1 files changed, 29 insertions, 0 deletions
diff --git a/js/dojo/dojox/rpc/Client.js b/js/dojo/dojox/rpc/Client.js
new file mode 100644
index 0000000..2da1981
--- /dev/null
+++ b/js/dojo/dojox/rpc/Client.js
@@ -0,0 +1,29 @@
+//>>built
+define("dojox/rpc/Client", ["dojo", "dojox"], function(dojo, dojox) {
+
+	dojo.getObject("rpc.Client", true, dojox);
+
+	// Provide extra headers for robust client and server communication
+
+	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);
+
+	return dojox.rpc.Client;
+
+});