reply;
},
/**
* Marshall an object by value
* @private
* @see dwr.engine.serialize.convert() for parameter details
*/
convertObject:function(batch, referto, data, name, depth) {
// treat objects as an associative arrays
var reply = "Object_" + dwr.engine.serialize.getObjectClassName(data) + ":{";
var elementset = (data.constructor && data.constructor.$dwrClassMembers ? data.constructor.$dwrClassMembers : data);
var element;
for (element in elementset) {
if (typeof data[element] != "function") {
batch.paramCount++;
var childName = "c" + dwr.engine._batch.map.callCount + "-e" + batch.paramCount;
dwr.engine.serialize.convert(batch, referto, data[element], childName, depth + 1);
reply += encodeURIComponent(element) + ":reference:" + childName + ", ";
}
}
if (reply.substring(reply.length - 2) == ", ") {
reply = reply.substring(0, reply.length - 2);
}
reply += "}";
return reply;
},
/**
* Marshall an object
* @private
* @see dwr.engine.serialize.convert() for parameter details
*/
convertXml:function(batch, referto, data, name, depth) {
var output;
if (window.XMLSerializer) output = new XMLSerializer().serializeToString(data);
else if (data.toXml) output = data.toXml;
else output = data.innerHTML;
return "xml:" + encodeURIComponent(output);
},
/**
* Have we already converted this object?
* @private
* @see dwr.engine.serialize.convert() for parameter details
*/
lookup:function(referto, data, name) {
var lookup;
// Can't use a map: getahead.org/ajax/javascript-gotchas
for (var i = 0; i < referto.length; i++) {
if (referto[i].data == data) {
lookup = referto[i];
break;
}
}
if (lookup) {
return "reference:" + lookup.name;
}
referto.push({ data:data, name:name });
return null;
},
/**
* Returns the classname of supplied argument obj. Similar to typeof, but
* which returns the name of the constructor that created the object rather
* than 'object'
* @private
* @param {Object} obj The object to detect the type of
* @return The name of the object
*/
getObjectClassName:function(obj) {
// Different handling depending on if, and what type of, class-mapping is used
if (obj.$dwrClassName)
return obj.$dwrClassName; // Light class-mapping uses the classname from a property on the instance
else if (obj.constructor && obj.constructor.$dwrClassName)
return obj.constructor.$dwrClassName; // Full class-mapping uses the classname from a property on the constructor function
else
return "Object";
}
};
/**
* Functions to handle the various remoting transport
*/
dwr.engine.transport = {
/**
* Actually send the block of data in the batch object.
* @private
* @param {Object} batch
*/
send:function(batch) {
dwr.engine.batch.prepareToSend(batch);
// Work out if we are going cross domain
var isCrossDomain = false;
if (batch.path == null) {
batch.path = dwr.engine._pathToDwrServlet;
}
if (batch.path.indexOf("http://") == 0 || batch.path.indexOf("https://") == 0) {
var dwrShortPath = dwr.engine._pathToDwrServlet.split("/", 3).join("/");
var hrefShortPath = window.location.href.split("/", 3).join("/");
isCrossDomain = (dwrShortPath != hrefShortPath);
}
if (batch.fileUpload) {
if (isCrossDomain) {
throw new Error("Cross domain file uploads are not possible with this release of DWR");
}
batch.transport = dwr.engine.transport.iframe;
}
else if (isCrossDomain && !dwr.engine.isJaxerServer) {
batch.transport = dwr.engine.transport.scriptTag;
}
// else if (batch.isPoll && dwr.engine.isIE) {
// batch.transport = dwr.engine.transport.htmlfile;
// }
else {
batch.transport = dwr.engine.transport.xhr;
}
return batch.transport.send(batch);
},
/**
* A generic function to remove all remoting artifacts
* @param {Object} batch The batch that has completed
*/
remove:function(batch) {
dwr.engine.transport.iframe.remove(batch);
dwr.engine.transport.xhr.remove(batch);
},
/**
* Called as a result of a request timeout
* @private
* @param {Object} batch The batch that is aborting
*/
abort:function(batch) {
if (batch && !batch.completed) {
dwr.engine.batch.remove(batch);
if (batch.req) {
batch.req.abort();
}
dwr.engine.transport.remove(batch);
dwr.engine._handleError(batch, { name:"dwr.engine.timeout", message:"Timeout" });
}
},
/**
* Remoting through XHR
*/
xhr:{
/**
* The default HTTP method to use
*/
httpMethod:"POST",
/**
* The ActiveX objects to use when we want to do an XMLHttpRequest call.
* TODO: We arrived at this by trial and error. Other toolkits use
* different strings, maybe there is an officially correct version?
