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49 lines
1 KiB
Elixir
49 lines
1 KiB
Elixir
defmodule PhilomenaWeb.CaptchaPlug do
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alias Philomena.Captcha
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import Plug.Conn
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import Phoenix.Controller
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def init([]), do: false
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def call(conn, _opts) do
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user = conn |> Pow.Plug.current_user()
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conn
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|> maybe_check_captcha(user)
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end
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defp maybe_check_captcha(conn, nil) do
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case Captcha.valid_solution?(conn.params) do
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true ->
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conn
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false ->
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conn
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|> put_flash(
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:error,
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"There was an error verifying you're not a robot. Please try again."
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)
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|> do_failure_response(ajax?(conn))
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|> halt()
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end
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end
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defp maybe_check_captcha(conn, _user), do: conn
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defp do_failure_response(conn, true) do
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conn
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|> put_status(:multiple_choices)
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|> text("")
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end
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defp do_failure_response(conn, _false) do
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redirect(conn, external: conn.assigns.referrer)
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end
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def ajax?(conn) do
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case get_req_header(conn, "x-requested-with") do
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[value] -> String.downcase(value) == "xmlhttprequest"
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_ -> false
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end
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end
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end
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