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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Uploaders.S3 do
   6   @behaviour Pleroma.Uploaders.Uploader
   7   require Logger
   8
   9   # The file name is re-encoded with S3's constraints here to comply with previous
  10   # links with less strict filenames
  11   def get_file(file) do
  12     config = Pleroma.Config.get([__MODULE__])
  13     bucket = Keyword.fetch!(config, :bucket)
  14
  15     bucket_with_namespace =
  16       if namespace = Keyword.get(config, :bucket_namespace) do
  17         namespace <> ":" <> bucket
  18       else
  19         bucket
  20       end
  21
  22     {:ok,
  23      {:url,
  24       Path.join([
  25         Keyword.fetch!(config, :public_endpoint),
  26         bucket_with_namespace,
  27         strict_encode(URI.decode(file))
  28       ])}}
  29   end
  30
  31   def put_file(%Pleroma.Upload{} = upload) do
  32     config = Pleroma.Config.get([__MODULE__])
  33     bucket = Keyword.get(config, :bucket)
  34
  35     {:ok, file_data} = File.read(upload.tempfile)
  36
  37     s3_name = strict_encode(upload.path)
  38
  39     op =
  40       ExAws.S3.put_object(bucket, s3_name, file_data, [
  41         {:acl, :public_read},
  42         {:content_type, upload.content_type}
  43       ])
  44
  45     case ExAws.request(op) do
  46       {:ok, _} ->
  47         {:ok, {:file, s3_name}}
  48
  49       error ->
  50         Logger.error("#{__MODULE__}: #{inspect(error)}")
  51         {:error, "S3 Upload failed"}
  52     end
  53   end
  54
  55   @regex Regex.compile!("[^0-9a-zA-Z!.*/'()_-]")
  56   def strict_encode(name) do
  57     String.replace(name, @regex, "-")
  58   end
  59 end