*/
XMLHTTP:["Msxml2.XMLHTTP.6.0", "Msxml2.XMLHTTP.5.0", "Msxml2.XMLHTTP.4.0", "MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP", "Microsoft.XMLHTTP"],
/**
* Setup a batch for transfer through XHR
* @param {Object} batch The batch to alter for XHR transmit
*/
send:function(batch) {
if (batch.isPoll) {
batch.map.partialResponse = dwr.engine._partialResponseYes;
}
// Do proxies or IE force us to use early closing mode?
if (batch.isPoll && dwr.engine._pollWithXhr == "true") {
batch.map.partialResponse = dwr.engine._partialResponseNo;
}
if (batch.isPoll && dwr.engine.isIE < 8) {
batch.map.partialResponse = dwr.engine._partialResponseNo;
} else if (batch.isPoll && dwr.engine.isIE >= 8) {
batch.map.partialResponse = dwr.engine._partialResponseFlush;
}
if (window.XMLHttpRequest) {
batch.req = new XMLHttpRequest();
}
else if (window.ActiveXObject) {
batch.req = dwr.engine.util.newActiveXObject(dwr.engine.transport.xhr.XMLHTTP);
}
// Proceed using XMLHttpRequest
if (batch.async == true) {
batch.req.onreadystatechange = function() {
if (typeof dwr != 'undefined') {
dwr.engine.transport.xhr.stateChange(batch);
}
};
}
// If we're polling, record this for monitoring
if (batch.isPoll) {
dwr.engine._pollReq = batch.req;
// In IE XHR is an ActiveX control so you can't augment it like this
if (!dwr.engine.isIE) batch.req.batch = batch;
}
httpMethod = dwr.engine.transport.xhr.httpMethod;
// Workaround for Safari 1.x POST bug
var indexSafari = navigator.userAgent.indexOf("Safari/");
if (indexSafari >= 0) {
var version = navigator.userAgent.substring(indexSafari + 7);
if (parseInt(version, 10) < 400) {
if (dwr.engine._allowGetForSafariButMakeForgeryEasier == "true") {
httpMethod = "GET";
}
else {
dwr.engine._handleWarning(batch, {
name: "dwr.engine.oldSafari",
message: "Safari GET support disabled. See getahead.org/dwr/server/servlet and allowGetForSafariButMakeForgeryEasier."
});
}
}
}
batch.mode = batch.isPoll ? dwr.engine._ModePlainPoll : dwr.engine._ModePlainCall;
var request = dwr.engine.batch.constructRequest(batch, httpMethod);
try {
batch.req.open(httpMethod, request.url, batch.async);
try {
for (var prop in batch.headers) {
var value = batch.headers[prop];
if (typeof value == "string") {
batch.req.setRequestHeader(prop, value);
}
}
if (!batch.headers["Content-Type"]) {
batch.req.setRequestHeader("Content-Type", "text/plain");
}
}
catch (ex) {
dwr.engine._handleWarning(batch, ex);
}
batch.req.send(request.body);
if (batch.async == false) {
dwr.engine.transport.xhr.stateChange(batch);
}
}
catch (ex) {
dwr.engine._handleError(batch, ex);
}
if (batch.isPoll && batch.map.partialResponse == dwr.engine._partialResponseYes) {
dwr.engine.transport.xhr.checkCometPoll();
}
// This is only of any use in sync mode to return the reply data
return batch.reply;
},
/**
* Called by XMLHttpRequest to indicate that something has happened
* @private
* @param {Object} batch The current remote operation
*/
stateChange:function(batch) {
var toEval;
if (batch.completed) {
dwr.engine._debug("Error: _stateChange() with batch.completed");
return;
}
var req = batch.req;
try {
var readyState = req.readyState;
var notReady = (req.readyState != 4);
if (notReady) {
return;
}
}
catch (ex) {
dwr.engine._handleWarning(batch, ex);
// It's broken - clear up and forget this call
dwr.engine.batch.remove(batch);
return;
}
if (dwr.engine._unloading && !dwr.engine.isJaxerServer) {
dwr.engine._debug("Ignoring reply from server as page is unloading.");
return;
}
try {
var reply = req.responseText;
reply = dwr.engine._replyRewriteHandler(reply);
var status = req.status; // causes Mozilla to except on page moves
if (reply == null || reply == "") {
}
else if (status != 200) {
dwr.engine._handleError(batch, { name:"dwr.engine.http." + status, message:req.statusText });
}
else {
var contentType = req.getResponseHeader("Content-Type");
if (dwr.engine.isJaxerServer) {
// HACK! Jaxer does something b0rken with Content-Type
contentType = "text/javascript";
}
if (!contentType.match(/^text\/plain/) && !contentType.match(/^text\/javascript/)) {
if (contentType.match(/^text\/html/) && typeof batch.textHtmlHandler == "function") {
batch.textHtmlHandler({ status:status, responseText:reply, contentType:contentType });
}
else {
dwr.engine._handleWarning(batch, { name:"dwr.engine.invalidMimeType", message:"Invalid content type: '" + contentType + "'" });
}
}
else {
// Comet replies might have already partially executed
if (batch.isPoll && batch.map.partialResponse == dwr.engine._partialResponseYes) {
dwr.engine.transport.xhr.processCometResponse(reply, batch);
}
else {
if (reply.search("//#DWR") == -1) {
dwr.engine._handleWarning(batch, { name:"dwr.engine.invalidReply", message:"Invalid reply from server" });
}
else {
toEval = reply;
}
}
}
}
}
catch (ex) {
dwr.engine._handleWarning(batch, ex);
}
dwr.engine._callPostHooks(batch);
// Outside of the try/catch so errors propagate normally:
dwr.engine._receivedBatch = batch;
if (toEval != null) toEval = toEval.replace(dwr.engine._scriptTagProtection, "");
dwr.engine._eval(toEval);
dwr.engine._receivedBatch = null;
dwr.engine.batch.validate(batch);
if (!batch.completed) dwr.engine.batch.remove(batch);
},
/**
* Check for reverse Ajax activity
* @private
*/
checkCometPoll:function() {
if (dwr.engine._pollReq) {
var req = dwr.engine._pollReq;
var text = req.responseText;
if (text != null) {
dwr.engine.transport.xhr.processCometResponse(text, req.batch);
}
setTimeout(dwr.engine.transport.xhr.checkCometPoll, dwr.engine._pollCometInterval);
} else {
// if _pollReq is null, something bad has happened. Calling _poll will initiate the retry policy.
