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From bugzi...@apache.org
Subject [Bug 60330] New: reverse proxy of 100-continue aware backend, sends 100 continue even when backend does not
Date Wed, 02 Nov 2016 16:07:57 GMT
https://bz.apache.org/bugzilla/show_bug.cgi?id=60330

            Bug ID: 60330
           Summary: reverse proxy of 100-continue aware backend, sends 100
                    continue even when backend does not
           Product: Apache httpd-2
           Version: 2.4.23
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: mod_proxy_http
          Assignee: bugs@httpd.apache.org
          Reporter: jrwren@xmtp.net
  Target Milestone: ---

Reverse proxy of 100-continue aware backend, sends 100 continue even when
backend does not. This causes a client to think it should write a request body,
while the backend may still respond with a 400 and not read the request body.
mod_proxy_http then responds with 502 as a result of AH01097: pass request body
failed

The backend is doing the right thing: it did not send a 100 continue so it
should not be required to read a request body, regardless of transfer encoding
or content-length.

Expected:

mod_proxy_http reverse proxy should not send 100-continue to a client unless
the backend does.

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