[978a164] | 1 | use strict; |
---|
| 2 | use warnings; |
---|
| 3 | |
---|
| 4 | package BarnOwl::Logging; |
---|
| 5 | |
---|
| 6 | =head1 BarnOwl::Logging |
---|
| 7 | |
---|
| 8 | =head1 DESCRIPTION |
---|
| 9 | |
---|
| 10 | C<BarnOwl::Logging> implements the internals of logging. All customizations |
---|
| 11 | to logging should be done in the appropriate subclass of L<BarnOwl::Message>. |
---|
| 12 | |
---|
| 13 | =head2 USAGE |
---|
| 14 | |
---|
| 15 | Modules wishing to customize how messages are logged should override the |
---|
| 16 | relevant subroutines in the appropriate subclass of L<BarnOwl::Message>. |
---|
| 17 | |
---|
[18c1925] | 18 | Modules wishing to log errors sending outgoing messages should call |
---|
| 19 | L<BarnOwl::Logging::log_outgoing_error> with the message that failed |
---|
| 20 | to be sent. |
---|
| 21 | |
---|
[978a164] | 22 | =head2 EXPORTS |
---|
| 23 | |
---|
| 24 | None by default. |
---|
| 25 | |
---|
| 26 | =cut |
---|
| 27 | |
---|
| 28 | use Exporter; |
---|
| 29 | |
---|
| 30 | our @EXPORT_OK = qw(); |
---|
| 31 | |
---|
| 32 | our %EXPORT_TAGS = (all => [@EXPORT_OK]); |
---|
| 33 | |
---|
| 34 | use File::Spec; |
---|
| 35 | |
---|
[145cabe] | 36 | $BarnOwl::Hooks::newMessage->add("BarnOwl::Logging::log"); |
---|
[8190ce8] | 37 | $BarnOwl::Hooks::startup->add("BarnOwl::Logging::_register_variables"); |
---|
| 38 | |
---|
| 39 | sub _register_variables { |
---|
| 40 | BarnOwl::new_variable_bool('logging', |
---|
| 41 | { |
---|
| 42 | default => 0, |
---|
| 43 | summary => 'turn personal logging on or off', |
---|
| 44 | description => "If this is set to on, personal messages are\n" |
---|
| 45 | . "logged in the directory specified\n" |
---|
| 46 | . "by the 'logpath' variable. The filename in that\n" |
---|
| 47 | . "directory is derived from the sender of the message." |
---|
| 48 | }); |
---|
| 49 | |
---|
| 50 | BarnOwl::new_variable_bool('classlogging', |
---|
| 51 | { |
---|
| 52 | default => 0, |
---|
| 53 | summary => 'turn class logging on or off', |
---|
| 54 | description => "If this is set to on, class messages are\n" |
---|
| 55 | . "logged in the directory specified by the\n" |
---|
| 56 | . "'classpath' variable. The filename in that\n" |
---|
| 57 | . "directory is derived from the class to which\n" |
---|
| 58 | . "the message was sent." |
---|
| 59 | }); |
---|
| 60 | |
---|
| 61 | BarnOwl::new_variable_string('logfilter', |
---|
| 62 | { |
---|
| 63 | default => '', |
---|
| 64 | summary => 'name of a filter controlling which messages to log', |
---|
| 65 | description => "If non empty, any messages matching the given filter will be logged.\n" |
---|
| 66 | . "This is a completely separate mechanism from the other logging\n" |
---|
| 67 | . "variables like logging, classlogging, loglogins, loggingdirection,\n" |
---|
| 68 | . "etc. If you want this variable to control all logging, make sure\n" |
---|
| 69 | . "all other logging variables are in their default state." |
---|
| 70 | }); |
---|
| 71 | |
---|
| 72 | BarnOwl::new_variable_bool('loglogins', |
---|
| 73 | { |
---|
| 74 | default => 0, |
---|
| 75 | summary => 'enable logging of login notifications', |
---|
| 76 | description => "When this is enabled, BarnOwl will log login and logout notifications\n" |
---|
| 77 | . "for AIM, zephyr, or other protocols. If disabled BarnOwl will not print\n" |
---|
| 78 | . "login or logout notifications." |
---|
| 79 | }); |
---|
| 80 | } |
---|
[145cabe] | 81 | |
---|
[978a164] | 82 | =head2 sanitize_filename BASE_PATH FILENAME |
---|
| 83 | |
---|
| 84 | Sanitizes C<FILENAME> and concatenates it with C<BASE_PATH>. |
---|
| 85 | |
---|
| 86 | In any filename, C<"/"> and any control characters (characters which |
---|
| 87 | match C<[:cntrl:]> get replaced by underscores. If the resulting |
---|
| 88 | filename is empty or equal to C<"."> or C<"..">, it is replaced with |
---|
| 89 | C<"weird">. |
---|
| 90 | |
---|
| 91 | =cut |
---|
| 92 | |
---|
| 93 | sub sanitize_filename { |
---|
| 94 | my $base_path = BarnOwl::Internal::makepath(shift); |
---|
| 95 | my $filename = shift; |
---|
| 96 | $filename =~ s/[[:cntrl:]\/]/_/g; |
---|
| 97 | if ($filename eq '' || $filename eq '.' || $filename eq '..') { |
---|
| 98 | $filename = 'weird'; |
---|
| 99 | } |
---|
