# HG changeset patch
# User Gregory Szorc <gregory.szorc@gmail.com>
# Date 2018-03-06 23:02:53
# Node ID 7574c8173d5edbac6a1ce1adf04d8635fc816786
# Parent  d4c760c997cd6bcf4793b7ff2087c99fde99a94a

wireprotoserver: check if command available before calling it

The previous behavior was just plain wrong. I have no clue how it
landed. My guess is a merge conflict resolution gone wrong on my
end a few weeks ago.

Differential Revision: https://phab.mercurial-scm.org/D2716

diff --git a/mercurial/wireprotoserver.py b/mercurial/wireprotoserver.py
--- a/mercurial/wireprotoserver.py
+++ b/mercurial/wireprotoserver.py
@@ -235,14 +235,14 @@ def _callhttp(repo, req, proto, cmd):
         for chunk in gen:
             yield chunk
 
-    rsp = wireproto.dispatch(repo, proto, cmd)
-
     if not wireproto.commands.commandavailable(cmd, proto):
         req.respond(HTTP_OK, HGERRTYPE,
                     body=_('requested wire protocol command is not available '
                            'over HTTP'))
         return []
 
+    rsp = wireproto.dispatch(repo, proto, cmd)
+
     if isinstance(rsp, bytes):
         req.respond(HTTP_OK, HGTYPE, body=rsp)
         return []