That doesn't work. See Re^3: Why am I getting "premature end of script header"? - eval { use } for an explanation. What one could do is replace the aformentioned 

BEGIN {
   eval("
      use LWP::UserAgent ();
      use HTTP::Request::Common;
   ");

   if ($@) {
      ...
   }
}

...

[download]

with 

BEGIN {
   eval {
      require LWP::UserAgent;
      require HTTP::Request::Common;
      import HTTP::Request::Common;
   };

   if ($@) {
      ...
   }
}

...

[download]

The difference between the two is just a question of style.

In reply to Re^2: Why am I getting "premature end of script header"? by ikegami
in thread Why am I getting "premature end of script header"? by lokiloki

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