使用Elixir中的Acr将文件上载到本地

我用的是弧。定义( https://github.com/stavro/arc )用于将图像上载到本地存储。

我的文件\ u service.ex如下:

defmodule MyApp.FileService do
  use Arc.Definition
  use Arc.Ecto.Definition

  @image_types ~w(.jpg .jpeg .png .gif)
  @versions [:original]
  @default_filename "image.png"

  @heights %{
    medium: 400
  }

  @widths %{
    medium: 400
  }

  def __storage, do: Arc.Storage.Local

  def upload_image(%Plug.Upload{} = image, resource_type, resource_id) do
    store({%Plug.Upload{path: image.path, filename: @default_filename},
      %{resource_type: resource_type, resource_id: resource_id}})
  end

  def upload_base64_image(base64_image, resource_type, resource_id) do
    store({%{filename: @default_filename, binary: base64_image_to_binary(base64_image)}})
  end 

  def delete_file(image_url, resource) do
    delete({image_url, resource})
  end

  defp base64_image_to_binary("data:image/" <> rest) do
    rest
    |> String.replace("\n", "")
    |> String.split(",")
    |> Enum.at(1)
    |> Base.decode64!
  end
  defp base64_image_to_binary(base64_image) do
    base64_image
    |> String.replace("\n", "")
    |> Base.decode64!
  end
end

(arc)lib/arc/actions/store.ex:8:arc.actions.store.store(MyApp.FileService,{%{binary:<&书信电报;255, 216, 255, 225, 3, 48, 69, 120, 105, 102, 0, 0, 73, 73, 42, 0, 8, 0, 0, 0, 58, 0, 50, 1, 2, 0, 20, 0, 0, 0, 198, 2, 0, 0, 15, 1, 2, 0, 10, 0, 0, 0,218,2,0,0,1,1,…>>,文件名:“image.png”})

任何人,请帮忙?