jquery/src/ajax.js

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var jsc = now(),
rscript = /<script(.|\s)*?\/script>/g,
rselectTextarea = /select|textarea/i,
rinput = /text|hidden|password|search/i,
jsre = /=\?(&|$)/,
rquery = /\?/,
rts = /(\?|&)_=.*?(&|$)/,
rurl = /^(\w+:)?\/\/([^\/?#]+)/,
r20 = /%20/g;
jQuery.fn.extend({
// Keep a copy of the old load
_load: jQuery.fn.load,
load: function( url, params, callback ) {
if ( typeof url !== "string" ) {
return this._load( url );
}
var off = url.indexOf(" ");
if ( off >= 0 ) {
var selector = url.slice(off, url.length);
url = url.slice(0, off);
}
// Default to a GET request
var type = "GET";
// If the second parameter was provided
if ( params ) {
// If it's a function
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if ( jQuery.isFunction( params ) ) {
// We assume that it's the callback
callback = params;
params = null;
// Otherwise, build a param string
} else if ( typeof params === "object" ) {
params = jQuery.param( params );
type = "POST";
}
}
// Request the remote document
jQuery.ajax({
url: url,
type: type,
dataType: "html",
data: params,
context:this,
complete: function(res, status){
// If successful, inject the HTML into all the matched elements
if ( status === "success" || status === "notmodified" ) {
// See if a selector was specified
this.html( selector ?
// Create a dummy div to hold the results
jQuery("<div />")
// inject the contents of the document in, removing the scripts
// to avoid any 'Permission Denied' errors in IE
.append(res.responseText.replace(rscript, ""))
// Locate the specified elements
.find(selector) :
// If not, just inject the full result
res.responseText );
}
if ( callback ) {
this.each( callback, [res.responseText, status, res] );
}
}
});
return this;
},
serialize: function() {
return jQuery.param(this.serializeArray());
},
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serializeArray: function() {
return this.map(function(){
return this.elements ? jQuery.makeArray(this.elements) : this;
})
.filter(function(){
return this.name && !this.disabled &&
(this.checked || rselectTextarea.test(this.nodeName) ||
rinput.test(this.type));
})
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.map(function(i, elem){
var val = jQuery(this).val();
return val == null ?
null :
jQuery.isArray(val) ?
jQuery.map( val, function(val, i){
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return {name: elem.name, value: val};
}) :
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{name: elem.name, value: val};
}).get();
}
});
// Attach a bunch of functions for handling common AJAX events
jQuery.each( "ajaxStart,ajaxStop,ajaxComplete,ajaxError,ajaxSuccess,ajaxSend".split(","), function(i,o){
jQuery.fn[o] = function(f){
return this.bind(o, f);
};
});
jQuery.extend({
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get: function( url, data, callback, type ) {
// shift arguments if data argument was omited
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if ( jQuery.isFunction( data ) ) {
type = type || callback;
callback = data;
data = null;
}
return jQuery.ajax({
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type: "GET",
url: url,
data: data,
success: callback,
dataType: type
});
},
getScript: function( url, callback ) {
return jQuery.get(url, null, callback, "script");
},
getJSON: function( url, data, callback ) {
return jQuery.get(url, data, callback, "json");
},
post: function( url, data, callback, type ) {
// shift arguments if data argument was omited
if ( jQuery.isFunction( data ) ) {
type = type || callback;
callback = data;
data = {};
}
return jQuery.ajax({
type: "POST",
url: url,
data: data,
success: callback,
dataType: type
});
},
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ajaxSetup: function( settings ) {
jQuery.extend( jQuery.ajaxSettings, settings );
},
ajaxSettings: {
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url: location.href,
global: true,
type: "GET",
contentType: "application/x-www-form-urlencoded",
processData: true,
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async: true,
/*
timeout: 0,
data: null,
username: null,
password: null,
*/
// Create the request object; Microsoft failed to properly
// implement the XMLHttpRequest in IE7, so we use the ActiveXObject when it is available
// This function can be overriden by calling jQuery.ajaxSetup
xhr: function(){
return window.ActiveXObject ?
