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🌲 Great Elixir Logging Made Easy. Official Timber.io Integration.
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lib/timber/events/http_response_event.ex
defmodule Timber.Events.HTTPResponseEvent do
@moduledoc """
The HTTP response event tracks outgoing HTTP responses.
Timber can automatically track response events if you
use a `Plug` based framework through `Timber.Plug`.
"""
@behaviour Timber.Event
@type t :: %__MODULE__{
bytes: non_neg_integer,
headers: headers,
status: pos_integer,
time_ms: non_neg_integer
}
@type headers :: %{
cache_control: String.t,
content_disposition: String.t,
content_length: non_neg_integer,
content_type: String.t,
location: String.t
}
defstruct [:bytes, :headers, :status, :time_ms]
@recognized_headers ~w(
cache_control
content_disposition
content_length
content_type
location
)
def new(opts) do
struct(__MODULE__, opts)
end
@spec message(t) :: IO.chardata
def message(%__MODULE__{status: status, time_ms: time_ms}),
do: "Sent #{status} in #{time_ms}ms"
@doc """
Takes a list of two-element tuples representing HTTP response headers and
returns a map of the recognized headers Timber handles
"""
@spec headers_from_list([{String.t, String.t}]) :: headers
def headers_from_list(headers) do
Enum.filter_map(headers, &header_filter/1, &header_to_keyword/1)
|> Enum.into(%{})
end
@spec headers_from_list({String.t, String.t}) :: boolean
defp header_filter({name, _}) when name in @recognized_headers, do: true
defp header_filter(_), do: false
@spec header_to_keyword({String.t, String.t}) :: {atom, String.t}
defp header_to_keyword({name, value}), do: {String.to_existing_atom(name), value}
end