Removed (hopefully) all references to $ within the jQuery code itself
[jquery.git] / src / ajax / ajax.js
index a0e6462..5aeb943 100644 (file)
-// AJAX Plugin
-// Docs Here:
-// http://jquery.com/docs/ajax/
+jQuery.fn.extend({
 
-/**
- * Load HTML from a remote file and inject it into the DOM, only if it's
- * been modified by the server.
- *
- * @example $("#feeds").loadIfModified("feeds.html")
- * @before <div id="feeds"></div>
- * @result <div id="feeds"><b>45</b> feeds found.</div>
- *
- * @name loadIfModified
- * @type jQuery
- * @param String url The URL of the HTML file to load.
- * @param Hash params A set of key/value pairs that will be sent to the server.
- * @param Function callback A function to be executed whenever the data is loaded.
- * @cat AJAX
- */
-jQuery.fn.loadIfModified = function( url, params, callback ) {
-       this.load( url, params, callback, 1 );
-};
-
-/**
- * Load HTML from a remote file and inject it into the DOM.
- *
- * @example $("#feeds").load("feeds.html")
- * @before <div id="feeds"></div>
- * @result <div id="feeds"><b>45</b> feeds found.</div>
- *
- * @name load
- * @type jQuery
- * @param String url The URL of the HTML file to load.
- * @param Hash params A set of key/value pairs that will be sent to the server.
- * @param Function callback A function to be executed whenever the data is loaded.
- * @cat AJAX
- */
-jQuery.fn.load = function( url, params, callback, ifModified ) {
-       if ( url.constructor == Function )
-               return this.bind("load", url);
-
-       callback = callback || function(){};
-
-       // Default to a GET request
-       var type = "GET";
+       /**
+        * Load HTML from a remote file and inject it into the DOM, only if it's
+        * been modified by the server.
+        *
+        * @example $("#feeds").loadIfModified("feeds.html")
+        * @before <div id="feeds"></div>
+        * @result <div id="feeds"><b>45</b> feeds found.</div>
+        *
+        * @name loadIfModified
+        * @type jQuery
+        * @param String url The URL of the HTML file to load.
+        * @param Hash params A set of key/value pairs that will be sent to the server.
+        * @param Function callback A function to be executed whenever the data is loaded.
+        * @cat AJAX
+        */
+       loadIfModified: function( url, params, callback ) {
+               this.load( url, params, callback, 1 );
+       },
 
-       // If the second parameter was provided
-       if ( params ) {
-               // If it's a function
-               if ( params.constructor == Function ) {
-                       // We assume that it's the callback
-                       callback = params;
-                       params = null;
-                       
-               // Otherwise, build a param string
-               } else {
-                       params = jQuery.param( params );
-                       type = "POST";
-               }
-       }
+       /**
+        * Load HTML from a remote file and inject it into the DOM.
+        *
+        * @example $("#feeds").load("feeds.html")
+        * @before <div id="feeds"></div>
+        * @result <div id="feeds"><b>45</b> feeds found.</div>
+        *
+        * @example $("#feeds").load("feeds.html",
+        *   {test: true},
+        *   function() { alert("load is done"); }
+        * );
+        * @desc Same as above, but with an additional parameter
+        * and a callback that is executed when the data was loaded.
+        *
+        * @test stop();
+        * $('#first').load("data/name.php", function() {
+        *      ok( $('#first').text() == 'ERROR', 'Check if content was injected into the DOM' );
+        *      start();
+        * });
+        *
+        * @test stop(); // check if load can be called with only url
+        * $('#first').load("data/name.php");
+        * setTimeout(function() {
+        *   ok( $('#first').text() == 'ERROR', 'Check if load works without callback');
+        *   start();
+        * }, 100);
+        *
+        * @name load
+        * @type jQuery
+        * @param String url The URL of the HTML file to load.
+        * @param Hash params A set of key/value pairs that will be sent to the server.
+        * @param Function callback A function to be executed whenever the data is loaded.
+        * @cat AJAX
+        */
+       load: function( url, params, callback, ifModified ) {
+               if ( url.constructor == Function )
+                       return this.bind("load", url);
        
-       var self = this;
+               callback = callback || function(){};
        
