Bugsnag Notifier for Ruby ========================= The Bugsnag Notifier for Ruby gives you instant notification of exceptions thrown from your **Rails**, **Sinatra**, **Rack** or **plain Ruby** app. Any uncaught exceptions will trigger a notification to be sent to your Bugsnag project. [Bugsnag](http://bugsnag.com) captures errors in real-time from your web, mobile and desktop applications, helping you to understand and resolve them as fast as possible. [Create a free account](http://bugsnag.com) to start capturing exceptions from your applications. Contents -------- - [How to Install](#how-to-install) - [Sending Custom Data With Exceptions](#sending-custom-data-with-exceptions) - [Sending Non-Fatal Exceptions](#sending-non-fatal-exceptions) - [Configuration](#configuration) - [Bugsnag Middleware](#bugsnag-middleware) - [Deploy Tracking](#deploy-tracking) - [EventMachine Apps](#eventmachine-apps) How to Install -------------- 1. Add the `bugsnag` gem to your `Gemfile` ```ruby gem "bugsnag" ``` 2. Install the gem ```shell bundle install ``` 3. Configure the Bugsnag module with your API key. In rails apps, put this code to a new file at `config/initializers/bugsnag.rb` ```ruby Bugsnag.configure do |config| config.api_key = "YOUR_API_KEY_HERE" end ``` 4. **Rack/Sinatra apps only**: Activate the Bugsnag Rack middleware ```ruby use Bugsnag::Rack ``` Sending Custom Data With Exceptions ----------------------------------- It is often useful to send additional meta-data about your app, such as information about the currently logged in user, along with any exceptions, to help debug problems. ### Rails Apps In any rails controller you can define a `before_bugsnag_notify` callback, which allows you to add this additional data by calling `add_tab` on the exception notification object. ```ruby class MyController < ApplicationController # Define the filter before_bugsnag_notify :add_user_info_to_bugsnag # Your controller code here private def add_user_info_to_bugsnag(notif) # Add some app-specific data which will be displayed on a custom # "User Info" tab on each error page on bugsnag.com notif.add_tab(:user_info, { name: current_user.name }) end end ``` ### Other Ruby Apps In other ruby apps, you can provide lambda functions to execute before any `Bugsnag.notify` calls as follows. Don't forget to clear the callbacks at the end of each request or session. ```ruby # Set a before notify callback Bugsnag.before_notify_callbacks << lambda {|notif| notif.add_tab(:user_info, { name: current_user.name }) } # Your app code here # Clear the callbacks Bugsnag.before_notify_callbacks.clear ``` You can read more about how callbacks work in the [Bugsnag Middleware](#bugsnag-middleware) documentation below. Sending Non-Fatal Exceptions ---------------------------- If you would like to send non-fatal exceptions to Bugsnag, you can call `Bugsnag.notify`: ```ruby Bugsnag.notify(RuntimeError.new("Something broke")) ``` You can also send additional meta-data with your exception: ```ruby Bugsnag.notify(RuntimeError.new("Something broke"), { :username => "bob-hoskins", :registered_user => true }) ``` Configuration ------------- To configure additional Bugsnag settings, use the block syntax and set any settings you need on the `config` block variable. For example: ```ruby Bugsnag.configure do |config| config.api_key = "your-api-key-here" config.use_ssl = true config.notify_release_stages = ["production", "development"] end ``` ###api_key Your Bugsnag API key (required). ```ruby config.api_key = "your-api-key-here" ``` ###release_stage If you would like to distinguish between errors that happen in different stages of the application release process (development, production, etc) you can set the `release_stage` that is reported to Bugsnag. ```ruby config.release_stage = "development" ``` In rails apps this value is automatically set from `RAILS_ENV`, and in rack apps it is automatically set to `RACK_ENV`. Otherwise the default is "production". ###notify_release_stages By default, we will only notify Bugsnag of exceptions that happen when your `release_stage` is set to be "production". If you would like to change which release stages notify Bugsnag of exceptions you can set `notify_release_stages`: ```ruby config.notify_release_stages = ["production", "development"] ``` ###auto_notify By default, we will automatically notify Bugsnag of any fatal exceptions in your application. If you want to stop this from happening, you can set `auto_notify`: ```ruby config.auto_notify = false ``` ###use_ssl Enforces all communication with bugsnag.com be made via ssl. ```ruby config.use_ssl = true ``` By default, `use_ssl` is set to false. ###project_root We mark stacktrace lines as `inProject` if they come from files inside your `project_root`. In rails apps this value is automatically set to `RAILS_ROOT`, otherwise you should set it manually: ```ruby config.project_root = "/var/www/myproject" ``` ###app_version If you want to track which versions of your application each exception happens in, you can set `app_version`. This is set to `nil` by default. ```ruby config.app_version = "2.5.1" ``` ###params_filters Sets the strings to filter out from the `params` hashes before sending them to Bugsnag. Use this if you want to ensure you don't send sensitive data such as passwords, and credit card numbers to our servers. Any keys which contain these strings will be filtered. ```ruby config.params_filters << "credit_card_number" ``` By default, `params_filters` is set to `["password", "password_confirmation"]` ###ignore_classes Sets for which exception classes we should not send exceptions to bugsnag.com. ```ruby config.ignore_classes << "ActiveRecord::StatementInvalid" ``` You