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A comment on Ask HN: How, bottom to top, does a modern web application work?.

Re:Ask HN: How, bottom to top, does a modern web application... by rockerBOO on Tuesday July 14, 2015 @11:06PM (#9889495)
Apache is a web server that add parsers as modules (php). NGINX is a reverse proxy/web server that can proxy to other processes listening on other ports. (PHP-FastCGI running on port 3000).

BROWSER -> NGINX (80) -> PHP-FastCGI (3000) -> NGINX -> BROWSER

NGINX can also proxy on sockets

BROWSER -> NGINX (80) -> PHP-FastCGI (/usr/socks/php.socks) -> NGINX -> BROWSER

CGI just defines the interface, and the language would be implementing the interface.

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Re:Ask HN: How, bottom to top, does a modern web application... by dnotrael on Wednesday July 15, 2015 @12:49AM (#9889768)
Very succinct answer! Thank you. I am still a bit confused as to what interface CGI exposes? Is it a way for a programming language to take a HTTP request? As in, PHP-FastCGI is an implementation in PHP of receiving the HTTP request as data, and then calling the appropriate handler in the application?
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