Catch HTTPException when reading from remote http repository.

Catch HTTPException when reading from remote http repository.

If the server dies very early, an httplib.IncompleteRead exception may be
raised, because httplib can't read a single byte. Catching all HTTPException
subclasses here will prevent ugly backtraces for similar things, too.

--- a/mercurial/httprepo.py	Tue Mar 28 09:26:38 2006 -0800
+++ b/mercurial/httprepo.py	Wed Mar 29 12:45:33 2006 +0200
@@ -9,7 +9,7 @@
 from remoterepo import *
 from i18n import gettext as _
 from demandload import *
-demandload(globals(), "hg os urllib urllib2 urlparse zlib util")
+demandload(globals(), "hg os urllib urllib2 urlparse zlib util httplib")
 
 class httprepository(remoterepository):
     def __init__(self, ui, path):
@@ -129,8 +129,11 @@
 
         def zgenerator(f):
             zd = zlib.decompressobj()
-            for chnk in f:
-                yield zd.decompress(chnk)
+            try:
+                for chnk in f:
+                    yield zd.decompress(chnk)
+            except httplib.HTTPException, inst:
+                raise IOError(None, _('connection ended unexpectedly'))
             yield zd.flush()
 
         return util.chunkbuffer(zgenerator(util.filechunkiter(f)))