Upgrade to ExtJS 4.0.0 - Released 04/26/2011
[extjs.git] / docs / source / ext-base-ajax.html
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-<html>
-<head>
-  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />    
-  <title>The source code</title>
-    <link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />
-    <script type="text/javascript" src="../resources/prettify/prettify.js"></script>
-</head>
-<body  onload="prettyPrint();">
-    <pre class="prettyprint lang-js">/*!
- * Ext JS Library 3.3.0
- * Copyright(c) 2006-2010 Ext JS, Inc.
- * licensing@extjs.com
- * http://www.extjs.com/license
- */
-/*
-* Portions of this file are based on pieces of Yahoo User Interface Library
-* Copyright (c) 2007, Yahoo! Inc. All rights reserved.
-* YUI licensed under the BSD License:
-* http://developer.yahoo.net/yui/license.txt
-*/
-Ext.lib.Ajax = function() {
-    var activeX = ['Msxml2.XMLHTTP.6.0',
-                   'Msxml2.XMLHTTP.3.0',
-                   'Msxml2.XMLHTTP'],
-        CONTENTTYPE = 'Content-Type';
-
-    // private
-    function setHeader(o) {
-        var conn = o.conn,
-            prop,
-            headers = {};
-
-        function setTheHeaders(conn, headers){
-            for (prop in headers) {
-                if (headers.hasOwnProperty(prop)) {
-                    conn.setRequestHeader(prop, headers[prop]);
-                }
-            }
-        }
-
-        Ext.apply(headers, pub.headers, pub.defaultHeaders);
-        setTheHeaders(conn, headers);
-        delete pub.headers;
-    }
-
-    // private
-    function createExceptionObject(tId, callbackArg, isAbort, isTimeout) {
-        return {
-            tId : tId,
-            status : isAbort ? -1 : 0,
-            statusText : isAbort ? 'transaction aborted' : 'communication failure',
-            isAbort: isAbort,
-            isTimeout: isTimeout,
-            argument : callbackArg
-        };
-    }
-
-    // private
-    function initHeader(label, value) {
-        (pub.headers = pub.headers || {})[label] = value;
-    }
-
-    // private
-    function createResponseObject(o, callbackArg) {
-        var headerObj = {},
-            headerStr,
-            conn = o.conn,
-            t,
-            s,
-            // see: https://prototype.lighthouseapp.com/projects/8886/tickets/129-ie-mangles-http-response-status-code-204-to-1223
-            isBrokenStatus = conn.status == 1223;
-
-        try {
-            headerStr = o.conn.getAllResponseHeaders();
-            Ext.each(headerStr.replace(/\r\n/g, '\n').split('\n'), function(v){
-                t = v.indexOf(':');
-                if(t >= 0){
-                    s = v.substr(0, t).toLowerCase();
-                    if(v.charAt(t + 1) == ' '){
-                        ++t;
-                    }
-                    headerObj[s] = v.substr(t + 1);
-                }
-            });
-        } catch(e) {}
-
-        return {
-            tId : o.tId,
-            // Normalize the status and statusText when IE returns 1223, see the above link.