dwr.engine._poll();
}
},
/**
* Some more text might have come in, test and execute the new stuff.
* This method could also be called by the iframe transport
* @private
* @param {Object} response from xhr.responseText
* @param {Object} batch The batch that the XHR object pertains to
*/
processCometResponse:function(response, batch) {
if (batch.charsProcessed == response.length) return;
if (response.length == 0) {
batch.charsProcessed = 0;
return;
}
var firstStartTag = response.indexOf("//#DWR-START#", batch.charsProcessed);
if (firstStartTag == -1) {
// dwr.engine._debug("No start tag (search from " + batch.charsProcessed + "). skipping '" + response.substring(batch.charsProcessed) + "'");
batch.charsProcessed = response.length;
return;
}
// if (firstStartTag > 0) {
// dwr.engine._debug("Start tag not at start (search from " + batch.charsProcessed + "). skipping '" + response.substring(batch.charsProcessed, firstStartTag) + "'");
// }
var lastEndTag = response.lastIndexOf("//#DWR-END#");
if (lastEndTag == -1) {
// dwr.engine._debug("No end tag. unchanged charsProcessed=" + batch.charsProcessed);
return;
}
// Skip the end tag too for next time, remembering CR and LF
if (response.charCodeAt(lastEndTag + 11) == 13 && response.charCodeAt(lastEndTag + 12) == 10) {
batch.charsProcessed = lastEndTag + 13;
}
else {
batch.charsProcessed = lastEndTag + 11;
}
var exec = response.substring(firstStartTag + 13, lastEndTag);
try {
dwr.engine._receivedBatch = batch;
dwr.engine._eval(exec);
dwr.engine._receivedBatch = null;
}
catch (ex) {
// This is one of these annoying points where we might be executing
// while the window is being destroyed. If dwr == null, bail out.
if (dwr != null) {
dwr.engine._handleError(batch, ex);
}
}
},
/**
* Tidy-up when an XHR call is done
* @param {Object} batch
*/
remove:function(batch) {
// XHR tidyup: avoid IE handles increase
if (batch.req) {
// If this is a poll frame then stop comet polling
if (batch.req == dwr.engine._pollReq) dwr.engine._pollReq = null;
delete batch.req;
}
}
},
/**
* Functions for remoting through IFrame
*/
iframe:{
/**
* The default HTTP method to use
*/
httpMethod:"POST",
/**
* Setup a batch for transfer through IFrame
* @param {Object} batch The batch to alter for IFrame transmit
*/
send:function(batch) {
batch.httpMethod = dwr.engine.transport.iframe.httpMethod;
if (batch.fileUpload) {
batch.httpMethod = "POST";
batch.encType = "multipart/form-data";
}
var idname = dwr.engine.transport.iframe.getId(batch);
if (dwr.engine.isIE) {
batch.div = document.createElement("div");
document.body.appendChild(batch.div);
batch.div.innerHTML = "";
batch.iframe = batch.div.firstChild;
} else {
batch.iframe = document.createElement("iframe");
batch.iframe.setAttribute("id", idname);
batch.iframe.setAttribute("name", idname);
batch.iframe.setAttribute("frameborder", "0");
batch.iframe.setAttribute("src", "about:blank");
batch.iframe.setAttribute("style", "width:0px;height:0px;border:0;display:none;");
document.body.appendChild(batch.iframe);
}
batch.document = document;
batch.iframe.batch = batch;
dwr.engine.transport.iframe.beginLoader(batch, idname);
},
/**
* Create a unique ID so multiple iframes can fire at the same time
* @param {Object} batch A source of a unique number for the batch
* @return {String} a name prefix for created elements
*/
getId:function(batch) {
return batch.isPoll ? "dwr-if-poll-" + batch.map.batchId : "dwr-if-" + batch.map.batchId;
},
/**
* Setup a form or construct a src attribute to use the iframe.
