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ensure_authenticated.ex
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ensure_authenticated.ex
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defmodule ExOauth2Provider.Plug.EnsureAuthenticated do
@moduledoc """
This plug ensures that the request has been authenticated with an access token.
If one is not found, the `unauthenticated/2` function is invoked with the
`Plug.Conn.t` object and its params.
## Example
# Will call the unauthenticated/2 function on your handler
plug ExOauth2Provider.Plug.EnsureAuthenticated, handler: SomeModule
# look in the :secret location. You can also do simple claim checks:
plug ExOauth2Provider.Plug.EnsureAuthenticated, handler: SomeModule, key: :secret
plug ExOauth2Provider.Plug.EnsureAuthenticated, handler: SomeModule, typ: "access"
If the handler option is not passed, `ExOauth2Provider.Plug.ErrorHandler` will provide
the default behavior.
"""
alias Plug.Conn
alias ExOauth2Provider.Plug
@doc false
@spec init(keyword()) :: keyword()
def init(opts), do: opts
@doc false
@spec call(Conn.t(), keyword()) :: map()
def call(conn, opts) do
key = Keyword.get(opts, :key, :default)
conn
|> Plug.get_current_access_token(key)
|> handle_authentication(conn, opts)
end
defp handle_authentication({:ok, _}, conn, _opts), do: conn
defp handle_authentication({:error, reason}, %{params: params} = conn, opts) do
params = Map.put(params, :reason, reason)
module = Keyword.get(opts, :handler, ExOauth2Provider.Plug.ErrorHandler)
conn
|> Conn.assign(:ex_oauth2_provider_failure, reason)
|> Conn.halt()
|> module.unauthenticated(params)
end
end