Marcel GrĂ¼nauer

NAME

PerlIO::via::ToFirePHP - log to FirePHP via an PerlIO layer

VERSION

version 1.100860

SYNOPSIS

    use PerlIO::via::ToFirePHP;
    my $fire_php = FirePHP::Dispatcher->new(HTTP::Headers->new);
    open my $fh, '>:via(ToFirePHP)', $fire_php;
    # Everything you print on the filehandle will be sent to FirePHP

DESCRIPTION

This PerlIO layer sends everything it receives to FirePHP. When constructing a filehandle using this layer using open(), you need to pass an object of type FirePHP::Dispatcher that has been initialized with a HTTP::Headers object.

A typical use of this PerlIO layer is to send DBI trace output to FirePHP:

    use PerlIO::via::ToFirePHP;

    my $dbh = DBI->connect(...);

    open my $fh, '>:via(ToFirePHP)',
        FirePHP::Dispatcher->new($http_headers_object);
    $dbh->trace(2, $fh);

Now the trace output of all calls to that database handle will be sent to FirePHP.

The PerlIO layer is implemented in PerlIO::via::ToFirePHP instead of just PerlIO::via::FirePHP because of a bug in PerlIO::via in perl 5.10.0 and earlier versions. If we used just PerlIO::via::FirePHP, we would not be able to use the shorthand layer notation of open my $fh, ':via(FirePHP), $fire_php>. PerlIO::via would look for a PUSHED method in package FirePHP. There is no such method, but because FirePHP::Dispatcher has been loaded, the namespace FirePHP has been autovivified. So PerlIO::via would stop looking. This bug seems to be fixed in perl 5.10.1.

METHODS

PUSHED

Called by PerlIO::via - read its documentation for details.

OPEN

Called by PerlIO::via - read its documentation for details.

WRITE

Called by PerlIO::via - read its documentation for details.

WRITE() accumulates input until a newline is seen, only then will it remove the newline and send the accumulated input to the FirePHP::Dispatcher object. The motivation for this was that DBI's trace() method reports trace output in chunks, not necessarily whole lines.

CLOSED

Called by PerlIO::via - read its documentation for details.

SEE ALSO

HTTP::Engine::FirePHP

The get_fire_php_fh() method it places in HTTP::Engine::Response returns a filehandle constructed with PerlIO::via::ToFirePHP.

PerlIO::via

See this module for how to implement PerlIO layers in Perl.

INSTALLATION

See perlmodinstall for information and options on installing Perl modules.

BUGS AND LIMITATIONS

No bugs have been reported.

Please report any bugs or feature requests through the web interface at http://rt.cpan.org/Public/Dist/Display.html?Name=PerlIO-via-ToFirePHP.

AVAILABILITY

The latest version of this module is available from the Comprehensive Perl Archive Network (CPAN). Visit http://www.perl.com/CPAN/ to find a CPAN site near you, or see http://search.cpan.org/dist/PerlIO-via-ToFirePHP/.

The development version lives at http://github.com/hanekomu/PerlIO-via-ToFirePHP/. Instead of sending patches, please fork this project using the standard git and github infrastructure.

AUTHOR

  Marcel Gruenauer <marcel@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2009 by Marcel Gruenauer.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.