137 lines
3.4 KiB
JavaScript
137 lines
3.4 KiB
JavaScript
define([
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"../core",
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"../var/support",
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"../ajax"
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], function( jQuery, support ) {
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jQuery.ajaxSettings.xhr = function() {
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try {
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return new XMLHttpRequest();
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} catch( e ) {}
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};
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var xhrId = 0,
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xhrCallbacks = {},
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xhrSuccessStatus = {
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// file protocol always yields status code 0, assume 200
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0: 200,
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// Support: IE9
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// #1450: sometimes IE returns 1223 when it should be 204
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1223: 204
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},
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xhrSupported = jQuery.ajaxSettings.xhr();
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// Support: IE9
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// Open requests must be manually aborted on unload (#5280)
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// See https://support.microsoft.com/kb/2856746 for more info
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if ( window.attachEvent ) {
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window.attachEvent( "onunload", function() {
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for ( var key in xhrCallbacks ) {
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xhrCallbacks[ key ]();
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}
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});
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}
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support.cors = !!xhrSupported && ( "withCredentials" in xhrSupported );
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support.ajax = xhrSupported = !!xhrSupported;
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jQuery.ajaxTransport(function( options ) {
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var callback;
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// Cross domain only allowed if supported through XMLHttpRequest
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if ( support.cors || xhrSupported && !options.crossDomain ) {
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return {
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send: function( headers, complete ) {
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var i,
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xhr = options.xhr(),
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id = ++xhrId;
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xhr.open( options.type, options.url, options.async, options.username, options.password );
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// Apply custom fields if provided
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if ( options.xhrFields ) {
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for ( i in options.xhrFields ) {
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xhr[ i ] = options.xhrFields[ i ];
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}
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}
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// Override mime type if needed
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if ( options.mimeType && xhr.overrideMimeType ) {
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xhr.overrideMimeType( options.mimeType );
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}
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// X-Requested-With header
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// For cross-domain requests, seeing as conditions for a preflight are
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// akin to a jigsaw puzzle, we simply never set it to be sure.
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// (it can always be set on a per-request basis or even using ajaxSetup)
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// For same-domain requests, won't change header if already provided.
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if ( !options.crossDomain && !headers["X-Requested-With"] ) {
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headers["X-Requested-With"] = "XMLHttpRequest";
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}
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// Set headers
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for ( i in headers ) {
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xhr.setRequestHeader( i, headers[ i ] );
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}
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// Callback
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callback = function( type ) {
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return function() {
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if ( callback ) {
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delete xhrCallbacks[ id ];
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callback = xhr.onload = xhr.onerror = null;
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if ( type === "abort" ) {
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xhr.abort();
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} else if ( type === "error" ) {
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complete(
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// file: protocol always yields status 0; see #8605, #14207
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xhr.status,
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xhr.statusText
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);
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} else {
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complete(
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xhrSuccessStatus[ xhr.status ] || xhr.status,
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xhr.statusText,
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// Support: IE9
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// Accessing binary-data responseText throws an exception
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// (#11426)
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typeof xhr.responseText === "string" ? {
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text: xhr.responseText
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} : undefined,
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xhr.getAllResponseHeaders()
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);
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}
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}
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};
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};
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// Listen to events
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xhr.onload = callback();
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xhr.onerror = callback("error");
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// Create the abort callback
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callback = xhrCallbacks[ id ] = callback("abort");
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try {
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// Do send the request (this may raise an exception)
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xhr.send( options.hasContent && options.data || null );
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} catch ( e ) {
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// #14683: Only rethrow if this hasn't been notified as an error yet
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if ( callback ) {
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throw e;
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}
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}
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},
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abort: function() {
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if ( callback ) {
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callback();
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}
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}
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};
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}
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});
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});
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