* This is abstracted from send() because the same logic will do for htmlfile
* @param {Object} batch
*/
beginLoader:function(batch, idname) {
batch.mode = batch.isPoll ? dwr.engine._ModeHtmlPoll : dwr.engine._ModeHtmlCall;
if (batch.isPoll) dwr.engine._outstandingIFrames.push(batch.iframe);
var request = dwr.engine.batch.constructRequest(batch, batch.httpMethod);
if (batch.httpMethod == "GET") {
batch.iframe.setAttribute("src", request.url);
}
else {
// TODO: On firefox we can now get the values of file fields, maybe we should use this
// See http://soakedandsoaped.com/articles/read/firefox-3-native-ajax-file-upload
// setting enctype via the DOM does not work in IE, create the form using innerHTML instead
batch.form = batch.document.createElement("form");
batch.form.setAttribute("id", "dwr-form-" + idname);
batch.form.setAttribute("action", request.url);
batch.form.setAttribute("target", idname);
batch.form.setAttribute("style", "display:none");
batch.form.setAttribute("method", batch.httpMethod);
if (batch.encType) {
batch.form.setAttribute("encType", batch.encType);
batch.form.setAttribute("encoding", batch.encType);
}
for (var prop in batch.map) {
var value = batch.map[prop];
if (typeof value != "function") {
if (value && value.tagName && value.tagName.toLowerCase() == "input" && value.type && value.type.toLowerCase() == "file") {
// Since we can not set the value of a file object, we must post the actual file object
// that the user clicked browse on. We will put a clone in it's place.
var clone = value.cloneNode(true);
value.removeAttribute("id", prop);
value.setAttribute("name", prop);
value.style.display = "none";
value.parentNode.insertBefore(clone, value);
value.parentNode.removeChild(value);
batch.form.appendChild(value);
} else {
var formInput = batch.document.createElement("input");
formInput.setAttribute("type", "hidden");
formInput.setAttribute("name", prop);
formInput.setAttribute("value", value);
batch.form.appendChild(formInput);
}
}
}
batch.document.body.appendChild(batch.form);
batch.form.submit();
}
},
/**
* Called from iframe onload, check batch using batch-id
* @private
* @param {int} batchId The id of the batch that has loaded
*/
loadingComplete:function(batchId) {
var batch = dwr.engine._batches[batchId];
if (batch) dwr.engine.batch.validate(batch);
},
/**
* Functions designed to be called by the server
*/
remote:{
/**
* Called by the server: An IFrame reply is about to start
* @private
* @param {Object} iframe
* @param {int} batchId
*/
beginIFrameResponse:function(iframe, batchId) {
if (iframe != null) dwr.engine._receivedBatch = iframe.batch;
dwr.engine._callPostHooks(dwr.engine._receivedBatch);
},
/**
* Called by the server: An IFrame reply is just completing
* @private
* @param {int} batchId
*/
endIFrameResponse:function(batchId) {
dwr.engine.transport.iframe.loadingComplete(batchId);
dwr.engine.batch.remove(dwr.engine._receivedBatch);
dwr.engine._receivedBatch = null;
}
},
remove:function(batch) {
if (batch.iframe && batch.iframe.parentNode) {
// Safari 3 and Chrome 1 will show endless loading spinner if removing
// iframe during execution of iframe script, so we delay it a bit
setTimeout(function(){
batch.iframe.parentNode.removeChild(batch.iframe);
batch.iframe = null;
}, 100);
}
if (batch.div && batch.div.parentNode)
batch.div.parentNode.removeChild(batch.div);
if (batch.form && batch.form.parentNode)
batch.form.parentNode.removeChild(batch.form);
}
/*
// If we have an iframe comet solution where we need to read data streamed
// into an iframe then we need code like this to slurp the data out.
// Compare this with xhr.checkCometPoll()
outstandingIFrames:[],
checkCometPoll:function() {
for (var i = 0; i < dwr.engine.transport.iframe.outstandingIFrames.length; i++) {
var text = "";
var iframe = dwr.engine.transport.iframe.outstandingIFrames[i];
try {
text = dwr.engine.transport.iframe.getTextFromCometIFrame(iframe);
}
catch (ex) {
dwr.engine._handleWarning(iframe.batch, ex);
}
if (text != "") dwr.engine.transport.xhr.processCometResponse(text, iframe.batch);
}
if (dwr.engine.transport.iframe.outstandingIFrames.length > 0) {
setTimeout(dwr.engine.transport.iframe.checkCometPoll, dwr.engine._pollCometInterval);
}
}
// We probably also need to update dwr.engine.remote.beginIFrameResponse()
// to call checkCometPoll.
