gistfile1.rb

module CouchRest
  class Logger 
        
    def initialize(app, db=nil)
      @app = app
      @db = db
    end
 
    def call(env)
      log['started_at'] = Time.now
      log['env'] = env
      log['url'] = 'http://' + env['HTTP_HOST'] + env['REQUEST_URI'] 
      response = @app.call(env)
      log['ended_at'] = Time.now
      log['duration'] = log['ended_at'] - log['started_at']
      # let's report the log in a different thread so we don't slow down the app
      @db ? Thread.new(@db, log){|db, rlog| db.save_doc(rlog);} : p(log.inspect)
      response
    end
  end
end

# in your app (i.e: rack.rb)
#
# define a database to log our requests
couch = CouchRest.new("http://mattetti.couch.io")
LOG_DB = couch.database!('couchrest-logger')   

use CouchRest::Logger, LOG_DB