nginx.conf

events {
    worker_connections 1024;
}
http {
    upstream question-service {
        server question-service:3000;
    }
    upstream user-service {
        server user-service:3001;
    }
    upstream matching-service {
        server matching-service:3000;
    }
    upstream collaboration-service {
        server collaboration-service:3002;
    }
    upstream chat-service {
        server chat-service:3003;
    }

    # Add MIME types
    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    # CORS configuration
    map $http_origin $cors_origin {
        default "";
        "http://localhost:5173" "$http_origin";
        "http://localhost:8080" "$http_origin";
        "http://localhost" "$http_origin";
        # Add more allowed origins as needed
    }

    server {
        listen 80;
        server_name localhost;

        # Global CORS configuration
        add_header 'Access-Control-Allow-Origin' $cors_origin always;
        add_header 'Access-Control-Allow-Credentials' 'true' always;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS, PATCH' always;
        add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type, Accept, Origin, X-Requested-With' always;

        location /api/questions/ {
            proxy_pass http://question-service/;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header Origin $http_origin;
        }

        location /api/users/ {
            proxy_pass http://user-service/;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header Origin $http_origin;
        }

        location /api/match/ {
            proxy_pass http://matching-service/;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header Origin $http_origin;

            add_header 'Access-Control-Allow-Origin' $cors_origin always;
            add_header 'Access-Control-Allow-Credentials' 'true' always;

            # # Handle preflight OPTIONS requests
            if ($request_method = 'OPTIONS') {
                add_header 'Access-Control-Allow-Origin' $cors_origin always;
                add_header 'Access-Control-Allow-Credentials' 'true' always;
                add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS, PATCH' always;
                add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type, Accept, Origin, X-Requested-With' always;
                add_header 'Access-Control-Max-Age' 86400;
                add_header 'Content-Type' 'text/plain charset=UTF-8';
                add_header 'Content-Length' 0;
                return 204;
            }

        }

        location /api/collaboration/ {
            proxy_pass http://collaboration-service/;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header Origin $http_origin;
        }

        location /api/chat/ {
            proxy_pass http://chat-service/;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header Origin $http_origin;

            add_header 'Access-Control-Allow-Origin' $cors_origin always;
            add_header 'Access-Control-Allow-Credentials' 'true' always;

            # # Handle preflight OPTIONS requests
            if ($request_method = 'OPTIONS') {
                add_header 'Access-Control-Allow-Origin' $cors_origin always;
                add_header 'Access-Control-Allow-Credentials' 'true' always;
                add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS, PATCH' always;
                add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type, Accept, Origin, X-Requested-With' always;
                add_header 'Access-Control-Max-Age' 86400;
                add_header 'Content-Type' 'text/plain charset=UTF-8';
                add_header 'Content-Length' 0;
                return 204;
            }

        }
    }

    # Socket.io server for Matching Service
    server {
        listen 3000;
        server_name localhost;

        # Global CORS configuration
        add_header 'Access-Control-Allow-Origin' $cors_origin always;
        add_header 'Access-Control-Allow-Credentials' 'true' always;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS, PATCH' always;
        add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type, Accept, Origin, X-Requested-With' always;

        location /socket.io/ {
            proxy_pass http://matching-service;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header Origin $http_origin;
            add_header 'Access-Control-Allow-Origin' $cors_origin always;
            add_header 'Access-Control-Allow-Credentials' 'true' always;
            # # Handle preflight OPTIONS requests
            if ($request_method = 'OPTIONS') {
                add_header 'Access-Control-Allow-Origin' $cors_origin always;
                add_header 'Access-Control-Allow-Credentials' 'true' always;
                add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS, PATCH' always;
                add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type, Accept, Origin, X-Requested-With' always;
                add_header 'Access-Control-Max-Age' 86400;
                add_header 'Content-Type' 'text/plain charset=UTF-8';
                add_header 'Content-Length' 0;
                return 204;
            }
        }
    }

    # Socket.io server for Collab Service
    server {
        listen 3002;
        server_name localhost;

        # Global CORS configuration
        add_header 'Access-Control-Allow-Origin' $cors_origin always;
        add_header 'Access-Control-Allow-Credentials' 'true' always;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS, PATCH' always;
        add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type, Accept, Origin, X-Requested-With' always;

        location /socket.io/ {
            proxy_pass http://collaboration-service;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header Origin $http_origin;
            add_header 'Access-Control-Allow-Origin' $cors_origin always;
            add_header 'Access-Control-Allow-Credentials' 'true' always;
            # # Handle preflight OPTIONS requests
            if ($request_method = 'OPTIONS') {
                add_header 'Access-Control-Allow-Origin' $cors_origin always;
                add_header 'Access-Control-Allow-Credentials' 'true' always;
                add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS, PATCH' always;
                add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type, Accept, Origin, X-Requested-With' always;
                add_header 'Access-Control-Max-Age' 86400;
                add_header 'Content-Type' 'text/plain charset=UTF-8';
                add_header 'Content-Length' 0;
                return 204;
            }
        }
    }

    # Socket.io server for Chat Service
    server {
        listen 3003;
        server_name localhost;

        # Global CORS configuration
        add_header 'Access-Control-Allow-Origin' $cors_origin always;
        add_header 'Access-Control-Allow-Credentials' 'true' always;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS, PATCH' always;
        add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type, Accept, Origin, X-Requested-With' always;

        location /socket.io/ {
            proxy_pass http://chat-service;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header Origin $http_origin;
            add_header 'Access-Control-Allow-Origin' $cors_origin always;
            add_header 'Access-Control-Allow-Credentials' 'true' always;
            # # Handle preflight OPTIONS requests
            if ($request_method = 'OPTIONS') {
                add_header 'Access-Control-Allow-Origin' $cors_origin always;
                add_header 'Access-Control-Allow-Credentials' 'true' always;
                add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, OPTIONS, PATCH' always;
                add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type, Accept, Origin, X-Requested-With' always;
                add_header 'Access-Control-Max-Age' 86400;
                add_header 'Content-Type' 'text/plain charset=UTF-8';
                add_header 'Content-Length' 0;
                return 204;
            }
        }
    }
}