Re: Re: Re: Net::FTP Wrapper: TCP problem

[petral]

Not 'recreated', but what _can_ happen is that you call an ftp command: ``$ftp->cmd(@args);''   which, as you know, is translated by perl as: Package::cmd($ftp, cmd, @args) ((here package is Net::FTP::...)).

Inside cmd($ftp, ...), it does an ``undef $_[0];'' if, and only if, it discovers a broken connection.

Next time you want to do an ftp cmd, you retrieve your _stored_ $ftp, (which is still defined and therefore still pointing to the right package::funcs) and send off another command.   ...Result, it hangs...

For instance, here's the ``put()'', I've used for a couple of years in my wrapper code:

# put: return ok = '' if 'no permission' error (ie, don't retry)

sub put {
  $_[0]->SUPER::put(@_[1..$#_]) # rtns ok/!ok;$_[0] undef'd if abort
    or check($_[0])            # $_[0] can be undef'd here to hangup
}

(and in ``check()'':)

. . .

  if ($code == 000 ||                   # got here w/ no resp
      $code == '021' || $code == 421 || # server timeout || abort
      $code == 425 ||      # connection not opened ('out of ports'?)
      $code == 150) {      # intermediate result (never finished)

    $code < 100  and warn " No response (Timeout?).\n";
    150 == $code and warn "\tTimed out in mid-operation.\n";
    421 == $code and warn "\tServer disconnected.\n";
    425 == $code and warn "\tRestarting to clear connections.\n"
                  and sleep 10;
    warn "attempting to reconnect? ...\n";

    undef $_[0];
    return undef;
  }

  if ($code == 530) {     # not logged in! ** needs to croak() **
    die "Can't seem to login!
   (check ~/.netrc file or give name and password on command line?).
          (I'm dieing) \n";
  }

  if ( $code == 550   # dir/file not available (non-exist, no perms)
       || (500 <= $code && $code <= 504)   # syntax errors
       || $code == 553                     # illegal file name
       || $code == 452 || $code == 552 ) { # out of space(552: quota)
    return '';
  }

  if ($code == 426                     # closed early
      || $code == 450 || $code == 451  # file busy, srvr local error
      || $code == '051') {             # added this: local rcv error

    warn "\tTemporary failure, retrying...\n";
    sleep 12;
    return undef;                           # retry
  }

  p