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2.75 kBJavaScriptView Raw
1define( [
2 "../core",
3 "../var/isFunction",
4 "./var/nonce",
5 "./var/rquery",
6 "../ajax"
7], function( jQuery, isFunction, nonce, rquery ) {
8
9"use strict";
10
11var oldCallbacks = [],
12 rjsonp = /(=)\?(?=&|$)|\?\?/;
13
14// Default jsonp settings
15jQuery.ajaxSetup( {
16 jsonp: "callback",
17 jsonpCallback: function() {
18 var callback = oldCallbacks.pop() || ( jQuery.expando + "_" + ( nonce.guid++ ) );
19 this[ callback ] = true;
20 return callback;
21 }
22} );
23
24// Detect, normalize options and install callbacks for jsonp requests
25jQuery.ajaxPrefilter( "json jsonp", function( s, originalSettings, jqXHR ) {
26
27 var callbackName, overwritten, responseContainer,
28 jsonProp = s.jsonp !== false && ( rjsonp.test( s.url ) ?
29 "url" :
30 typeof s.data === "string" &&
31 ( s.contentType || "" )
32 .indexOf( "application/x-www-form-urlencoded" ) === 0 &&
33 rjsonp.test( s.data ) && "data"
34 );
35
36 // Handle iff the expected data type is "jsonp" or we have a parameter to set
37 if ( jsonProp || s.dataTypes[ 0 ] === "jsonp" ) {
38
39 // Get callback name, remembering preexisting value associated with it
40 callbackName = s.jsonpCallback = isFunction( s.jsonpCallback ) ?
41 s.jsonpCallback() :
42 s.jsonpCallback;
43
44 // Insert callback into url or form data
45 if ( jsonProp ) {
46 s[ jsonProp ] = s[ jsonProp ].replace( rjsonp, "$1" + callbackName );
47 } else if ( s.jsonp !== false ) {
48 s.url += ( rquery.test( s.url ) ? "&" : "?" ) + s.jsonp + "=" + callbackName;
49 }
50
51 // Use data converter to retrieve json after script execution
52 s.converters[ "script json" ] = function() {
53 if ( !responseContainer ) {
54 jQuery.error( callbackName + " was not called" );
55 }
56 return responseContainer[ 0 ];
57 };
58
59 // Force json dataType
60 s.dataTypes[ 0 ] = "json";
61
62 // Install callback
63 overwritten = window[ callbackName ];
64 window[ callbackName ] = function() {
65 responseContainer = arguments;
66 };
67
68 // Clean-up function (fires after converters)
69 jqXHR.always( function() {
70
71 // If previous value didn't exist - remove it
72 if ( overwritten === undefined ) {
73 jQuery( window ).removeProp( callbackName );
74
75 // Otherwise restore preexisting value
76 } else {
77 window[ callbackName ] = overwritten;
78 }
79
80 // Save back as free
81 if ( s[ callbackName ] ) {
82
83 // Make sure that re-using the options doesn't screw things around
84 s.jsonpCallback = originalSettings.jsonpCallback;
85
86 // Save the callback name for future use
87 oldCallbacks.push( callbackName );
88 }
89
90 // Call if it was a function and we have a response
91 if ( responseContainer && isFunction( overwritten ) ) {
92 overwritten( responseContainer[ 0 ] );
93 }
94
95 responseContainer = overwritten = undefined;
96 } );
97
98 // Delegate to script
99 return "script";
100 }
101} );
102
103} );