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# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.RelMe do
@options [
pool: :media,
max_body: 2_000_000
]
if Pleroma.Config.get(:env) == :test do
def parse(url) when is_binary(url), do: parse_url(url)
else
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
opts =
if Application.get_env(:tesla, :adapter) == Tesla.Adapter.Hackney do
Keyword.merge(@options,
recv_timeout: 2_000,
with_body: true
)
else
@options
end
with {:ok, %Tesla.Env{body: html, status: status}} when status in 200..299 <-
Pleroma.HTTP.get(url, [], adapter: opts),
{: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
{:ok, rel_me_hrefs} = parse(target_page)
true = Enum.any?(rel_me_hrefs, fn x -> x in profile_urls end)
"me"
rescue
_ -> nil
end
def maybe_put_rel_me(_, _) do
nil
end
end
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