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37 lines
1.2 KiB
Elixir
37 lines
1.2 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.RichMedia.Parsers.OEmbed do
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def parse(html, _data) do
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with elements = [_ | _] <- get_discovery_data(html),
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oembed_url when is_binary(oembed_url) <- get_oembed_url(elements),
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{:ok, oembed_data} <- get_oembed_data(oembed_url) do
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oembed_data
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else
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_e -> %{}
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end
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end
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defp get_discovery_data(html) do
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html |> Floki.find("link[type='application/json+oembed']")
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end
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defp get_oembed_url([{"link", attributes, _children} | _]) do
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Enum.find_value(attributes, fn {k, v} -> if k == "href", do: v end)
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end
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# YouTube's oEmbed implementation is broken, requiring this hack.
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# https://github.com/oscarotero/Embed/issues/417#issuecomment-746673027
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defp get_oembed_data("http://www.youtube.com/oembed?" <> params) do
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# Use HTTPS explicitly, even though YouTube returns HTTP
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get_oembed_data("https://www.youtube.com/oembed?#{params}")
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end
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defp get_oembed_data(url) do
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with {:ok, %Tesla.Env{body: json}} <- Pleroma.Web.RichMedia.Helpers.rich_media_get(url) do
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Jason.decode(json)
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end
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end
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end
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