The SimpleXMLRPCServer's CGI handler now runs like a pony.

Lib/SimpleXMLRPCServer.py

@@ -598,8 +598,12 @@ class CGIXMLRPCRequestHandler(SimpleXMLRPCDispatcher):
             self.handle_get()
         else:
             # POST data is normally available through stdin
+            try:
+                length = int(os.environ.get('CONTENT_LENGTH', None))
+            except ValueError:
+                length = -1
             if request_text is None:
-                request_text = sys.stdin.read()
+                request_text = sys.stdin.read(length)
 
             self.handle_xmlrpc(request_text)
 

Misc/NEWS

@@ -200,6 +200,8 @@ Core and Builtins
 Library
 -------
 
+- Actually make the SimpleXMLRPCServer CGI handler work.
+
 - Issue #2522: locale.format now checks its first argument to ensure it has
   been passed only one pattern, avoiding mysterious errors where it appeared
   that it was failing to do localization.