Bugs item #2203193, was opened at 2008-10-28 07:54
Message generated for change (Settings changed) made by bagder
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Category: http
Group: wrong content
Status: Open
Resolution: None
>Priority: 6
Private: No
Submitted By: Yossi Nakash (yossinakash)
Assigned to: Daniel Stenberg (bagder)
Summary: NTLM authentication and POST wrong behavior

Initial Comment:
Hi,

I found a wrong behavior in CURL.
My libcurl version is 7.18.2.
My OS is Windows XP, the server I'm testing is windows 2003, and the server is IIS 6.

The wrong behavior I get:
Wnen I do POST with NTLM Authentication, I get 400 Bad request.

I used WireShark to viw the traffic and I saw the following:
1. POST is performed with "Content-Length: 214" + data.
2. Response 401.
3. POST is performed with "Content-Length: 214" with no data !!
4. Response 401.
5. POST is performed with "Content-Length: 214" + data.
6. Response 400 Bad Request.

I would expect the POST in paragraph 3 to send either "Content-Length: 0", or attach the data.

I'm not familiar with CURL too much, so I briefly did the following change to fix the issue:
I commented the following code, in http.c in line 2661:
  case HTTPREQ_POST:
/* my comment
    if(conn->bits.authneg)
      postsize = 0;
    else
*/

This fix did the trick to solve the issue.

I hope that you'll supply a better fix than that.
I don't have an open site for it, so I can't attach a link.
I work in RadView, and I had a similar issue in the past, I worked then with Daniel Stenberg.

Regards,
Yossi

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Comment By: Daniel Stenberg (bagder)
Date: 2008-10-29 00:35

Message:
First, this approach has been proven to work numerous times in the past so
it's a bit strange that you get a problem with it all of a sudden. If step
3 is the bad one, why don't you get the error until after step 5?

I don't see how that code _doesn't_ send "Content-Lenth: 0" at step 3. Can
you see why/how?

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You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=100976&aid=2203193&group_id=976
Received on 2008-10-29