66 lines
1.7 KiB
Elixir
66 lines
1.7 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.RichMedia.Helpers do
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alias Pleroma.Config
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def rich_media_get(url) do
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headers = [{"user-agent", Pleroma.Application.user_agent() <> "; Bot"}]
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head_check =
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case Pleroma.HTTP.head(url, headers, http_options()) do
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# If the HEAD request didn't reach the server for whatever reason,
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# we assume the GET that comes right after won't either
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{:error, _} = e ->
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e
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{:ok, %Tesla.Env{status: 200, headers: headers}} ->
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with :ok <- check_content_type(headers),
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:ok <- check_content_length(headers),
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do: :ok
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_ ->
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:ok
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end
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with :ok <- head_check, do: Pleroma.HTTP.get(url, headers, http_options())
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end
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defp check_content_type(headers) do
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case List.keyfind(headers, "content-type", 0) do
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{_, content_type} ->
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case Plug.Conn.Utils.media_type(content_type) do
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{:ok, "text", "html", _} -> :ok
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_ -> {:error, {:content_type, content_type}}
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end
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_ ->
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:ok
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end
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end
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defp check_content_length(headers) do
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max_body = Keyword.get(http_options(), :max_body)
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case List.keyfind(headers, "content-length", 0) do
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{_, maybe_content_length} ->
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case Integer.parse(maybe_content_length) do
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{content_length, ""} when content_length <= max_body -> :ok
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{_, ""} -> {:error, :body_too_large}
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_ -> :ok
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end
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_ ->
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:ok
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end
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end
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defp http_options do
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[
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pool: :media,
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max_body: Config.get([:rich_media, :max_body], 5_000_000)
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]
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end
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end
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