kopia lustrzana https://github.com/miklobit/TiddlyWiki5
510 wiersze
14 KiB
JavaScript
510 wiersze
14 KiB
JavaScript
/**
|
|
* XMLHttpRequest.js Copyright (C) 2011 Sergey Ilinsky (http://www.ilinsky.com)
|
|
*
|
|
* This work is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation; either version 2.1 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This work is distributed in the hope that it will be useful,
|
|
* but without any warranty; without even the implied warranty of
|
|
* merchantability or fitness for a particular purpose. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library; if not, write to the Free Software Foundation, Inc.,
|
|
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
(function () {
|
|
|
|
// Save reference to earlier defined object implementation (if any)
|
|
var oXMLHttpRequest = window.XMLHttpRequest;
|
|
|
|
// Define on browser type
|
|
var bGecko = !!window.controllers;
|
|
var bIE = window.document.all && !window.opera;
|
|
var bIE7 = bIE && window.navigator.userAgent.match(/MSIE 7.0/);
|
|
|
|
// Enables "XMLHttpRequest()" call next to "new XMLHttpReques()"
|
|
function fXMLHttpRequest() {
|
|
this._object = oXMLHttpRequest && !bIE7 ? new oXMLHttpRequest : new window.ActiveXObject("Microsoft.XMLHTTP");
|
|
this._listeners = [];
|
|
}
|
|
|
|
// Constructor
|
|
function cXMLHttpRequest() {
|
|
return new fXMLHttpRequest;
|
|
}
|
|
cXMLHttpRequest.prototype = fXMLHttpRequest.prototype;
|
|
|
|
// BUGFIX: Firefox with Firebug installed would break pages if not executed
|
|
if (bGecko && oXMLHttpRequest.wrapped) {
|
|
cXMLHttpRequest.wrapped = oXMLHttpRequest.wrapped;
|
|
}
|
|
|
|
// Constants
|
|
cXMLHttpRequest.UNSENT = 0;
|
|
cXMLHttpRequest.OPENED = 1;
|
|
cXMLHttpRequest.HEADERS_RECEIVED = 2;
|
|
cXMLHttpRequest.LOADING = 3;
|
|
cXMLHttpRequest.DONE = 4;
|
|
|
|
// Public Properties
|
|
cXMLHttpRequest.prototype.readyState = cXMLHttpRequest.UNSENT;
|
|
cXMLHttpRequest.prototype.responseText = '';
|
|
cXMLHttpRequest.prototype.responseXML = null;
|
|
cXMLHttpRequest.prototype.status = 0;
|
|
cXMLHttpRequest.prototype.statusText = '';
|
|
|
|
// Priority proposal
|
|
cXMLHttpRequest.prototype.priority = "NORMAL";
|
|
|
|
// Instance-level Events Handlers
|
|
cXMLHttpRequest.prototype.onreadystatechange = null;
|
|
|
|
// Class-level Events Handlers
|
|
cXMLHttpRequest.onreadystatechange = null;
|
|
cXMLHttpRequest.onopen = null;
|
|
cXMLHttpRequest.onsend = null;
|
|
cXMLHttpRequest.onabort = null;
|
|
|
|
// Public Methods
|
|
cXMLHttpRequest.prototype.open = function(sMethod, sUrl, bAsync, sUser, sPassword) {
|
|
// Delete headers, required when object is reused
|
|
delete this._headers;
|
|
|
|
// When bAsync parameter value is omitted, use true as default
|
|
if (arguments.length < 3) {
|
|
bAsync = true;
|
|
}
|
|
|
|
// Save async parameter for fixing Gecko bug with missing readystatechange in synchronous requests
|
|
this._async = bAsync;
|
|
|
|
// Set the onreadystatechange handler
|
|