can also provide a lambda function here to ignore by other exception attributes or by a regex: ```ruby config.ignore_classes << lambda {|ex| ex.message =~ /timeout/} ``` By default, `ignore_classes` contains the following: ```ruby [ "ActiveRecord::RecordNotFound", "ActionController::RoutingError", "ActionController::InvalidAuthenticityToken", "CGI::Session::CookieStore::TamperedWithCookie", "ActionController::UnknownAction", "AbstractController::ActionNotFound" ] ``` ###logger Sets which logger to use for Bugsnag log messages. In rails apps, this is automatically set to use `Rails.logger`, otherwise it will be set to `Logger.new(STDOUT)`. ###middleware Provides access to the middleware stack, see the [Bugsnag Middleware](#bugsnag-middleware) section below for details. Bugsnag Middleware ------------------ The Bugsnag Notifier for Ruby provides its own middleware system, similar to the one used in Rack applications. Middleware allows you to execute code before and after an exception is sent to bugsnag.com, so you can do things such as: - Send application-specific information along with exceptions, eg. the name of the currently logged in user, - Write exception information to your internal logging system. To make your own middleware, create a class that looks like this: ```ruby class MyMiddleware def initialize(bugsnag) @bugsnag = bugsnag end def call(notification) # Your custom "before notify" code @bugsnag.call(notification) # Your custom "after notify" code end end ``` You can then add your middleware to the middleware stack as follows: ```ruby Bugsnag.configure do |config| config.middleware.use MyMiddleware end ``` You can also view the order of the currently activated middleware by running `rake bugsnag:middleware`. Check out Bugsnag's [built in middleware classes](https://github.com/bugsnag/bugsnag-ruby/tree/master/lib/bugsnag/middleware) for some real examples of middleware in action. Deploy Tracking --------------- Bugsnag allows you to track deploys of your apps. By sending the source revision or application version to bugsnag.com when you deploy a new version of your app, you'll be able to see which deploy each error was introduced in. ### Using Capistrano If you use [capistrano](https://github.com/capistrano/capistrano) to deploy your apps, you can enable deploy tracking by adding the following line to your app's `deploy.rb`: ```ruby require "bugsnag/capistrano" ``` ### Using Rake If you aren't using capistrano, you can run the following rake command from your deploy scripts. ```shell rake bugsnag:deploy BUGSNAG_REVISION=source-control-revision BUGSNAG_RELEASE_STAGE=production ``` The bugsnag rake tasks will be automatically available for Rails 3 apps, to make the rake tasks available in other apps, add the following to your `Rakefile`: ```ruby require "bugsnag/tasks" ``` ### Configuring Deploy Tracking You can set the following environmental variables to override or specify additional deploy information: - **BUGSNAG_RELEASE_STAGE** - The release stage (eg, production, staging) currently being deployed. This is set automatically from your Bugsnag settings or rails/rack environment. - **BUGSNAG_API_KEY** - Your Bugsnag API key. This is set automatically from your Bugsnag settings in your app. - **BUGSNAG_REPOSITORY** - The repository from which you are deploying the code. This is set automatically if you are using capistrano. - **BUGSNAG_BRANCH** - The source control branch from which you are deploying the code. This is set automatically if you are using capistrano. - **BUGSNAG_REVISION** - The source control revision for the code you are currently deploying. This is set automatically if you are using capistrano. - **BUGSNAG_APP_VERSION** - The app version of the code you are currently deploying. Only set this if you tag your releases with [semantic version numbers](http://semver.org/) and deploy infrequently. For more information, check out the [deploy tracking api](https://bugsnag.com/docs/deploy-tracking-api) documentation. ### EventMachine Apps If your app uses [EventMachine](http://rubyeventmachine.com/) you'll need to manually notify Bugsnag of errors. There are two ways to do this in your EventMachine apps, first you should implement `EventMachine.error_handler`: ```ruby EventMachine.error_handler{|e| Bugsnag.notify(e) } ``` If you want more fine-grained error handling, you can use the [errback](http://eventmachine.rubyforge.org/EventMachine/Deferrable.html#errback-instance_method) function, for example: ```ruby EventMachine::run do server = EventMachine::start_server('0.0.0.0', PORT, MyServer) server.errback { Bugsnag.notify(RuntimeError.new("Something bad happened")) } end ``` For this to work, include [Deferrable](http://eventmachine.rubyforge.org/EventMachine/Deferrable.html) in your `MyServer`, then whenever you want to raise an error, call `fail`. Reporting Bugs or Feature Requests ---------------------------------- Please report any bugs or feature requests on the github issues page for this project here: Contributing ------------ - [Fork](https://help.github.com/articles/fork-a-repo) the [notifier on github](https://github.com/bugsnag/bugsnag-ruby) - Commit and push until you are happy with your contribution - Run the tests with `rake spec` and make sure they all pass - [Make a pull request](https://help.github.com/articles/using-pull-requests) - Thanks! Build Status ------------ [![Build Status](https://secure.travis-ci.org/bugsnag/bugsnag-ruby.png)](http://travis-ci.org/bugsnag/bugsnag-ruby) License ------- The Bugsnag ruby notifier is free software released under the MIT License. See [LICENSE.txt](https://github.com/bugsnag/bugsnag-ruby/blob/master/LICENSE.txt) for details.