// Extract the whole (executed and all) text from the current iframe
getTextFromCometIFrame:function(frameEle) {
var body = frameEle.contentWindow.document.body;
if (body == null) return "";
var text = body.innerHTML;
// We need to prevent IE from stripping line feeds
if (text.indexOf("") == 0 || text.indexOf("") == 0) {
text = text.substring(5, text.length - 7);
}
return text;
};
// And an addition to iframe.remove():
{
if (batch.iframe) {
// If this is a poll frame then stop comet polling
for (var i = 0; i < dwr.engine.transport.iframe.outstandingIFrames.length; i++) {
if (dwr.engine.transport.iframe.outstandingIFrames[i] == batch.iframe) {
dwr.engine.transport.iframe.outstandingIFrames.splice(i, 1);
}
}
}
}
*/
},
/**
* Functions for remoting through Script Tags
*/
scriptTag:{
/**
* Setup a batch for transfer through a script tag
* @param {Object} batch The batch to alter for script tag transmit
*/
send:function(batch) {
batch.mode = batch.isPoll ? dwr.engine._ModePlainPoll : dwr.engine._ModePlainCall;
var request = dwr.engine.batch.constructRequest(batch, "GET");
// The best option is DOM manipulation, but this only works after onload
// has completed
if (document.body) {
batch.script = document.createElement("script");
batch.script.id = "dwr-st-" + batch.map.batchId;
batch.script.src = request.url;
batch.script.type = "text/javascript";
document.body.appendChild(batch.script);
}
else {
document.writeln(" ");
}
}
},
/**
* Remoting through IE's htmlfile ActiveX control
*/
htmlfile:{
/**
* Setup a batch for transfer through htmlfile
* @param {Object} batch The batch to alter for htmlfile transmit
*/
send:function(batch) {
var idname = dwr.engine.transport.iframe.getId(batch);
batch.htmlfile = new window.ActiveXObject("htmlfile");
batch.htmlfile.open();
batch.htmlfile.write("<" + "html>");
batch.htmlfile.write("");
batch.htmlfile.write("");
batch.htmlfile.close();
batch.htmlfile.parentWindow.dwr = dwr;
batch.document = batch.htmlfile;
dwr.engine.transport.iframe.beginLoader(batch, idname);
}
}
};
/**
* Functions to manipulate batches
* @private
*/
dwr.engine.batch = {
/**
* Generate a new standard batch
* @private
*/
create:function() {
var batch = {
async:dwr.engine._async,
charsProcessed:0,
handlers:[],
isPoll:false,
map:{ callCount:0, windowName:window.name },
paramCount:0,
preHooks:[],
postHooks:[],
timeout:dwr.engine._timeout,
errorHandler:dwr.engine._errorHandler,
warningHandler:dwr.engine._warningHandler,
textHtmlHandler:dwr.engine._textHtmlHandler
};
if (dwr.engine._preHook) {
batch.preHooks.push(dwr.engine._preHook);
}
if (dwr.engine._postHook) {
batch.postHooks.push(dwr.engine._postHook);
}
dwr.engine.batch.populateHeadersAndParameters(batch);
return batch;
},
/**
* Generate a new batch for polling
* @private
* @see dwr.engine.batch.create()
*/
createPoll:function() {
var batch = {
async:true,
charsProcessed:0,
handlers:[{
callback:function(pause) {
dwr.engine._retries = 0;
setTimeout(dwr.engine._poll, pause);
}
}],
isPoll:true,
map:{ windowName:window.name },
paramCount:0,
path:dwr.engine._pathToDwrServlet,
preHooks:[],
postHooks:[],
timeout:0,
windowName:window.name,
errorHandler:dwr.engine._retryHandler,
warningHandler:dwr.engine._retryHandler,
textHtmlHandler:dwr.engine._textHtmlHandler
};
dwr.engine.batch.populateHeadersAndParameters(batch);
return batch;
},
/**
* Copy the global headers and parameters into this batch object
* @private
* @param {Object} batch The destination
*/
populateHeadersAndParameters:function(batch) {
var propname, data;
batch.headers = {};
if (dwr.engine._headers) {
for (propname in dwr.engine._headers) {
data = dwr.engine._headers[propname];
if (typeof data != "function") batch.headers[propname] = data;
}
}
batch.attributes = {}; // props to add as request attributes
if (dwr.engine._requestAttributes) {
for (propname in dwr.engine._requestAttributes) {
data = dwr.engine._requestAttributes[propname];
if (typeof data != "function") batch.attributes[propname] = data;
}
}
},
/**
* Augment this batch with a new call
* @private
*/
addCall:function(batch, scriptName, methodName, args) {
// From the other params, work out which is the function (or object with
// call meta-data) and which is the call parameters
var callData, stopAt;
var lastArg = args[args.length - 1];
if (lastArg == null || typeof lastArg == "function") {
callData = { callback:lastArg };
stopAt = args.length - 1;
}
else if (typeof lastArg == "object" && (typeof lastArg.callback == "function"
