// http://jquery.com/docs/ajax/
/**
- * Load HTML from a remote file and inject it into the DOM
+ * 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.load = function( url, params, callback ) {
- // I overwrote the event plugin's .load
- // this won't happen again, I hope -John
- if ( url && url.constructor == Function )
+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";
var self = this;
// Request the remote document
- jQuery.ajax( type, url, params,function(res){
-
- // Inject the HTML into all the matched elements
- self.html(res.responseText).each(function(){
- // If a callback function was provided
- if ( callback && callback.constructor == Function )
- // Execute it within the context of the element
- callback.apply( self, [res.responseText] );
- });
+ jQuery.ajax( type, url, params,function(res, status){
- // Execute all the scripts inside of the newly-injected HTML
- $("script", self).each(function(){
- eval( this.text || this.textContent || this.innerHTML || "");
- });
+ 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
+ $("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);
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 );
+};
+
// If IE is used, create a wrapper for the XMLHttpRequest object
-if ( jQuery.browser.msie )
+if ( jQuery.browser.msie && typeof XMLHttpRequest == "undefined" )
XMLHttpRequest = function(){
return new ActiveXObject(
navigator.userAgent.indexOf("MSIE 5") >= 0 ?
};
// Attach a bunch of functions for handling common AJAX events
+
+/**
+ * Attach a function to be executed whenever an AJAX request begins.
+ *
+ * @example $("#loading").ajaxStart(function(){
+ * $(this).show();
+ * });
+ * @desc Show a loading message whenever an AJAX request starts.
+ *
+ * @name ajaxStart
+ * @type jQuery
+ * @param Function callback The function to execute.
+ * @cat AJAX
+ */
+
+/**
+ * Attach a function to be executed whenever all AJAX requests have ended.
+ *
+ * @example $("#loading").ajaxStop(function(){
+ * $(this).hide();
+ * });
+ * @desc Hide a loading message after all the AJAX requests have stopped.
+ *
+ * @name ajaxStop
+ * @type jQuery
+ * @param Function callback The function to execute.
+ * @cat AJAX
+ */
+
+/**
+ * Attach a function to be executed whenever an AJAX request completes.
+ *
+ * @example $("#msg").ajaxComplete(function(){
+ * $(this).append("<li>Request Complete.</li>");
+ * });
+ * @desc Show a message when an AJAX request completes.
+ *
+ * @name ajaxComplete
+ * @type jQuery
+ * @param Function callback The function to execute.
+ * @cat AJAX
+ */
+
+/**
+ * Attach a function to be executed whenever an AJAX request completes
+ * successfully.
+ *
+ * @example $("#msg").ajaxSuccess(function(){
+ * $(this).append("<li>Successful Request!</li>");
+ * });
+ * @desc Show a message when an AJAX request completes successfully.
+ *
+ * @name ajaxSuccess
+ * @type jQuery
+ * @param Function callback The function to execute.
+ * @cat AJAX
+ */
+
+/**
+ * Attach a function to be executed whenever an AJAX request fails.
+ *
+ * @example $("#msg").ajaxError(function(){
+ * $(this).append("<li>Error requesting page.</li>");
+ * });
+ * @desc Show a message when an AJAX request fails.
+ *
+ * @name ajaxError
+ * @type jQuery
+ * @param Function callback The function to execute.
+ * @cat AJAX
+ */
+
new function(){
- var e = "ajaxStart,ajaxStop,ajaxComplete,ajaxError,ajaxSuccess".split(',');
+ var e = "ajaxStart,ajaxStop,ajaxComplete,ajaxError,ajaxSuccess".split(",");
for ( var i = 0; i < e.length; i++ ) new function(){
var o = e[i];
jQuery.fn[o] = function(f){
return this.bind(o, f);
};
- }
+ };
};
jQuery.extend({
/**
- * Load a remote page using a GET request
+ * Load a remote page using an HTTP GET request. All of the arguments to
+ * the method (except URL) are optional.
