Fast CGI module "multipart/mixed" problem (it only accepts 1 "Content-Type" header)

It seems, when my FCGI server responds to NGINX with “Status: 200
OK\r\nContent-Type:
multipart/mixed;boundary=whatever\r\n\r\nboundary=whatever\r\nContent-Type:
image/jpeg\r\n\r\n”

The FASTCGI module is taking the 2nd “Content-Type” only and uses it in
the
initial response with the 200.

The client gets confused when it sees the boundaries and data later.
If I remove the subsequent “Content-Type:” headers, the initial one with
the
boundary indicator is sent; however, the client now does not know how to
interpret the .

Posted at Nginx Forum:
http://forum.nginx.org/read.php?2,246487,246487#msg-246487

Hello!

On Wed, Jan 15, 2014 at 11:56:30AM -0500, ariesone wrote:

boundary indicator is sent; however, the client now does not know how to
interpret the .

The second Content-Type header is expected to be in response body
from nginx point of view (i.e., after double CRLF which marks end
of headers), and nginx shouldn’t try to interpret it anyhow.

While string you provided looks correct at a first glance, it may
be incorrect depending on language and OS used (e.g., in Perl on
Windows it will likely produce wrong results due to “\n” expanded
to CRLF). Symptoms suggest this is likely the cause and you
should focus on what your app actually returns.


Maxim D.
http://nginx.org/

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