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(function( jQuery ) {
var jsc = jQuery.now(),
jsre = /(\=)(?:\?|%3F)(&|$)|()(?:\?\?|%3F%3F)()/i,
rquery_jsonp = /\?/;
// Default jsonp settings
jQuery.ajaxSetup({
jsonp: "callback",
jsonpCallback: function() {
return "jsonp" + jsc++;
}
});
// Normalize jsonp queries
// 1) put callback parameter in url or data
// 2) sneakily ensure transportDataType is always jsonp for jsonp requests
jQuery.ajax.prefilter("json jsonp", function(s, originalSettings) {
if ( s.dataTypes[ 0 ] === "jsonp" ||
originalSettings.jsonp ||
originalSettings.jsonpCallback ||
jsre.test(s.url) ||
typeof(s.data) === "string" && jsre.test(s.data) ) {
var jsonpCallback = s.jsonpCallback =
jQuery.isFunction( s.jsonpCallback ) ? s.jsonpCallback() : s.jsonpCallback,
url = s.url.replace(jsre, "$1" + jsonpCallback + "$2"),
data = s.url === url && typeof(s.data) === "string" ? s.data.replace(jsre, "$1" + jsonpCallback + "$2") : s.data;
if ( url === s.url && data === s.data ) {
url += (rquery_jsonp.test( url ) ? "&" : "?") + s.jsonp + "=" + jsonpCallback;
}
s.url = url;
s.data = data;
s.dataTypes[ 0 ] = "jsonp";
}
// Bind transport to jsonp dataType
}).transport("jsonp", function(s) {
// Put callback in place
var responseContainer,
jsonpCallback = s.jsonpCallback,
previous = window[ jsonpCallback ];
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 ];
// Sneakily ensure this will be handled as json
s.dataTypes[ 0 ] = "json";
// 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 ];
};
// Delegate to script transport
return "script";
});
})( jQuery );
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