source: Dev/trunk/src/client/dojox/io/xhrScriptPlugin.js

define(["dojo/_base/kernel", "dojo/_base/window", "dojo/io/script", "dojox/io/xhrPlugins", "dojox/io/scriptFrame"], function(dojo, window, script, xhrPlugins, scriptFrame){
dojo.getObject("io.xhrScriptPlugin", true, dojox);

dojox.io.xhrScriptPlugin = function(/*String*/url, /*String*/callbackParamName, /*Function?*/httpAdapter){
        // summary:
        //              Adds the script transport (JSONP) as an XHR plugin for the given site. See
        //              dojox.io.script for more information on the transport. Note, that JSONP
        //              is *not* a secure transport, by loading data from a third-party site using JSONP
        //              the site has full access to your JavaScript environment.
        // url:
        //              Url prefix of the site which can handle JSONP requests.
        // httpAdapter:
        //              This allows for adapting HTTP requests that could not otherwise be
        //              sent with JSONP, so you can use a convention for headers and PUT/DELETE methods.
        xhrPlugins.register(
                "script",
                function(method,args){
                         return args.sync !== true &&
                                (method == "GET" || httpAdapter) &&
                                (args.url.substring(0,url.length) == url);
                },
                function(method,args,hasBody){
                        var send = function(){
                                args.callbackParamName = callbackParamName;
                                if(dojo.body()){
                                        args.frameDoc = "frame" + Math.random();
                                }
                                return script.get(args);
                        };
                        return (httpAdapter ? httpAdapter(send, true) : send)(method, args, hasBody); // use the JSONP transport
                }
        );
};

return dojox.io.xhrScriptPlugin;
});