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messenger_bot

1.2.0
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Unofficial Facebook Messenger Platform chatbot client and webhook handler

Retired package: Deprecated
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messenger_bot lib messenger_bot web plugs transaction.ex
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lib/messenger_bot/web/plugs/transaction.ex 

defmodule MessengerBot.Web.Plug.Transaction do

  @moduledoc false



  ############################################################################

  # Plug implementation to add unique transaction identifier to each requests#

  ############################################################################



  alias MessengerBot.Util.String, as: StringUtil

  alias Plug.Conn



  @behaviour Plug



  @doc false

  def init(opts) do

    opts

  end



  @doc false

  def call(conn, _opts) do

    tx_id = Conn.get_req_header(conn, "x-request-id")

    tx_id = if Enum.empty?(tx_id), do: unique_id(), else: List.first(tx_id)

    Conn.put_private(conn, :tx_id, tx_id)

  end



  defp unique_id do

    StringUtil.unique_id()

  end

end