HPACK RFC Binary sigil

sigil.ex

defmodule RFCBinaries do
  def sigil_b(string, []) do
    string
    |> String.split("\n")
    |> Enum.map(fn(part) -> String.split(part, "|") |> List.first end)
    |> Enum.map(fn(part) -> String.split(part, " ") end)
    |> List.flatten
    |> Enum.filter(&(byte_size(&1) > 0))
    |> Enum.map(fn(part) -> String.to_integer(part, 16) end)
    |> Enum.map(fn(i) -> << i::size(16) >> end)
    |> Enum.reduce(fn(b, acc) -> acc <> b  end)
  end
end

test.exs

test "Literal Header Field with Indexing", %{table: table} do
  hbf = ~b/
    400a 6375 7374 6f6d 2d6b 6579 0d63 7573 | @.custom-key.cus
    746f 6d2d 6865 6164 6572                | tom-header
  /

  [ decoded_header | _ ] = HPack.decode(hbf, table)
  assert decoded_header == { "custom-key", "custom-header" }
  assert HPack.Table.size(table) == 55
end