-       // Request the remote document
-       jQuery.ajax( type, url, params,function(res, status){
+               // Default to a GET request
+               var type = "GET";
+       
+               // If the second parameter was provided
+               if ( params ) {
+                       // If it's a function
+                       if ( params.constructor == Function ) {
+                               // We assume that it's the callback
+                               callback = params;
+                               params = null;
+                               
+                       // Otherwise, build a param string
+                       } else {
+                               params = jQuery.param( params );
+                               type = "POST";
+                       }
+               }
+               
+               var self = this;
                
-               if ( status == "success" || !ifModified && status == "notmodified" ) {
-                       // Inject the HTML into all the matched elements
-                       self.html(res.responseText).each( callback, [res.responseText, status] );
+               // Request the remote document
+               jQuery.ajax( type, url, params,function(res, status){
                        
-                       // Execute all the scripts inside of the newly-injected HTML
-                       $("script", self).each(function(){
-                               if ( this.src )
-                                       $.getScript( this.src );
-                               else
-                                       eval.call( window, this.text || this.textContent || this.innerHTML || "" );
-                       });
-               } else
-                       callback.apply( self, [res.responseText, status] );
-
-       }, ifModified);
+                       if ( status == "success" || !ifModified && status == "notmodified" ) {
+                               // Inject the HTML into all the matched elements
+                               self.html(res.responseText).each( callback, [res.responseText, status] );
+                               
+                               // Execute all the scripts inside of the newly-injected HTML
+                               jQuery("script", self).each(function(){
+                                       if ( this.src )
+                                               jQuery.getScript( this.src );
+                                       else
+                                               eval.call( window, this.text || this.textContent || this.innerHTML || "" );
+                               });
+                       } else
+                               callback.apply( self, [res.responseText, status] );
        
-       return this;
-};
+               }, ifModified);
+               
+               return this;
+       },
 
-/**
- * A function for serializing a set of input elements into
- * a string of data.
- *
- * @example $("input[@type=text]").serialize();
- * @before <input type='text' name='name' value='John'/>
- * <input type='text' name='location' value='Boston'/>
- * @after name=John&location=Boston
- * @desc Serialize a selection of input elements to a string
- *
- * @name serialize
- * @type String
- * @cat AJAX
- */
-jQuery.fn.serialize = function(){
-       return $.param( this );
-};
+       /**
+        * Serializes a set of input elements into a string of data.
+        * This will serialize all given elements. If you need 
+        * serialization similar to the form submit of a browser,
+        * you should use the form plugin. This is also true for
+        * selects with multiple attribute set, only a single option
+        * is serialized.
+        *
+        * @example $("input[@type=text]").serialize();
+        * @before <input type='text' name='name' value='John'/>
+        * <input type='text' name='location' value='Boston'/>
+        * @after name=John&location=Boston
+        * @desc Serialize a selection of input elements to a string
+        *
+        * @test var data = $(':input').not('button').serialize();
+        * // ignore button, IE takes text content as value, not relevant for this test
+        * ok( data == 'action=Test&text2=Test&radio1=on&radio2=on&check=on&=on&hidden=&foo[bar]=&name=name&=foobar&select1=&select2=3&select3=1', 'Check form serialization as query string' );
+        *
+        * @name serialize
+        * @type String
+        * @cat AJAX
+        */
+       serialize: function() {
+               return jQuery.param( this );
+       }
+       
+});
 
