POST request help

[blindpet]

I have found your quite old post here and was hoping you could elaborate.

I have a POST request that looks like this

action=ssbp_lazy&security=6cd3beb195&ssbppostid=992&ssbptitle=Setup+uTorrent+Server+Bloatware+Free&ssbpurl=http%3A%2F%2Fwww.htpcguides.com%2Fsetup-utorrent-server-bloatware-free%2F&ssbpshorturl=&ssbpsharetext

and a response that looks like this

Do I need to deal with the hash for both the request and the response? Here is what I have so far

import parsereq;
sub vcl_recv{
  parsereq.init();

If req.url ~ admin.ajax.php && req.method == "POST" {
    parsereq.post_body();
    return (hash); 

}
sub vcl_hash{
  hash_data(parsereq.post_header("hogehoge"));
}

What is hoge?