distraction.party/lib/pleroma/web/rel_me.ex

54 lines
1.6 KiB
Elixir

# Pleroma: A lightweight social networking server
# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.RelMe do
@options [
max_body: 2_000_000,
receive_timeout: 2_000
]
if Pleroma.Config.get(:env) == :test do
def parse(url) when is_binary(url), do: parse_url(url)
else
@cachex Pleroma.Config.get([:cachex, :provider], Cachex)
def parse(url) when is_binary(url) do
@cachex.fetch!(:rel_me_cache, url, fn _ ->
{:commit, parse_url(url)}
end)
rescue
e -> {:error, "Cachex error: #{inspect(e)}"}
end
end
def parse(_), do: {:error, "No URL provided"}
defp parse_url(url) do
with {:ok, %Tesla.Env{body: html, status: status}} when status in 200..299 <-
Pleroma.HTTP.get(url, [], @options),
{:ok, html_tree} <- Floki.parse_document(html),
data <-
Floki.attribute(html_tree, "link[rel~=me]", "href") ++
Floki.attribute(html_tree, "a[rel~=me]", "href") do
{:ok, data}
end
rescue
e -> {:error, "Parsing error: #{inspect(e)}"}
end
def maybe_put_rel_me("http" <> _ = target_page, profile_urls) when is_list(profile_urls) do
with {:parse, {:ok, rel_me_hrefs}} <- {:parse, parse(target_page)},
{:link_match, true} <-
{:link_match, Enum.any?(rel_me_hrefs, fn x -> x in profile_urls end)} do
"me"
else
e -> {:error, {:could_not_verify, target_page, e}}
end
rescue
e -> {:error, {:could_not_fetch, target_page, e}}
end
def maybe_put_rel_me(_, _) do
{:error, :invalid_url}
end
end