+ *
+ * @example $.get("test.cgi")
+ *
+ * @example $.get("test.cgi", { name: "John", time: "2pm" } )
+ *
+ * @example $.get("test.cgi", function(data){
+ * alert("Data Loaded: " + data);
+ * })
+ *
+ * @example $.get("test.cgi",
+ * { name: "John", time: "2pm" },
+ * function(data){
+ * alert("Data Loaded: " + data);
+ * }
+ * )
+ *
+ * @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].match(/blabla/), 'Check first tab' );
+ * ok( content[1].match(/blublu/), 'Check second tab' );
+ * start();
+ * });
+ *
+ * @name $.get
+ * @type jQuery
+ * @param String url The URL of the page 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
*/
- get: function( url, data, callback, type ) {
+ get: function( url, data, callback, type, ifModified ) {
if ( data.constructor == Function ) {
+ type = callback;
callback = data;
data = null;
}
- if ( data )
- url += "?" + jQuery.param(data);
+ if ( data ) url += "?" + jQuery.param(data);
// Build and start the HTTP Request
- jQuery.ajax( "GET", url, null, function(r) {
- if ( callback ) callback( jQuery.httpData(r,type) );
- });
+ jQuery.ajax( "GET", url, null, function(r, status) {
+ if ( callback ) callback( jQuery.httpData(r,type), status );
+ }, ifModified);
+ },
+
+ /**
+ * Load a remote page using an HTTP GET request, only if it hasn't
+ * been modified since it was last retrieved. All of the arguments to
+ * the method (except URL) are optional.
+ *
+ * @example $.getIfModified("test.html")
+ *
+ * @example $.getIfModified("test.html", { name: "John", time: "2pm" } )
+ *
+ * @example $.getIfModified("test.cgi", function(data){
+ * alert("Data Loaded: " + data);
+ * })
+ *
+ * @example $.getifModified("test.cgi",
+ * { name: "John", time: "2pm" },
+ * function(data){
+ * alert("Data Loaded: " + data);
+ * }
+ * )
+ *
+ * @name $.getIfModified
+ * @type jQuery
+ * @param String url The URL of the page 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
+ */
+ getIfModified: function( url, data, callback, type ) {
+ jQuery.get(url, data, callback, type, 1);
+ },
+
+ /**
+ * Loads, and executes, a remote JavaScript file using an HTTP GET request.
+ * All of the arguments to the method (except URL) are optional.
+ *
+ * @example $.getScript("test.js")
+ *
+ * @example $.getScript("test.js", function(){
+ * alert("Script loaded and executed.");
+ * })
+ *
+ *
+ * @name $.getScript
+ * @type jQuery
+ * @param String url The URL of the page to load.
+ * @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");
+ },
+
+ /**
+ * Load a remote JSON object using an HTTP GET request.
+ * All of the arguments to the method (except URL) are optional.
+ *
+ * @example $.getJSON("test.js", function(json){
+ * alert("JSON Data: " + json.users[3].name);
+ * })
+ *
+ * @example $.getJSON("test.js",
+ * { name: "John", time: "2pm" },
+ * function(json){
+ * alert("JSON Data: " + json.users[3].name);
+ * }
+ * )
+ *
+ * @name $.getJSON
+ * @type jQuery
+ * @param String url The URL of the page 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
+ */
+ getJSON: function( url, data, callback ) {
+ jQuery.get(url, data, callback, "json");
},
/**
- * Load a remote page using a POST request.
+ * Load a remote page using an HTTP POST request. All of the arguments to
+ * the method (except URL) are optional.
