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Nginx agrega encabezados y proxy_pass para omitir CORS

tag-icon • tag-icon nginx reverse-proxy cors
Nginx agrega encabezados y proxy_pass para omitir CORS

Quiero crear un sitio CORS con API en el servidor proxy_pass. Pero

location / {

     if ($request_method = 'OPTIONS') {
        add_header 'Access-Control-Allow-Origin' '*';

        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';

        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';

        add_header 'Access-Control-Max-Age' 86400;
        add_header 'Content-Type' 'text/plain charset=UTF-8';
        add_header 'Content-Length' 0;
        return 204; break;
     }
     if ($request_method = 'POST') {
        add_header 'Access-Control-Allow-Origin' '*';
        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
     }
     if ($request_method = 'GET') {
        add_header 'Access-Control-Allow-Origin' '*';
        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
     }



  location /api/ {
    proxy_pass       http://api:8080/;
    proxy_set_header Host      $host:$server_port;
    proxy_set_header X-Real-IP $remote_addr;
  }
}

devuelve 405 desde aguas arriba. Sin proxy_pass, este fragmento funciona como se esperaba.

¿Cómo romper y devolver 204?

Respuesta1

Ifsno funciona para sububicaciones. Nginx analiza las ubicaciones primero y las ejecuta sin analizar el código principal.

proxy_passno funciona por dentro if. Pero era necesario duplicarlo en ambos lugares.

Entonces puedo moverme ifdentro de la sububicación.

server {
  listen 8080 default_server;
  listen [::]:8080 default_server;
  server_name _;

  location /api/ {

       if ($request_method = 'OPTIONS') {
        add_header 'Access-Control-Allow-Origin' '*';

        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';

        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';

        add_header 'Access-Control-Max-Age' 86400;
        add_header 'Content-Type' 'text/plain charset=UTF-8';
        add_header 'Content-Length' 0;
        return 204; break;
     }

     if ($request_method = 'POST') {
        add_header 'Access-Control-Allow-Origin' '*';
        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
     }
     if ($request_method = 'GET') {
        add_header 'Access-Control-Allow-Origin' '*';
        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
     }

    proxy_pass       http://api:8080/;
    proxy_set_header Host      $host:$server_port;
    proxy_set_header X-Real-IP $remote_addr;
  }
...
}

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