Ngx.poll extension for mod_wsgi

Server NGINX
1

Hi.

For people interested I have designed and implemented an extension for
my WSGI module for Nginx for better support of asynchronous
applications.

Here are some examples:

  1. An example of asynchronous query to a PostgreSQL database:
    http://hg.mperillo.ath.cx/nginx/mod_wsgi/file/tip/examples/nginx-postgres-async.py

    The example make use of a connection pool that can grow
    indefinitely.

  2. An example of HTTP proxy using pycurl:
    http://hg.mperillo.ath.cx/nginx/mod_wsgi/file/tip/examples/nginx-curl.py

  3. A very simple example on how to split a long calculation:
    http://hg.mperillo.ath.cx/nginx/mod_wsgi/file/tip/examples/nginx-hash-async.py

  4. A very simple example of asynchronous HTTP request
    http://hg.mperillo.ath.cx/nginx/mod_wsgi/file/tip/examples/nginx-poll-sleep.py

    The application just “sleeps” for fixed amount of times until the
    request is done.

There are still problems and possible bugs.
I would really appreciate any suggestions about the API design;
unfortunately people on the Python web-sig mailing list are not very
interested in supporting asynchronous applications…

NOTE: the extension does not works with the rtsig event module, a
segmentation fault occur.

The problem is that I simply make use of add_event and del_event, and
the rtisig module does not defines these two operations (the add_event
function pointer is NULL).

Thanks Manlio P.