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https://issues.apache.org/jira/browse/TS-2902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14098281#comment-14098281
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Feifei Cai commented on TS-2902:
--------------------------------
My understanding is: User agents SHOULD send Content-Length header when not
send Transfer-Encoding, even for empty body data, a "Content-Length: 0" is
needed. If not send the header, server sends back a 400 response, it MAY send a
411 as an option, to indicate more explicit information. Anyway, server would
reject user agents' request which is without Content-Length and
Transfer-Encoding.
> Allow POST requests without a Content-Length header
> ---------------------------------------------------
>
> Key: TS-2902
> URL: https://issues.apache.org/jira/browse/TS-2902
> Project: Traffic Server
> Issue Type: Improvement
> Reporter: Masakazu Kitajo
> Assignee: Bryan Call
> Labels: review
> Fix For: 5.1.0
>
> Attachments: make_it_configuarable.patch
>
>
> I get "*400* Content Length Required" when user agents send a POST request
> that doesn't contain any body data without a Content-Length header.
> (The header is omitted because the length is zero, I think)
> According to RFC2730 Section 3.3.2, presence of Content-Length is not MUST.
> http://tools.ietf.org/html/rfc7230#section-3.3.2
> {quote}
> A user agent SHOULD send a Content-Length in a request message when
> no Transfer-Encoding is sent and the request method defines a meaning
> for an enclosed payload body.
> {quote}
> Also according to section 3.3.3, a server are allowed to reject similar
> request with 411 Length Required, but not *400*.
> http://tools.ietf.org/html/rfc7230#section-3.3.2
> {quote}
> A server MAY reject a request that contains a message body but not a
> Content-Length by responding with 411 (Length Required).
> {quote}
> Traffic Server should accept the requests, no body data without
> Content-Length header, or reject it with *411*. I think the former one is
> better for interoperability.
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