var oRequest = this;
|
|
var nState = this.readyState;
|
|
var fOnUnload = null;
|
|
|
|
// BUGFIX: IE - memory leak on page unload (inter-page leak)
|
|
if (bIE && bAsync) {
|
|
fOnUnload = function() {
|
|
if (nState != cXMLHttpRequest.DONE) {
|
|
fCleanTransport(oRequest);
|
|
// Safe to abort here since onreadystatechange handler removed
|
|
oRequest.abort();
|
|
}
|
|
};
|
|
window.attachEvent("onunload", fOnUnload);
|
|
}
|
|
|
|
// Add method sniffer
|
|
if (cXMLHttpRequest.onopen) {
|
|
cXMLHttpRequest.onopen.apply(this, arguments);
|
|
}
|
|
|
|
if (arguments.length > 4) {
|
|
this._object.open(sMethod, sUrl, bAsync, sUser, sPassword);
|
|
} else if (arguments.length > 3) {
|
|
this._object.open(sMethod, sUrl, bAsync, sUser);
|
|
} else {
|
|
this._object.open(sMethod, sUrl, bAsync);
|
|
}
|
|
|
|
this.readyState = cXMLHttpRequest.OPENED;
|
|
fReadyStateChange(this);
|
|
|
|
this._object.onreadystatechange = function() {
|
|
if (bGecko && !bAsync) {
|
|
return;
|
|
}
|
|
|
|
// Synchronize state
|
|
oRequest.readyState = oRequest._object.readyState;
|
|
fSynchronizeValues(oRequest);
|
|
|
|
// BUGFIX: Firefox fires unnecessary DONE when aborting
|
|
if (oRequest._aborted) {
|
|
// Reset readyState to UNSENT
|
|
oRequest.readyState = cXMLHttpRequest.UNSENT;
|
|
|
|
// Return now
|
|
return;
|
|
}
|
|
|
|
if (oRequest.readyState == cXMLHttpRequest.DONE) {
|
|
// Free up queue
|
|
delete oRequest._data;
|
|
|
|
// Uncomment these lines for bAsync
|
|
/**
|
|
* if (bAsync) {
|
|
* fQueue_remove(oRequest);
|
|
* }
|
|
*/
|
|
|
|
fCleanTransport(oRequest);
|
|
|
|
// Uncomment this block if you need a fix for IE cache
|
|
/**
|
|
* // BUGFIX: IE - cache issue
|
|
* if (!oRequest._object.getResponseHeader("Date")) {
|
|
* // Save object to cache
|
|
* oRequest._cached = oRequest._object;
|
|
*
|
|
* // Instantiate a new transport object
|
|
* cXMLHttpRequest.call(oRequest);
|
|
*
|
|
* // Re-send request
|
|
* if (sUser) {
|
|
* if (sPassword) {
|
|
* oRequest._object.open(sMethod, sUrl, bAsync, sUser, sPassword);
|
|
* } else {
|
|
* oRequest._object.open(sMethod, sUrl, bAsync);
|
|
* }
|
|
*
|
|
* oRequest._object.setRequestHeader("If-Modified-Since", oRequest._cached.getResponseHeader("Last-Modified") || new window.Date(0));
|
|
* // Copy headers set
|
|
* if (oRequest._headers) {
|
|
* for (var sHeader in oRequest._headers) {
|
|
* // Some frameworks prototype objects with functions
|
|
* if (typeof oRequest._headers[sHeader] == "string") {
|
|
* oRequest._object.setRequestHeader(sHeader, oRequest._headers[sHeader]);
|
|
* }
|
|
* }
|
|
* }
|
|
* oRequest._object.onreadystatechange = function() {
|
|
* // Synchronize state
|
|
* oRequest.readyState = oRequest._object.readyState;
|
|
*
|
|
* if (oRequest._aborted) {
|
|
* //
|
|
* oRequest.readyState = cXMLHttpRequest.UNSENT;
|
|
*
|
|
* // Return
|
|
* return;
|
|
* }
|
|
*
|
|
* if (oRequest.readyState == cXMLHttpRequest.DONE) {
|
|
* // Clean Object
|
|
* fCleanTransport(oRequest);
|
|
*
|
|
