HerokuRequestId

Heroku will add a unique request ID to every request if you enable the feature:

heroku labs:enable http-request-id

Heroku stores the ID in their own HTTP header named Heroku-Request-ID. Rails also supports the idea of a request ID, but it uses an X-Request-ID header instead.

This middleware jumps in the stack as early as it can and inserts Heroku's request ID as X-Request-ID if it exists. That's all.

Installation

Add this line to your application's Gemfile:

gem 'heroku_request_id'

Usage

The most practical way to use this would be to add uuid to Rails's TaggedLogger:

# config/environments/development.rb
config.log_tags = [:uuid]

This will allow you to correlate app log lines with Heroku router lines.

Keep in mind the middleware is inserted as early as possible into the stack; this means you can use it in other middlewares as well.

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