diff --git a/mercurial/hgweb/webcommands.py b/mercurial/hgweb/webcommands.py
--- a/mercurial/hgweb/webcommands.py
+++ b/mercurial/hgweb/webcommands.py
@@ -431,56 +431,8 @@ def changeset(web, req, tmpl):
     templates related to diffs may all be used to produce the output.
     """
     ctx = webutil.changectx(web.repo, req)
-    basectx = webutil.basechangectx(web.repo, req)
-    if basectx is None:
-        basectx = ctx.p1()
-    showtags = webutil.showtag(web.repo, tmpl, 'changesettag', ctx.node())
-    showbookmarks = webutil.showbookmark(web.repo, tmpl, 'changesetbookmark',
-                                         ctx.node())
-    showbranch = webutil.nodebranchnodefault(ctx)
 
-    files = []
-    parity = paritygen(web.stripecount)
-    for blockno, f in enumerate(ctx.files()):
-        template = f in ctx and 'filenodelink' or 'filenolink'
-        files.append(tmpl(template,
-                          node=ctx.hex(), file=f, blockno=blockno + 1,
-                          parity=parity.next()))
-
-    style = web.config('web', 'style', 'paper')
-    if 'style' in req.form:
-        style = req.form['style'][0]
-
-    parity = paritygen(web.stripecount)
-    diffs = webutil.diffs(web.repo, tmpl, ctx, basectx, None, parity, style)
-
-    parity = paritygen(web.stripecount)
-    diffstatgen = webutil.diffstatgen(ctx, basectx)
-    diffstat = webutil.diffstat(tmpl, ctx, diffstatgen, parity)
-
-    return tmpl('changeset',
-                diff=diffs,
-                rev=ctx.rev(),
-                node=ctx.hex(),
-                parent=tuple(webutil.parents(ctx)),
-                child=webutil.children(ctx),
-                basenode=basectx.hex(),
-                changesettag=showtags,
-                changesetbookmark=showbookmarks,
-                changesetbranch=showbranch,
-                author=ctx.user(),
-                desc=ctx.description(),
-                extra=ctx.extra(),
-                date=ctx.date(),
-                files=files,
-                diffsummary=lambda **x: webutil.diffsummary(diffstatgen),
-                diffstat=diffstat,
-                archives=web.archivelist(ctx.hex()),
-                tags=webutil.nodetagsdict(web.repo, ctx.node()),
-                bookmarks=webutil.nodebookmarksdict(web.repo, ctx.node()),
-                branch=webutil.nodebranchnodefault(ctx),
-                inbranch=webutil.nodeinbranch(web.repo, ctx),
-                branches=webutil.nodebranchdict(web.repo, ctx))
+    return tmpl('changeset', **webutil.changesetentry(web, req, tmpl, ctx))
 
 rev = webcommand('rev')(changeset)
 
diff --git a/mercurial/hgweb/webutil.py b/mercurial/hgweb/webutil.py
--- a/mercurial/hgweb/webutil.py
+++ b/mercurial/hgweb/webutil.py
@@ -10,7 +10,7 @@ import os, copy
 from mercurial import match, patch, error, ui, util, pathutil, context
 from mercurial.i18n import _
 from mercurial.node import hex, nullid
-from common import ErrorResponse
+from common import ErrorResponse, paritygen
 from common import HTTP_NOT_FOUND
 import difflib
 
@@ -279,6 +279,61 @@ def changelistentry(web, ctx, tmpl):
         "branches": nodebranchdict(repo, ctx)
     }
 
+def changesetentry(web, req, tmpl, ctx):
+    '''Obtain a dictionary to be used to render the "changeset" template.'''
+
+    showtags = showtag(web.repo, tmpl, 'changesettag', ctx.node())
+    showbookmarks = showbookmark(web.repo, tmpl, 'changesetbookmark',
+                                 ctx.node())
+    showbranch = nodebranchnodefault(ctx)
+
+    files = []
+    parity = paritygen(web.stripecount)
+    for blockno, f in enumerate(ctx.files()):
+        template = f in ctx and 'filenodelink' or 'filenolink'
+        files.append(tmpl(template,
+                          node=ctx.hex(), file=f, blockno=blockno + 1,
+                          parity=parity.next()))
+
+    basectx = basechangectx(web.repo, req)
+    if basectx is None:
+        basectx = ctx.p1()
+
+    style = web.config('web', 'style', 'paper')
+    if 'style' in req.form:
+        style = req.form['style'][0]
+
+    parity = paritygen(web.stripecount)
+    diff = diffs(web.repo, tmpl, ctx, basectx, None, parity, style)
+
+    parity = paritygen(web.stripecount)
+    diffstatsgen = diffstatgen(ctx, basectx)
+    diffstats = diffstat(tmpl, ctx, diffstatsgen, parity)
+
+    return dict(
+        diff=diff,
+        rev=ctx.rev(),
+        node=ctx.hex(),
+        parent=tuple(parents(ctx)),
+        child=children(ctx),
+        basenode=basectx.hex(),
+        changesettag=showtags,
+        changesetbookmark=showbookmarks,
+        changesetbranch=showbranch,
+        author=ctx.user(),
+        desc=ctx.description(),
+        extra=ctx.extra(),
+        date=ctx.date(),
+        files=files,
+        diffsummary=lambda **x: diffsummary(diffstatsgen),
+        diffstat=diffstats,
+        archives=web.archivelist(ctx.hex()),
+        tags=nodetagsdict(web.repo, ctx.node()),
+        bookmarks=nodebookmarksdict(web.repo, ctx.node()),
+        branch=nodebranchnodefault(ctx),
+        inbranch=nodeinbranch(web.repo, ctx),
+        branches=nodebranchdict(web.repo, ctx))
+
 def listfilediffs(tmpl, files, node, max):
     for f in files[:max]:
         yield tmpl('filedifflink', node=hex(node), file=f)