|| typeof lastArg.exceptionHandler == "function" || typeof lastArg.callbackHandler == "function"
|| typeof lastArg.errorHandler == "function" || typeof lastArg.warningHandler == "function" )) {
callData = lastArg;
stopAt = args.length - 1;
}
else {
callData = {};
stopAt = args.length;
}
// Merge from the callData into the batch
dwr.engine.batch.merge(batch, callData);
batch.handlers[batch.map.callCount] = {
exceptionHandler:callData.exceptionHandler,
exceptionArg:callData.exceptionArg || callData.arg || null,
exceptionScope:callData.exceptionScope || callData.scope || window,
callback:callData.callbackHandler || callData.callback,
callbackArg:callData.callbackArg || callData.arg || null,
callbackScope:callData.callbackScope || callData.scope || window
};
// Copy to the map the things that need serializing
var prefix = "c" + batch.map.callCount + "-";
batch.map[prefix + "scriptName"] = scriptName;
batch.map[prefix + "methodName"] = methodName;
batch.map[prefix + "id"] = batch.map.callCount;
var converted = [];
for (var i = 0; i < stopAt; i++) {
dwr.engine.serialize.convert(batch, converted, args[i], prefix + "param" + i, 0);
}
},
/**
* Take further options and merge them into a batch
* @private
* @param {Object} batch The batch that we are altering
* @param {Object} overrides The object containing properties to copy into batch
*/
merge:function(batch, overrides) {
var propname, data;
for (var i = 0; i < dwr.engine._propnames.length; i++) {
propname = dwr.engine._propnames[i];
if (overrides[propname] != null) batch[propname] = overrides[propname];
}
if (overrides.preHook != null) batch.preHooks.unshift(overrides.preHook);
if (overrides.postHook != null) batch.postHooks.push(overrides.postHook);
if (overrides.headers) {
for (propname in overrides.headers) {
data = overrides.headers[propname];
if (typeof data != "function") batch.headers[propname] = data;
}
}
var reqAttrs = null;
if (overrides.parameters) reqAttrs = overrides.parameters;
if (overrides.requestAttributes) reqAttrs = overrides.requestAttributes;
if (reqAttrs) {
for (propname in reqAttrs) {
data = reqAttrs[propname];
if (typeof data != "function") batch.map["p-" + propname] = "" + data;
}
}
},
/**
* Executed just before a transport sends the batch
* @private
* @param {Object} batch The batch to prepare for sending
*/
prepareToSend:function(batch) {
batch.map.batchId = dwr.engine._nextBatchId;
dwr.engine._nextBatchId++;
dwr.engine._batches[batch.map.batchId] = batch;
dwr.engine._batchesLength++;
batch.completed = false;
// security details are filled in late so previous batches have completed
batch.map.page = encodeURIComponent(window.location.pathname + window.location.search);
batch.map.httpSessionId = dwr.engine._getHttpSessionId();
batch.map.scriptSessionId = dwr.engine._scriptSessionId;
batch.map.windowName = window.name;
for (var i = 0; i < batch.preHooks.length; i++) {
batch.preHooks[i]();
}
batch.preHooks = null;
// Set a timeout
if (batch.timeout && batch.timeout != 0) {
batch.timeoutId = setTimeout(function() { dwr.engine.transport.abort(batch); }, batch.timeout);
}
},
/**
* Work out what the URL should look like
* @private
* @param {Object} batch the data that we are sending
* @param {Object} httpMethod Are we using GET/POST etc?
*/
constructRequest:function(batch, httpMethod) {
// A quick string to help people that use web log analysers
var urlBuffer = [];
urlBuffer.push(batch.path);
urlBuffer.push(batch.mode);
if (batch.isPoll) {
urlBuffer.push("ReverseAjax.dwr");
}
else if (batch.map.callCount == 1) {
urlBuffer.push(batch.map["c0-scriptName"]);
urlBuffer.push(".");
urlBuffer.push(batch.map["c0-methodName"]);
urlBuffer.push(".dwr");
}
else {
urlBuffer.push("Multiple.");
urlBuffer.push(batch.map.callCount);
urlBuffer.push(".dwr");
}
// Play nice with url re-writing
var sessionMatch = location.href.match(/jsessionid=([^?#]+)/);
if (sessionMatch != null) {
urlBuffer.push(";jsessionid=");
urlBuffer.push(sessionMatch[1]);
}
var request = {};
var prop;
if (httpMethod == "GET") {
// Some browsers (Opera/Safari2) seem to fail to convert the callCount value
// to a string in the loop below so we do it manually here.
batch.map.callCount = "" + batch.map.callCount;
urlBuffer.push("?");
for (prop in batch.map) {
if (typeof batch.map[prop] != "function") {
urlBuffer.push(encodeURIComponent(prop));
urlBuffer.push("=");
urlBuffer.push(encodeURIComponent(batch.map[prop]));
urlBuffer.push("&");
}
}
urlBuffer.pop(); // remove the trailing &
request.body = null;
}
else {
// PERFORMANCE: for iframe mode this is thrown away.
