sub write_nginx_preview_config()

in lib/ES/Util.pm [590:653]

• 53 lines of code
• 2 McCabe index (conditional complexity)

sub write_nginx_preview_config {
#===================================
    my ( $dest ) = @_;

    my $preview_conf = <<"CONF";
      proxy_pass http://0.0.0.0:3000;
      proxy_http_version 1.1;
      proxy_set_header Host \$host;
      proxy_cache_bypass \$http_upgrade;
      proxy_buffering off;
      gzip on;
      add_header 'Access-Control-Allow-Origin' '*';
      if (\$request_method = 'OPTIONS') {
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'kbn-xsrf-token';
      }
CONF
    # We log the X-Opaque-Id which is a header that Elasticsearch uses to mark
    # requests with an id that is opaque to Elasticsearch. Presumably this is
    # a standard. Either way we follow along. We use it in our tests so we can
    # figure out which request came from which test. That is the only reason
    # we *need* it right now. Presumably we'll find some other use for it later
    # though. Think of it as a distributed trace id.
    my $nginx_conf = <<"CONF";
daemon off;
error_log /dev/stdout info;
pid /run/nginx/nginx.pid;

events {
  worker_connections 64;
}

http {
  error_log /dev/stdout crit;
  log_format short '\$http_x_opaque_id \$http_host \$request \$status';
  access_log /dev/stdout short;

  server {
    listen 8000;
    location = /liveness {
      return 200 "Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn.";
    }
    location = /robots.txt {
      return 200 "User-agent: *\nDisallow: /\n";
    }
    location ~/(guide|diff) {
$preview_conf
    }
    location / {
      alias /docs_build/resources/web/static/;
      try_files \$uri \@preview;
      autoindex off;
    }
    location \@preview {
$preview_conf
    }
    rewrite ^/assets/(.+)\$ https://www.elastic.co/assets/\$1 permanent;
    rewrite ^/gdpr-data\$ https://www.elastic.co/gdpr-data permanent;
    rewrite ^/static/(.+)\$ https://www.elastic.co/static/\$1 permanent;
  }
}
CONF
    $dest->spew( iomode => '>:utf8', $nginx_conf );
}