* // get cached request
|
|
* if (oRequest.status == 304) {
|
|
* oRequest._object = oRequest._cached;
|
|
* }
|
|
*
|
|
* //
|
|
* delete oRequest._cached;
|
|
*
|
|
* //
|
|
* fSynchronizeValues(oRequest);
|
|
*
|
|
* //
|
|
* fReadyStateChange(oRequest);
|
|
*
|
|
* // BUGFIX: IE - memory leak in interrupted
|
|
* if (bIE && bAsync) {
|
|
* window.detachEvent("onunload", fOnUnload);
|
|
* }
|
|
*
|
|
* }
|
|
* };
|
|
* oRequest._object.send(null);
|
|
*
|
|
* // Return now - wait until re-sent request is finished
|
|
* return;
|
|
* };
|
|
*/
|
|
|
|
// BUGFIX: IE - memory leak in interrupted
|
|
if (bIE && bAsync) {
|
|
window.detachEvent("onunload", fOnUnload);
|
|
}
|
|
|
|
// BUGFIX: Some browsers (Internet Explorer, Gecko) fire OPEN readystate twice
|
|
if (nState != oRequest.readyState) {
|
|
fReadyStateChange(oRequest);
|
|
}
|
|
|
|
nState = oRequest.readyState;
|
|
}
|
|
};
|
|
};
|
|
|
|
cXMLHttpRequest.prototype.send = function(vData) {
|
|
// Add method sniffer
|
|
if (cXMLHttpRequest.onsend) {
|
|
cXMLHttpRequest.onsend.apply(this, arguments);
|
|
}
|
|
|
|
if (!arguments.length) {
|
|
vData = null;
|
|
}
|
|
|
|
// BUGFIX: Safari - fails sending documents created/modified dynamically, so an explicit serialization required
|
|
// BUGFIX: IE - rewrites any custom mime-type to "text/xml" in case an XMLNode is sent
|
|
// BUGFIX: Gecko - fails sending Element (this is up to the implementation either to standard)
|
|
if (vData && vData.nodeType) {
|
|
vData = window.XMLSerializer ? new window.XMLSerializer().serializeToString(vData) : vData.xml;
|
|
if (!this._headers["Content-Type"]) {
|
|
this._object.setRequestHeader("Content-Type", "application/xml");
|
|
}
|
|
}
|
|
|
|
this._data = vData;
|
|
|
|
/**
|
|
* // Add to queue
|
|
* if (this._async) {
|
|
* fQueue_add(this);
|
|
* } else { */
|
|
fXMLHttpRequest_send(this);
|
|
/**
|
|
* }
|
|
*/
|
|
};
|
|
|
|
cXMLHttpRequest.prototype.abort = function() {
|
|
// Add method sniffer
|
|
if (cXMLHttpRequest.onabort) {
|
|
cXMLHttpRequest.onabort.apply(this, arguments);
|
|
}
|
|
|
|
// BUGFIX: Gecko - unnecessary DONE when aborting
|
|
if (this.readyState > cXMLHttpRequest.UNSENT) {
|
|
this._aborted = true;
|
|
}
|
|
|
|
this._object.abort();
|
|
|
|
// BUGFIX: IE - memory leak
|
|
fCleanTransport(this);
|
|
|
|
this.readyState = cXMLHttpRequest.UNSENT;
|
|
|
|
delete this._data;
|
|
|
|
/* if (this._async) {
|
|
* fQueue_remove(this);
|
|
* }
|
|
*/
|
|
};
|
|
|
|
cXMLHttpRequest.prototype.getAllResponseHeaders = function() {
|
|
return this._object.getAllResponseHeaders();
|
|
};
|
|
|
|
cXMLHttpRequest.prototype.getResponseHeader = function(sName) {
|
|
return this._object.getResponseHeader(sName);
|
|
};
|
|
|
|
cXMLHttpRequest.prototype.setRequestHeader = function(sName, sValue) {
|
|
// BUGFIX: IE - cache issue
|
|
if (!this._headers) {
|
|
this._headers = {};
|
|
}
|
|
|
|
this._headers[sName] = sValue;
|
|
|
|
return this._object.setRequestHeader(sName, sValue);
|
|
};
|
|
|
|
