Launch this thingy 😅

.gitignore

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+/.bundle/
+/.yardoc
+/Gemfile.lock
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/
+*.bundle
+*.so
+*.o
+*.a
+mkmf.log

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in grape-middleware-logger.gemspec
+gemspec

LICENSE.txt

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+Copyright (c) 2015 Ryan Buckley
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# Grape::Middleware::Logger
+
+Dead until brought to life with the release of Grape v0.12.0
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'grape-middleware-logger'
+```
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install grape-middleware-logger
+
+## Usage
+    
+    class API < Grape::API
+      use Grape::Middleware::Logger
+    end
+    
+Using Grape with Rails? Add consistent logging and param filtering with
+
+    use Grape::Middleware::Logger, { 
+      logger: Rails.logger, 
+      filter: ActionDispatch::Http::ParameterFilter.new(Rails.application.config.filter_parameters)
+    }
+    
+## Credits
+
+Big thanks to jadent's question/answer on [stackoverflow](http://stackoverflow.com/questions/25048163/grape-using-error-and-grapemiddleware-after-callback)
+for easily logging error responses. Borrowed some motivation from the [grape_logging](https://github.com/aserafin/grape_logging) gem
+and would love to see these two consolidated at some point.
+
+## Contributing
+
+1. Fork it ( https://github.com/ridiculous/grape-middleware-logger/fork )
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Add some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create a new Pull Request

Rakefile

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+require "bundler/gem_tasks"
+

grape-middleware-logger.gemspec

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+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'grape/middleware/logger/version'
+
+Gem::Specification.new do |spec|
+  spec.name          = "grape-middleware-logger"
+  spec.version       = Grape::Middleware::Logger::VERSION
+  spec.authors       = ["Ryan Buckley"]
+  spec.email         = ["arebuckley@gmail.com"]
+  spec.summary       = %q{Logging middleware for Grape apps}
+  spec.description   = %q{Logging middleware for Grape apps, similar to what Rails offers}
+  spec.homepage      = ""
+  spec.license       = "MIT"
+
+  spec.files         = `git ls-files -z`.split("\x0")
+  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
+  spec.require_paths = ["lib"]
+
+  spec.add_dependency 'grape'
+
+  spec.add_development_dependency "bundler", "~> 1.7"
+  spec.add_development_dependency "rake", "~> 10.0"
+end

lib/grape/middleware/logger.rb

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+require 'grape/middleware/logger/version'
+require 'logger'
+
+module Grape
+  module Middleware
+    class Logger < Grape::Middleware::Globals
+
+      #
+      # Overrides
+      #
+
+      def before
+        @start_time = Time.now
+        super
+        logger.info ''
+        logger.info %Q(Started #{env['grape.request'].request_method} "#{env['grape.request'].path}")
+        logger.info %Q(  Parameters: #{parameters})
+      end
+
+      def after(status)
+        logger.info "Completed #{status} in #{((Time.now - @start_time) * 1000).round(2)}ms"
+        logger.info ''
+      end
+
+      def call!(env)
+        @env = env
+        before
+        error = catch(:error) { @app_response = @app.call(@env); nil }
+        if error
+          after_failure(error)
+          throw(:error, error)
+        else
+          after(@app_response.first)
+        end
+        @app_response
+      end
+
+      #
+      # Helpers
+      #
+
+      def after_failure(error)
+        logger.info %Q(  Error: #{error[:message]}) if error[:message]
+        after(error[:status])
+      end
+
+      def parameters
+        request_params = env['grape.request.params'].to_hash
+        request_params.merge!(env['action_dispatch.request.request_parameters'] || {})
+        filter_params(request_params)
+      end
+
+      def filter_params(params)
+        if @options[:filter]
+          @options[:filter].filter(params)
+        else
+          params
+        end
+      end
+
+      def logger
+        @logger ||= @options[:logger] || Logger.new(STDOUT)
+      end
+    end
+  end
+end

lib/grape/middleware/logger/version.rb

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+module Grape
+  module Middleware
+    class Logger
+      VERSION = '0.0.1'
+    end
+  end
+end