Can nginx module produce multiple request to upstreams?

[ZHOU Xiaobo]

My demand is:
1) client sends a request to nginx
2) nginx processes this request and sends 2 requests to 2 different backend servers
3) after the 2 responses arrive, nginx builds the response and sends it to client.

so my question is:
can I write a module to do this? Or I have to employ a CGI-like(fcgi/uwsgi etc.) server?

thanks
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Sincerely yours
                         ZHOU Xiaobo
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