Plugsnag

Report errors in your Plug stack or whatever to Bugsnag, because that's a super great place to send your errors.

Installation/Usage

Just throw it in your deps in your mix.exs:

  defp deps do
    [{:plugsnag, "~> 1.4.0"}]
  end

Then you'll need to configure it with your API key as per the bugsnag-elixir docs.

To use the plug, use it in your router. For example in an Phoenix app:

defmodule YourApp.Router do
  use Phoenix.Router
  use Plugsnag

  # ...
end

If you want to define your own handle_errors functions using Plug.ErrorHandler, then you can call Plugsnag.handle_errors/{2,3} directly.

defmodule YourApp.Router do
  use Phoenix.Router
  use Plug.ErrorHandler
  # ...
  defp handle_errors(conn, assigns) do
    Plugsnag.handle_errors(conn, assigns)
    # do your own handling
  end
end

Filtering Parameters and Headers

By default, the BasicErrorReportBuilder will filter out password parameters from error reports sent to Bugsnag. You can customize this list inside your configuration:

config :plugsnag, filter: [params: ~w(password password_confirmation super_sekrit), headers: []]

Customizing error reporting

You can also customize how an error is sent to bugsnag-elixir by passing your own custom ErrorReportBuilder with the :error_report_builder option.

defmodule YourApp.Router do
  use Phoenix.Router
  use Plugsnag, error_report_builder: YourApp.ErrorReportBuilder

  # ...
end

defmodule YourApp.ErrorReportBuilder do
  @behaviour Plugsnag.ErrorReportBuilder

  def build_error_report(error_report, conn) do
    error_report
    |> Plugsnag.BasicErrorReportBuilder.build_error_report(conn)
    |> put_user_info(conn)
  end

  defp put_user_info(error_report, conn) do
    current_user = conn.assigns[:current_user]

    user_info =  %{
      id: current_user.id
    }

    %{error_report | user: user_info}
  end
end