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POIIS7 Application Request Routing (arr reverse proxy) combined with managed module - time out
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  1. POIIS7 Application Request Routing (arr reverse proxy) combined with managed module - time out
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    copied!<p>I am trying to build a proxy that would serve requests to an internal site (hiding the origin) but at the same time inspect the packets and asynchronously post-process them.</p> <p>E.g. let's say all SOAP calls to <a href="http://www.foo.com" rel="noreferrer">http://www.foo.com</a> will go to <a href="http://192.168.1.1" rel="noreferrer">http://192.168.1.1</a>, and at the same time be stored in a DB for post analysis. The internal server is a black box, so changing something on it is out of this question scope.</p> <p>Anyway, I have configured ARR, with reverse proxy, made URL rewrite filter with wildcards, all works flawless. Then, I tried to add an managed HttpModule written in C#, and hooked to Application_BeginRequest and Application_EndRequest. I am able to access request headers, response headers on end request (app pool being in integrated mode) and even able to read response content from the outputstream by setting a filter on Response.Filter, that caches all writes in an additional memory stream.</p> <p>The problem is that the moment I try to read (inside the module BeginRequest handler) the input stream from the request, ARR stays a while and throws a </p> <blockquote> <p>HTTP Error 502.3 - Bad Gateway The operation timed out Handler ApplicationRequestRoutingHandler Error Code 0x80072ee2</p> </blockquote> <p>So it times out.</p> <p>Looking with Failed Request Tracing I see:</p> <blockquote> <p>MODULE_SET_RESPONSE_ERROR_STATUS Warning ModuleName="ApplicationRequestRouting", Notification="EXECUTE_REQUEST_HANDLER", HttpStatus="502", HttpReason="Bad Gateway", HttpSubStatus="3", ErrorCode="2147954402", ConfigExceptionInfo="" SET_RESPONSE_ERROR_DESCRIPTION Warning ErrorDescription="The operation timed out"</p> </blockquote> <p>Now any similar posts on the net didn't helped as this isn't a timeout error (proxy has 120 seconds setting, page answers in under 100 ms), and the moment I comment the code of the handler that tries to read FORM data or InputStream data, everything works as a charm.</p> <p>Even if I set the position of the inputstream to 0 after reading it, I still get timeouts. If I read the input stream on EndRequest, it gets 0 bytes, even if it was a POST request. (which is clearly wrong)</p> <p>Does ARR has a bug in the fact that I try to read an input stream before it tries to re-route it?</p> <blockquote> <p>Things used: Windows Server 2008 R2 IIS 7.5 ARR v2 .Net Framework 3.5 module</p> </blockquote> <p>Ideas? Thanks /Cosmin</p>
 

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