+ *
+ * @example $.post("test.cgi")
+ *
+ * @example $.post("test.cgi", { name: "John", time: "2pm" } )
+ *
+ * @example $.post("test.cgi", function(data){
+ * alert("Data Loaded: " + data);
+ * })
+ *
+ * @example $.post("test.cgi",
+ * { name: "John", time: "2pm" },
+ * function(data){
+ * alert("Data Loaded: " + data);
+ * }
+ * )
+ *
+ * @name $.post
+ * @type jQuery
+ * @param String url The URL of the page 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
*/
post: function( url, data, callback, type ) {
// Build and start the HTTP Request
- jQuery.ajax( "POST", url, jQuery.param(data), function(r) {
- if ( callback ) callback( jQuery.httpData(r,type) );
+ jQuery.ajax( "POST", url, jQuery.param(data), function(r, status) {
+ if ( callback ) callback( jQuery.httpData(r,type), status );
});
},
+ // timeout (ms)
+ timeout: 0,
+
+ /**
+ * Set the timeout of all AJAX requests to a specific amount of time.
+ * This will make all future AJAX requests timeout after a specified amount
+ * of time (the default is no timeout).
+ *
+ * @example $.ajaxTimeout( 5000 );
+ * @desc Make all AJAX requests timeout after 5 seconds.
+ *
+ * @name $.ajaxTimeout
+ * @type jQuery
+ * @param Number time How long before an AJAX request times out.
+ * @cat AJAX
+ */
+ ajaxTimeout: function(timeout) {
+ jQuery.timeout = timeout;
+ },
+
+ // Last-Modified header cache for next request
+ lastModified: {},
+
/**
- * A common wrapper for making XMLHttpRequests
+ * Load a remote page using an HTTP request. This function is the primary
+ * means of making AJAX requests using jQuery. $.ajax() takes one property,
+ * an object of key/value pairs, that're are used to initalize the request.
+ *
+ * These are all the key/values that can be passed in to 'prop':
+ *
+ * (String) type - The type of request to make (e.g. "POST" or "GET").
+ *
+ * (String) url - The URL of the page to request.
+ *
+ * (String) data - A string of data to be sent to the server (POST only).
+ *
+ * (String) dataType - The type of data that you're expecting back from
+ * the server (e.g. "xml", "html", "script", or "json").
+ *
+ * (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.
+ *
+ * (Function) success - A function to be called if the request succeeds. The
+ * function gets passed one argument: The data returned from the server,
+ * formatted according to the 'dataType' parameter.
+ *
+ * (Function) complete - A function to be called when the request finishes. The
+ * function gets passed two arguments: The XMLHttpRequest object and a
+ * string describing the type the success of the request.
+ *
+ * @example $.ajax({
+ * type: "GET",
+ * url: "test.js",
+ * dataType: "script"
+ * })
+ * @desc Load and execute a JavaScript file.
+ *
+ * @example $.ajax({
+ * type: "POST",
+ * url: "some.php",
+ * data: "name=John&location=Boston",
+ * success: function(msg){
+ * alert( "Data Saved: " + msg );
+ * }
+ * });
+ * @desc Save some data to the server and notify the user once its complete.
+ *
+ * @name $.ajax
+ * @type jQuery
+ * @param Hash prop A set of properties to initialize the request with.
+ * @cat AJAX
*/
- ajax: function( type, url, data, ret ) {
+ ajax: function( type, url, data, ret, ifModified ) {
// If only a single argument was passed in,
// assume that it is a object of key/value pairs
if ( !url ) {
ret = type.complete;
var success = type.success;
var error = type.error;
+ var dataType = type.dataType;
data = type.data;
url = type.url;
type = type.type;
// Watch for a new set of requests
if ( ! jQuery.active++ )
jQuery.event.trigger( "ajaxStart" );
+
+ var requestDone = false;
// Create the request object
var xml = new XMLHttpRequest();
// Set the correct header, if data is being sent
if ( data )
xml.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
-
+
+ // Set the If-Modified-Since header, if ifModified mode.
+ if ( ifModified )
+ 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
xml.setRequestHeader("X-Requested-With", "XMLHttpRequest");
// Make sure the browser sends the right content length
if ( xml.overrideMimeType )
xml.setRequestHeader("Connection", "close");
-
+
// Wait for a response to come back
- xml.onreadystatechange = function(){
- // The transfer is complete and the data is available
- if ( xml.readyState == 4 ) {
- // Make sure that the request was successful
- if ( jQuery.httpSuccess( xml ) ) {
+ var onreadystatechange = function(istimeout){
+ // The transfer is complete and the data is available, or the request timed out
+ if ( xml && (xml.readyState == 4 || istimeout == "timeout") ) {
+ requestDone = true;
+
+ var status = jQuery.httpSuccess( xml ) && istimeout != "timeout" ?
