Passing params/variables to upstream, similar to FCGI?

Phillip Oldham phill at
Fri Dec 11 14:29:54 MSK 2009

Is it possible to pass parameters/variables to upstream servers, similar 
to how it is done with FastCGI?

For example, if one had a number of WSGI upstream servers and one wanted 
to use the Nginx GeoIP module to set some variables which to which the 
upstream servers had access (from wsgi.environ, maybe), can this be done?

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