[PATCH] hgweb: propagate http headers from ErrorResponse for web interface commands

[Sune Foldager]

# HG changeset patch
# User Sune Foldager <cryo at cyanite.org>
# Date 1528976682 -7200
#      Thu Jun 14 13:44:42 2018 +0200
# Node ID d81af9ddf782d3761e89f778d42756b91514d1cc
# Parent  c07424ec633c2541136a1b35dbcea1b3243dc1c1
hgweb: propagate http headers from ErrorResponse for web interface commands

This makes it possible for e.g. authorization hooks to provide appropriate
headers to make the web browser ask for credentials.

It's done in the same way as the existing code in wireprotoserver.py.

diff -r c07424ec633c -r d81af9ddf782 mercurial/hgweb/hgweb_mod.py
--- a/mercurial/hgweb/hgweb_mod.py	Tue Jun 12 12:41:09 2018 -0700
+++ b/mercurial/hgweb/hgweb_mod.py	Thu Jun 14 13:44:42 2018 +0200
@@ -441,6 +441,8 @@
             res.headers['Content-Type'] = ctype
             return rctx.sendtemplate('error', error=pycompat.bytestr(e))
         except ErrorResponse as e:
+            for k, v in e.headers:
+                res.headers[k] = v
             res.status = statusmessage(e.code, pycompat.bytestr(e))
             res.headers['Content-Type'] = ctype
             return rctx.sendtemplate('error', error=pycompat.bytestr(e))