| 100 | # The original C code also removed characters less than '!' and |
---|
| 101 | # greater than or equal to '~', marked file names beginning with a |
---|
| 102 | # non-alphanumeric or non-ASCII character as 'weird', and rejected |
---|
| 103 | # filenames longer than 35 characters. |
---|
| 104 | return File::Spec->catfile($base_path, $filename); |
---|
| 105 | } |
---|
| 106 | |
---|
| 107 | =head2 get_filenames MESSAGE |
---|
| 108 | |
---|
| 109 | Returns a list of filenames in which to log the passed message. |
---|
| 110 | |
---|
| 111 | This method calls C<log_filenames> on C<MESSAGE> to determine the list |
---|
| 112 | of filenames to which C<MESSAGE> gets logged. All filenames are |
---|
| 113 | relative to C<MESSAGE->log_base_path>. If C<MESSAGE->log_to_all_file> |
---|
| 114 | returns true, then the filename C<"all"> is appended to the list of |
---|
| 115 | filenames. |
---|
| 116 | |
---|
| 117 | Filenames are sanitized by C<sanitize_filename>. |
---|
| 118 | |
---|
| 119 | =cut |
---|
| 120 | |
---|
| 121 | sub get_filenames { |
---|
| 122 | my ($m) = @_; |
---|
| 123 | my @filenames = $m->log_filenames; |
---|
| 124 | push @filenames, 'all' if $m->log_to_all_file; |
---|
| 125 | return map { sanitize_filename($m->log_base_path, $_) } @filenames; |
---|
| 126 | } |
---|
| 127 | |
---|
[18c1925] | 128 | =head2 should_log_message MESSAGE |
---|
| 129 | |
---|
| 130 | Determines whether or not the passed message should be logged. |
---|
| 131 | |
---|
| 132 | To customize the behavior of this method, override |
---|
| 133 | L<BarnOwl::Message::should_log>. |
---|
| 134 | |
---|
| 135 | =cut |
---|
| 136 | |
---|
| 137 | sub should_log_message { |
---|
| 138 | my ($m) = @_; |
---|
| 139 | # If there's a logfilter and this message matches it, log. |
---|
| 140 | # pass quiet=1, because we don't care if the filter doesn't exist |
---|
| 141 | return 1 if BarnOwl::message_matches_filter($m, BarnOwl::getvar('logfilter'), 1); |
---|
| 142 | # otherwise we do things based on the logging variables |
---|
| 143 | # skip login/logout messages if appropriate |
---|
| 144 | return 0 if $m->is_loginout && BarnOwl::getvar('loglogins') eq 'off'; |
---|
| 145 | # check direction |
---|
| 146 | return 0 if $m->is_outgoing && BarnOwl::getvar('loggingdirection') eq 'in'; |
---|
| 147 | return 0 if $m->is_incoming && BarnOwl::getvar('loggingdirection') eq 'out'; |
---|
| 148 | return $m->should_log; |
---|
| 149 | } |
---|
| 150 | |
---|
| 151 | =head2 log MESSAGE |
---|
| 152 | |
---|
| 153 | Call this method to (potentially) log a message. |
---|
| 154 | |
---|
| 155 | To customize the behavior of this method for your messages, override |
---|
| 156 | L<BarnOwl::Message::log>, L<BarnOwl::Message::should_log>, |
---|
| 157 | L<BarnOwl::Message::log_base_path>, and/or |
---|
| 158 | L<BarnOwl::Message::log_filenames>. |
---|
| 159 | |
---|
| 160 | =cut |
---|
| 161 | |
---|
| 162 | sub log { |
---|
| 163 | my ($m) = @_; |
---|
[145cabe] | 164 | return unless defined $m; |
---|
[18c1925] | 165 | return unless BarnOwl::Logging::should_log_message($m); |
---|
| 166 | my $log_text = $m->log; |
---|
| 167 | foreach my $filename (BarnOwl::Logging::get_filenames($m)) { |
---|
| 168 | BarnOwl::Logging::enqueue_text($log_text, $filename); |
---|
| 169 | } |
---|
| 170 | } |
---|
| 171 | |
---|
| 172 | =head2 log_outgoing_error MESSAGE |
---|
| 173 | |
---|
| 174 | Call this method to (potentially) log an error in sending an |
---|
| 175 | outgoing message. Errors get logged to the same file(s) as |
---|
| 176 | successful messages. |
---|
| 177 | |
---|
| 178 | To customize the behavior of this method for your messages, override |
---|
| 179 | L<BarnOwl::Message::log_outgoing_error>, |
---|
| 180 | L<BarnOwl::Message::should_log>, |
---|
| 181 | L<BarnOwl::Message::log_base_path>, and/or |
---|
| 182 | L<BarnOwl::Message::log_filenames>. |
---|
| 183 | |
---|
| 184 | =cut |
---|
| 185 | |
---|
| 186 | sub log_outgoing_error { |
---|
| 187 | my ($m) = @_; |
---|
| 188 | return unless BarnOwl::Logging::should_log_message($m); |
---|
| 189 | my $log_text = $m->log_outgoing_error; |
---|
| 190 | foreach my $filename (BarnOwl::Logging::get_filenames($m)) { |
---|
| 191 | BarnOwl::Logging::enqueue_text($log_text, $filename); |
---|
[978a164] | 192 | } |
---|
| 193 | } |
---|
| 194 | |
---|
| 195 | 1; |
---|