请问路由是否支持二级域名呢

upstream webman {
  server 127.0.0.1:8787;
  keepalive 10240;
}
server {
    listen 80;
    server_name api.abc.com;
    access_log off;
    root /your/webman/public;

    location / {
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header Host $host;
      proxy_http_version 1.1;
      proxy_set_header Connection "";
       if (!-f $request_filename){
          rewrite ^/(.*)$ /api/$1 break;
          proxy_pass http://webman;
       }
    }
}