 // If IE is used, create a wrapper for the XMLHttpRequest object
 if ( jQuery.browser.msie && typeof XMLHttpRequest == "undefined" )
@@ -182,6 +210,51 @@ if ( jQuery.browser.msie && typeof XMLHttpRequest == "undefined" )
  * @param Function callback The function to execute.
  * @cat AJAX
  */
+/**
+ * @test stop(); var counter = { complete: 0, success: 0, error: 0 };
+ * var success = function() { counter.success++ };
+ * var error = function() { counter.error++ };
+ * var complete = function() { counter.complete++ };
+ * $('#foo').ajaxStart(complete).ajaxStop(complete).ajaxComplete(complete).ajaxError(error).ajaxSuccess(success);
+ * // start with successful test
+ * $.ajax({url: "data/name.php", success: success, error: error, complete: function() {
+ *   ok( counter.error == 0, 'Check succesful request' );
+ *   ok( counter.success == 2, 'Check succesful request' );
+ *   ok( counter.complete == 3, 'Check succesful request' );
+ *   counter.error = 0; counter.success = 0; counter.complete = 0;
+ *   $.ajaxTimeout(500);
+ *   $.ajax({url: "data/name.php?wait=5", success: success, error: error, complete: function() {
+ *     ok( counter.error == 2, 'Check failed request' );
+ *     ok( counter.success == 0, 'Check failed request' );
+ *     ok( counter.complete == 3, 'Check failed request' );
+ *     start();
+ *   }});
+ * }});
+ * @test stop(); var counter = { complete: 0, success: 0, error: 0 };
+ * counter.error = 0; counter.success = 0; counter.complete = 0;
+ * var success = function() { counter.success++ };
+ * var error = function() { counter.error++ };
+ * $.ajaxTimeout(0);
+ * $.ajax({url: "data/name.php", global: false, success: success, error: error, complete: function() {
+ *   ok( counter.error == 0, 'Check sucesful request without globals' );
+ *   ok( counter.success == 1, 'Check sucesful request without globals' );
+ *   ok( counter.complete == 0, 'Check sucesful request without globals' );
+ *   counter.error = 0; counter.success = 0; counter.complete = 0;
+ *   $.ajaxTimeout(500);
+ *   $.ajax({url: "data/name.php?wait=5", global: false, success: success, error: error, complete: function() {
+ *      ok( counter.error == 1, 'Check failed request without globals' );
+ *      ok( counter.success == 0, 'Check failed request without globals' );
+ *      ok( counter.complete == 0, 'Check failed request without globals' );
+ *      start();
+ *   }});
+ * }});
+ * 
+ * @name ajaxHandlersTesting
+ * @private
+ */
 
 new function(){
        var e = "ajaxStart,ajaxStop,ajaxComplete,ajaxError,ajaxSuccess".split(",");
@@ -215,19 +288,6 @@ jQuery.extend({
         *   }
         * )
         *
-        * @test stop();
-        * $.get("data/dashboard.xml", function(xml) {
-        *     var content = [];
-     *     $('tab', xml).each(function(k) {
-     *         // workaround for IE needed here, $(this).text() throws an error
-     *         // content[k] = $.trim(this.firstChild.data) || $(this).text();
-     *         content[k] = $(this).text();
-     *     });
-        *         ok( content[0] && content[0].match(/blabla/), 'Check first tab' );
-        *     ok( content[1] && content[1].match(/blublu/), 'Check second tab' );
-        *     start();
-        * });
-        *
         * @name $.get
         * @type jQuery
         * @param String url The URL of the page to load.
@@ -242,7 +302,8 @@ jQuery.extend({
                        data = null;
                }
                
-               if ( data ) url += "?" + jQuery.param(data);
+               // append ? + data or & + data, in case there are already params
+               if ( data ) url += ((url.indexOf("?") > -1) ? "&" : "?") + jQuery.param(data);
                
                // Build and start the HTTP Request
                jQuery.ajax( "GET", url, null, function(r, status) {
@@ -270,6 +331,12 @@ jQuery.extend({
         *   }
         * )
         *
+        * @test stop();
+        * $.getIfModified("data/name.php", function(msg) {
+        *     ok( msg == 'ERROR', 'Check ifModified' );
+        *     start();
+        * });
+        *
         * @name $.getIfModified
         * @type jQuery
         * @param String url The URL of the page to load.
@@ -291,6 +358,11 @@ jQuery.extend({
         *   alert("Script loaded and executed.");
         * })
         *
+        * @test stop();
+        * $.getScript("data/test.js", function() {
+        *      ok( foobar == "bar", 'Check if script was evaluated' );
+        *      start();
+        * });
         *
         * @name $.getScript
         * @type jQuery
@@ -298,8 +370,8 @@ jQuery.extend({
         * @param Function callback A function to be executed whenever the data is loaded.
         * @cat AJAX
         */
-       getScript: function( url, data, callback ) {
-               jQuery.get(url, data, callback, "script");
+       getScript: function( url, callback ) {
+               jQuery.get(url, callback, "script");
        },
        
