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Perl Script Keeps Closing

Posted on 2011-02-17
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Last Modified: 2012-05-11
I am a PERL novice but have this example script that connects to a news service and downloads XML data through a TCP port.  The script is supposed to run continuously monitoring the xml as it comes in throughout the day.  But currently after each bit of xml comes across the script stops and kicks me back out to a command prompt.  (I'm using activeperl on Windows but I doubt that matters).  How do I get it to run continuously?  Below is the end of the script.  I'll post the entire 75 line file if you want but I imagine the problem is somewhere in these few lines.  I tried commenting out the last three lines but that had no effect.
while ($socket)
{
      ## receive each line of content
      $socket->recv($data,100,0);
      print $data;
      print LOG $data;
      last if $data =~ m,</message>,i;
}

close LOG;
close $socket;
exit 0;

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Question by:Thread7
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group0 earned 500 total points
ID: 34919537
Line 7 is breaking out of the while loop as soon as it hits a </message> tag and falling through to lines that terminate the script.

Also, since it's a TCP connection, you need to handle the possibility that the remote end closes the connection.  You can have a while(1) loop that periodically connects to the service, fetches the XML, closes the connection and then sleeps for a bit before beginning the next iteration.  However, if you need to make sure you're not logging duplicate data, you'll need to do some processing on the returned data and somehow keep track of messages that have already been received.
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Author Closing Comment

by:Thread7
ID: 34919980
Commenting out that line worked perfectly.  I guess I need to know more Perl before doing the other tasks you mention.
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