libcurl: use chunked Transfer-Encoding for HTTP_POST if size unknown #4138
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If using the read callback for HTTP_POST, and POSTFIELDSIZE is not set, automatically add a Transfer-Encoding: chunked header, same as it is already done for HTTP_PUT, HTTP_POST_FORM and HTTP_POST_MIME. Update test 1514 according to the new behaviour.
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I think it makes sense to unify the behavior like this. Is there any docs that need updating after this fix? |
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Yes, the doc of CURLOPT_POST has to be updated. |
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will you make that change as well as part of this PR? |
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Thanks! I updated the docs slightly before I pushed. |
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Thanks, and sorry for not responding, I was away for the weekend. |
mkauf
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Oct 25, 2019
libcurl 7.66.0 automatically adds a "Transfer-Encoding: chunked" header if the content length is not known to libcurl, because of this change: curl/curl#4138 libcurl does not parse custom "Content-Length" headers, it needs the content length using the options CURLOPT_POSTFIELDSIZE(_LARGE) and CURLOPT_INFILESIZE(_LARGE). The "Boulder" server rejects requests with both headers, but the host acme-v02.api.letsencrypt.org accepts such requests, probably because there's a reverse proxy.
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If using the read callback for HTTP_POST, and POSTFIELDSIZE is not set,
automatically add a Transfer-Encoding: chunked header, same as it is
already done for HTTP_PUT, HTTP_POST_FORM and HTTP_POST_MIME.
Update test 1514 according to the new behaviour.