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/*
Copyright (c) 2004-2011, The Dojo Foundation All Rights Reserved.
Available via Academic Free License >= 2.1 OR the modified BSD license.
see: http://dojotoolkit.org/license for details
*/
dojo._xdResourceLoaded(function(dojo, dijit, dojox){
return {depends: [["provide", "dojox.rpc.Client"]],
defineResource: function(dojo, dijit, dojox){if(!dojo._hasResource["dojox.rpc.Client"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojox.rpc.Client"] = true;
dojo.provide("dojox.rpc.Client");
// Provide extra headers for robust client and server communication
(function() {
dojo._defaultXhr = dojo.xhr;
dojo.xhr = function(method,args){
var headers = args.headers = args.headers || {};
// set the client id, this can be used by servers to maintain state information with the
// a specific client. Many servers rely on sessions for this, but sessions are shared
// between tabs/windows, so this is not appropriate for application state, it
// really only useful for storing user authentication
headers["Client-Id"] = dojox.rpc.Client.clientId;
// set the sequence id. HTTP is non-deterministic, message can arrive at the server
// out of order. In complex Ajax applications, it may be more to ensure that messages
// can be properly sequenced deterministically. This applies a sequency id to each
// XHR request so that the server can order them.
headers["Seq-Id"] = dojox._reqSeqId = (dojox._reqSeqId||0)+1;
return dojo._defaultXhr.apply(dojo,arguments);
}
})();
// initiate the client id to a good random number
dojox.rpc.Client.clientId = (Math.random() + '').substring(2,14) + (new Date().getTime() + '').substring(8,13);
}
}};});
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