Add a decolorize() helper to undo the effects of colorize().
#!/usr/bin/env python
#
# Copyright 2007 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
"""Convience functions for the Webapp framework."""
__all__ = ["login_required", "run_wsgi_app"]
import os
import sys
import wsgiref.util
from google.appengine.api import users
from google.appengine.ext import webapp
def login_required(handler_method):
"""A decorator to require that a user be logged in to access a handler.
To use it, decorate your get() method like this:
@login_required
def get(self):
user = users.get_current_user(self)
self.response.out.write('Hello, ' + user.nickname())
We will redirect to a login page if the user is not logged in. We always
redirect to the request URI, and Google Accounts only redirects back as a GET
request, so this should not be used for POSTs.
"""
def check_login(self, *args):
if self.request.method != 'GET':
raise webapp.Error('The check_login decorator can only be used for GET '
'requests')
user = users.get_current_user()
if not user:
self.redirect(users.create_login_url(self.request.uri))
return
else:
handler_method(self, *args)
return check_login
def run_wsgi_app(application):
"""Runs your WSGI-compliant application object in a CGI environment.
Compared to wsgiref.handlers.CGIHandler().run(application), this
function takes some shortcuts. Those are possible because the
app server makes stronger promises than the CGI standard.
"""
env = dict(os.environ)
env["wsgi.input"] = sys.stdin
env["wsgi.errors"] = sys.stderr
env["wsgi.version"] = (1, 0)
env["wsgi.run_once"] = True
env["wsgi.url_scheme"] = wsgiref.util.guess_scheme(env)
env["wsgi.multithread"] = False
env["wsgi.multiprocess"] = False
result = application(env, _start_response)
if result is not None:
for data in result:
sys.stdout.write(data)
def _start_response(status, headers, exc_info=None):
"""A start_response() callable as specified by PEP 333"""
if exc_info is not None:
raise exc_info[0], exc_info[1], exc_info[2]
print "Status: %s" % status
for name, val in headers:
print "%s: %s" % (name, val)
print
return sys.stdout.write