69 lines
1.6 KiB
Elixir
69 lines
1.6 KiB
Elixir
defmodule Pleroma.Captcha do
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use GenServer
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@ets __MODULE__.Ets
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@ets_options [:ordered_set, :private, :named_table, {:read_concurrency, true}]
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@doc false
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def start_link() do
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GenServer.start_link(__MODULE__, [], name: __MODULE__)
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end
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@doc false
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def init(_) do
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@ets = :ets.new(@ets, @ets_options)
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{:ok, nil}
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end
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def new() do
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GenServer.call(__MODULE__, :new)
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end
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def validate(token, captcha) do
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GenServer.call(__MODULE__, {:validate, token, captcha})
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end
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@doc false
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def handle_call(:new, _from, state) do
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method = Pleroma.Config.get!([__MODULE__, :method])
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case method do
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__MODULE__.Kocaptcha ->
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endpoint = Pleroma.Config.get!([method, :endpoint])
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case HTTPoison.get(endpoint <> "/new") do
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{:error, _} ->
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%{error: "Kocaptcha service unavailable"}
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{:ok, res} ->
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json_resp = Poison.decode!(res.body)
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token = json_resp["token"]
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true = :ets.insert(@ets, {token, json_resp["md5"]})
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{
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:reply,
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%{type: :kocaptcha, token: token, url: endpoint <> json_resp["url"]},
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state
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}
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end
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end
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end
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@doc false
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def handle_call({:validate, token, captcha}, _from, state) do
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with false <- is_nil(captcha),
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[{^token, saved_md5}] <- :ets.lookup(@ets, token),
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true <- (:crypto.hash(:md5, captcha) |> Base.encode16) == String.upcase(saved_md5) do
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# Clear the saved value
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:ets.delete(@ets, token)
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{:reply, true, state}
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else
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e -> IO.inspect(e); {:reply, false, state}
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end
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end
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end
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