nginx silently drops response body of POST depending on its length

[zildjohn01]

Thanks, that helped point me to the issue. It turns out the problem was
that I didn't pass --pep3333-input to uWSGI, so it was converting all
CRLFs to LFs in the request body, so CONTENT_LENGTH didn't match the
data length. Passing that flag to uWSGI made it pass the raw stream to
my app and solved the problem.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,196581,196761#msg-196761