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

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