forked from potsda.mn/mobilizon
46 lines
1.5 KiB
Elixir
46 lines
1.5 KiB
Elixir
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# Portions of this file are derived from Pleroma:
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# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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# Upstream: https://git.pleroma.social/pleroma/pleroma/blob/develop/lib/pleroma/web/media_proxy/controller.ex
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defmodule MobilizonWeb.MediaProxyController do
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use MobilizonWeb, :controller
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alias MobilizonWeb.ReverseProxy
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alias MobilizonWeb.MediaProxy
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@default_proxy_opts [max_body_length: 25 * 1_048_576, http: [follow_redirect: true]]
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def remote(conn, %{"sig" => sig64, "url" => url64} = params) do
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with config <- Mobilizon.CommonConfig.get([:media_proxy], []),
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true <- Keyword.get(config, :enabled, false),
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{:ok, url} <- MediaProxy.decode_url(sig64, url64),
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:ok <- filename_matches(Map.has_key?(params, "filename"), conn.request_path, url) do
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ReverseProxy.call(conn, url, Keyword.get(config, :proxy_opts, @default_proxy_opts))
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else
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false ->
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send_resp(conn, 404, Plug.Conn.Status.reason_phrase(404))
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{:error, :invalid_signature} ->
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send_resp(conn, 403, Plug.Conn.Status.reason_phrase(403))
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{:wrong_filename, filename} ->
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redirect(conn, external: MediaProxy.build_url(sig64, url64, filename))
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end
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end
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def filename_matches(has_filename, path, url) do
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filename =
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url
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|> MediaProxy.filename()
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|> URI.decode()
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path = URI.decode(path)
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if has_filename && filename && Path.basename(path) != filename do
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{:wrong_filename, filename}
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else
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:ok
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end
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end
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end
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