Make HTTP middleware easier to use

appengine/cmd/cron/ui/project.go

 // 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 projectPage(c context.Context, w http.ResponseWriter, r *http.Request, p httprouter.Params) {
-        projectID := p.ByName("ProjectID")
-        jobs, err := config(c).Engine.GetProjectCronJobs(c, projectID)
+func projectPage(c *router.Context) {
+        projectID := c.Params.ByName("ProjectID")
+        jobs, err := config(c.Context).Engine.GetProjectCronJobs(c.Context, projectID)
         if err != nil {
                 panic(err)
         }
-        templates.MustRender(c, w, "pages/project.html", map[string]interface{}{
+        templates.MustRender(c.Context, c.Writer, "pages/project.html", map[string]interface{}{
                 "ProjectID": projectID,
-                "Jobs":      convertToSortedCronJobs(jobs, clock.Now(c).UTC()),
+                "Jobs":      convertToSortedCronJobs(jobs, clock.Now(c.Context).UTC()),
         })
 }