ignore client shutdown exceptions when sending responses

patch from Ulrik Miaelsson

If the user clicks the stop button, or click another link before
the previous has finished loading, or something similar an IOError
exception will be raised which results in the admin being sent an
email.

This can understandably be pretty annoying if your users are
doing that on a regular basis. So we'll trap that exception
and ignore it.

Author: Justus Pendleton

roundup/cgi/client.py

@@ -1,4 +1,4 @@
-# $Id: client.py,v 1.234 2007-08-27 10:27:31 richard Exp $
+# $Id: client.py,v 1.235 2007-09-11 21:30:14 jpend Exp $
 
 """WWW request handler (also used in the stand-alone server).
 """
@@ -287,7 +287,11 @@ def inner_main(self):
             self.additional_headers['Expires'] = rfc822.formatdate(date)
 
             # render the content
-            self.write_html(self.renderContext())
+            try:
+                self.write_html(self.renderContext())
+            except IOError:
+                # IOErrors here are due to the client disconnecting before recieving the reply.
+                pass
 
         except SeriousError, message:
             self.write_html(str(message))