if (dwr.engine.isIE <= 7) {
// Use array joining on IE1-7 (fastest)
var buf = [];
for (prop in batch.map) {
if (typeof batch.map[prop] != "function") {
buf.push(prop + "=" + batch.map[prop] + dwr.engine._postSeperator);
}
}
request.body = buf.join("");
}
else {
// Use string concat on other browsers (fastest)
for (prop in batch.map) {
if (typeof batch.map[prop] != "function") {
request.body += prop + "=" + batch.map[prop] + dwr.engine._postSeperator;
}
}
}
var bodyBuffer = [];
for (prop in batch.map) {
if (typeof batch.map[prop] != "function") {
bodyBuffer.push(prop);
bodyBuffer.push("=");
bodyBuffer.push(batch.map[prop]);
bodyBuffer.push(dwr.engine._postSeperator);
}
}
request.body = dwr.engine._contentRewriteHandler(bodyBuffer.join(""));
}
request.url = dwr.engine._urlRewriteHandler(urlBuffer.join(""));
return request;
},
/**
* @private This function is invoked when a batch reply is received.
* It checks that there is a response for every call in the batch. Otherwise,
* an error will be signaled (a call without a response indicates that the
* server failed to send complete batch response).
*/
validate:function(batch) {
// If some call left unreplied, report an error.
if (!batch.completed) {
for (var i = 0; i < batch.map.callCount; i++) {
if (batch.handlers[i].completed !== true) {
dwr.engine._handleWarning(batch, { name:"dwr.engine.incompleteReply", message:"Incomplete reply from server" });
break;
}
}
}
},
/**
* A call has finished by whatever means and we need to shut it all down.
* @private
* @param {Object} batch The batch that we are altering
*/
remove:function(batch) {
if (!batch) {
dwr.engine._debug("Warning: null batch in dwr.engine.batch.remove()", true);
return;
}
if (batch.completed == "true") {
dwr.engine._debug("Warning: Double complete", true);
return;
}
batch.completed = true;
// Transport tidyup
dwr.engine.transport.remove(batch);
// Timeout tidyup
if (batch.timeoutId) {
clearTimeout(batch.timeoutId);
delete batch.timeoutId;
}
// TODO: co-locate all the functions that work on a set of batches
if (batch.map && (batch.map.batchId || batch.map.batchId == 0)) {
delete dwr.engine._batches[batch.map.batchId];
dwr.engine._batchesLength--;
}
// If there is anything on the queue waiting to go out, then send it.
// We don't need to check for ordered mode, here because when ordered mode
// gets turned off, we still process *waiting* batches in an ordered way.
if (dwr.engine._batchQueue.length != 0) {
var sendbatch = dwr.engine._batchQueue.shift();
dwr.engine.transport.send(sendbatch);
}
}
};
/**
* Various utility functions
* @private
*/
dwr.engine.util = {
/**
* Create one of a number of ActiveX strings
* @param {Object} axarray An array of strings to attempt to create ActiveX objects from
*/
newActiveXObject:function(axarray) {
var returnValue;
for (var i = 0; i < axarray.length; i++) {
try {
returnValue = new ActiveXObject(axarray[i]);
break;
}
catch (ex) { /* ignore */ }
}
return returnValue;
}
};
/**
* Work out what type of browser we are working on
*/
var userAgent = navigator.userAgent;
var versionString = navigator.appVersion;
var version = parseFloat(versionString);
dwr.engine.isOpera = (userAgent.indexOf("Opera") >= 0) ? version : 0;
dwr.engine.isKhtml = (versionString.indexOf("Konqueror") >= 0) || (versionString.indexOf("Safari") >= 0) ? version : 0;
dwr.engine.isSafari = (versionString.indexOf("Safari") >= 0) ? version : 0;
dwr.engine.isJaxerServer = (window.Jaxer && Jaxer.isOnServer);
var geckoPos = userAgent.indexOf("Gecko");
dwr.engine.isMozilla = ((geckoPos >= 0) && (!dwr.engine.isKhtml)) ? version : 0;
dwr.engine.isFF = 0;
dwr.engine.isIE = 0;
try {
if (dwr.engine.isMozilla) {
dwr.engine.isFF = parseFloat(userAgent.split("Firefox/")[1].split(" ")[0]);
}
if ((document.all) && (!dwr.engine.isOpera)) {
dwr.engine.isIE = parseFloat(versionString.split("MSIE ")[1].split(";")[0]);
}
}
catch(ex) { }
// Fetch the scriptSessionId from the server
eval("dwr.engine._execute(dwr.engine._pathToDwrServlet, '__System', 'pageLoaded', [ function() { dwr.engine._ordered = false; }]);");
/**
* Routines for the DWR pubsub hub
*/
dwr.hub = {
/**
* Publish some data to a given topic
* @param {Object} topicName The topic to publish to
* @param {Object} data The data to publish
*/
publish:function(topicName, data) {
dwr.engine._execute(dwr.engine._pathToDwrServlet, '__System', 'publish', topicName, data, {});
},
/**
* Subscribe to get notifications of publish events to a given topic
* @param {String} topicName The topic to subscribe to
* @param {Function} callback The function to call when a publish happens
* @param {Object} scope The 'this' object on which the callback executes (optional)
