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From Oleg Kalnichevski <ol...@apache.org>
Subject Re: Using NTLM auth with expect continue
Date Wed, 09 Apr 2008 17:22:53 GMT

On Tue, 2008-04-08 at 18:53 -0400, Tony Thompson wrote:
> I am using HTTPClient 3.1.  I have an application that does NTLM
> authentication.  I am posting data with the HTTPClient using a stream
> that is not buffered.  If the web server requires an NTLM handshake, I
> get an "unbuffered entity enclosing request" exception (makes sense).
> So, after searching the mailing list archives, I thought I could use
> "Expect: continue" so the NTLM negotiation could happen before my
> content was posted.  It does not appear to work properly.  On a
> connection that has already been authenticated (i.e. I don't need to
> authenticate the POST request), the conversation looks like this:
>  
> POST request (headers only) --> server
> client <-- HTTP 100
> POST content --> server
> client <-- HTTP 200
>  
> So, if you can make sense of that, it appears the server (IIS 6.0) will
> deal with expect continue correctly.  So, if the connection needs to be
> authenticated, here is what happens:
>  
> POST request (headers only) --> server
> client <-- HTTP 401
> POST content (content is junk) --> server
> client <-- HTTP 400
>  
> I am not sure why content is posted in response to a 401.  Also, the
> content that is posted is the request headers that were sent in step #1
> not the actual content (that is why I said it was junk above).
>  
> Any idea why this might be happening?  I can't buffer the content
> without causing major issues with my application so the expect continue
> solution sounds perfect, if it can be made to work.
>  

Tony,

Please post a wire/context log of that session. I'll try to find time to
take a look

http://hc.apache.org/httpclient-3.x/logging.html

Oleg



> Thanks
> Tony
>  
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