X-Git-Url: http://git.squeep.com/?a=blobdiff_plain;ds=sidebyside;f=lib%2Fpleroma%2Fweb%2Frich_media%2Fhelpers.ex;h=061c1a79530c94e6233967a5dc85d19a6dca9a13;hb=a079ec3a3cdfd42d2cbd51c7698c2c87828e5778;hp=abb1cf7f2b481617fc18236328a397abf2032b65;hpb=6a6a5b3251f7137e30b687a9a8448e678446f8b0;p=akkoma
diff --git a/lib/pleroma/web/rich_media/helpers.ex b/lib/pleroma/web/rich_media/helpers.ex
index abb1cf7f2..061c1a795 100644
--- a/lib/pleroma/web/rich_media/helpers.ex
+++ b/lib/pleroma/web/rich_media/helpers.ex
@@ -1,21 +1,129 @@
# Pleroma: A lightweight social networking server
-# Copyright _ 2017-2019 Pleroma Authors
+# Copyright _ 2017-2020 Pleroma Authors
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.RichMedia.Helpers do
alias Pleroma.Activity
- alias Pleroma.Object
+ alias Pleroma.Config
alias Pleroma.HTML
+ alias Pleroma.Object
alias Pleroma.Web.RichMedia.Parser
- def fetch_data_for_activity(%Activity{} = activity) do
- with true <- Pleroma.Config.get([:rich_media, :enabled]),
- %Object{} = object <- Object.normalize(activity.data["object"]),
- {:ok, page_url} <- HTML.extract_first_external_url(object, object.data["content"]),
+ @options [
+ max_body: 2_000_000,
+ receive_timeout: 2_000
+ ]
+
+ @spec validate_page_url(URI.t() | binary()) :: :ok | :error
+ defp validate_page_url(page_url) when is_binary(page_url) do
+ validate_tld = Config.get([Pleroma.Formatter, :validate_tld])
+
+ page_url
+ |> Linkify.Parser.url?(validate_tld: validate_tld)
+ |> parse_uri(page_url)
+ end
+
+ defp validate_page_url(%URI{host: host, scheme: "https", authority: authority})
+ when is_binary(authority) do
+ cond do
+ host in Config.get([:rich_media, :ignore_hosts], []) ->
+ :error
+
+ get_tld(host) in Config.get([:rich_media, :ignore_tld], []) ->
+ :error
+
+ true ->
+ :ok
+ end
+ end
+
+ defp validate_page_url(_), do: :error
+
+ defp parse_uri(true, url) do
+ url
+ |> URI.parse()
+ |> validate_page_url
+ end
+
+ defp parse_uri(_, _), do: :error
+
+ defp get_tld(host) do
+ host
+ |> String.split(".")
+ |> Enum.reverse()
+ |> hd
+ end
+
+ def fetch_data_for_object(object) do
+ with true <- Config.get([:rich_media, :enabled]),
+ {:ok, page_url} <-
+ HTML.extract_first_external_url_from_object(object),
+ :ok <- validate_page_url(page_url),
{:ok, rich_media} <- Parser.parse(page_url) do
%{page_url: page_url, rich_media: rich_media}
else
_ -> %{}
end
end
+
+ def fetch_data_for_activity(%Activity{data: %{"type" => "Create"}} = activity) do
+ with true <- Config.get([:rich_media, :enabled]),
+ %Object{} = object <- Object.normalize(activity, fetch: false) do
+ fetch_data_for_object(object)
+ else
+ _ -> %{}
+ end
+ end
+
+ def fetch_data_for_activity(_), do: %{}
+
+ def rich_media_get(url) do
+ headers = [{"user-agent", Pleroma.Application.user_agent() <> "; Bot"}]
+
+ head_check =
+ case Pleroma.HTTP.head(url, headers, @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, @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
+
+ @max_body @options[:max_body]
+ defp check_content_length(headers) do
+ 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
end