Sending compressed HTTP requests to Apache server:Content-Length I

[PerryG]

We have a .NET 1.1 client which is sending a gzipped soap request using
HttpWebRequest to an Apache server. The Apache server is using a the
'mod_deflate' server to decompress the incoming message, and to also compress
the response (GZIP).

The mod_deflate filter requires the 'Content-Length' header contained within
the incoming request to specify the number of UNCOMPRESSED bytes being sent
and not the actual bytes of the body of the compressed HTTP request itself.
The problem we have is .NET requires that you specify the number of actual
bytes written to the request stream as specified in the Content-Length header
of the request message. The exception we receive when attempting to close
the stream to send the request is:

[System.IO.IOExc eption]: {System.IO.IOEx ception}
HelpLink: Nothing
InnerException: Nothing
Message: "Cannot close stream until all bytes are written."
Source: "System"
StackTrace: " at System.Net.Conn ectStream.Close Internal(Boolea n
internalCall, Boolean ignoreShutDownC heck)"
TargetSite: {System.Reflect ion.RuntimeMeth odInfo}

Is there any way around this issue?

[PerryG]

I was able to come up with an 'ugly' workaround for now. I can ignore the
below raised error, reset the content length to the compressed length, and
continue processing. Doing this will send the content-length of the
uncompressed message, but still allow me to write to the stream, send the
request, and receive the response. If anyone has a better suggestion I'd
still love to hear it.

Thanks

"PerryG" wrote:

We have a .NET 1.1 client which is sending a gzipped soap request using
HttpWebRequest to an Apache server. The Apache server is using a the
'mod_deflate' server to decompress the incoming message, and to also compress
the response (GZIP).

The mod_deflate filter requires the 'Content-Length' header contained within
the incoming request to specify the number of UNCOMPRESSED bytes being sent
and not the actual bytes of the body of the compressed HTTP request itself.
The problem we have is .NET requires that you specify the number of actual
bytes written to the request stream as specified in the Content-Length header
of the request message. The exception we receive when attempting to close
the stream to send the request is:

[System.IO.IOExc eption]: {System.IO.IOEx ception}
HelpLink: Nothing
InnerException: Nothing
Message: "Cannot close stream until all bytes are written."
Source: "System"
StackTrace: " at System.Net.Conn ectStream.Close Internal(Boolea n
internalCall, Boolean ignoreShutDownC heck)"
TargetSite: {System.Reflect ion.RuntimeMeth odInfo}

Is there any way around this issue?