new ActiveXObject("Microsoft.XMLHTTP") :
new XMLHttpRequest();
},
accepts: {
xml: "application/xml, text/xml",
html: "text/html",
script: "text/javascript, application/javascript",
json: "application/json, text/javascript",
text: "text/plain",
_default: "*/*"
}
},
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// Last-Modified header cache for next request
lastModified: {},
etag: {},
ajax: function( s ) {
// Extend the settings, but re-extend 's' so that it can be
// checked again later (in the test suite, specifically)
s = jQuery.extend(true, s, jQuery.extend(true, {}, jQuery.ajaxSettings, s));
var jsonp, status, data,
callbackContext = s.context || window,
type = s.type.toUpperCase();
// convert data if not already a string
if ( s.data && s.processData && typeof s.data !== "string" ) {
s.data = jQuery.param(s.data);
}
// Handle JSONP Parameter Callbacks
if ( s.dataType === "jsonp" ) {
if ( type === "GET" ) {
if ( !jsre.test( s.url ) ) {
s.url += (rquery.test( s.url ) ? "&" : "?") + (s.jsonp || "callback") + "=?";
}
} else if ( !s.data || !jsre.test(s.data) ) {
s.data = (s.data ? s.data + "&" : "") + (s.jsonp || "callback") + "=?";
}
s.dataType = "json";
}
// Build temporary JSONP function
if ( s.dataType === "json" && (s.data && jsre.test(s.data) || jsre.test(s.url)) ) {
jsonp = "jsonp" + jsc++;
// Replace the =? sequence both in the query string and the data
if ( s.data ) {
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s.data = (s.data + "").replace(jsre, "=" + jsonp + "$1");
}
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s.url = s.url.replace(jsre, "=" + jsonp + "$1");
// We need to make sure
// that a JSONP style response is executed properly
s.dataType = "script";
// Handle JSONP-style loading
window[ jsonp ] = function(tmp){
data = tmp;
success();
complete();
// Garbage collect
window[ jsonp ] = undefined;
try{ delete window[ jsonp ]; } catch(e){}
if ( head ) {
head.removeChild( script );
}
};
}
if ( s.dataType === "script" && s.cache === null ) {
s.cache = false;
}
if ( s.cache === false && type === "GET" ) {
var ts = now();
// try replacing _= if it is there
var ret = s.url.replace(rts, "$1_=" + ts + "$2");
// if nothing was replaced, add timestamp to the end
s.url = ret + ((ret === s.url) ? (rquery.test(s.url) ? "&" : "?") + "_=" + ts : "");
}
// If data is available, append data to url for get requests
if ( s.data && type === "GET" ) {
s.url += (rquery.test(s.url) ? "&" : "?") + s.data;
}
// Watch for a new set of requests
if ( s.global && ! jQuery.active++ ) {
jQuery.event.trigger( "ajaxStart" );
}
// Matches an absolute URL, and saves the domain
var parts = rurl.exec( s.url );
// If we're requesting a remote document
// and trying to load JSON or Script with a GET
if ( s.dataType === "script" && type === "GET" && parts
&& ( parts[1] && parts[1] !== location.protocol || parts[2] !== location.host )) {
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var head = document.getElementsByTagName("head")[0] || document.documentElement;
var script = document.createElement("script");
script.src = s.url;
if ( s.scriptCharset ) {
script.charset = s.scriptCharset;
}
// Handle Script loading
if ( !jsonp ) {
var done = false;
// Attach handlers for all browsers
script.onload = script.onreadystatechange = function(){
if ( !done && (!this.readyState ||
this.readyState === "loaded" || this.readyState === "complete") ) {
done = true;
success();
complete();
// Handle memory leak in IE
script.onload = script.onreadystatechange = null;
if ( head && script.parentNode ) {
head.removeChild( script );
}
}
};
}
// Use insertBefore instead of appendChild to circumvent an IE6 bug.
