40 lines
955 B
Elixir
40 lines
955 B
Elixir
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defmodule Farmbot.Jwt do
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@moduledoc "Functions for dealing with the Farmbot JSON Web Token"
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defstruct [
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:bot,
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:exp,
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:iss,
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:mqtt,
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:os_update_server,
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]
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@typedoc "Type def for Farmbot Web Token."
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@type t :: %__MODULE__{
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bot: binary,
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exp: number,
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iss: binary,
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mqtt: binary,
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os_update_server: binary,
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}
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@doc "Decode a token."
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@spec decode(binary) :: {:ok, t} | {:error, term}
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def decode(tkn) do
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body = tkn |> String.split(".") |> Enum.at(1)
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with {:ok, json} <- Base.decode64(body, padding: false),
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{:ok, jwt} <- Poison.decode(json, as: %__MODULE__{}),
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do: {:ok, jwt}
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end
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@doc "Decodes a token, raises if it fails."
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@spec decode!(binary) :: t | no_return
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def decode!(tkn) do
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case decode(tkn) do
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{:ok, tkn} -> tkn
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:error -> raise "Failed to base64 decode."
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{:error, {:invalid, _char, _pos}} -> raise "Failed to json decode."
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end
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end
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end
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