66 lines
1.7 KiB
Elixir
66 lines
1.7 KiB
Elixir
# Pleroma: A lightweight social networking server
|
|
# Copyright _ 2017-2020 Pleroma Authors <https://pleroma.social/>
|
|
# SPDX-License-Identifier: AGPL-3.0-only
|
|
|
|
defmodule Pleroma.Web.RichMedia.Helpers do
|
|
alias Pleroma.Config
|
|
|
|
def rich_media_get(url) do
|
|
headers = [{"user-agent", Pleroma.Application.user_agent() <> "; Bot"}]
|
|
|
|
head_check =
|
|
case Pleroma.HTTP.head(url, headers, http_options()) do
|
|
# If the HEAD request didn't reach the server for whatever reason,
|
|
# we assume the GET that comes right after won't either
|
|
{:error, _} = e ->
|
|
e
|
|
|
|
{:ok, %Tesla.Env{status: 200, headers: headers}} ->
|
|
with :ok <- check_content_type(headers),
|
|
:ok <- check_content_length(headers),
|
|
do: :ok
|
|
|
|
_ ->
|
|
:ok
|
|
end
|
|
|
|
with :ok <- head_check, do: Pleroma.HTTP.get(url, headers, http_options())
|
|
end
|
|
|
|
defp check_content_type(headers) do
|
|
case List.keyfind(headers, "content-type", 0) do
|
|
{_, content_type} ->
|
|
case Plug.Conn.Utils.media_type(content_type) do
|
|
{:ok, "text", "html", _} -> :ok
|
|
_ -> {:error, {:content_type, content_type}}
|
|
end
|
|
|
|
_ ->
|
|
:ok
|
|
end
|
|
end
|
|
|
|
defp check_content_length(headers) do
|
|
max_body = Keyword.get(http_options(), :max_body)
|
|
|
|
case List.keyfind(headers, "content-length", 0) do
|
|
{_, maybe_content_length} ->
|
|
case Integer.parse(maybe_content_length) do
|
|
{content_length, ""} when content_length <= max_body -> :ok
|
|
{_, ""} -> {:error, :body_too_large}
|
|
_ -> :ok
|
|
end
|
|
|
|
_ ->
|
|
:ok
|
|
end
|
|
end
|
|
|
|
defp http_options do
|
|
[
|
|
pool: :media,
|
|
max_body: Config.get([:rich_media, :max_body], 5_000_000)
|
|
]
|
|
end
|
|
end
|