help with httpRequest via ISA (proxy) server.

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help with httpRequest via ISA (proxy) server.

Hi, eveyone.

Here is the situation:

I have a .net client app that reads file(s) into a byte array and using HttpRequest object sends the data to a webservice that sits behind a proxy (ISA) server. It works OK if I do not use chunking in the request, but when chunking is turned on, I get the following error:< xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />


The ISA Server services cannot create a packet filter 216.109.126.70. < xml:namespace prefix = u1 />This event occurs when there is a conflict between the Local Address Table (LAT) configuration and the Windows 2000 routing table. Check the routing table and the LAT to find the source of the conflict.

Any ideas Any help is greatly appreciated.
G.




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help with httpRequest via ISA (proxy) server.

  • coldnebraskablue

    From my experience, many proxy servers do not support chunked requests.  I do not recognize this error, but I would just stay away from chunking when going through a proxy...

  • alvinr

    This could be a server misconfiguration.. it may not have anything to do with your httprequest. Try posting or searching for this at www.isaserver.org.

    I remember coming across this event a while back.


  • jk_uk2

    The error you are seein is not a normal HTTP exception. The error leads me to believe that
    there is a serious issue with the HTTP Proxy you are using. You might need to get hold of a sys admin

  • DaveQuick

    It is also important to note that under normal conditions HttpWebRequest will usually receive a 400 bad request from the proxy server if the proxy doesn't support chunking.  In v1.1 and v2.0 of the .net framework, HttpWebRequest will then auto-resubmit the request as a content-length request if you have the HttpWebRequest.AllowWriteStreamBuffering set to true (the default behavior).  I am not sure whether or not v1.0 supports this auto recovery mechanism but I can find out if you need me to.

  • Vince Stone

    Very good idea, except I need to chunk the file before sending since a lot of the files could be large in size...Thanks anyway.

  • help with httpRequest via ISA (proxy) server.
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