        /**
@@ -317,6 +389,21 @@ jQuery.extend({
         *   }
         * )
         *
+        * @test stop();
+        * $.getJSON("data/json.php", {json: "array"}, function(json) {
+        *   ok( json[0].name == 'John', 'Check JSON: first, name' );
+        *   ok( json[0].age == 21, 'Check JSON: first, age' );
+        *   ok( json[1].name == 'Peter', 'Check JSON: second, name' );
+        *   ok( json[1].age == 25, 'Check JSON: second, age' );
+        *   start();
+        * });
+        * @test stop();
+        * $.getJSON("data/json.php", function(json) {
+        *   ok( json.data.lang == 'en', 'Check JSON: lang' );
+        *   ok( json.data.length == 25, 'Check JSON: length' );
+        *   start();
+        * });
+        *
         * @name $.getJSON
         * @type jQuery
         * @param String url The URL of the page to load.
@@ -325,7 +412,11 @@ jQuery.extend({
         * @cat AJAX
         */
        getJSON: function( url, data, callback ) {
-               jQuery.get(url, data, callback, "json");
+               if(callback)
+                       jQuery.get(url, data, callback, "json");
+               else {
+                       jQuery.get(url, data, "json");
+               }
        },
        
        /**
@@ -347,6 +438,15 @@ jQuery.extend({
         *   }
         * )
         *
+        * @test stop();
+        * $.post("data/name.php", {xml: "5-2"}, function(xml){
+        *   $('math', xml).each(function() {
+        *          ok( $('calculation', this).text() == '5-2', 'Check for XML' );
+        *          ok( $('result', this).text() == '3', 'Check for XML' );
+        *       });
+        *   start();
+        * });
+        *
         * @name $.post
         * @type jQuery
         * @param String url The URL of the page to load.
@@ -372,6 +472,50 @@ jQuery.extend({
         * @example $.ajaxTimeout( 5000 );
         * @desc Make all AJAX requests timeout after 5 seconds.
         *
+        * @test stop();
+        * var passed = 0;
+        * var timeout;
+        * $.ajaxTimeout(1000);
+        * var pass = function() {
+        *      passed++;
+        *      if(passed == 2) {
+        *              ok( true, 'Check local and global callbacks after timeout' );
+        *              clearTimeout(timeout);
+        *      $('#main').unbind("ajaxError");
+        *              start();
+        *      }
+        * };
+        * var fail = function() {
+        *      ok( false, 'Check for timeout failed' );
+        *      start();
+        * };
+        * timeout = setTimeout(fail, 1500);
+        * $('#main').ajaxError(pass);
+        * $.ajax({
+        *   type: "GET",
+        *   url: "data/name.php?wait=5",
+        *   error: pass,
+        *   success: fail
+        * });
+        *
+        * @test stop(); $.ajaxTimeout(50);
+        * $.ajax({
+        *   type: "GET",
+        *   timeout: 5000,
+        *   url: "data/name.php?wait=1",
+        *   error: function() {
+        *         ok( false, 'Check for local timeout failed' );
+        *         start();
+        *   },
+        *   success: function() {
+        *     ok( true, 'Check for local timeout' );
+        *     start();
+        *   }
+        * });
+        * // reset timeout
+        * $.ajaxTimeout(0);
+        * 
+        *
         * @name $.ajaxTimeout
         * @type jQuery
         * @param Number time How long before an AJAX request times out.
@@ -400,6 +544,18 @@ jQuery.extend({
         * (String) dataType - The type of data that you're expecting back from
         * the server (e.g. "xml", "html", "script", or "json").
         *
+        * (Boolean) ifModified - Allow the request to be successful only if the
+        * response has changed since the last request, default is false, ignoring
+        * the Last-Modified header
+        *
+        * (Number) timeout - Local timeout to override global timeout, eg. to give a
+        * single request a longer timeout while all others timeout after 1 seconds,
+        * see $.ajaxTimeout
+        *
+        * (Boolean) global - Wheather to trigger global AJAX event handlers for
+        * this request, default is true. Set to true to prevent that global handlers
+        * like ajaxStart or ajaxStop are triggered.
+        *
         * (Function) error - A function to be called if the request fails. The
         * function gets passed two arguments: The XMLHttpRequest object and a
         * string describing the type of error that occurred.
@@ -429,6 +585,27 @@ jQuery.extend({
         * });
         * @desc Save some data to the server and notify the user once its complete.
         *
+        * @test stop();
+        * $.ajax({
+        *   type: "GET",
+        *   url: "data/name.php?name=foo",
+        *   success: function(msg){
+        *     ok( msg == 'bar', 'Check for GET' );
+        *     start();
+        *   }
+        * });
+        *
+        * @test stop();
+        * $.ajax({
+        *   type: "POST",
+        *   url: "data/name.php",
+        *   data: "name=peter",
+        *   success: function(msg){
+        *     ok( msg == 'pan', 'Check for POST' );
+        *     start();
+        *   }
+        * });
+        *
         * @name $.ajax
         * @type jQuery
         * @param Hash prop A set of properties to initialize the request with.
@@ -442,13 +619,16 @@ jQuery.extend({
                        var success = type.success;
                        var error = type.error;
                        var dataType = type.dataType;
+                       var global = typeof type.global == "boolean" ? type.global : true;
+                       var timeout = typeof type.timeout == "number" ? type.timeout : jQuery.timeout;
+                       var ifModified = type.ifModified || false;
                        data = type.data;
                        url = type.url;
                        type = type.type;
                }
                