// This arises when a base node is used (#2709 and #4378).
head.insertBefore( script, head.firstChild );
// We handle everything using the script element injection
return undefined;
}
var requestDone = false;
// Create the request object
var xhr = s.xhr();
// Open the socket
// Passing null username, generates a login popup on Opera (#2865)
if ( s.username ) {
xhr.open(type, s.url, s.async, s.username, s.password);
} else {
xhr.open(type, s.url, s.async);
}
// Need an extra try/catch for cross domain requests in Firefox 3
try {
// Set the correct header, if data is being sent
if ( s.data ) {
xhr.setRequestHeader("Content-Type", s.contentType);
}
// Set the If-Modified-Since and/or If-None-Match header, if in ifModified mode.
if ( s.ifModified ) {
if ( jQuery.lastModified[s.url] ) {
xhr.setRequestHeader("If-Modified-Since", jQuery.lastModified[s.url]);
}
if ( jQuery.etag[s.url] ) {
xhr.setRequestHeader("If-None-Match", jQuery.etag[s.url]);
}
}
// Set header so the called script knows that it's an XMLHttpRequest
xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest");
// Set the Accepts header for the server, depending on the dataType
xhr.setRequestHeader("Accept", s.dataType && s.accepts[ s.dataType ] ?
s.accepts[ s.dataType ] + ", */*" :
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s.accepts._default );
} catch(e){}
// Allow custom headers/mimetypes and early abort
if ( s.beforeSend && s.beforeSend.call(callbackContext, xhr, s) === false ) {
// Handle the global AJAX counter
if ( s.global && ! --jQuery.active ) {
jQuery.event.trigger( "ajaxStop" );
}
// close opended socket
xhr.abort();
return false;
}
if ( s.global ) {
trigger("ajaxSend", [xhr, s]);
}
// Wait for a response to come back
var onreadystatechange = function(isTimeout){
// The request was aborted, clear the interval and decrement jQuery.active
if ( !xhr || xhr.readyState === 0 ) {
if ( ival ) {
// clear poll interval
clearInterval( ival );
ival = null;
// Handle the global AJAX counter
if ( s.global && ! --jQuery.active ) {
jQuery.event.trigger( "ajaxStop" );
}
}
// The transfer is complete and the data is available, or the request timed out
} else if ( !requestDone && xhr && (xhr.readyState === 4 || isTimeout === "timeout") ) {
requestDone = true;
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// clear poll interval
if (ival) {
clearInterval(ival);
ival = null;
}
status = isTimeout === "timeout" ?
"timeout" :
!jQuery.httpSuccess( xhr ) ?
"error" :
s.ifModified && jQuery.httpNotModified( xhr, s.url ) ?
"notmodified" :
"success";
if ( status === "success" ) {
// Watch for, and catch, XML document parse errors
try {
// process the data (runs the xml through httpData regardless of callback)
data = jQuery.httpData( xhr, s.dataType, s );
} catch(e) {
status = "parsererror";
}
}
// Make sure that the request was successful or notmodified
if ( status === "success" || status === "notmodified" ) {
// JSONP handles its own success callback
if ( !jsonp ) {
success();
}
} else {
jQuery.handleError(s, xhr, status);
}
// Fire the complete handlers
complete();
if ( isTimeout ) {
xhr.abort();
}
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// Stop memory leaks
if ( s.async ) {
xhr = null;
}
}
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};
if ( s.async ) {
// don't attach the handler to the request, just poll it instead
var ival = setInterval(onreadystatechange, 13);
// Timeout checker
if ( s.timeout > 0 ) {
setTimeout(function(){
// Check to see if the request is still happening
if ( xhr && !requestDone ) {
onreadystatechange( "timeout" );
}
}, s.timeout);
}
}
// Send the data
try {
xhr.send( type === "POST" || type === "PUT" ? s.data : null );
} catch(e) {
jQuery.handleError(s, xhr, null, e);
}
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// firefox 1.5 doesn't fire statechange for sync requests
if ( !s.async ) {
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onreadystatechange();
}
function success(){
// If a local callback was specified, fire it and pass it the data
if ( s.success ) {
s.success.call( callbackContext, data, status );
}
// Fire the global callback
if ( s.global ) {
trigger( "ajaxSuccess", [xhr, s] );
}
}
function complete(){
// Process result
if ( s.complete ) {
s.complete.call( callbackContext, xhr, status);
}
// The request was completed
if ( s.global ) {
trigger( "ajaxComplete", [xhr, s] );
}
// Handle the global AJAX counter
if ( s.global && ! --jQuery.active ) {
jQuery.event.trigger( "ajaxStop" );
}
}
function trigger(type, args){
(s.context ? jQuery(s.context) : jQuery.event).trigger(type, args);
}
// return XMLHttpRequest to allow aborting the request etc.
