Web Redirect using Subdomain

The following webserver configs can be used as redirects to GitLab for use as Go module names. Example:

• user.DOMAIN.TLD/project -> OTHER_DOMAIN.TLD/user/project
• DOMAIN.TLD/user/project -> OTHER_DOMAIN.TLD/user/project

Nginx

server {
  listen  443 ssl http2;
  listen  [::]:443 ssl http2;
  server_name
    ~^(?<subdomain>.+)\.DOMAIN\.TLD
    DOMAIN.TLD
  ;

  ssl_certificate             ../fullchain.cer;
  ssl_certificate_key         ../DOMAIN.TLD.key;

  set $subdomain_redirect false;

  if ( $host != "DOMAIN.TLD" ) {
    set $subdomain_redirect true;
  }

  if ( $subdomain_redirect = true ) {
    return 302 https://OTHER_DOMAIN.TLD/$subdomain$request_uri;
  }

  return 302 https://OTHER_DOMAIN.TLD$request_uri;
}

HAProxy

frontend ft_https
  mode http
  bind *:443 ssl crt /usr/local/etc/haproxy/certs/

  # http proxy
  use_backend bk_gitlab_redirect if { hdr(host) -i DOMAIN.TLD }
  use_backend bk_gitlab_redirect if { hdr(host) -m end DOMAIN.TLD }

backend bk_gitlab_redirect
  mode http

  acl is_domain hdr(host) -i DOMAIN.TLD

  http-request redirect code 302 prefix https://OTHER_DOMAIN.TLD if is_domain
  http-request redirect code 302 prefix https://OTHER_DOMAIN.TLD/%[hdr(host),lower,regsub(\.DOMAIN\.TLD$,)] unless is_domain

Custom Go Server

Vanity Domain and Avatar API for GitLab: https://dev.rievo.net/rievo/dev-api