X-Git-Url: https://git.squeep.com/?a=blobdiff_plain;f=lib%2Fpleroma%2Fweb%2Fmedia_proxy%2Fmedia_proxy.ex;h=dfbfcea6bc74620504e9a0b339d8ca315b43e066;hb=7755f49e281e4990db5317b33d6b8e0d12982e0c;hp=5762e767b8586b0b5511d4f5bd425ac77889af8b;hpb=45f790becc2cc63ac000c6432fe8c84e0b589822;p=akkoma
diff --git a/lib/pleroma/web/media_proxy/media_proxy.ex b/lib/pleroma/web/media_proxy/media_proxy.ex
index 5762e767b..dfbfcea6b 100644
--- a/lib/pleroma/web/media_proxy/media_proxy.ex
+++ b/lib/pleroma/web/media_proxy/media_proxy.ex
@@ -1,89 +1,124 @@
# Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors
+# Copyright © 2017-2020 Pleroma Authors
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.MediaProxy do
+ alias Pleroma.Config
+ alias Pleroma.Upload
+ alias Pleroma.Web
+ alias Pleroma.Web.MediaProxy.Invalidation
+
@base64_opts [padding: false]
- def url(nil), do: nil
+ @spec in_banned_urls(String.t()) :: boolean()
+ def in_banned_urls(url), do: elem(Cachex.exists?(:banned_urls_cache, url(url)), 1)
- def url(""), do: nil
+ def remove_from_banned_urls(urls) when is_list(urls) do
+ Cachex.execute!(:banned_urls_cache, fn cache ->
+ Enum.each(Invalidation.prepare_urls(urls), &Cachex.del(cache, &1))
+ end)
+ end
+ def remove_from_banned_urls(url) when is_binary(url) do
+ Cachex.del(:banned_urls_cache, url(url))
+ end
+
+ def put_in_banned_urls(urls) when is_list(urls) do
+ Cachex.execute!(:banned_urls_cache, fn cache ->
+ Enum.each(Invalidation.prepare_urls(urls), &Cachex.put(cache, &1, true))
+ end)
+ end
+
+ def put_in_banned_urls(url) when is_binary(url) do
+ Cachex.put(:banned_urls_cache, url(url), true)
+ end
+
+ def url(url) when is_nil(url) or url == "", do: nil
def url("/" <> _ = url), do: url
def url(url) do
- config = Application.get_env(:pleroma, :media_proxy, [])
- domain = URI.parse(url).host
+ if disabled?() or not url_proxiable?(url) do
+ url
+ else
+ encode_url(url)
+ end
+ end
+
+ @spec url_proxiable?(String.t()) :: boolean()
+ def url_proxiable?(url) do
+ if local?(url) or whitelisted?(url) do
+ false
+ else
+ true
+ end
+ end
- cond do
- !Keyword.get(config, :enabled, false) or String.starts_with?(url, Pleroma.Web.base_url()) ->
- url
+ defp disabled?, do: !Config.get([:media_proxy, :enabled], false)
- Enum.any?(Pleroma.Config.get([:media_proxy, :whitelist]), fn pattern ->
- String.equivalent?(domain, pattern)
- end) ->
- url
+ defp local?(url), do: String.starts_with?(url, Pleroma.Web.base_url())
- true ->
- encode_url(url)
- end
+ defp whitelisted?(url) do
+ %{host: domain} = URI.parse(url)
+
+ mediaproxy_whitelist_domains =
+ [:media_proxy, :whitelist]
+ |> Config.get()
+ |> Enum.map(&maybe_get_domain_from_url/1)
+
+ whitelist_domains =
+ if base_url = Config.get([Upload, :base_url]) do
+ %{host: base_domain} = URI.parse(base_url)
+ [base_domain | mediaproxy_whitelist_domains]
+ else
+ mediaproxy_whitelist_domains
+ end
+
+ domain in whitelist_domains
end
- def encode_url(url) do
- secret = Application.get_env(:pleroma, Pleroma.Web.Endpoint)[:secret_key_base]
+ defp maybe_get_domain_from_url("http" <> _ = url) do
+ URI.parse(url).host
+ end
- # Must preserve `%2F` for compatibility with S3
- # https://git.pleroma.social/pleroma/pleroma/issues/580
- replacement = get_replacement(url, ":2F:")
+ defp maybe_get_domain_from_url(domain), do: domain
- # The URL is url-decoded and encoded again to ensure it is correctly encoded and not twice.
- base64 =
- url
- |> String.replace("%2F", replacement)
- |> URI.decode()
- |> URI.encode()
- |> String.replace(replacement, "%2F")
- |> Base.url_encode64(@base64_opts)
+ def encode_url(url) do
+ base64 = Base.url_encode64(url, @base64_opts)
- sig = :crypto.hmac(:sha, secret, base64)
- sig64 = sig |> Base.url_encode64(@base64_opts)
+ sig64 =
+ base64
+ |> signed_url
+ |> Base.url_encode64(@base64_opts)
build_url(sig64, base64, filename(url))
end
def decode_url(sig, url) do
- secret = Application.get_env(:pleroma, Pleroma.Web.Endpoint)[:secret_key_base]
- sig = Base.url_decode64!(sig, @base64_opts)
- local_sig = :crypto.hmac(:sha, secret, url)
-
- if local_sig == sig do
+ with {:ok, sig} <- Base.url_decode64(sig, @base64_opts),
+ signature when signature == sig <- signed_url(url) do
{:ok, Base.url_decode64!(url, @base64_opts)}
else
- {:error, :invalid_signature}
+ _ -> {:error, :invalid_signature}
end
end
+ defp signed_url(url) do
+ :crypto.hmac(:sha, Config.get([Web.Endpoint, :secret_key_base]), url)
+ end
+
def filename(url_or_path) do
if path = URI.parse(url_or_path).path, do: Path.basename(path)
end
def build_url(sig_base64, url_base64, filename \\ nil) do
[
- Pleroma.Config.get([:media_proxy, :base_url], Pleroma.Web.base_url()),
+ Config.get([:media_proxy, :base_url], Web.base_url()),
"proxy",
sig_base64,
url_base64,
filename
]
- |> Enum.filter(fn value -> value end)
+ |> Enum.filter(& &1)
|> Path.join()
end
-
- defp get_replacement(url, replacement) do
- if String.contains?(url, replacement) do
- get_replacement(url, replacement <> replacement)
- else
- replacement
- end
- end
end