hippotatd: catch errors from request.finish in _req_cancel

It is not completely clear when it is necessary to call
request.finish.  Doing so when it is not necessary has a tendency to
throw an exception.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/hippotatd b/hippotatd
index b08ce66..f3d88d6 100755 (executable)
--- a/hippotatd
+++ b/hippotatd
@@ -104,7 +104,8 @@ class Client():
 
   def _req_cancel(self, request):
     self._log(DBG.HTTP_CTRL, 'cancel', idof=request)
-    request.finish()
+    try: request.finish()
+    except Exception: pass
 
   def _req_error(self, err, request):
     self._log(DBG.HTTP_CTRL, 'error %s' % err, idof=request)