title: Is it possible for Apache to send a 'pause' or 'wait' response to client while running a PHP/Perl script?
body: <p>When the Apache server receives a POST request, I want to immediately send back a response, stating that the client should wait and not send anything.  </p>
  
  <p>While at the same time client's request will be passed on to a script (either PHP or Perl). And then the script will send back a response to the client.  </p>
  
  <p>Is this possible? I know that it is possible for Apache to send a 4xx response header, so that the client would stop sending. But I want to run a script while the client has stopped sending and then have the client redirect to somewhere..</p>