Matteo Scandolo | 280dcd3 | 2016-05-16 09:59:38 -0700 | [diff] [blame] | 1 | define([ |
| 2 | "../core", |
| 3 | "../var/support", |
| 4 | "../ajax" |
| 5 | ], function( jQuery, support ) { |
| 6 | |
| 7 | jQuery.ajaxSettings.xhr = function() { |
| 8 | try { |
| 9 | return new XMLHttpRequest(); |
| 10 | } catch( e ) {} |
| 11 | }; |
| 12 | |
| 13 | var xhrId = 0, |
| 14 | xhrCallbacks = {}, |
| 15 | xhrSuccessStatus = { |
| 16 | // file protocol always yields status code 0, assume 200 |
| 17 | 0: 200, |
| 18 | // Support: IE9 |
| 19 | // #1450: sometimes IE returns 1223 when it should be 204 |
| 20 | 1223: 204 |
| 21 | }, |
| 22 | xhrSupported = jQuery.ajaxSettings.xhr(); |
| 23 | |
| 24 | // Support: IE9 |
| 25 | // Open requests must be manually aborted on unload (#5280) |
| 26 | // See https://support.microsoft.com/kb/2856746 for more info |
| 27 | if ( window.attachEvent ) { |
| 28 | window.attachEvent( "onunload", function() { |
| 29 | for ( var key in xhrCallbacks ) { |
| 30 | xhrCallbacks[ key ](); |
| 31 | } |
| 32 | }); |
| 33 | } |
| 34 | |
| 35 | support.cors = !!xhrSupported && ( "withCredentials" in xhrSupported ); |
| 36 | support.ajax = xhrSupported = !!xhrSupported; |
| 37 | |
| 38 | jQuery.ajaxTransport(function( options ) { |
| 39 | var callback; |
| 40 | |
| 41 | // Cross domain only allowed if supported through XMLHttpRequest |
| 42 | if ( support.cors || xhrSupported && !options.crossDomain ) { |
| 43 | return { |
| 44 | send: function( headers, complete ) { |
| 45 | var i, |
| 46 | xhr = options.xhr(), |
| 47 | id = ++xhrId; |
| 48 | |
| 49 | xhr.open( options.type, options.url, options.async, options.username, options.password ); |
| 50 | |
| 51 | // Apply custom fields if provided |
| 52 | if ( options.xhrFields ) { |
| 53 | for ( i in options.xhrFields ) { |
| 54 | xhr[ i ] = options.xhrFields[ i ]; |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | // Override mime type if needed |
| 59 | if ( options.mimeType && xhr.overrideMimeType ) { |
| 60 | xhr.overrideMimeType( options.mimeType ); |
| 61 | } |
| 62 | |
| 63 | // X-Requested-With header |
| 64 | // For cross-domain requests, seeing as conditions for a preflight are |
| 65 | // akin to a jigsaw puzzle, we simply never set it to be sure. |
| 66 | // (it can always be set on a per-request basis or even using ajaxSetup) |
| 67 | // For same-domain requests, won't change header if already provided. |
| 68 | if ( !options.crossDomain && !headers["X-Requested-With"] ) { |
| 69 | headers["X-Requested-With"] = "XMLHttpRequest"; |
| 70 | } |
| 71 | |
| 72 | // Set headers |
| 73 | for ( i in headers ) { |
| 74 | xhr.setRequestHeader( i, headers[ i ] ); |
| 75 | } |
| 76 | |
| 77 | // Callback |
| 78 | callback = function( type ) { |
| 79 | return function() { |
| 80 | if ( callback ) { |
| 81 | delete xhrCallbacks[ id ]; |
| 82 | callback = xhr.onload = xhr.onerror = null; |
| 83 | |
| 84 | if ( type === "abort" ) { |
| 85 | xhr.abort(); |
| 86 | } else if ( type === "error" ) { |
| 87 | complete( |
| 88 | // file: protocol always yields status 0; see #8605, #14207 |
| 89 | xhr.status, |
| 90 | xhr.statusText |
| 91 | ); |
| 92 | } else { |
| 93 | complete( |
| 94 | xhrSuccessStatus[ xhr.status ] || xhr.status, |
| 95 | xhr.statusText, |
| 96 | // Support: IE9 |
| 97 | // Accessing binary-data responseText throws an exception |
| 98 | // (#11426) |
| 99 | typeof xhr.responseText === "string" ? { |
| 100 | text: xhr.responseText |
| 101 | } : undefined, |
| 102 | xhr.getAllResponseHeaders() |
| 103 | ); |
| 104 | } |
| 105 | } |
| 106 | }; |
| 107 | }; |
| 108 | |
| 109 | // Listen to events |
| 110 | xhr.onload = callback(); |
| 111 | xhr.onerror = callback("error"); |
| 112 | |
| 113 | // Create the abort callback |
| 114 | callback = xhrCallbacks[ id ] = callback("abort"); |
| 115 | |
| 116 | try { |
| 117 | // Do send the request (this may raise an exception) |
| 118 | xhr.send( options.hasContent && options.data || null ); |
| 119 | } catch ( e ) { |
| 120 | // #14683: Only rethrow if this hasn't been notified as an error yet |
| 121 | if ( callback ) { |
| 122 | throw e; |
| 123 | } |
| 124 | } |
| 125 | }, |
| 126 | |
| 127 | abort: function() { |
| 128 | if ( callback ) { |
| 129 | callback(); |
| 130 | } |
| 131 | } |
| 132 | }; |
| 133 | } |
| 134 | }); |
| 135 | |
| 136 | }); |