/usr/share/perl5/Mojo/Log.pm is in libmojolicious-perl 4.63+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 | package Mojo::Log;
use Mojo::Base 'Mojo::EventEmitter';
use Carp 'croak';
use Fcntl ':flock';
use Mojo::Util 'encode';
has handle => sub {
# File
if (my $path = shift->path) {
croak qq{Can't open log file "$path": $!}
unless open my $file, '>>', $path;
return $file;
}
# STDERR
return \*STDERR;
};
has level => 'debug';
has 'path';
# Supported log level
my $LEVEL = {debug => 1, info => 2, warn => 3, error => 4, fatal => 5};
sub new {
my $self = shift->SUPER::new(@_);
$self->on(message => \&_message);
return $self;
}
sub debug { shift->log(debug => @_) }
sub error { shift->log(error => @_) }
sub fatal { shift->log(fatal => @_) }
sub format {
my ($self, $level, @lines) = @_;
return encode 'UTF-8',
'[' . localtime(time) . "] [$level] " . join("\n", @lines, '');
}
sub info { shift->log(info => @_) }
sub is_debug { shift->is_level('debug') }
sub is_error { shift->is_level('error') }
sub is_fatal { shift->is_level('fatal') }
sub is_info { shift->is_level('info') }
sub is_level {
my ($self, $level) = @_;
return $LEVEL->{lc $level} >= $LEVEL->{$ENV{MOJO_LOG_LEVEL} || $self->level};
}
sub is_warn { shift->is_level('warn') }
sub log { shift->emit('message', lc(shift), @_) }
sub warn { shift->log(warn => @_) }
sub _message {
my ($self, $level) = (shift, shift);
return unless $self->is_level($level) && (my $handle = $self->handle);
flock $handle, LOCK_EX;
$handle->print($self->format($level, @_)) or croak "Can't write to log: $!";
flock $handle, LOCK_UN;
}
1;
=encoding utf8
=head1 NAME
Mojo::Log - Simple logger
=head1 SYNOPSIS
use Mojo::Log;
# Log to STDERR
my $log = Mojo::Log->new;
# Customize log file location and minimum log level
my $log = Mojo::Log->new(path => '/var/log/mojo.log', level => 'warn');
# Log messages
$log->debug('Why is this not working?');
$log->info('FYI: it happened again.');
$log->warn('This might be a problem.');
$log->error('Garden variety error.');
$log->fatal('Boom!');
=head1 DESCRIPTION
L<Mojo::Log> is a simple logger for L<Mojo> projects.
=head1 EVENTS
L<Mojo::Log> inherits all events from L<Mojo::EventEmitter> and can emit the
following new ones.
=head2 message
$log->on(message => sub {
my ($log, $level, @lines) = @_;
...
});
Emitted when a new message gets logged.
$log->unsubscribe('message');
$log->on(message => sub {
my ($log, $level, @lines) = @_;
say "$level: ", @lines;
});
=head1 ATTRIBUTES
L<Mojo::Log> implements the following attributes.
=head2 handle
my $handle = $log->handle;
$log = $log->handle(IO::Handle->new);
Log filehandle used by default L</"message"> event, defaults to opening
L</"path"> or C<STDERR>.
=head2 level
my $level = $log->level;
$log = $log->level('debug');
Active log level, defaults to C<debug>. Available log levels are C<debug>,
C<info>, C<warn>, C<error> and C<fatal>, in that order. Note that the
MOJO_LOG_LEVEL environment variable can override this value.
=head2 path
my $path = $log->path
$log = $log->path('/var/log/mojo.log');
Log file path used by L</"handle">.
=head1 METHODS
L<Mojo::Log> inherits all methods from L<Mojo::EventEmitter> and implements
the following new ones.
=head2 new
my $log = Mojo::Log->new;
Construct a new L<Mojo::Log> object and subscribe to L</"message"> event with
default logger.
=head2 debug
$log = $log->debug('You screwed up, but that is ok.');
$log = $log->debug('All', 'cool!');
Log debug message.
=head2 error
$log = $log->error('You really screwed up this time.');
$log = $log->error('Wow', 'seriously!');
Log error message.
=head2 fatal
$log = $log->fatal('Its over...');
$log = $log->fatal('Bye', 'bye!');
Log fatal message.
=head2 format
my $msg = $log->format(debug => 'Hi there!');
my $msg = $log->format(debug => 'Hi', 'there!');
Format log message.
=head2 info
$log = $log->info('You are bad, but you prolly know already.');
$log = $log->info('Ok', 'then!');
Log info message.
=head2 is_level
my $bool = $log->is_level('debug');
Check log level.
=head2 is_debug
my $bool = $log->is_debug;
Check for debug log level.
=head2 is_error
my $bool = $log->is_error;
Check for error log level.
=head2 is_fatal
my $bool = $log->is_fatal;
Check for fatal log level.
=head2 is_info
my $bool = $log->is_info;
Check for info log level.
=head2 is_warn
my $bool = $log->is_warn;
Check for warn log level.
=head2 log
$log = $log->log(debug => 'This should work.');
$log = $log->log(debug => 'This', 'too!');
Emit L</"message"> event.
=head2 warn
$log = $log->warn('Dont do that Dave...');
$log = $log->warn('No', 'really!');
Log warn message.
=head1 SEE ALSO
L<Mojolicious>, L<Mojolicious::Guides>, L<http://mojolicio.us>.
=cut
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