ExceptionsApp

exceptions_app is a gem, that provides a simple way of handling exceptions in Rails applications. It changes the default PublicExceptions rack middleware to SimpleResponse. It adds a Rake task "rake gen:static_pages" that generates static pages for your custom exceptions.

Installation

Add this line to your application's Gemfile:

gem 'exceptions_app'

And then execute:

$ bundle

Or install it yourself as:

$ gem install exceptions_app

Usage

Configuring

ExceptionsApp have method configure, that yelds block inside itself. You can change the behaviour by adding this code to initializers/exceptions_app.rb

ExceptionsApp.configure do |config|
  config.envs = ["production", "another_production"]
  config.errors_path = ["/404"]
  config.statics_path = "path_for_statc"
end

There are several options that can be changed in initializer:

• envs - Array of environments in which default exceptions_app should be changed to gem's middleware
• errors_path - Array of route paths from which custom errors pages will be generated
• statics_path - String path (directory) where to put generated static pages

Preparations

ExceptionsApp is a simple Railtie that changes default exceptions_app in environments, mentioned in envs config option, to SimpleResponse rack middleware. So, to generate correct static error pages you should make custom error pages by yourself. It will be a great idea to make your own ErrorsController to handle exceptions and generate errors pages. The example of such controller you can see in features directory with cucumber integration tests.

How to work with it

ExceptionsApp is ready to use after bundle install. It has default config options, so if you won't change them and won't provide any custom pages it will by default generate static error pages from default Rails 404, 500 and 422 html pages in public directory. In fact it won't change application's behaviour if you won't configure it. Default config options are:

ExceptionsApp.config.envs = ["production"]
ExceptionsApp.config.errors_path = ["/404", "/500", "/422"]
ExceptionsApp.config.statics_path = "public"

Contributing

1. Fork it
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 new Pull Request