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plug_image_processing

0.0.1
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Plug to process images on-the-fly using libvips

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plug_image_processing lib plug_image_processing middlewares allowed_origins.ex
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lib/plug_image_processing/middlewares/allowed_origins.ex 

defmodule PlugImageProcessing.Middlewares.AllowedOrigins do

  defstruct config: nil



  defimpl PlugImageProcessing.Middleware do

    require Logger



    import Plug.Conn



    def enabled?(middleware, conn) do

      not is_nil(conn.params["url"]) and is_list(middleware.config.allowed_origins)

    end



    def run(middleware, conn) do

      origins = middleware.config.allowed_origins



      uri = URI.parse(conn.params["url"])



      if uri.host in origins do

        conn

      else

        Logger.error("[PlugImageProcessing] - Unallowed origins. Got: #{inspect(uri.host)}, expected one of: #{inspect(origins)}")



        conn

        |> send_resp(403, "unallowed origin")

        |> halt()

      end

    end

  end

end