chromium_build_stats: redirect login url if not logged in.

appengine/chromium_build_stats/default/ninja_log.go

 // Copyright 2014 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 chromiumbuildstats
 
 // ninja_log.go provides /ninja_log endpoints.
 
 import (
         "bufio"
@@ skipping 146 matching lines @@
         }
 }
 
 func ninjalogForm(w http.ResponseWriter, req *http.Request) {
         if req.Method == "POST" {
                 ninjalogUpload(w, req)
                 return
         }
         ctx := appengine.NewContext(req)
         u := user.Current(ctx)
-        login, err := user.LoginURL(ctx, "/ninja_log/")
-        if err != nil {
-                http.Error(w, err.Error(), http.StatusInternalServerError)
-                return
-        }
-        logout, err := user.LogoutURL(ctx, "/ninja_log/")
-        if err != nil {
-                http.Error(w, err.Error(), http.StatusInternalServerError)
-                return
-        }
-        w.Header().Set("Content-Type", "text/html")
-        w.WriteHeader(http.StatusOK)
-        data := struct {
-                User   *user.User
-                Login  string
-                Logout string
-        }{
-                User:   u,
-                Login:  login,
-                Logout: logout,
-        }
-        err = formTmpl.Execute(w, data)
-        if err != nil {
-                ctx.Errorf("formTmpl: %v", err)
-        }
-
+        authPage(w, req, http.StatusOK, formTmpl, u, "/ninja_log/")
 }
 
 func ninjalogUpload(w http.ResponseWriter, req *http.Request) {
         ctx := appengine.NewContext(req)
         u := user.Current(ctx)
         if u == nil {
                 http.Error(w, "unauthorized", http.StatusUnauthorized)
                 return
         }
         // TODO(ukai): allow only @google.com and @chromium.org?
@@ skipping 123 matching lines @@
         traces := ninjalog.ToTraces(flow, 1)
         b, err := traceViewerTmpl.HTML(logPath, traces)
         if err != nil {
                 return err
         }
         w.Header().Set("Content-Type", "text/html; charset=utf-8")
         w.WriteHeader(http.StatusOK)
         _, err = w.Write(b)
         return err
 }