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Courier::Filter::Logger::File(3pm) User Contributed Perl Documentation Courier::Filter::Logger::File(3pm)


Courier::Filter::Logger::File - File logger for the Courier::Filter framework


    use Courier::Filter::Logger::File;
    my $logger = Courier::Filter::Logger::File->new(
        file_name => $file_name
    # For use in an individual filter module:
    my $module = Courier::Filter::Module::My->new(
        logger => $logger,
    # For use as a global Courier::Filter logger object:
    my $filter = Courier::Filter->new(
        logger => $logger,


This class is a file logger class for use with Courier::Filter and its filter modules. It is derived from Courier::Filter::Logger::IOHandle.


The following constructor is provided:

Creates a new logger that logs messages as lines to a file. Opens the file for writing, creating it if necessary.

%options is a list of key/value pairs representing any of the following options:

Required. The name of the file to which log messages should be written.
A boolean value controlling whether every log message line should be prefixed with a timestamp (in local time, in ISO format). Defaults to false.

Instance methods

The following instance methods are provided, as inherited from Courier::Filter::Logger::IOHandle:

Logs the error message given as $text (a string which may contain newlines). Prefixes each line with a timestamp if the "timestamp" option has been set through the constructor.
Logs the Courier::Message given as $message as having been rejected due to $reason (a string which may contain newlines).


Courier::Filter::Logger::IOHandle, Courier::Filter::Logger, Courier::Filter::Overview.

For AVAILABILITY, SUPPORT, and LICENSE information, see Courier::Filter::Overview.


Julian Mehnle <>

2022-10-21 perl v5.34.0