Big file upload through proxy problem

[Maxim Dounin]

Hello!

On Tue, Dec 23, 2014 at 02:17:38PM -0500, Guest13778 wrote:

> Sorry, I forgot to post an example:
> 
> # curl -v -F file=@test.tar.gz -T http:/mydomain.com
> * About to connect() to mydomain.com port 80 (#0)
> *   Trying 192.168.15.1... connected
> * Connected to mydomain.com (192.168.15.1) port 80 (#0)
> > POST / HTTP/1.1
> > User-Agent: curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7
> NSS/3.14.0.0 zlib/1.2.3 libidn/1.18 libssh2/1.4.2
> > Host: mydomain.com
> > Accept: */*
> > Content-Length: 3337675
> > Expect: 100-continue
> > Content-Type: multipart/form-data;
> boundary=----------------------------a12017330dd6
> >
> < HTTP/1.1 100 Continue
> < HTTP/1.1 413 Request Entity Too Large

The "100 Continue" response before the "413 Request Entity Too 
Large" suggests that something non-trivial happens in your setup - 
normally nginx will just return 413, without useless "100 
Continue" before it.  This may indicate, for example, that double 
proxying happens, and the error about too large body is returned 
by second nginx.

Try looking into nginx error log, it should have additional 
information (in particular, it will indicate server block where 
the error was generated).  Note though, that currently in your 
config logging level is set to "crit", i.e., logging is 
effectively switched off.  You'll have to set some reasonable 
logging level to see what nginx has to say - at least "error" in 
this particular case.  If still in doubt, a debugging log can be 
used to find out low-level details, see 
http://wiki.nginx.org/Debugging.

-- 
Maxim Dounin
http://nginx.org/