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http.lua: set transfer-encoding if source and no content-length

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If a source is specified without a content-length header, LuaSocket
sends the data in the chunked transfer coding; however, it doesn't set
the transfer-encoding header.  While I recognize that the user can set
this manually, this is a gotcha that has caught me multiple times.

RFC7230, section 3.3.3
  (https://tools.ietf.org/html/rfc7230#section-3.3.3)
is clear about this; if neither content-length nor transfer-encoding
chunked are specified, the request message body length is zero.  While
some servers may ignore this, I have encountered several that follow
the RFC in this regard, most recently golang's net/http.
This commit is contained in:
Julian Squires 2020-10-16 12:18:46 -02:30 committed by Thijs
parent e178b1e018
commit 2a76cb906c
1 changed files with 7 additions and 0 deletions
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7
src/http.lua
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@ -283,6 +283,13 @@ local function adjustrequest(reqt)
nreqt.uri = reqt.uri or adjusturi(nreqt)
-- adjust headers in request
nreqt.headers = adjustheaders(nreqt)
if nreqt.source
and not nreqt.headers["content-length"]
and not nreqt.headers["transfer-encoding"]
then
nreqt.headers["transfer-encoding"] = "chunked"
end
-- ajust host and port if there is a proxy
nreqt.host, nreqt.port = adjustproxy(nreqt)
return nreqt