[PATCH] httprepo: make sure we have auth before sending large bundles

[durin42 at gmail.com]

# HG changeset patch
# User Augie Fackler <durin42 at gmail.com>
# Date 1253039420 18000
# Node ID d63d385f0f1c542bb789fc592455ed50db138393
# Parent  de414835d1405ccec77f6cc5211859368ae8274f
httprepo: make sure we have auth before sending large bundles

Send an empty bundle to the server to verify we are properly
authenticated before sending a large bundle. This prevents doing an
unbundle of many megabytes and then immediately do it again with auth.

diff --git a/mercurial/httprepo.py b/mercurial/httprepo.py
--- a/mercurial/httprepo.py
+++ b/mercurial/httprepo.py
@@ -211,6 +211,13 @@
 
         tempname = changegroup.writebundle(cg, None, type)
         fp = url.httpsendfile(tempname, "rb")
+
+        if len(fp) > 1024:
+            self.ui.debug('push empty bundle to check for auth\n')
+            self.do_read('unbundle', data=''
+                         headers={'Content-Type': 'application/octet-stream'},
+                         heads=' '.join(map(hex, self.heads())))
+
         try:
             try:
                 resp = self.do_read(