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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2020 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   alias Pleroma.Config
  10
  11   # The file name is re-encoded with S3's constraints here to comply with previous
  12   # links with less strict filenames
  13   @impl true
  14   def get_file(file) do
  15     {:ok,
  16      {:url,
  17       Path.join([
  18         Pleroma.Upload.base_url(),
  19         strict_encode(URI.decode(file))
  20       ])}}
  21   end
  22
  23   @impl true
  24   def put_file(%Pleroma.Upload{} = upload) do
  25     config = Config.get([__MODULE__])
  26     bucket = Keyword.get(config, :bucket)
  27     streaming = Keyword.get(config, :streaming_enabled)
  28
  29     s3_name = strict_encode(upload.path)
  30
  31     op =
  32       if streaming do
  33         op =
  34           upload.tempfile
  35           |> ExAws.S3.Upload.stream_file()
  36           |> ExAws.S3.upload(bucket, s3_name, [
  37             {:acl, :public_read},
  38             {:content_type, upload.content_type}
  39           ])
  40
  41         if Application.get_env(:tesla, :adapter) == Tesla.Adapter.Gun do
  42           # set s3 upload timeout to respect :upload pool timeout
  43           # timeout should be slightly larger, so s3 can retry upload on fail
  44           timeout = Pleroma.HTTP.AdapterHelper.Gun.pool_timeout(:upload) + 1_000
  45           opts = Keyword.put(op.opts, :timeout, timeout)
  46           Map.put(op, :opts, opts)
  47         else
  48           op
  49         end
  50       else
  51         {:ok, file_data} = File.read(upload.tempfile)
  52
  53         ExAws.S3.put_object(bucket, s3_name, file_data, [
  54           {:acl, :public_read},
  55           {:content_type, upload.content_type}
  56         ])
  57       end
  58
  59     case ExAws.request(op) do
  60       {:ok, _} ->
  61         {:ok, {:file, s3_name}}
  62
  63       error ->
  64         Logger.error("#{__MODULE__}: #{inspect(error)}")
  65         {:error, "S3 Upload failed"}
  66     end
  67   end
  68
  69   @impl true
  70   def delete_file(file) do
  71     [__MODULE__, :bucket]
  72     |> Config.get()
  73     |> ExAws.S3.delete_object(file)
  74     |> ExAws.request()
  75     |> case do
  76       {:ok, %{status_code: 204}} -> :ok
  77       error -> {:error, inspect(error)}
  78     end
  79   end
  80
  81   @regex Regex.compile!("[^0-9a-zA-Z!.*/'()_-]")
  82   def strict_encode(name) do
  83     String.replace(name, @regex, "-")
  84   end
  85 end