innmind/log-reader

Parse log files

Log reader

, _(*1)

Allow you to parse symfony and apache access logs., _(*2)

BEWARE, it can take a lot of time depending on the amount of data (For a typical symfony dev.log it starts to really slow down after 10k lines), _(*3)

Installation

composer require innmind/log-reader

Usage

use Innmind\LogReader\{
    Reader,
    LineParser\Monolog,
    Log,
};
use Innmind\OperatingSystem\Factory;
use Innmind\Filesystem\Name;
use Innmind\Url\Path;
use Psr\Log\LogLevel;

$os = Factory::build();

$read = Reader::of(
    Monolog::of($os->clock()),
);
$os
    ->filesystem()
    ->mount(Path::of('var/logs/'))
    ->get(Name::of('prod.log'))
    ->map(static fn($file) => $file->content())
    ->map($read)
    ->map(
        static fn($logs) => $logs
            ->filter(
                static fn($log) => $log
                    ->attribute('level')
                    ->filter(static fn($level) => $level->value() === LogLevel::CRITICAL)
                    ->match(
                        static fn() => true,
                        static fn() => false,
                    ),
            )
            ->foreach(
                static fn($log) => $log
                    ->attribute('message')
                    ->match(
                        static fn($attribute) => print($attribute->value()),
                        static fn() => print('No message found'),
                    ),
            ),
        static fn() => print('File does not exist'),
    );

The above example will print all messages that were logged at a critical level., _(*4)

Note: if parsing the context or extra attributes of a monolog line fail they won't be exposed as attributes in the Log object. This behaviour is implemented to not make the whole parsing fail due to this error., _(*5)

Note 2: if a line can't be parsed for some reason it will simply be ignored and not exposed. Again this behaviour is implemented to not make the whole parsing fail., _(*6)