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(function( jQuery ) {
var jsc = jQuery.now(),
jsre = /(\=)\?(&|$)|()\?\?()/i;
// Default jsonp settings
jQuery.ajaxSetup({
jsonp: "callback",
jsonpCallback: function() {
return jQuery.expando + "_" + ( jsc++ );
}
});
// Detect, normalize options and install callbacks for jsonp requests
jQuery.ajaxPrefilter( "json jsonp", function( s, originalSettings, dataIsString /* internal */ ) {
dataIsString = ( typeof s.data === "string" );
if ( s.dataTypes[ 0 ] === "jsonp" ||
originalSettings.jsonpCallback ||
originalSettings.jsonp != null ||
s.jsonp !== false && ( jsre.test( s.url ) ||
dataIsString && jsre.test( s.data ) ) ) {
var responseContainer,
jsonpCallback = s.jsonpCallback =
jQuery.isFunction( s.jsonpCallback ) ? s.jsonpCallback() : s.jsonpCallback,
previous = window[ jsonpCallback ],
url = s.url,
data = s.data,
replace = "$1" + jsonpCallback + "$2";
if ( s.jsonp !== false ) {
url = url.replace( jsre, replace );
if ( s.url === url ) {
if ( dataIsString ) {
data = data.replace( jsre, replace );
}
if ( s.data === data ) {
// Add callback manually
url += (/\?/.test( url ) ? "&" : "?") + s.jsonp + "=" + jsonpCallback;
}
}
}
s.url = url;
s.data = data;
window[ jsonpCallback ] = function( response ) {
responseContainer = [ response ];
};
s.complete = [ function() {
// Set callback back to previous value
window[ jsonpCallback ] = previous;
// Call if it was a function and we have a response
if ( previous) {
if ( responseContainer && jQuery.isFunction( previous ) ) {
window[ jsonpCallback ] ( responseContainer[ 0 ] );
}
} else {
// else, more memory leak avoidance
try{
delete window[ jsonpCallback ];
} catch( e ) {}
}
}, s.complete ];
// Use data converter to retrieve json after script execution
s.converters["script json"] = function() {
if ( ! responseContainer ) {
jQuery.error( jsonpCallback + " was not called" );
}
return responseContainer[ 0 ];
};
// force json dataType
s.dataTypes[ 0 ] = "json";
// Delegate to script
return "script";
}
} );
})( jQuery );
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