nginx serving R scripts via CGI/FastRWeb

Francis Daly francis at
Tue Feb 19 17:24:16 UTC 2013

On Tue, Feb 19, 2013 at 12:47:23PM +0000, Stefan Parvu wrote:

Hi there,

This location:

>         location ~ ^/cgi-bin/.*\.cgi$ {

will only match some requests that end in ".cgi" (before the ?, if
that applies).

What you possibly want is a separate location just for your "R" requests.

Something like (untested by me!)

  location ^~ /cgi-bin/R/ { }

in which you have your "fastcgi_pass" directive, plus whatever
"fastcgi_param" directives you need to make it work. That is *probably*

  fastcgi_param    REQUEST_URI  $request_uri;
  fastcgi_param    QUERY_STRING  $query_string;
  fastcgi_param    SCRIPT_FILENAME  $document_root/cgi-bin/R;

but the exact details depend on what your fastcgi server wants.

(You may want to set PATH_INFO, if your application uses that.)

See for the details of which one location{}
is chosen for each request, and then see the fastcgi documentation to
decide exactly what params you need.

Usually, SCRIPT_FILENAME is "the file on the filesystem that the fastcgi
server should execute"; and other things are "stuff that the fastcgi
server or the application can use to decide what to do".

> and Im using fcgiwrap from
> CGI scripts work fine but Im not able to any R scripts probable due
> R being not correctly called via nginx.conf ... 

In this case, yes. Your nginx configuration was such that your requests
for "R" were not being sent to the fastcgi server.

> I am trying something like: http://localhost/cgi-bin/R/foo.png?n=500
> and R is a binary file under cgi-bin directory which should call
> FastRWeb ... 

Provided that the fastcgi server is able to run whatever file you name in
SCRIPT_FILENAME, and has access to whatever other params it cares about,
something like the above configuration has a chance of working.

Francis Daly        francis at

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