overleaf/server-ce/nginx/clsi-nginx.conf

# keep in sync with services/clsi/nginx.conf
# Changes to the above:
#  - added Security-Headers
#  - remove CORS rules, Server-CE/Server-Pro runs behind a single origin
#  - change /output path to /var/lib/overleaf/data/output
#  - remove tiny.pdf endpoints

server {
  add_header 'X-Served-By' 'clsi-nginx' always;

  # Security-Headers
  add_header 'X-Content-Type-Options' 'nosniff' always;
  add_header 'X-Download-Options' 'noopen' always;
  add_header 'X-Frame-Options' 'SAMEORIGIN' always;
  add_header 'X-XSS-Protection' '1; mode=block' always;

  listen 8080;
  server_name clsi-nginx;
  server_tokens off;
  access_log off;
  # Ignore symlinks possibly created by users
  disable_symlinks on;
  # enable compression for tex auxiliary files, but not for pdf files
  gzip on;
  gzip_types text/plain;
  gzip_proxied any;
  types {
      text/plain log blg aux stdout stderr;
      application/pdf pdf;
  }
  # handle output files for specific users
  location ~ ^/project/([0-9a-f]+)/user/([0-9a-f]+)/build/([0-9a-f-]+)/output/(.+)$ {
    rewrite ^/project/([0-9a-f]+)/user/([0-9a-f]+)/build/([0-9a-f-]+)/output/(.+)$ /$4 break;
    root /var/lib/overleaf/data/output/$1-$2/generated-files/$3/;
  }
  # handle output files for anonymous users
  location ~ ^/project/([0-9a-f]+)/build/([0-9a-f-]+)/output/(.+)$ {
    rewrite ^/project/([0-9a-f]+)/build/([0-9a-f-]+)/output/(.+)$ /$3 break;
    root /var/lib/overleaf/data/output/$1/generated-files/$2/;
  }

  # PDF range for specific users
  location ~ ^/project/([0-9a-f]+)/user/([0-9a-f]+)/content/([0-9a-f-]+/[0-9a-f]+)$ {
    # Cache for one day
    expires 1d;
    alias /var/lib/overleaf/data/output/$1-$2/content/$3;
  }
  # PDF range for anonymous users
  location ~ ^/project/([0-9a-f]+)/content/([0-9a-f-]+/[0-9a-f]+)$ {
    # Cache for one day
    expires 1d;
    alias /var/lib/overleaf/data/output/$1/content/$2;
  }

  # Do not look up any non matching files in the default root.
  location / {
    return 404;
  }
}