Maxwell middleware for adding x-request-id to outgoing requests.

It takes the :request_id property from the Logger metadata and passes it on under the x-request-id header in outgoing http requests made through maxwell.

Add maxwell_request_id to your list of dependencies in mix.exs:

def deps do
  [{:maxwell_request_id, "~> 0.2"}]
end

defmodule MyClient do
  use Maxwell.Builder, ~w(get)a

  middleware MaxwellRequestId.Middleware

  def my_request_with_request_id(path) do
    path
    |> new()
    |> get()
  end
end

When adding the middleware, you can specify the name of the header to use for outgoing requests:

middleware MaxwellRequestId.Middleware, [header_name: "x-transaction-id"]