return xhr;
},
handleError: function( s, xhr, status, e ) {
// If a local callback was specified, fire it
if ( s.error ) {
s.error.call( s.context || window, xhr, status, e );
}
// Fire the global callback
if ( s.global ) {
(s.context ? jQuery(s.context) : jQuery.event).trigger( "ajaxError", [xhr, s, e] );
}
},
// Counter for holding the number of active queries
active: 0,
// Determines if an XMLHttpRequest was successful or not
httpSuccess: function( xhr ) {
try {
// IE error sometimes returns 1223 when it should be 204 so treat it as success, see #1450
return !xhr.status && location.protocol === "file:" ||
// Opera returns 0 when status is 304
( xhr.status >= 200 && xhr.status < 300 ) ||
xhr.status === 304 || xhr.status === 1223 || xhr.status === 0;
} catch(e){}
return false;
},
// Determines if an XMLHttpRequest returns NotModified
httpNotModified: function( xhr, url ) {
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var lastModified = xhr.getResponseHeader("Last-Modified"),
etag = xhr.getResponseHeader("Etag");
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if ( lastModified ) {
jQuery.lastModified[url] = lastModified;
}
if ( etag ) {
jQuery.etag[url] = etag;
}
// Opera returns 0 when status is 304
return xhr.status === 304 || xhr.status === 0;
},
httpData: function( xhr, type, s ) {
var ct = xhr.getResponseHeader("content-type"),
xml = type === "xml" || !type && ct && ct.indexOf("xml") >= 0,
data = xml ? xhr.responseXML : xhr.responseText;
if ( xml && data.documentElement.nodeName === "parsererror" ) {
throw "parsererror";
}
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// Allow a pre-filtering function to sanitize the response
// s is checked to keep backwards compatibility
if ( s && s.dataFilter ) {
data = s.dataFilter( data, type );
}
// The filter can actually parse the response
if ( typeof data === "string" ) {
// If the type is "script", eval it in global context
if ( type === "script" ) {
jQuery.globalEval( data );
}
// Get the JavaScript object, if JSON is used.
if ( type === "json" ) {
if ( typeof JSON === "object" && JSON.parse ) {
data = JSON.parse( data );
} else {
data = (new Function("return " + data))();
}
}
}
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return data;
},
// Serialize an array of form elements or a set of
// key/values into a query string
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param: function( a ) {
var s = [];
function add( key, value ){
s[ s.length ] = encodeURIComponent(key) + '=' + encodeURIComponent(value);
}
// If an array was passed in, assume that it is an array
// of form elements
if ( jQuery.isArray(a) || a.jquery ) {
// Serialize the form elements
jQuery.each( a, function() {
add( this.name, this.value );
});
} else {
// Recursively encode parameters from object,
// building a prefix path as we go down
function buildParams(obj, prefix)
{
if ( jQuery.isArray(obj) ) {
for ( var i = 0, length = obj.length; i < length; i++ ) {
buildParams( obj[i], prefix );
};
} else if( typeof(obj) == "object" ) {
for ( var j in obj ) {
var postfix = ((j.indexOf("[]") > 0) ? "[]" : ""); // move any brackets to the end
buildParams(obj[j], (prefix ? (prefix+"["+j.replace("[]", "")+"]"+postfix) : j) );
}
} else {
add( prefix, jQuery.isFunction(obj) ? obj() : obj );
}
}
buildParams(a);
}
// Return the resulting serialization
return s.join("&").replace(r20, "+");
}
});