// EventTarget interface implementation
|
|
cXMLHttpRequest.prototype.addEventListener = function(sName, fHandler, bUseCapture) {
|
|
for (var nIndex = 0, oListener; oListener = this._listeners[nIndex]; nIndex++) {
|
|
if (oListener[0] == sName && oListener[1] == fHandler && oListener[2] == bUseCapture) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Add listener
|
|
this._listeners.push([sName, fHandler, bUseCapture]);
|
|
};
|
|
|
|
cXMLHttpRequest.prototype.removeEventListener = function(sName, fHandler, bUseCapture) {
|
|
for (var nIndex = 0, oListener; oListener = this._listeners[nIndex]; nIndex++) {
|
|
if (oListener[0] == sName && oListener[1] == fHandler && oListener[2] == bUseCapture) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Remove listener
|
|
if (oListener) {
|
|
this._listeners.splice(nIndex, 1);
|
|
}
|
|
};
|
|
|
|
cXMLHttpRequest.prototype.dispatchEvent = function(oEvent) {
|
|
var oEventPseudo = {
|
|
'type': oEvent.type,
|
|
'target': this,
|
|
'currentTarget': this,
|
|
'eventPhase': 2,
|
|
'bubbles': oEvent.bubbles,
|
|
'cancelable': oEvent.cancelable,
|
|
'timeStamp': oEvent.timeStamp,
|
|
'stopPropagation': function() {}, // There is no flow
|
|
'preventDefault': function() {}, // There is no default action
|
|
'initEvent': function() {} // Original event object should be initialized
|
|
};
|
|
|
|
// Execute onreadystatechange
|
|
if (oEventPseudo.type == "readystatechange" && this.onreadystatechange) {
|
|
(this.onreadystatechange.handleEvent || this.onreadystatechange).apply(this, [oEventPseudo]);
|
|
}
|
|
|
|
|
|
// Execute listeners
|
|
for (var nIndex = 0, oListener; oListener = this._listeners[nIndex]; nIndex++) {
|
|
if (oListener[0] == oEventPseudo.type && !oListener[2]) {
|
|
(oListener[1].handleEvent || oListener[1]).apply(this, [oEventPseudo]);
|
|
}
|
|
}
|
|
|
|
};
|
|
|
|
//
|
|
cXMLHttpRequest.prototype.toString = function() {
|
|
return '[' + "object" + ' ' + "XMLHttpRequest" + ']';
|
|
};
|
|
|
|
cXMLHttpRequest.toString = function() {
|
|
return '[' + "XMLHttpRequest" + ']';
|
|
};
|
|
|
|
/**
|
|
* // Queue manager
|
|
* var oQueuePending = {"CRITICAL":[],"HIGH":[],"NORMAL":[],"LOW":[],"LOWEST":[]},
|
|
* aQueueRunning = [];
|
|
* function fQueue_add(oRequest) {
|
|
* oQueuePending[oRequest.priority in oQueuePending ? oRequest.priority : "NORMAL"].push(oRequest);
|
|
* //
|
|
* setTimeout(fQueue_process);
|
|
* };
|
|
*
|
|
* function fQueue_remove(oRequest) {
|
|
* for (var nIndex = 0, bFound = false; nIndex < aQueueRunning.length; nIndex++)
|
|
* if (bFound) {
|
|
* aQueueRunning[nIndex - 1] = aQueueRunning[nIndex];
|
|
* } else {
|
|
* if (aQueueRunning[nIndex] == oRequest) {
|
|
* bFound = true;
|
|
* }
|
|
* }
|
|
*
|
|
* if (bFound) {
|
|
* aQueueRunning.length--;
|
|
* }
|
|
*
|
|
*
|
|
* //
|
|
* setTimeout(fQueue_process);
|
|
* };
|
|
*
|
|
* function fQueue_process() {
|
|
* if (aQueueRunning.length < 6) {
|
|
* for (var sPriority in oQueuePending) {
|
|
* if (oQueuePending[sPriority].length) {
