77 lines
1.7 KiB
Elixir
77 lines
1.7 KiB
Elixir
# Pleroma: A lightweight social networking server
|
|
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
|
|
# SPDX-License-Identifier: AGPL-3.0-only
|
|
|
|
defmodule Pleroma.Web.RichMedia.Parser do
|
|
@hackney_options [
|
|
pool: :media,
|
|
recv_timeout: 2_000,
|
|
max_body: 2_000_000,
|
|
with_body: true
|
|
]
|
|
|
|
defp parsers do
|
|
Pleroma.Config.get([:rich_media, :parsers])
|
|
end
|
|
|
|
def parse(nil), do: {:error, "No URL provided"}
|
|
|
|
if Pleroma.Config.get(:env) == :test do
|
|
def parse(url), do: parse_url(url)
|
|
else
|
|
def parse(url) do
|
|
try do
|
|
Cachex.fetch!(:rich_media_cache, url, fn _ ->
|
|
{:commit, parse_url(url)}
|
|
end)
|
|
rescue
|
|
e ->
|
|
{:error, "Cachex error: #{inspect(e)}"}
|
|
end
|
|
end
|
|
end
|
|
|
|
defp parse_url(url) do
|
|
try do
|
|
{:ok, %Tesla.Env{body: html}} = Pleroma.HTTP.get(url, [], adapter: @hackney_options)
|
|
|
|
html
|
|
|> maybe_parse()
|
|
|> clean_parsed_data()
|
|
|> check_parsed_data()
|
|
rescue
|
|
e ->
|
|
{:error, "Parsing error: #{inspect(e)}"}
|
|
end
|
|
end
|
|
|
|
defp maybe_parse(html) do
|
|
Enum.reduce_while(parsers(), %{}, fn parser, acc ->
|
|
case parser.parse(html, acc) do
|
|
{:ok, data} -> {:halt, data}
|
|
{:error, _msg} -> {:cont, acc}
|
|
end
|
|
end)
|
|
end
|
|
|
|
defp check_parsed_data(%{title: title} = data) when is_binary(title) and byte_size(title) > 0 do
|
|
{:ok, data}
|
|
end
|
|
|
|
defp check_parsed_data(data) do
|
|
{:error, "Found metadata was invalid or incomplete: #{inspect(data)}"}
|
|
end
|
|
|
|
defp clean_parsed_data(data) do
|
|
data
|
|
|> Enum.reject(fn {key, val} ->
|
|
with {:ok, _} <- Jason.encode(%{key => val}) do
|
|
false
|
|
else
|
|
_ -> true
|
|
end
|
|
end)
|
|
|> Map.new()
|
|
end
|
|
end
|