-            status : isBrokenStatus ? 204 : conn.status,
-            statusText : isBrokenStatus ? 'No Content' : conn.statusText,
-            getResponseHeader : function(header){return headerObj[header.toLowerCase()];},
-            getAllResponseHeaders : function(){return headerStr;},
-            responseText : conn.responseText,
-            responseXML : conn.responseXML,
-            argument : callbackArg
-        };
-    }
-
-    // private
-    function releaseObject(o) {
-        if (o.tId) {
-            pub.conn[o.tId] = null;
-        }
-        o.conn = null;
-        o = null;
-    }
-
-    // private
-    function handleTransactionResponse(o, callback, isAbort, isTimeout) {
-        if (!callback) {
-            releaseObject(o);
-            return;
-        }
-
-        var httpStatus, responseObject;
-
-        try {
-            if (o.conn.status !== undefined && o.conn.status != 0) {
-                httpStatus = o.conn.status;
-            }
-            else {
-                httpStatus = 13030;
-            }
-        }
-        catch(e) {
-            httpStatus = 13030;
-        }
-
-        if ((httpStatus >= 200 && httpStatus < 300) || (Ext.isIE && httpStatus == 1223)) {
-            responseObject = createResponseObject(o, callback.argument);
-            if (callback.success) {
-                if (!callback.scope) {
-                    callback.success(responseObject);
-                }
-                else {
-                    callback.success.apply(callback.scope, [responseObject]);
-                }
-            }
-        }
-        else {
-            switch (httpStatus) {
-                case 12002:
-                case 12029:
-                case 12030:
-                case 12031:
-                case 12152:
-                case 13030:
-                    responseObject = createExceptionObject(o.tId, callback.argument, (isAbort ? isAbort : false), isTimeout);
-                    if (callback.failure) {
-                        if (!callback.scope) {
-                            callback.failure(responseObject);
-                        }
-                        else {
-                            callback.failure.apply(callback.scope, [responseObject]);
-                        }
-                    }
-                    break;
-                default:
-                    responseObject = createResponseObject(o, callback.argument);
-                    if (callback.failure) {
-                        if (!callback.scope) {
-                            callback.failure(responseObject);
-                        }
-                        else {
-                            callback.failure.apply(callback.scope, [responseObject]);
-                        }
-                    }
-            }
-        }
-
-        releaseObject(o);
-        responseObject = null;
-    }
-    
-    function checkResponse(o, callback, conn, tId, poll, cbTimeout){
-        if (conn && conn.readyState == 4) {
-            clearInterval(poll[tId]);
-            poll[tId] = null;
-
-            if (cbTimeout) {
-                clearTimeout(pub.timeout[tId]);
-                pub.timeout[tId] = null;
-            }
-            handleTransactionResponse(o, callback);
-        }
-    }
-    
-    function checkTimeout(o, callback){
-        pub.abort(o, callback, true);
-    }
-    
-
-    // private
-    function handleReadyState(o, callback){
-        callback = callback || {};
-        var conn = o.conn,
-            tId = o.tId,
-            poll = pub.poll,
-            cbTimeout = callback.timeout || null;
-
-        if (cbTimeout) {
-            pub.conn[tId] = conn;
-            pub.timeout[tId] = setTimeout(checkTimeout.createCallback(o, callback), cbTimeout);
-        }
-        poll[tId] = setInterval(checkResponse.createCallback(o, callback, conn, tId, poll, cbTimeout), pub.pollInterval);
-    }
-
-    // private
-    function asyncRequest(method, uri, callback, postData) {
-        var o = getConnectionObject() || null;
-
-        if (o) {
-            o.conn.open(method, uri, true);
-
-            if (pub.useDefaultXhrHeader) {
-                initHeader('X-Requested-With', pub.defaultXhrHeader);
-            }
-
-            if(postData && pub.useDefaultHeader && (!pub.headers || !pub.headers[CONTENTTYPE])){
-                initHeader(CONTENTTYPE, pub.defaultPostHeader);
-            }
-
-            if (pub.defaultHeaders || pub.headers) {
-                setHeader(o);
-            }
-
-            handleReadyState(o, callback);
-            o.conn.send(postData || null);
-        }
-        return o;
-    }
-
-    // private
-    function getConnectionObject() {
-        var o;
-
-        try {
-            if (o = createXhrObject(pub.transactionId)) {
-                pub.transactionId++;
-            }
-        } catch(e) {
-        } finally {