|
|
* var oRequest = oQueuePending[sPriority][0];
|
|
* oQueuePending[sPriority] = oQueuePending[sPriority].slice(1);
|
|
* //
|
|
* aQueueRunning.push(oRequest);
|
|
* // Send request
|
|
* fXMLHttpRequest_send(oRequest);
|
|
* break;
|
|
* }
|
|
* }
|
|
* }
|
|
* };
|
|
*/
|
|
|
|
// Helper function
|
|
function fXMLHttpRequest_send(oRequest) {
|
|
oRequest._object.send(oRequest._data);
|
|
|
|
// BUGFIX: Gecko - missing readystatechange calls in synchronous requests
|
|
if (bGecko && !oRequest._async) {
|
|
oRequest.readyState = cXMLHttpRequest.OPENED;
|
|
|
|
// Synchronize state
|
|
fSynchronizeValues(oRequest);
|
|
|
|
// Simulate missing states
|
|
while (oRequest.readyState < cXMLHttpRequest.DONE) {
|
|
oRequest.readyState++;
|
|
fReadyStateChange(oRequest);
|
|
// Check if we are aborted
|
|
if (oRequest._aborted) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
function fReadyStateChange(oRequest) {
|
|
// Sniffing code
|
|
if (cXMLHttpRequest.onreadystatechange){
|
|
cXMLHttpRequest.onreadystatechange.apply(oRequest);
|
|
}
|
|
|
|
|
|
// Fake event
|
|
oRequest.dispatchEvent({
|
|
'type': "readystatechange",
|
|
'bubbles': false,
|
|
'cancelable': false,
|
|
'timeStamp': new Date + 0
|
|
});
|
|
}
|
|
|
|
function fGetDocument(oRequest) {
|
|
var oDocument = oRequest.responseXML;
|
|
var sResponse = oRequest.responseText;
|
|
// Try parsing responseText
|
|
if (bIE && sResponse && oDocument && !oDocument.documentElement && oRequest.getResponseHeader("Content-Type").match(/[^\/]+\/[^\+]+\+xml/)) {
|
|
oDocument = new window.ActiveXObject("Microsoft.XMLDOM");
|
|
oDocument.async = false;
|
|
oDocument.validateOnParse = false;
|
|
oDocument.loadXML(sResponse);
|
|
}
|
|
|
|
// Check if there is no error in document
|
|
if (oDocument){
|
|
if ((bIE && oDocument.parseError !== 0) || !oDocument.documentElement || (oDocument.documentElement && oDocument.documentElement.tagName == "parsererror")) {
|
|
return null;
|
|
}
|
|
}
|
|
return oDocument;
|
|
}
|
|
|
|
function fSynchronizeValues(oRequest) {
|
|
try { oRequest.responseText = oRequest._object.responseText; } catch (e) {}
|
|
try { oRequest.responseXML = fGetDocument(oRequest._object); } catch (e) {}
|
|
try { oRequest.status = oRequest._object.status; } catch (e) {}
|
|
try { oRequest.statusText = oRequest._object.statusText; } catch (e) {}
|
|
}
|
|
|
|
function fCleanTransport(oRequest) {
|
|
// BUGFIX: IE - memory leak (on-page leak)
|
|
oRequest._object.onreadystatechange = new window.Function;
|
|
}
|
|
|
|
// Internet Explorer 5.0 (missing apply)
|
|
if (!window.Function.prototype.apply) {
|
|
window.Function.prototype.apply = function(oRequest, oArguments) {
|
|
if (!oArguments) {
|
|
oArguments = [];
|
|
}
|
|
oRequest.__func = this;
|
|
oRequest.__func(oArguments[0], oArguments[1], oArguments[2], oArguments[3], oArguments[4]);
|
|
delete oRequest.__func;
|
|
};
|
|
}
|
|
|
|
// Register new object with window
|
|
window.XMLHttpRequest = cXMLHttpRequest;
|
|
|
|
})();
|