Re: curl 8.10.0 regression breaks uploads with HTTP/2 and http.postbuffer

From: Daniel Stenberg <daniel@haxx.se>
Date: Sep 13, 2024, 07:49 UTC
Message-ID: <565691o1-3451-o06o-2594-2750r90nqq6p@unkk.fr>
In-Reply-To: <ZuPdfsbHwjQPDPXc@pks.im>

On Fri, 13 Sep 2024, Patrick Steinhardt wrote:

> In a nutshell:

Thanks, this is helpful.

>  - We then clone a repository from Apache with http.postbuffer=65536,
>    which makes us use a small buffer when POSTing data via curl. We
>    typically use 1MB buffers, and when changing it back to 1MB instead
>    of 65kB the test works just fine.

Is this a git buffer size or is this a value you tell libcurl in an option to set a buffer size?

> I've appended two curl traces, the working one with 1MB buffers and the 
> failing one with 65kB buffers. I hope that helps.

How are you feeding the data to libcurl? (callback or by setting the postfields option?) I noticed that in the working case log, the POST requests always have a content-length header while the failing case log shows that header lacking in the final POST request.

Is that on purpose?

libcurl should still handle it fine, it might just be a clue for me to narrow down my search.

-- 
  / daniel.haxx.se