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POHow does a web service server process a URL? (And some reflection about URL in WCF)
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  1. POHow does a web service server process a URL? (And some reflection about URL in WCF)
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    copied!<p>I am new to WCF. One of the <strong><em>uncomfortable</em></strong> thing that I encountered is to use an URL (endpoint) to represent a method (web service), and use HTTP to invoke it.</p> <p>An endpoint is composed of <strong>ABC</strong> - <em>Address, Binding, Contract</em> (i.e. interface). And it looks like this:</p> <pre><code>http://www.myserver.com/myservice.svc </code></pre> <p>I usually put URL like this in the web browser and expect some page comes back.</p> <p>The URL above I sent to the server is merely one of the many strings I sent with HTTP GET method. How exactly does the web service server locate a proper method with that URL string? I think the server should just do the following steps:</p> <p>1 - Do some trivial parsing against the URL string, then the server will know the Binding protocol and Address, (this is the <strong>A</strong> and <strong>B</strong> part of the aforementioned <strong>ABC</strong>).</p> <p>2 - Then, the <em>service host process</em> check the config file (be it app.config or web.config) and locate the target <em>service type</em>.</p> <p>3 - The <em>service host process</em> (be it a console application, WinForm application, or a IIS worker process) should already load the <em>service type</em> into its address space. With the service type info found in step 2, it could use reflection to invoke proper method. ( But I am not sure how does the client send "<em>which-method-of-the-service-type-I-want-to-invoke</em>" info to the server. After all, we could only locate the service type info through an endpoint ). </p> <p>So, from the above perspective, the URL is just an identification symbol, just like URL is used as <strong><em>xmlns</em></strong> attribute value. </p> <p>Is the above understanding right?</p> <p>Thanks for your answer.</p>
 

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