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A short program to handle substantial data
Introduction example from a Well House Consultants training course
More on Introduction [link]
Source code: pear_ex Module: P201
=head1 When you're learning Perl (or any programming language), there's a lot of theory and restricted examples before you can see the whole picture, and it can get somewhat depressing to be writing code to handle a couple of lines of input when you really want to do Practical Extraction & Reporting in the Language So here's an example from the end of the first day of last week's course, where I took a 40 Mb log file and came up with some stats in just a few lines of code. I can't give you the 22 Mbyte file off our servers for you to use ... but I can tell you that it should work with a file off your server in either the "common" or "combined" Apache http server log file format. =cut # 77.88.24.25 - - [20/Jun/2010:03:32:17 +0100] # "GET /resources/ex.php4?item=t205/rf2a HTTP/1.1" 200 15666 "-" # "Yandex/1.01.001 (compatible; Win16; I)" open (DOORKNOB,"ac_20100624") or die ($!); $teapot = 0; $lost=0; $aok=0; $forbid=0; while ($lyne = <DOORKNOB>) { $owmany++; @parts = split(/\s+/,$lyne); # print "$parts[0] $parts[8] $parts[9]\n"; if ($parts[8] == 200) { $aok++; } if ($parts[8] == 404) { $lost++; } if ($parts[8] == 403) { $forbid++; } if ($parts[8] == 418) { $teapot++; } } print ("There were $owmany lines in that!\n"); print ("Of them, $aok were good and $lost were not found\n"); print ("Of them, $forbid were forbidden and $teapot were teapot claims\n"); __END__ Sample file download and output ftp> get ac_20100624 local: ac_20100624 remote: ac_20100624 200 EPRT command successful. Consider using EPSV. 150 Opening BINARY mode data connection for ac_20100624 (39106242 bytes). 100% |******************************| 38189 KB 804.21 KB/s 00:00 ETA 226 File send OK. 39106242 bytes received in 00:47 (802.91 KB/s) ftp> quit 221 Goodbye. Dorothy-2:j10p grahamellis$ perl pear_ex There were 158284 lines in that! Of them, 150471 were good and 559 were not found Of them, 1628 were forbidden and 0 were teapot claims Dorothy-2:j10p grahamellis$ Learn about this subject
This module and example are covered on the following public courses:
* Deploying LAMP - Linux, Apache, MySQL, Perl/PHP * Linux Web Server * Perl Programming * Perl bootcamp * Learning to program in Perl * Perl Programming Also available on on site courses for larger groups Books covering this topic
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Other Examples
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