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