mirror of
https://framagit.org/framasoft/mobilizon.git
synced 2024-12-23 08:22:50 +00:00
83 lines
2.4 KiB
Elixir
83 lines
2.4 KiB
Elixir
# Portions of this file are derived from Pleroma:
|
|
# Pleroma: A lightweight social networking server
|
|
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
|
|
# SPDX-License-Identifier: AGPL-3.0-only
|
|
|
|
defmodule Mobilizon.Service.RichMedia.Parsers.OEmbed do
|
|
@moduledoc """
|
|
Module to parse OEmbed data in HTML pages
|
|
"""
|
|
alias Mobilizon.Service.Formatter.HTML
|
|
require Logger
|
|
|
|
@http_options [
|
|
follow_redirect: true,
|
|
ssl: [{:versions, [:"tlsv1.2"]}]
|
|
]
|
|
|
|
def parse(html, _data) do
|
|
Logger.debug("Using OEmbed parser")
|
|
|
|
with elements = [_ | _] <- get_discovery_data(html),
|
|
{:ok, oembed_url} <- get_oembed_url(elements),
|
|
{:ok, oembed_data} <- get_oembed_data(oembed_url),
|
|
oembed_data <- filter_oembed_data(oembed_data) do
|
|
Logger.debug("Data found with OEmbed parser")
|
|
Logger.debug(inspect(oembed_data))
|
|
{:ok, oembed_data}
|
|
else
|
|
_e ->
|
|
{:error, "No OEmbed data found"}
|
|
end
|
|
end
|
|
|
|
defp get_discovery_data(html) do
|
|
html |> Floki.find("link[type='application/json+oembed']")
|
|
end
|
|
|
|
defp get_oembed_url(nodes) do
|
|
{"link", attributes, _children} = nodes |> hd()
|
|
|
|
{:ok, Enum.into(attributes, %{})["href"]}
|
|
end
|
|
|
|
defp get_oembed_data(url) do
|
|
with {:ok, %HTTPoison.Response{body: json}} <- HTTPoison.get(url, [], @http_options),
|
|
{:ok, data} <- Jason.decode(json),
|
|
data <- data |> Map.new(fn {k, v} -> {String.to_atom(k), v} end) do
|
|
{:ok, data}
|
|
end
|
|
end
|
|
|
|
defp filter_oembed_data(data) do
|
|
case Map.get(data, :type) do
|
|
nil ->
|
|
{:error, "No type declared for OEmbed data"}
|
|
|
|
"link" ->
|
|
Map.put(data, :image_remote_url, Map.get(data, :thumbnail_url))
|
|
|
|
"photo" ->
|
|
if Map.get(data, :url, "") == "" do
|
|
{:error, "No URL for photo OEmbed data"}
|
|
else
|
|
data
|
|
|> Map.put(:image_remote_url, Map.get(data, :url))
|
|
|> Map.put(:width, Map.get(data, :width, 0))
|
|
|> Map.put(:height, Map.get(data, :height, 0))
|
|
end
|
|
|
|
"video" ->
|
|
{:ok, html} = data |> Map.get(:html, "") |> HTML.filter_tags_for_oembed()
|
|
|
|
data
|
|
|> Map.put(:html, html)
|
|
|> Map.put(:width, Map.get(data, :width, 0))
|
|
|> Map.put(:height, Map.get(data, :height, 0))
|
|
|> Map.put(:image_remote_url, Map.get(data, :thumbnail_url))
|
|
|
|
"rich" ->
|
|
{:error, "OEmbed data has rich type, which we don't support"}
|
|
end
|
|
end
|
|
end
|