File: hello-serv.awk

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gawk 1%3A4.2.1%2Bdfsg-1
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BEGIN {
  RS = ORS = "\r\n"
  HttpService = "/inet/tcp/8080/0/0"
  Hello = "<HTML><HEAD>" \
          "<TITLE>A Famous Greeting</TITLE></HEAD>" \
          "<BODY><H1>Hello, world</H1></BODY></HTML>"
  Len = length(Hello) + length(ORS)
  print "HTTP/1.0 200 OK"          |& HttpService
  print "Content-Length: " Len ORS |& HttpService
  print Hello                      |& HttpService
  while ((HttpService |& getline) > 0)
     continue;
  close(HttpService)
}