+ ifModified && jQuery.httpNotModified( xml, url ) ? "notmodified" : "success" : "error";
+ // 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;
+
// If a local callback was specified, fire it
- if ( success ) success( xml );
+ if ( success )
+ success( jQuery.httpData( xml, dataType ), status );
// Fire the global callback
jQuery.event.trigger( "ajaxSuccess" );
// Otherwise, the request was not successful
} else {
// If a local callback was specified, fire it
- if ( error ) error( xml );
+ if ( error ) error( xml, status );
// Fire the global callback
jQuery.event.trigger( "ajaxError" );
jQuery.event.trigger( "ajaxStop" );
// Process result
- if ( ret ) ret(xml);
-
+ if ( ret ) ret(xml, status);
+
// Stop memory leaks
xml.onreadystatechange = function(){};
xml = null;
+
}
};
-
+ xml.onreadystatechange = onreadystatechange;
+
+ // Timeout checker
+ if(jQuery.timeout > 0)
+ setTimeout(function(){
+ // Check to see if the request is still happening
+ if (xml) {
+ // Cancel the request
+ xml.abort();
+
+ if ( !requestDone ) onreadystatechange( "timeout" );
+
+ // Clear from memory
+ xml = null;
+ }
+ }, jQuery.timeout);
+
// Send the data
xml.send(data);
},
// Determines if an XMLHttpRequest was successful or not
httpSuccess: function(r) {
try {
- return r.status ?
- ( r.status >= 200 && r.status < 300 ) || r.status == 304 :
- location.protocol == "file:";
+ return !r.status && location.protocol == "file:" ||
+ ( r.status >= 200 && r.status < 300 ) || r.status == 304 ||
+ jQuery.browser.safari && r.status == undefined;
} catch(e){}
+
+ return false;
+ },
+
+ // Determines if an XMLHttpRequest returns NotModified
+ httpNotModified: function(xml, url) {
+ try {
+ var xmlRes = xml.getResponseHeader("Last-Modified");
+
+ // Firefox always returns 200. check Last-Modified date
+ return xml.status == 304 || xmlRes == jQuery.lastModified[url] ||
+ jQuery.browser.safari && xml.status == undefined;
+ } catch(e){}
+
return false;
},
- // Get the data out of an XMLHttpRequest.
- // Return parsed XML if content-type header is "xml" and type is "xml" or omitted,
- // otherwise return plain text.
+ /* Get the data out of an XMLHttpRequest.
+ * Return parsed XML if content-type header is "xml" and type is "xml" or omitted,
+ * otherwise return plain text.
+ * (String) data - The type of data that you're expecting back,
+ * (e.g. "xml", "html", "script")
+ */
httpData: function(r,type) {
var ct = r.getResponseHeader("content-type");
- var xml = ( !type || type == "xml" ) && ct && ct.indexOf("xml") >= 0;
- return xml ? r.responseXML : r.responseText;
+ var data = !type && ct && ct.indexOf("xml") >= 0;
+ data = type == "xml" || data ? r.responseXML : r.responseText;
+
+ // If the type is "script", eval it
+ if ( type == "script" ) eval.call( window, data );
+
+ // Get the JavaScript object, if JSON is used.
+ if ( type == "json" ) eval( "data = " + data );
+
+ return data;
},
// Serialize an array of form elements or a set of
// If an array was passed in, assume that it is an array
// of form elements
- if ( a.constructor == Array ) {
+ if ( a.constructor == Array || a.jquery ) {
// Serialize the form elements
for ( var i = 0; i < a.length; i++ )
s.push( a[i].name + "=" + encodeURIComponent( a[i].value ) );
git.asbjorn.biz / jquery.git / blobdiff