Make OAuth client id accessible to new ui w/o hardcoding

appengine/swarming/handlers_frontend.py

 # Copyright 2013 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.
 
 """Main entry point for Swarming service.
 
 This file contains the URL handlers for all the Swarming service URLs,
 implemented using the webapp2 framework.
 """
 
@@ skipping 726 matching lines @@
       params['mapreduce_jobs'] = [
         {'id': job_id, 'name': job_def['job_name']}
         for job_id, job_def in mapreduce_jobs.MAPREDUCE_JOBS.iteritems()
       ]
       params['xsrf_token'] = self.generate_xsrf_token()
     if acl.is_bootstrapper():
       params['bootstrap_token'] = bot_code.generate_bootstrap_token()
     self.response.write(template.render('swarming/root.html', params))
 
 
+class UIHandler(auth.AuthenticatingHandler):
+  @auth.public
+  def get(self, page):
+    if not page:
+      page = "swarming"
+
+    params = {
+      'client_id': config.settings().ui_client_id,
+    }
+    self.response.write(template.render(
+        'swarming/public_%s_index.html' % page, params))
+
+
 class WarmupHandler(webapp2.RequestHandler):
   def get(self):
     auth.warmup()
     bot_code.get_swarming_bot_zip(self.request.host_url)
     utils.get_module_version_list(None, None)
     self.response.headers['Content-Type'] = 'text/plain; charset=utf-8'
     self.response.write('ok')
 
 
 class EmailHandler(webapp2.RequestHandler):
   """Blackhole any email sent."""
   def post(self, to):
     pass
 
 
 def create_application(debug):
   template.bootstrap()
   utils.set_task_queue_module('default')
 
   routes = [
       # Frontend pages. They return HTML.
       # Public pages.
       ('/', RootHandler),
       ('/stats', stats_gviz.StatsSummaryHandler),
+      ('/newui/<page:[a-z]*>', UIHandler),
 
       # User pages.
       ('/user/tasks', TasksHandler),
       ('/user/task/<task_id:[0-9a-fA-F]+>', TaskHandler),
       ('/user/task/<task_id:[0-9a-fA-F]+>/cancel', TaskCancelHandler),
       ('/user/task/<task_id:[0-9a-fA-F]+>/retry', TaskRetryHandler),
 
       # Privileged user pages.
       ('/restricted/bots', BotsListHandler),
       ('/restricted/bot/<bot_id:[^/]+>', BotHandler),
@@ skipping 21 matching lines @@
 
   # If running on a local dev server, allow bots to connect without prior
   # groups configuration. Useful when running smoke test.
   if utils.is_local_dev_server():
     acl.bootstrap_dev_server_acls()
 
   routes.extend(handlers_backend.get_routes())
   routes.extend(handlers_bot.get_routes())
   routes.extend(handlers_endpoints.get_routes())
   return webapp2.WSGIApplication(routes, debug=debug)