scgi

gemini://gemini.bunburya.eu/gemlog/posts/2021-04-07-dynamic-content-scgi-gemini.gmi

Client sends a request to the server
Server sends information about the request to a socket
Another running program (the SCGI application), reads the information from the socket
The SCGI application sends some output back to the socket
The server reads the output from the sockets and sends it to the client