                // Watch for a new set of requests
-               if ( ! jQuery.active++ )
+               if ( global && ! jQuery.active++ )
                        jQuery.event.trigger( "ajaxStart" );
 
                var requestDone = false;
@@ -468,7 +648,7 @@ jQuery.extend({
                        xml.setRequestHeader("If-Modified-Since",
                                jQuery.lastModified[url] || "Thu, 01 Jan 1970 00:00:00 GMT" );
                
-               // Set header so calling script knows that it's an XMLHttpRequest
+               // Set header so the called script knows that it's an XMLHttpRequest
                xml.setRequestHeader("X-Requested-With", "XMLHttpRequest");
        
                // Make sure the browser sends the right content length
@@ -487,15 +667,21 @@ jQuery.extend({
                                // Make sure that the request was successful or notmodified
                                if ( status != "error" ) {
                                        // Cache Last-Modified header, if ifModified mode.
-                                       var modRes = xml.getResponseHeader("Last-Modified");
-                                       if ( ifModified && modRes ) jQuery.lastModified[url] = modRes;
+                                       var modRes;
+                                       try {
+                                               modRes = xml.getResponseHeader("Last-Modified");
+                                       } catch(e) {} // swallow exception thrown by FF if header is not available
+                                       
+                                       if ( ifModified && modRes )
+                                               jQuery.lastModified[url] = modRes;
                                        
                                        // If a local callback was specified, fire it
                                        if ( success )
                                                success( jQuery.httpData( xml, dataType ), status );
                                        
                                        // Fire the global callback
-                                       jQuery.event.trigger( "ajaxSuccess" );
+                                       if( global )
+                                               jQuery.event.trigger( "ajaxSuccess" );
                                
                                // Otherwise, the request was not successful
                                } else {
@@ -503,14 +689,16 @@ jQuery.extend({
                                        if ( error ) error( xml, status );
                                        
                                        // Fire the global callback
-                                       jQuery.event.trigger( "ajaxError" );
+                                       if( global )
+                                               jQuery.event.trigger( "ajaxError" );
                                }
                                
                                // The request was completed
-                               jQuery.event.trigger( "ajaxComplete" );
+                               if( global )
+                                       jQuery.event.trigger( "ajaxComplete" );
                                
                                // Handle the global AJAX counter
-                               if ( ! --jQuery.active )
+                               if ( global && ! --jQuery.active )
                                        jQuery.event.trigger( "ajaxStop" );
        
                                // Process result
@@ -525,7 +713,7 @@ jQuery.extend({
                xml.onreadystatechange = onreadystatechange;
                
                // Timeout checker
-               if(jQuery.timeout > 0)
+               if(timeout > 0)
                        setTimeout(function(){
                                // Check to see if the request is still happening
                                if (xml) {
@@ -537,7 +725,7 @@ jQuery.extend({
                                        // Clear from memory
                                        xml = null;
                                }
-                       }, jQuery.timeout);
+                       }, timeout);
                
                // Send the data
                xml.send(data);