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I'm wondering what protocol is used for communication between web server, e.g. Apache, Nginx and CGI, e.g. FCGI, UWSGI?

micgeronimo
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1 Answers1

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uWSGI uses the uwsgi protocol (which is somehow related to the WSGI interface, but I'm not sure how), while FastCGI & fgcid use the FastCGI protocol.

Traditional "CGI" didn't have much of a protocol at all – the server would just spawn (fork+exec) the CGI script with HTTP request headers in environment variables (e.g. $HTTP_REFERER), and the script would print a raw HTTP reply to stdout.

grawity
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