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

   1 defmodule Pleroma.Upload do
   2   alias Ecto.UUID
   3   alias Pleroma.Web
   4
   5   def store(%Plug.Upload{} = file, should_dedupe) do
   6     content_type = get_content_type(file.path)
   7     uuid = get_uuid(file, should_dedupe)
   8     name = get_name(file, uuid, content_type, should_dedupe)
   9     upload_folder = get_upload_path(uuid, should_dedupe)
  10     url_path = get_url(name, uuid, should_dedupe)
  11
  12     File.mkdir_p!(upload_folder)
  13     result_file = Path.join(upload_folder, name)
  14
  15     if File.exists?(result_file) do
  16       File.rm!(file.path)
  17     else
  18       File.cp!(file.path, result_file)
  19     end
  20
  21     %{
  22       "type" => "Image",
  23       "url" => [
  24         %{
  25           "type" => "Link",
  26           "mediaType" => content_type,
  27           "href" => url_path
  28         }
  29       ],
  30       "name" => name
  31     }
  32   end
  33
  34   def store(%{"img" => "data:image/" <> image_data}, should_dedupe) do
  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     %{
  71       "type" => "Image",
  72       "url" => [
  73         %{
  74           "type" => "Link",
  75           "mediaType" => content_type,
  76           "href" => url_path
  77         }
  78       ],
  79       "name" => name
  80     }
  81   end
  82
  83   def upload_path do
  84     settings = Application.get_env(:pleroma, Pleroma.Upload)
  85     Keyword.fetch!(settings, :uploads)
  86   end
  87
  88   defp create_name(uuid, ext, type) do
  89     if type == "application/octet-stream" do
  90       String.downcase(Enum.join([uuid, ext], "."))
  91     else
  92       String.downcase(Enum.join([uuid, List.last(String.split(type, "/"))], "."))
  93     end
  94   end
  95
  96   defp get_uuid(file, should_dedupe) do
  97     if should_dedupe do
  98       Base.encode16(:crypto.hash(:sha256, File.read!(file.path)))
  99     else
 100       UUID.generate()
 101     end
 102   end
 103
 104   defp get_name(file, uuid, type, should_dedupe) do
 105     if should_dedupe do
 106       create_name(uuid, List.last(String.split(file.filename, ".")), type)
 107     else
 108       file.filename
 109     end
 110   end
 111
 112   defp get_upload_path(uuid, should_dedupe) do
 113     if should_dedupe do
 114       upload_path()
 115     else
 116       Path.join(upload_path(), uuid)
 117     end
 118   end
 119
 120   defp get_url(name, uuid, should_dedupe) do
 121     if should_dedupe do
 122       url_for(:cow_uri.urlencode(name))
 123     else
 124       url_for(Path.join(uuid, :cow_uri.urlencode(name)))
 125     end
 126   end
 127
 128   defp url_for(file) do
 129     "#{Web.base_url()}/media/#{file}"
 130   end
 131
 132   def get_content_type(file) do
 133     match =
 134       File.open(file, [:read], fn f ->
 135         case IO.binread(f, 8) do
 136           <<0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A>> ->
 137             "image/png"
 138
 139           <<0x47, 0x49, 0x46, 0x38, _, 0x61, _, _>> ->
 140             "image/gif"
 141
 142           <<0xFF, 0xD8, 0xFF, _, _, _, _, _>> ->
 143             "image/jpeg"
 144
 145           <<0x1A, 0x45, 0xDF, 0xA3, _, _, _, _>> ->
 146             "video/webm"
 147
 148           <<0x00, 0x00, 0x00, _, 0x66, 0x74, 0x79, 0x70>> ->
 149             "video/mp4"
 150
 151           <<0x49, 0x44, 0x33, _, _, _, _, _>> ->
 152             "audio/mpeg"
 153
 154           <<255, 251, _, 68, 0, 0, 0, 0>> ->
 155             "audio/mpeg"
 156
 157           <<0x4F, 0x67, 0x67, 0x53, 0x00, 0x02, 0x00, 0x00>> ->
 158             "audio/ogg"
 159
 160           <<0x52, 0x49, 0x46, 0x46, _, _, _, _>> ->
 161             "audio/wav"
 162
 163           _ ->
 164             "application/octet-stream"
 165         end
 166       end)
 167
 168     case match do
 169       {:ok, type} -> type
 170       _e -> "application/octet-stream"
 171     end
 172   end
 173 end