text: #!/usr/bin/python
  # -*- coding: UTF-8 -*-
  
  import os
  import re
  
  hosts_config = """
  server {
      listen 80;
  
      server_name {0};
  
      location / {
          root /wwwroot/{0}/_build/html;
      }
  }
  
  server {
      listen 80;
      server_name www.{0};
  
      location / {
          return 301 http://{0}$request_uri;
      }
  }
  """
  
  host_default = """
  server {
      listen 80 default_server;
      listen [::]:80 default_server ipv6only=on;
  
      server_name _;
  
      return 444;
  }
  """
  
  
  if __name__ == '__main__':
      root_dir = '/wwwroot'
  
      config_dir = '/wwwconfig'
  
      dirs = os.listdir(root_dir)
      from common_config import host_pattern
      writen_cnt = 0
      for k in dirs:
          if re.match(host_pattern,k):
              cfg_str = hosts_config.replace('{0}',k)
              with open(os.path.join(config_dir,k),'w') as fout:
                  fout.write(cfg_str)
              writen_cnt += 1
      if writen_cnt > 0:
          # create a forbid default
          with open(os.path.join(config_dir,'forbid_default'),'w') as fout:
                  fout.write(host_default)
      print('total write {} sites\n',writen_cnt)
  