git.squeep.com Git - akkoma/blob - lib/pleroma/upload.ex

   1 defmodule Pleroma.Upload do
   2   alias Ecto.UUID
   3
   4   def store(%Plug.Upload{} = file, should_dedupe) do
   5     settings = Application.get_env(:pleroma, Pleroma.Upload)
   6     storage_backend = Keyword.fetch!(settings, :storage_backend)
   7
   8     content_type = get_content_type(file.path)
   9     uuid = get_uuid(file, should_dedupe)
  10     name = get_name(file, uuid, content_type, should_dedupe)
  11
  12     strip_exif_data(content_type, file.path)
  13
  14     url_path = storage_backend.put_file(name, uuid, content_type)
  15
  16     %{
  17       "type" => "Document",
  18       "url" => [
  19         %{
  20           "type" => "Link",
  21           "mediaType" => content_type,
  22           "href" => url_path
  23         }
  24       ],
  25       "name" => name
  26     }
  27   end
  28   """
  29   # XXX: does this code actually work?  i am skeptical.  --kaniini
  30   def store(%{"img" => "data:image/" <> image_data}, should_dedupe) do
  31     settings = Application.get_env(:pleroma, Pleroma.Upload)
  32     use_s3 = Keyword.fetch!(settings, :use_s3)
  33
  34     parsed = Regex.named_captures(~r/(?<filetype>jpeg|png|gif);base64,(?<data>.*)/, image_data)
  35     data = Base.decode64!(parsed["data"], ignore: :whitespace)
  36     uuid = UUID.generate()
  37     uuidpath = Path.join(upload_path(), uuid)
  38     uuid = UUID.generate()
  39
  40     File.mkdir_p!(upload_path())
  41
  42     File.write!(uuidpath, data)
  43
  44     content_type = get_content_type(uuidpath)
  45
  46     name =
  47       create_name(
  48         String.downcase(Base.encode16(:crypto.hash(:sha256, data))),
  49         parsed["filetype"],
  50         content_type
  51       )
  52
  53     upload_folder = get_upload_path(uuid, should_dedupe)
  54     url_path = get_url(name, uuid, should_dedupe)
  55
  56     File.mkdir_p!(upload_folder)
  57     result_file = Path.join(upload_folder, name)
  58
  59     if should_dedupe do
  60       if !File.exists?(result_file) do
  61         File.rename(uuidpath, result_file)
  62       else
  63         File.rm!(uuidpath)
  64       end
  65     else
  66       File.rename(uuidpath, result_file)
  67     end
  68
  69     strip_exif_data(content_type, result_file)
  70
  71     url_path =
  72       if use_s3 do
  73         put_s3_file(name, uuid, result_file, content_type)
  74       else
  75         url_path
  76       end
  77
  78     %{
  79       "type" => "Image",
  80       "url" => [
  81         %{
  82           "type" => "Link",
  83           "mediaType" => content_type,
  84           "href" => url_path
  85         }
  86       ],
  87       "name" => name
  88     }
  89   end
  90   """
  91
  92   def strip_exif_data(content_type, file) do
  93     settings = Application.get_env(:pleroma, Pleroma.Upload)
  94     do_strip = Keyword.fetch!(settings, :strip_exif)
  95     [filetype, _ext] = String.split(content_type, "/")
  96
  97     if filetype == "image" and do_strip == true do
  98       Mogrify.open(file) |> Mogrify.custom("strip") |> Mogrify.save(in_place: true)
  99     end
 100   end
 101
 102   defp create_name(uuid, ext, type) do
 103     case type do
 104       "application/octet-stream" ->
 105         String.downcase(Enum.join([uuid, ext], "."))
 106
 107       "audio/mpeg" ->
 108         String.downcase(Enum.join([uuid, "mp3"], "."))
 109
 110       _ ->
 111         String.downcase(Enum.join([uuid, List.last(String.split(type, "/"))], "."))
 112     end
 113   end
 114
 115   defp get_uuid(file, should_dedupe) do
 116     if should_dedupe do
 117       Base.encode16(:crypto.hash(:sha256, File.read!(file.path)))
 118     else
 119       UUID.generate()
 120     end
 121   end
 122
 123   defp get_name(file, uuid, type, should_dedupe) do
 124     if should_dedupe do
 125       create_name(uuid, List.last(String.split(file.filename, ".")), type)
 126     else
 127       parts = String.split(file.filename, ".")
 128
 129       new_filename =
 130         if length(parts) > 1 do
 131           Enum.drop(parts, -1) |> Enum.join(".")
 132         else
 133           Enum.join(parts)
 134         end
 135
 136       case type do
 137         "application/octet-stream" -> file.filename
 138         "audio/mpeg" -> new_filename <> ".mp3"
 139         "image/jpeg" -> new_filename <> ".jpg"
 140         _ -> Enum.join([new_filename, String.split(type, "/") |> List.last()], ".")
 141       end
 142     end
 143   end
 144
 145   def get_content_type(file) do
 146     match =
 147       File.open(file, [:read], fn f ->
 148         case IO.binread(f, 8) do
 149           <<0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A>> ->
 150             "image/png"
 151
 152           <<0x47, 0x49, 0x46, 0x38, _, 0x61, _, _>> ->
 153             "image/gif"
 154
 155           <<0xFF, 0xD8, 0xFF, _, _, _, _, _>> ->
 156             "image/jpeg"
 157
 158           <<0x1A, 0x45, 0xDF, 0xA3, _, _, _, _>> ->
 159             "video/webm"
 160
 161           <<0x00, 0x00, 0x00, _, 0x66, 0x74, 0x79, 0x70>> ->
 162             "video/mp4"
 163
 164           <<0x49, 0x44, 0x33, _, _, _, _, _>> ->
 165             "audio/mpeg"
 166
 167           <<255, 251, _, 68, 0, 0, 0, 0>> ->
 168             "audio/mpeg"
 169
 170           <<0x4F, 0x67, 0x67, 0x53, 0x00, 0x02, 0x00, 0x00>> ->
 171             "audio/ogg"
 172
 173           <<0x52, 0x49, 0x46, 0x46, _, _, _, _>> ->
 174             "audio/wav"
 175
 176           _ ->
 177             "application/octet-stream"
 178         end
 179       end)
 180
 181     case match do
 182       {:ok, type} -> type
 183       _e -> "application/octet-stream"
 184     end
 185   end
 186 end