/public/phpmyadmin/js/jquery/src/jquery/ajax/xhr.js
JavaScript | 196 lines | 111 code | 30 blank | 55 comment | 35 complexity | 6640ee85cecf8fddfb2cf74998f8acb1 MD5 | raw file
- define([
- "../core",
- "../var/support",
- "../ajax"
- ], function( jQuery, support ) {
- // Create the request object
- // (This is still attached to ajaxSettings for backward compatibility)
- jQuery.ajaxSettings.xhr = window.ActiveXObject !== undefined ?
- // Support: IE6+
- function() {
- // XHR cannot access local files, always use ActiveX for that case
- return !this.isLocal &&
- // Support: IE7-8
- // oldIE XHR does not support non-RFC2616 methods (#13240)
- // See http://msdn.microsoft.com/en-us/library/ie/ms536648(v=vs.85).aspx
- // and http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9
- // Although this check for six methods instead of eight
- // since IE also does not support "trace" and "connect"
- /^(get|post|head|put|delete|options)$/i.test( this.type ) &&
- createStandardXHR() || createActiveXHR();
- } :
- // For all other browsers, use the standard XMLHttpRequest object
- createStandardXHR;
- var xhrId = 0,
- xhrCallbacks = {},
- xhrSupported = jQuery.ajaxSettings.xhr();
- // Support: IE<10
- // Open requests must be manually aborted on unload (#5280)
- if ( window.ActiveXObject ) {
- jQuery( window ).on( "unload", function() {
- for ( var key in xhrCallbacks ) {
- xhrCallbacks[ key ]( undefined, true );
- }
- });
- }
- // Determine support properties
- support.cors = !!xhrSupported && ( "withCredentials" in xhrSupported );
- xhrSupported = support.ajax = !!xhrSupported;
- // Create transport if the browser can provide an xhr
- if ( xhrSupported ) {
- jQuery.ajaxTransport(function( options ) {
- // Cross domain only allowed if supported through XMLHttpRequest
- if ( !options.crossDomain || support.cors ) {
- var callback;
- return {
- send: function( headers, complete ) {
- var i,
- xhr = options.xhr(),
- id = ++xhrId;
- // Open the socket
- xhr.open( options.type, options.url, options.async, options.username, options.password );
- // Apply custom fields if provided
- if ( options.xhrFields ) {
- for ( i in options.xhrFields ) {
- xhr[ i ] = options.xhrFields[ i ];
- }
- }
- // Override mime type if needed
- if ( options.mimeType && xhr.overrideMimeType ) {
- xhr.overrideMimeType( options.mimeType );
- }
- // X-Requested-With header
- // For cross-domain requests, seeing as conditions for a preflight are
- // akin to a jigsaw puzzle, we simply never set it to be sure.
- // (it can always be set on a per-request basis or even using ajaxSetup)
- // For same-domain requests, won't change header if already provided.
- if ( !options.crossDomain && !headers["X-Requested-With"] ) {
- headers["X-Requested-With"] = "XMLHttpRequest";
- }
- // Set headers
- for ( i in headers ) {
- // Support: IE<9
- // IE's ActiveXObject throws a 'Type Mismatch' exception when setting
- // request header to a null-value.
- //
- // To keep consistent with other XHR implementations, cast the value
- // to string and ignore `undefined`.
- if ( headers[ i ] !== undefined ) {
- xhr.setRequestHeader( i, headers[ i ] + "" );
- }
- }
- // Do send the request
- // This may raise an exception which is actually
- // handled in jQuery.ajax (so no try/catch here)
- xhr.send( ( options.hasContent && options.data ) || null );
- // Listener
- callback = function( _, isAbort ) {
- var status, statusText, responses;
- // Was never called and is aborted or complete
- if ( callback && ( isAbort || xhr.readyState === 4 ) ) {
- // Clean up
- delete xhrCallbacks[ id ];
- callback = undefined;
- xhr.onreadystatechange = jQuery.noop;
- // Abort manually if needed
- if ( isAbort ) {
- if ( xhr.readyState !== 4 ) {
- xhr.abort();
- }
- } else {
- responses = {};
- status = xhr.status;
- // Support: IE<10
- // Accessing binary-data responseText throws an exception
- // (#11426)
- if ( typeof xhr.responseText === "string" ) {
- responses.text = xhr.responseText;
- }
- // Firefox throws an exception when accessing
- // statusText for faulty cross-domain requests
- try {
- statusText = xhr.statusText;
- } catch( e ) {
- // We normalize with Webkit giving an empty statusText
- statusText = "";
- }
- // Filter status for non standard behaviors
- // If the request is local and we have data: assume a success
- // (success with no data won't get notified, that's the best we
- // can do given current implementations)
- if ( !status && options.isLocal && !options.crossDomain ) {
- status = responses.text ? 200 : 404;
- // IE - #1450: sometimes returns 1223 when it should be 204
- } else if ( status === 1223 ) {
- status = 204;
- }
- }
- }
- // Call complete if needed
- if ( responses ) {
- complete( status, statusText, responses, xhr.getAllResponseHeaders() );
- }
- };
- if ( !options.async ) {
- // if we're in sync mode we fire the callback
- callback();
- } else if ( xhr.readyState === 4 ) {
- // (IE6 & IE7) if it's in cache and has been
- // retrieved directly we need to fire the callback
- setTimeout( callback );
- } else {
- // Add to the list of active xhr callbacks
- xhr.onreadystatechange = xhrCallbacks[ id ] = callback;
- }
- },
- abort: function() {
- if ( callback ) {
- callback( undefined, true );
- }
- }
- };
- }
- });
- }
- // Functions to create xhrs
- function createStandardXHR() {
- try {
- return new window.XMLHttpRequest();
- } catch( e ) {}
- }
- function createActiveXHR() {
- try {
- return new window.ActiveXObject( "Microsoft.XMLHTTP" );
- } catch( e ) {}
- }
- });