Adds checking of template error

go/src/infra/tricium/service/default/handlers.go

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Package handlers implements HTTP handlers for the default module.
 package handlers
 
 import (
-        "html/template"
         "net/http"
 
         "google.golang.org/appengine"
         "google.golang.org/appengine/taskqueue"
+
+        "infra/tricium/service/common"
 )
 
 func init() {
         http.HandleFunc("/", landingPageHandler)
         http.HandleFunc("/analyze", analyzeHandler)
 }
 
-var basePage = template.Must(template.ParseFiles("templates/base.html"))
-
 func landingPageHandler(w http.ResponseWriter, r *http.Request) {
-        data := map[string]interface{}{
+        d := map[string]interface{}{
                 "Msg":             "This service is under construction ...",
                 "ShowRequestForm": true,
         }
-        basePage.Execute(w, data)
+        common.ShowBasePage(w, d)
 }
 
 func analyzeHandler(w http.ResponseWriter, r *http.Request) {
         ctx := appengine.NewContext(r)
         t := taskqueue.NewPOSTTask("/workflow-launcher/queue-handler", map[string][]string{"name": {"Analyze Request"}})
         if _, err := taskqueue.Add(ctx, t, "workflow-launcher-queue"); err != nil {
                 http.Error(w, err.Error(), http.StatusInternalServerError)
                 return
         }
-        data := map[string]interface{}{
+        d := map[string]interface{}{
                 "Msg": "Dummy analysis request sent.",
         }
-        basePage.Execute(w, data)
+        common.ShowBasePage(w, d)
 }