user user;
daemon off;
worker_processes auto;
pid /tmp/nginx.pid;
error_log /app/error.log;

events {
    worker_connections 1024;
    # multi_accept on;
}

http {
    ##
    # Basic Settings
    ##

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    # server_tokens off;

    client_max_body_size 512m;

    # server_names_hash_bucket_size 64;
    # server_name_in_redirect off;

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

    ##
    # SSL Settings
    ##

    ssl_protocols TLSv1 TLSv1.1 TLSv1.2 TLSv1.3; # Dropping SSLv3, ref: POODLE
    ssl_prefer_server_ciphers on;

    ##
    # Logging Settings
    ##

    # access_log /dev/stdout;
    # error_log /dev/stderr;

    ##
    # Gzip Settings
    ##

    gzip on;

    # gzip_vary on;
    # gzip_proxied any;
    # gzip_comp_level 6;
    # gzip_buffers 16 8k;
    # gzip_http_version 1.1;
    # gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

    map $http_upgrade $connection_upgrade {
        default upgrade;
        '' close;
    }
    map $remote_addr $proxy_forwarded_elem {
        # IPv4 addresses can be sent as-is
        ~^[0-9.]+$        "for=$remote_addr";
    
        # IPv6 addresses need to be bracketed and quoted
        ~^[0-9A-Fa-f:.]+$ "for=\"[$remote_addr]\"";
    
        # Unix domain socket names cannot be represented in RFC 7239 syntax
        default           "for=unknown";
    }
    map $http_forwarded $proxy_add_forwarded {
        default "$proxy_forwarded_elem";
    }

    proxy_next_upstream_tries 3;

    upstream azureServer {
        {{UPSTREAM_SERVERS}}
    }

    server {
        listen 48080;

        location / {
            proxy_pass http://azureServer;    # 你部署的地址和端口
            proxy_http_version        1.1;
            # proxy_cache_bypass      $http_upgrade;

            # Proxy headers
            proxy_set_header Upgrade             $http_upgrade;
            proxy_set_header Connection          $connection_upgrade;
            proxy_set_header Host                $host;
            proxy_set_header X-Real-IP           $remote_addr;
            proxy_set_header Forwarded           $proxy_add_forwarded;
            proxy_set_header X-Forwarded-For     $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto   $scheme;
            proxy_set_header X-Forwarded-Host    $host;
            proxy_set_header X-Forwarded-Port    $server_port;

            # Proxy timeouts
            proxy_connect_timeout    60s;
            proxy_send_timeout       60s;
            proxy_read_timeout       60s;
        }
    }
}