defmodule Pleroma.Web.MediaProxy do
alias Pleroma.Config
+ alias Pleroma.Helpers.UriHelper
alias Pleroma.Upload
alias Pleroma.Web
alias Pleroma.Web.MediaProxy.Invalidation
@base64_opts [padding: false]
+ @cache_table :banned_urls_cache
+
+ def cache_table, do: @cache_table
@spec in_banned_urls(String.t()) :: boolean()
- def in_banned_urls(url), do: elem(Cachex.exists?(:banned_urls_cache, url(url)), 1)
+ def in_banned_urls(url), do: elem(Cachex.exists?(@cache_table, url(url)), 1)
def remove_from_banned_urls(urls) when is_list(urls) do
- Cachex.execute!(:banned_urls_cache, fn cache ->
+ Cachex.execute!(@cache_table, 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))
+ Cachex.del(@cache_table, url(url))
end
def put_in_banned_urls(urls) when is_list(urls) do
- Cachex.execute!(:banned_urls_cache, fn cache ->
+ Cachex.execute!(@cache_table, 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)
+ Cachex.put(@cache_table, url(url), true)
end
def url(url) when is_nil(url) or url == "", do: nil
def url("/" <> _ = url), do: url
def url(url) do
- if disabled?() or not url_proxiable?(url) do
- url
- else
+ if enabled?() and url_proxiable?(url) do
encode_url(url)
+ else
+ url
end
end
@spec url_proxiable?(String.t()) :: boolean()
def url_proxiable?(url) do
- if local?(url) or whitelisted?(url) do
- false
+ not local?(url) and not whitelisted?(url)
+ end
+
+ def preview_url(url, preview_params \\ []) do
+ if preview_enabled?() do
+ encode_preview_url(url, preview_params)
else
- true
+ url(url)
end
end
- defp disabled?, do: !Config.get([:media_proxy, :enabled], false)
+ def enabled?, do: Config.get([:media_proxy, :enabled], false)
+
+ # Note: media proxy must be enabled for media preview proxy in order to load all
+ # non-local non-whitelisted URLs through it and be sure that body size constraint is preserved.
+ def preview_enabled?, do: enabled?() and !!Config.get([:media_preview_proxy, :enabled])
- defp local?(url), do: String.starts_with?(url, Pleroma.Web.base_url())
+ def local?(url), do: String.starts_with?(url, Pleroma.Web.base_url())
- defp whitelisted?(url) do
+ def whitelisted?(url) do
%{host: domain} = URI.parse(url)
- mediaproxy_whitelist = Config.get([:media_proxy, :whitelist])
+ mediaproxy_whitelist_domains =
+ [:media_proxy, :whitelist]
+ |> Config.get()
+ |> Enum.map(&maybe_get_domain_from_url/1)
- upload_base_url_domain =
- if !is_nil(Config.get([Upload, :base_url])) do
- [URI.parse(Config.get([Upload, :base_url])).host]
+ 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
- whitelist = mediaproxy_whitelist ++ upload_base_url_domain
+ domain in whitelist_domains
+ end
- Enum.any?(whitelist, fn pattern ->
- String.equivalent?(domain, pattern)
- end)
+ defp maybe_get_domain_from_url("http" <> _ = url) do
+ URI.parse(url).host
end
- def encode_url(url) do
+ defp maybe_get_domain_from_url(domain), do: domain
+
+ defp base64_sig64(url) do
base64 = Base.url_encode64(url, @base64_opts)
sig64 =
base64
- |> signed_url
+ |> signed_url()
|> Base.url_encode64(@base64_opts)
+ {base64, sig64}
+ end
+
+ def encode_url(url) do
+ {base64, sig64} = base64_sig64(url)
+
build_url(sig64, base64, filename(url))
end
+ def encode_preview_url(url, preview_params \\ []) do
+ {base64, sig64} = base64_sig64(url)
+
+ build_preview_url(sig64, base64, filename(url), preview_params)
+ end
+
def decode_url(sig, url) do
with {:ok, sig} <- Base.url_decode64(sig, @base64_opts),
signature when signature == sig <- signed_url(url) do
if path = URI.parse(url_or_path).path, do: Path.basename(path)
end
- def build_url(sig_base64, url_base64, filename \\ nil) do
+ def base_url do
+ Config.get([:media_proxy, :base_url], Web.base_url())
+ end
+
+ defp proxy_url(path, sig_base64, url_base64, filename) do
[
- Config.get([:media_proxy, :base_url], Web.base_url()),
- "proxy",
+ base_url(),
+ path,
sig_base64,
url_base64,
filename
|> Enum.filter(& &1)
|> Path.join()
end
+
+ def build_url(sig_base64, url_base64, filename \\ nil) do
+ proxy_url("proxy", sig_base64, url_base64, filename)
+ end
+
+ def build_preview_url(sig_base64, url_base64, filename \\ nil, preview_params \\ []) do
+ uri = proxy_url("proxy/preview", sig_base64, url_base64, filename)
+
+ UriHelper.modify_uri_params(uri, preview_params)
+ end
+
+ def verify_request_path_and_url(
+ %Plug.Conn{params: %{"filename" => _}, request_path: request_path},
+ url
+ ) do
+ verify_request_path_and_url(request_path, url)
+ end
+
+ def verify_request_path_and_url(request_path, url) when is_binary(request_path) do
+ filename = filename(url)
+
+ if filename && not basename_matches?(request_path, filename) do
+ {:wrong_filename, filename}
+ else
+ :ok
+ end
+ end
+
+ def verify_request_path_and_url(_, _), do: :ok
+
+ defp basename_matches?(path, filename) do
+ basename = Path.basename(path)
+ basename == filename or URI.decode(basename) == filename or URI.encode(basename) == filename
+ end
end
projects / akkoma / blobdiff