1. 요청 메시지의 URI 확인
    1. isCgiUri
      1. 우리가 정한 CGI 프로그램 확장자로 끝나는지
      2. 그 위치에 CGI 실행 파일이 있는지
  2. CGI에 요청 메시지에 있는 내용을 넘기기
  3. CGI 실행하고, 결과(STDOUT)를 가져오기
  4. 결과를 가지고 응답 메시지를 생성하여 응답하기

Appendix B. CGI 활용 예제

C 예제

Python - CGI Programming

Python 예제

C++ - CGI Environment Variables

CGI Environment Variables in Python

https://www.ibm.com/docs/ko/netcoolomnibus/8.1?topic=scripts-environment-variables-in-cgi-script

NGINX의 CGI 관련 모듈

https://github.com/nginx/nginx/blob/bfc5b35827903a3c543b58e4562db8b62021c164/src/http/modules/ngx_http_fastcgi_module.c

https://github.com/nginx/nginx/blob/bfc5b35827903a3c543b58e4562db8b62021c164/src/http/modules/ngx_http_uwsgi_module.c

conf

https://github.com/nginx/nginx/blob/a64190933e06758d50eea926e6a55974645096fd/conf/nginx.conf

주요 지시어

https://github.com/nginx/nginx/blob/a64190933e06758d50eea926e6a55974645096fd/conf/fastcgi_params

fastcgi_param  QUERY_STRING       $query_string;
fastcgi_param  REQUEST_METHOD     $request_method;
fastcgi_param  CONTENT_TYPE       $content_type;
fastcgi_param  CONTENT_LENGTH     $content_length;

fastcgi_param  SCRIPT_NAME        $fastcgi_script_name;
fastcgi_param  REQUEST_URI        $request_uri;
fastcgi_param  DOCUMENT_URI       $document_uri;
fastcgi_param  DOCUMENT_ROOT      $document_root;
fastcgi_param  SERVER_PROTOCOL    $server_protocol;
fastcgi_param  REQUEST_SCHEME     $scheme;
fastcgi_param  HTTPS              $https if_not_empty;

fastcgi_param  GATEWAY_INTERFACE  CGI/1.1;
fastcgi_param  SERVER_SOFTWARE    nginx/$nginx_version;

fastcgi_param  REMOTE_ADDR        $remote_addr;
fastcgi_param  REMOTE_PORT        $remote_port;
fastcgi_param  SERVER_ADDR        $server_addr;
fastcgi_param  SERVER_PORT        $server_port;
fastcgi_param  SERVER_NAME        $server_name;

# PHP only, required if PHP was built with --enable-force-cgi-redirect
fastcgi_param  REDIRECT_STATUS    200;

https://github.com/nginx/nginx/blob/a64190933e06758d50eea926e6a55974645096fd/conf/uwsgi_params

uwsgi_param  QUERY_STRING       $query_string;
uwsgi_param  REQUEST_METHOD     $request_method;
uwsgi_param  CONTENT_TYPE       $content_type;
uwsgi_param  CONTENT_LENGTH     $content_length;

uwsgi_param  REQUEST_URI        $request_uri;
uwsgi_param  PATH_INFO          $document_uri;
uwsgi_param  DOCUMENT_ROOT      $document_root;
uwsgi_param  SERVER_PROTOCOL    $server_protocol;
uwsgi_param  REQUEST_SCHEME     $scheme;
uwsgi_param  HTTPS              $https if_not_empty;

uwsgi_param  REMOTE_ADDR        $remote_addr;
uwsgi_param  REMOTE_PORT        $remote_port;
uwsgi_param  SERVER_PORT        $server_port;
uwsgi_param  SERVER_NAME        $server_name;

Nginx) 변수 종류

cgi 관련 config 값