Make HTTP middleware easier to use

appengine/cmd/cron/ui/index.go

Index: appengine/cmd/cron/ui/index.go
diff --git a/appengine/cmd/cron/ui/index.go b/appengine/cmd/cron/ui/index.go
index da80ad745253df7f24037d73bb05dea153663316..c22ba660b2af0e50c5187a1f45b9261c9651aafb 100644
--- a/appengine/cmd/cron/ui/index.go
+++ b/appengine/cmd/cron/ui/index.go
@@ -1,25 +1,21 @@
 // Copyright 2015 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package ui
 
 import (
-	"net/http"
-
-	"github.com/julienschmidt/httprouter"
-	"golang.org/x/net/context"
-
 	"github.com/luci/luci-go/common/clock"
+	"github.com/luci/luci-go/server/router"
 	"github.com/luci/luci-go/server/templates"
 )
 
-func indexPage(c context.Context, w http.ResponseWriter, r *http.Request, p httprouter.Params) {
-	jobs, err := config(c).Engine.GetAllCronJobs(c)
+func indexPage(c *router.Context) {
+	jobs, err := config(c.Context).Engine.GetAllCronJobs(c.Context)
 	if err != nil {
 		panic(err)
 	}
-	templates.MustRender(c, w, "pages/index.html", map[string]interface{}{
-		"Jobs": convertToSortedCronJobs(jobs, clock.Now(c).UTC()),
+	templates.MustRender(c.Context, c.Writer, "pages/index.html", map[string]interface{}{
+		"Jobs": convertToSortedCronJobs(jobs, clock.Now(c.Context).UTC()),
 	})
 }