Muffler

Flexible log suppression for Ruby. Compatible with:

• Rails 3.x
• Rack
• Ruby 1.9.x

Just add it to your Gemfile:

gem 'muffler'

Works as drop-in replacement for Rails::Rack::Logger. Gemfile require is all that's needed.

Drop-in replacements are provided for Rack::CommonLogger and Rack::Logger. Just add them to your middleware stack.

use Muffler::Rack::CommonLogger
use Muffler::Rack::Logger

run MyApp

If not using Rack or Rails you can still muffle log output by manually calling the muffle method:

logger = Logger.new('app.log')

Muffler.muffle(logger) do
  # your custom code here
end

You can still take advantage of conditional muffling as well:

logger = Logger.new('app.log')

if Muffler.muffle?('REMOTE_ADDR' => '127.0.0.1')
  Muffler.muffle(logger) do
    # muffled code here
  end
else
  # unmuffled code
end

By default, Muffler muffles log output based on the request environment. It does comparisons against REMOTE_ADDR, PATH_INFO, and a custom header you can configure. The default header looked for is: HTTP_X_MUFFLE_LOGGER.

Note that when sending the abover header in the request it should be named X-Muffle-Logger or X-MUFFLE-LOGGER.

You can configure which IP addresses, request paths, and headers to look for:

Muffler.configure do |config|
  config.ips += ['10.1.1.3', '10.1.1.4']
  config.paths << %r{/assets}
  config.header = 'HTTP_X_MY_CUSTOM_HEADER'
end

You can also add your own "mufflers" or replace the defaults. Custom mufflers just need to return true (muffle log output) or false (don't muffle log output).

If still using Rack or Rails, you could add a params muffler:

Muffler.configure do |config|
  config.muffle_with :params do |env|
    request = Rack::Request.new(env)
    request.params['muffle'].to_i == 1
  end
end

Of if just working with Ruby you could clear the default filters and add your own:

Muffler.configure do |config|
  config.mufflers.clear # clear default mufflers
  config.muffle_with :random do |opts|
    [true, false].sample
  end
end

The default mufflers are:

• :header
• :ip
• :path

Pull requests are welcome. Just make sure to include tests!

To run tests, install some dependencies:

bundle install

Then, run tests with:

rake test

Or, If you want to check coverage:

COVERAGE=true rake test

Please use GitHub's issue tracker.

Jeremy Israelsen