Created
March 17, 2012 05:38
-
-
Save rjz/2055426 to your computer and use it in GitHub Desktop.
Heroku log parser
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
<?php | |
if (!class_exists('HerokuParser')): | |
/** | |
* A super-quick parser for Heroku logfiles | |
*/ | |
class HerokuParser { | |
/** | |
* Filter a string against the specified criteria | |
* | |
* @param string the input string | |
* @param string (optional) the source of the message (e.g., "app") | |
* @param string (optional) the process (e.g., "web.1") | |
* @return string the line, or blank if the filter failed | |
*/ | |
protected function filter ($line, $source = '', $process = '') { | |
$source_test = $process_test = '.*?'; | |
if ($source) { | |
$source_test = "$source"; | |
} | |
if ($process) { | |
$process_test = "$process\.?[0-9]*"; | |
} | |
$test = sprintf('#\s%s\[%s\]\:\s#', $source_test, $process_test); | |
if (preg_match($test, $line)) { | |
return $line; | |
} | |
return ''; | |
} | |
/** | |
* Parse the contents of a single line | |
* | |
* Returns an associative array describing the contents of the line: | |
* | |
* - timestamp: when the message was logged | |
* - source: the source of the message | |
* - process: the source process logging the message | |
* - message: the message | |
* | |
* @param string the input string | |
* @return array | |
*/ | |
protected function parse ($line) { | |
// timestamp source[process]: message | |
$components = explode(' ', $line); | |
$timestamp = array_shift($components); | |
$dyno = explode('[', array_shift($components)); | |
$message = implode(' ', $components); | |
return array( | |
'timestamp' => strtotime($timestamp), | |
'source' => $dyno[0], | |
'process' => substr($dyno[1], 0, -2), | |
'message' => trim($message) | |
); | |
} | |
/** | |
* Parse a Heroku log file | |
* | |
* @param string the source of the message (e.g. "app") | |
* @param string the process ID (e.g., "web.1") | |
* @return an array of entries matching the filter criteria | |
*/ | |
public function run ($logfile, $source = '', $process = '') { | |
$entries = array(); | |
if (!($fp = fopen($logfile, 'r'))) { | |
die('failed opening logfile:' . $fp); | |
} | |
while(($line = fgets($fp)) !== false) { | |
// compare the current line against any source/process filters | |
if ($line = $this->filter($line, $source, $process)) { | |
// parse coarse | |
$line = $this->parse($line); | |
if ($line['message']) { | |
$entries[] = $line; | |
} | |
} | |
} | |
return $entries; | |
fclose($fp); | |
} | |
} | |
endif; // class_exists |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment