HTTP client: Fix empty streaming request body, omit Transfer-Encoding: chunked
#516
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This changeset fixes sending an outgoing streaming request body that is known to be empty. In this case, we do not want to send a
Content-Length: 0
orTransfer-Encoding: chunked
. Prior to this change, we would send aTransfer-Encoding: chunked
header without ever sending an end chunk, thus never signalling the end of the request body stream to the HTTP server. In other words, the updated version is now compliant with https://www.rfc-editor.org/rfc/rfc9112.html.Resolves #497