media_proxy: use path only to retrieve filename

lib/pleroma/web/media_proxy/controller.ex

@@ -30,7 +30,7 @@ def remote(conn, params = %{"sig" => sig, "url" => url}) do
 
     with true <- Keyword.get(config, :enabled, false),
          {:ok, url} <- Pleroma.Web.MediaProxy.decode_url(sig, url),
-         filename <- Path.basename(url),
+         filename <- Path.basename(URI.parse(url).path),
          true <-
            if(Map.get(params, "filename"),
              do: filename == Path.basename(conn.request_path),

lib/pleroma/web/media_proxy/media_proxy.ex

@@ -15,7 +15,7 @@ def url(url) do
       base64 = Base.url_encode64(url, @base64_opts)
       sig = :crypto.hmac(:sha, secret, base64)
       sig64 = sig |> Base.url_encode64(@base64_opts)
-      filename = Path.basename(url)
+      filename = Path.basename(URI.parse(url).path)
 
       Keyword.get(config, :base_url, Pleroma.Web.base_url()) <>
         "/proxy/#{sig64}/#{base64}/#{filename}"