From 38284a69e7c9cfaf0ca3d23f2b3fc7cd5ed3044f Mon Sep 17 00:00:00 2001
From: Herwin Weststrate <herwin@quarantainenet.nl>
Date: Wed, 4 Sep 2024 17:40:10 +0200
Subject: [PATCH] Automatically detect the fastest XML parser

This should use libxml2 if available, and fall back to rexml otherwise.
Recent version of rexml have a tag limit to mitigate some DoS attacks,
which can easily be reached with the verbosity of XML-RPC.
---
 lib/xmlrpc/config.rb | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/xmlrpc/config.rb b/lib/xmlrpc/config.rb
index bd13932..27ecdd3 100644
--- a/lib/xmlrpc/config.rb
+++ b/lib/xmlrpc/config.rb
@@ -15,7 +15,11 @@ module Config
     #
     # * XMLParser::REXMLStreamParser
     # * XMLParser::LibXMLStreamParser
-    DEFAULT_PARSER = XMLParser::REXMLStreamParser
+    begin
+      DEFAULT_PARSER = XMLParser::LibXMLStreamParser.new.class
+    rescue LoadError
+      DEFAULT_PARSER = XMLParser::REXMLStreamParser.new.class
+    end
 
     # enable <code><nil/></code> tag
     ENABLE_NIL_CREATE    = false