* @param {Object} subscriberData Data that the subscriber wishes to remember (optional)
* @return An opaque type for use with unsubscribe
*/
subscribe:function(topicName, callback, scope, subscriberData) {
var subscription = "" + dwr.hub._subscriptionId;
dwr.hub._subscriptionId++;
dwr.hub._subscriptions[subscription] = {
callback:callback,
scope:scope,
subscriberData:subscriberData
};
dwr.engine._execute(dwr.engine._pathToDwrServlet, '__System', 'subscribe', topicName, subscription, {});
return subscription;
},
/**
* Called by the server: A publish event has happened that we care about
* @private
* @param {Object} subscriptionId
* @param {Object} publishData
*/
_remotePublish:function(subscriptionId, publishData) {
var subscriptionData = dwr.hub._subscriptions[subscriptionId];
if (!subscriptionData) return;
subscriptionData.callback.call(subscriptionData.scope, publishData, subscriptionData.subscriberData);
},
/**
* Each time we subscribe to something, we use a unique number
*/
_subscriptionId:0,
/**
* We need to remember what we are subscribed to so we can recall the callback
*/
_subscriptions:{}
};
})();
/**
* High level data-sync API for use by Widget libraries like a Dojo-Data-Store.
* For full documentation see org.directwebremoting.export.Data
*/
dwr.data = {
/**
* This is just documentation that defines how the listener parameter must act
* in order to receive asynchronous updates
*/
StoreChangeListener:{
/**
* Something has removed an item from the store
* @param {StoreProvider} source The store from which it was moved
* @param {string} itemId The ID of the item
*/
itemRemoved:function(source, itemId) { },
/**
* Something has added an item to the store
* @param {StoreProvider} source The store from which it was moved
* @param {Item} item The thing that has changed
*/
itemAdded:function(source, item) { },
/**
* Something has updated an item in the store
* @param {StoreProvider} source The store from which it was moved
* @param {Item} item The thing that has changed
* @param {string[]} changedAttributes A list of changed attributes. If null then
* you should assume that everything has changed
*/
itemChanged:function(source, item, changedAttributes) { }
},
/**
* Create a cache object containing the functions to interact with a server
* side StoreProvider
* @param {string} storeId ID of server provided storage
* @param {dwr.data.StoreChangeListener} listener See server documentation
* This is likely to be true if dwr.engine.activeReverseAjax == true
*/
Cache:function(storeId, listener) {
this.storeId = storeId;
this.listener = listener;
}
};
(function() {
/**
* Notes that there is a region of a page that wishes to subscribe to server
* side data and registers a callback function to receive the data.
* @param {Object} region filtering and sorting options. Includes:
* - start: The beginning of the region of specific interest
* - count: The number of items being viewed
* - sort: The sort criteria
* - query: The filter criteria
* @param {function|object} callbackObj A standard DWR callback object
* @return
*/
dwr.data.Cache.prototype.viewRegion = function(region, callbackObj) {
if (!region) region = { };
if (!region.start) region.start = 0;
if (!region.count) region.count = -1;
if (!region.sort) region.sort = [];
else {
for (var index = 0; index < region.sort.length; index++) {
if (typeof region.sort[index].descending == "undefined") {
region.sort[index].descending = false;
}
}
}
if (!region.query) region.query = {};
return dwr.engine._execute(dwr.engine._pathToDwrServlet, '__Data', 'viewRegion', [ this.storeId, region, this.listener, callbackObj ]);
};
/**
* As dwr.data.Cache.viewRegion() except that we only want to see a single item.
* @param {string} itemId ID of object within the given store
* @param {function|object} callbackObj A standard DWR callback object
*/
dwr.data.Cache.prototype.viewItem = function(itemId, callbackObj) {
return dwr.engine._execute(dwr.engine._pathToDwrServlet, '__Data', 'viewItem', [ this.storeId, itemId, this.listener, callbackObj ]);
};
/**
* Undo the action of dwr.data.view()
* @param {function|object} callbackObj A standard DWR callback object
*/
dwr.data.Cache.prototype.unsubscribe = function(callbackObj) {
if (this.listener) {
return dwr.engine._execute(dwr.engine._pathToDwrServlet, '__Data', 'unsubscribe', [ this.storeId, this.listener, callbackObj ]);
}
};
/**
* Request an update to server side data
* @param {Object} items An array of update descriptions
* @param {function|object} callbackObj A standard DWR callback object
*/
dwr.data.Cache.prototype.update = function(items, callbackObj) {
return dwr.engine._execute(dwr.engine._pathToDwrServlet, '__Data', 'update', [ this.storeId, items, callbackObj ]);
};
})();