Hello! I have the following problem:
I want to perform an HTTP POST request, PUT request or another custom request (CURLOPT_CUSTOMREQUEST) with some data (CURLOPT_UPLOAD, CURLOPT_INFILESIZE_LARGE) with using NTLM authentication (CURLOPT_HTTPAUTH CURLAUTH_NTLM, CURLOPT_USERPWD). But the request fails with 411 Length required (Server: IIS 6.2), if this is the first request of a CURL-handle. Performing a GET request always works as expected. WireShark shows, that cURL removes the "Content-Length" header in the NTLM challenge request and therefore the Server complains about the missing header. Adding the "Content-Length" header additionally to the request does not help. If I add a "Content-Length-X"-Header, I can see in WireShark that this header survives, but the Content-Length header is missing. Adding a "Expect: 100-continue" header does not help either. Regarding to the change-logs this bug has been fixed in version 7.19.6 (https://curl.haxx.se/changes.html#7_19_6): Bugfixes: · ... · set Content-Length: with POST and PUT failed with NTLM auth · ... I have following discussion about this bug found: http://marc.info/?t=107172137000001&r=1&w=2 If I use cURL Library version 7.19.6 where this bug was initially fixed the problem disappears and the request works as expected. If I use cURL Library version 7.49.1 or the latest Version, 7.52.1, the request fails with 411 Length required as mentioned above. It seems some changes to cURL broke that. I did not test in which version the bug reappeared. Do you have any suggestions how to work around that problem? I want to use the latest cURL Library version for security reasons. I can perform a GET request on every newly created CURL handle first to perform the NTLM challenge and after that perform the POST request, but this may probably lead to performance problems; Besides I don't know the exact URL to which to perform this challenge Request. Regards, Dominik
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