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28 lines
1.3 KiB
28 lines
1.3 KiB
define("dojox/rpc/Client", ["dojo", "dojox"], function(dojo, dojox) { |
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dojo.getObject("rpc.Client", true, dojox); |
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// Provide extra headers for robust client and server communication |
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dojo._defaultXhr = dojo.xhr; |
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dojo.xhr = function(method,args){ |
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var headers = args.headers = args.headers || {}; |
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// set the client id, this can be used by servers to maintain state information with the |
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// a specific client. Many servers rely on sessions for this, but sessions are shared |
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// between tabs/windows, so this is not appropriate for application state, it |
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// really only useful for storing user authentication |
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headers["Client-Id"] = dojox.rpc.Client.clientId; |
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// set the sequence id. HTTP is non-deterministic, message can arrive at the server |
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// out of order. In complex Ajax applications, it may be more to ensure that messages |
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// can be properly sequenced deterministically. This applies a sequency id to each |
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// XHR request so that the server can order them. |
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headers["Seq-Id"] = dojox._reqSeqId = (dojox._reqSeqId||0)+1; |
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return dojo._defaultXhr.apply(dojo,arguments); |
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} |
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// initiate the client id to a good random number |
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dojox.rpc.Client.clientId = (Math.random() + '').substring(2,14) + (new Date().getTime() + '').substring(8,13); |
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return dojox.rpc.Client; |
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});
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