On Wed, 12 Jun 2024, Ali Nasir via curl-library wrote:
I have a question about the HTTP headers. The use case is a file transfer using multipart form data. We have a custom header to send. For example Shoe-Size: 10. When we set this header using: list = curl_slist_append(list, "Shoesize: 10"); curl_easy_setopt(curl, CURLOPT_HTTPHEADER, list); then i notice that the libcurl does not set the Content-Type and Content-Length: headers.
This does not match the intended, tested or documented behavior. Easily verified with this: curl -H "Shoesize: 10" -d moo -v localhost ... sends both Content-Length and Content-Type correctly.
If we set some custom header, why does libcurl remove the content headers?
If you can give us a small stand-alone example reproducing this, maybe we can figure out what's going on!
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