The server committed an HTTP protocol violation

[Dan W.]

Does anyone have any experience with this problem. I am trying to post
about 20 fields of information to another server using
System.Net.WebClient.UploadData. This works fine for some servers but one
in particular is causing the exception "The underlying connection was
closed: The server committed an HTTP protocol violation" to be thrown.

I found a post that said to add a config file with the following....

<configuration>
<system.net>
<settings>
<httpWebRequest useUnsafeHeaderParsing="true" />
</settings>
</system.net>
</configuration>

When I try this, I instead get the exception "An exception occurred during a
WebClient request.". Any ideas?

Thanks,

Dan W.

[Dino Chiesa [Microsoft]]

I had this problem, not with webservices or upload, but with a
HttpWebRequest , which is probably at the same layer.

One possible cause is that the server says that it does HTTP 1.1, but it
really does not. So, setting your client-side to HTTP 1.0 might avoid the
problem.
http://msdn.microsoft.com/library/en...mbersTopic.asp

BUT! How do you get access to the underlying HttpVersion from a SOAP
request? Add this code to your generated web reference file (C#):

protected override WebRequest GetWebRequest(Uri uri)
{
HttpWebRequest webRequest = (HttpWebRequest)
base.GetWebRequest(uri);

webRequest.KeepAlive = false;
webRequest.ProtocolVersion=HttpVersion.Version10; //
return webRequest;
}

Another possible approach is to just ignore the protocol error. Be careful,
This may or may not result in a correctly functioning app. But, In one case
I had, the protocol error was benign for my purposes.

"Dan W." <dw*******@eadmail.com> wrote in message
news:un****************@TK2MSFTNGP11.phx.gbl...

Does anyone have any experience with this problem. I am trying to post
about 20 fields of information to another server using
System.Net.WebClient.UploadData. This works fine for some servers but one
in particular is causing the exception "The underlying connection was
closed: The server committed an HTTP protocol violation" to be thrown.

I found a post that said to add a config file with the following....

<configuration>
<system.net>
<settings>
<httpWebRequest useUnsafeHeaderParsing="true" />
</settings>
</system.net>
</configuration>

When I try this, I instead get the exception "An exception occurred during
a
WebClient request.". Any ideas?

Thanks,

Dan W.