How can I handle errors in Rails middleware?

How can I handle errors in Rails middleware?

In Rails, you can handle errors in middleware by rescuing exceptions in your middleware class. You can define a method like call and use a begin-rescue block to catch exceptions.

Can you show me a code example?

Sure! Here's a simple example:

class ErrorHandlingMiddleware
  def initialize(app)
    @app = app
  end

  def call(env)
    @app.call(env)
  rescue StandardError => e
    [500, { 'Content-Type' => 'text/plain' }, ['Internal Server Error']]
  end
end

What if I want to log the error as well?

You can log the error inside the rescue block. For example:

rescue StandardError => e
  Rails.logger.error(e.message)
  [500, { 'Content-Type' => 'text/plain' }, ['Internal Server Error']]
end

Is there a way to customize the error response?

Yes, you can customize the response by modifying the array returned in the rescue block. You can return JSON or HTML as needed.