user                    nginx;
error_log               /var/log/nginx/error.log debug;
pid                     /var/run/nginx.pid;
worker_processes        auto;
worker_rlimit_nofile    33282;

events {
  worker_connections  1024;
}

http {
  limit_req_zone $binary_remote_addr zone=ratelimit:10m rate=20r/s;
  include       /etc/nginx/mime.types;
  default_type  application/octet-stream;
  charset utf-8;
  sendfile on;
  tcp_nopush on;
  tcp_nodelay on;
  server_tokens off;
  types_hash_max_size 2048;

  # buffering
  client_body_buffer_size 1K;
  client_header_buffer_size 1k;
  client_max_body_size 10M;
  ignore_invalid_headers off;
  proxy_buffering off;

  log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';
  
  map $http_upgrade $connection_upgrade {
    default     "upgrade";
  }

  server { 
    listen       10000 default_server;
    listen  [::]:10000 default_server;
    server_name  _;
    port_in_redirect off;

    # Security Headers
    add_header X-Frame-Options SAMEORIGIN always;
    add_header X-Content-Type-Options nosniff always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Content-Security-Policy  "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://cdn.budi.live https://js.intercomcdn.com https://widget.intercom.io; style-src 'self' 'unsafe-inline' https://cdn.jsdelivr.net https://fonts.googleapis.com https://rsms.me; object-src 'none'; base-uri 'self'; connect-src 'self' https://api-iam.intercom.io https://app.posthog.com wss://nexus-websocket-a.intercom.io; font-src 'self' data: https://cdn.jsdelivr.net https://fonts.gstatic.com https://rsms.me; frame-src 'self'; img-src http: https: data:; manifest-src 'self'; media-src 'self'; worker-src 'none';" always;

    location /app {
      proxy_pass      http://app-service.budibase.svc.cluster.local:4002;
      rewrite ^/app/(.*)$ /$1 break;
    }

    location = / {
      port_in_redirect off;
      proxy_http_version  1.1;
      proxy_set_header    Connection          $connection_upgrade;
      proxy_set_header    Upgrade             $http_upgrade;
      proxy_set_header    Host                $host;
      proxy_set_header    X-Real-IP           $remote_addr;
      proxy_set_header    X-Forwarded-For     $proxy_add_x_forwarded_for;
      proxy_pass      http://app-service.budibase.svc.cluster.local:4002;
    }

    location /builder/ {
      port_in_redirect off;
      proxy_http_version  1.1;
      proxy_set_header    Connection          $connection_upgrade;
      proxy_set_header    Upgrade             $http_upgrade;
      proxy_set_header    Host                $host;
      proxy_set_header    X-Real-IP           $remote_addr;
      proxy_set_header    X-Forwarded-For     $proxy_add_x_forwarded_for;
      proxy_pass      http://app-service.budibase.svc.cluster.local:4002;
    }

    location ~ ^/(builder|app_) {
      port_in_redirect off;
      proxy_http_version  1.1;
      proxy_set_header    Connection          $connection_upgrade;
      proxy_set_header    Upgrade             $http_upgrade;
      proxy_set_header    Host                $host;
      proxy_set_header    X-Real-IP           $remote_addr;
      proxy_set_header    X-Forwarded-For     $proxy_add_x_forwarded_for;
      proxy_pass      http://app-service.budibase.svc.cluster.local:4002;
    }

    location ~ ^/api/(system|admin|global)/ {
      proxy_pass      http://worker-service.budibase.svc.cluster.local:4001;
    }

    location /worker/ {
      proxy_pass      http://worker-service.budibase.svc.cluster.local:4001;
      rewrite ^/worker/(.*)$ /$1 break;
    }

    location /api/ {
      # calls to the API are rate limited with bursting
      limit_req zone=ratelimit burst=20 nodelay;

      # 120s timeout on API requests
      proxy_read_timeout 120s;
      proxy_connect_timeout 120s;
      proxy_send_timeout 120s; 

      proxy_http_version  1.1;
      proxy_set_header    Connection          $connection_upgrade;
      proxy_set_header    Upgrade             $http_upgrade;
      proxy_set_header    Host                $host;
      proxy_set_header    X-Real-IP           $remote_addr;
      proxy_set_header    X-Forwarded-For     $proxy_add_x_forwarded_for;

      proxy_pass      http://app-service.budibase.svc.cluster.local:4002;
    }

    location /db/ {
      proxy_pass      http://budibase-prod-svc-couchdb:5984;
      rewrite ^/db/(.*)$ /$1 break;
    }

    location / {
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header X-Forwarded-Proto $scheme;
      proxy_set_header Host $http_host;
      proxy_set_header Connection "";
      proxy_http_version 1.1;
      chunked_transfer_encoding off;

      proxy_connect_timeout 300;
      proxy_pass      http://minio-service.budibase.svc.cluster.local:9000;
    }

    client_header_timeout 60;
    client_body_timeout   60;
    keepalive_timeout     60;

    # gzip
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types text/plain text/css text/xml application/json application/javascript application/rss+xml application/atom+xml image/svg+xml;
  }
}