NAME

Plack::Middleware::TrafficLog - Log headers and body of HTTP traffic

SYNOPSIS

# In app.psgi
use Plack::Builder;

builder {
    enable "TrafficLog", with_body => 1;
};

DESCRIPTION

This middleware logs the request and response messages with detailed information about headers and body.

The example log:

[08/Aug/2012:16:59:47 +0200] [164836368] [127.0.0.1 -> 0:5000] [Request ]
|GET / HTTP/1.1|Connection: TE, close|Host: localhost:5000|TE: deflate,gzi
p;q=0.3|User-Agent: lwp-request/6.03 libwww-perl/6.03||
[08/Aug/2012:16:59:47 +0200] [164836368] [127.0.0.1 <- 0:5000] [Response]
|HTTP/1.0 200 OK|Content-Type: text/plain||Hello World

This module works also with applications which have delayed response. In that case each chunk is logged separately and shares the same unique ID number and headers.

The body of request and response is not logged by default. For streaming responses only first chunk is logged by default.

CONFIGURATION

logger

# traffic.l4p
log4perl.logger.traffic = DEBUG, LogfileTraffic
log4perl.appender.LogfileTraffic = Log::Log4perl::Appender::File
log4perl.appender.LogfileTraffic.filename = traffic.log
log4perl.appender.LogfileTraffic.layout = PatternLayout
log4perl.appender.LogfileTraffic.layout.ConversionPattern = %m{chomp}%n

# app.psgi
use Log::Log4perl qw(:levels get_logger);
Log::Log4perl->init('traffic.l4p');
my $logger = get_logger('traffic');

enable "Plack::Middleware::TrafficLog",
    logger => sub { $logger->log($INFO, join '', @_) };

Sets a callback to print log message to. It prints to psgi.errors output stream by default.

with_request

The false value disables logging of request message.

with_response

The false value disables logging of response message.

with_date

The false value disables logging of current date.

with_body

The true value enables logging of message's body.

with_all_chunks

The true value enables logging of every chunk for streaming responses.

eol

Sets the line separator for message's headers and body. The default value is the pipe character |.

body_eol

Sets the line separator for message's body only. The default is the space character . The default value is used only if eol is also undefined.

SEE ALSO

Plack, Plack::Middleware::AccessLog.

BUGS

This module has unstable API and it can be changed in future.

The log file can contain the binary data if the PSGI server provides binary files.

If you find the bug or want to implement new features, please report it at http://github.com/dex4er/perl-Plack-Middleware-TrafficLog/issues

The code repository is available at http://github.com/dex4er/perl-Plack-Middleware-TrafficLog

AUTHOR

Piotr Roszatycki <dexter@cpan.org>

LICENSE

Copyright (c) 2012, 2014 Piotr Roszatycki <dexter@cpan.org>.

This is free software; you can redistribute it and/or modify it under the same terms as perl itself.

See http://dev.perl.org/licenses/artistic.html