-            return o;
-        }
-    }
-
-    // private
-    function createXhrObject(transactionId) {
-        var http;
-
-        try {
-            http = new XMLHttpRequest();
-        } catch(e) {
-            for (var i = 0; i < activeX.length; ++i) {
-                try {
-                    http = new ActiveXObject(activeX[i]);
-                    break;
-                } catch(e) {}
-            }
-        } finally {
-            return {conn : http, tId : transactionId};
-        }
-    }
-
-    var pub = {
-        request : function(method, uri, cb, data, options) {
-            if(options){
-                var me = this,
-                    xmlData = options.xmlData,
-                    jsonData = options.jsonData,
-                    hs;
-
-                Ext.applyIf(me, options);
-
-                if(xmlData || jsonData){
-                    hs = me.headers;
-                    if(!hs || !hs[CONTENTTYPE]){
-                        initHeader(CONTENTTYPE, xmlData ? 'text/xml' : 'application/json');
-                    }
-                    data = xmlData || (!Ext.isPrimitive(jsonData) ? Ext.encode(jsonData) : jsonData);
-                }
-            }
-            return asyncRequest(method || options.method || "POST", uri, cb, data);
-        },
-
-        serializeForm : function(form) {
-            var fElements = form.elements || (document.forms[form] || Ext.getDom(form)).elements, 
-                hasSubmit = false, 
-                encoder = encodeURIComponent, 
-                name, 
-                data = '', 
-                type, 
-                hasValue;
-    
-            Ext.each(fElements, function(element){
-                name = element.name;
-                type = element.type;
-        
-                if (!element.disabled && name) {
-                    if (/select-(one|multiple)/i.test(type)) {
-                        Ext.each(element.options, function(opt){
-                            if (opt.selected) {
-                                hasValue = opt.hasAttribute ? opt.hasAttribute('value') : opt.getAttributeNode('value').specified;
-                                data += String.format("{0}={1}&", encoder(name), encoder(hasValue ? opt.value : opt.text));
-                            }
-                        });
-                    } else if (!(/file|undefined|reset|button/i.test(type))) {
-                        if (!(/radio|checkbox/i.test(type) && !element.checked) && !(type == 'submit' && hasSubmit)) {
-                            data += encoder(name) + '=' + encoder(element.value) + '&';
-                            hasSubmit = /submit/i.test(type);
-                        }
-                    }
-                }
-            });
-            return data.substr(0, data.length - 1);
-        },
-
-        useDefaultHeader : true,
-        defaultPostHeader : 'application/x-www-form-urlencoded; charset=UTF-8',
-        useDefaultXhrHeader : true,
-        defaultXhrHeader : 'XMLHttpRequest',
-        poll : {},
-        timeout : {},
-        conn: {},
-        pollInterval : 50,
-        transactionId : 0,
-
-//  This is never called - Is it worth exposing this?
-//          setProgId : function(id) {
-//              activeX.unshift(id);
-//          },
-
-//  This is never called - Is it worth exposing this?
-//          setDefaultPostHeader : function(b) {
-//              this.useDefaultHeader = b;
-//          },
-
-//  This is never called - Is it worth exposing this?
-//          setDefaultXhrHeader : function(b) {
-//              this.useDefaultXhrHeader = b;
-//          },
-
-//  This is never called - Is it worth exposing this?
-//          setPollingInterval : function(i) {
-//              if (typeof i == 'number' && isFinite(i)) {
-//                  this.pollInterval = i;
-//              }
-//          },
-
-//  This is never called - Is it worth exposing this?
-//          resetDefaultHeaders : function() {
-//              this.defaultHeaders = null;
-//          },
-
-        abort : function(o, callback, isTimeout) {
-            var me = this,
-                tId = o.tId,
-                isAbort = false;
-
-            if (me.isCallInProgress(o)) {
-                o.conn.abort();
-                clearInterval(me.poll[tId]);
-                me.poll[tId] = null;
-                clearTimeout(pub.timeout[tId]);
-                me.timeout[tId] = null;
-
-                handleTransactionResponse(o, callback, (isAbort = true), isTimeout);
-            }
-            return isAbort;
-        },
-
-        isCallInProgress : function(o) {
-            // if there is a connection and readyState is not 0 or 4
-            return o.conn && !{0:true,4:true}[o.conn.readyState];
-        }
-    };
-    return pub;
-}();</pre>    
-</body>
-</html>
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