Source code for milla.controllers
# Copyright 2011 Dustin C. Hatch
#
# 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.
'''Stub controller classes
These classes can be used as base classes for controllers. While any
callable can technically be a controller, using a class that inherits
from one or more of these classes can make things significantly easier.
:Created: Mar 27, 2011
:Author: dustin
:Updated: $Date$
:Updater: $Author$
'''
import datetime
import milla.util
import pkg_resources
[docs]class Controller(object):
'''The base controller class
This class simply provides empty ``__before__`` and ``__after__``
methods to facilitate cooperative multiple inheritance.
'''
def __before__(self, request):
pass
def __after__(self, request):
pass
[docs]class FaviconController(Controller):
'''A controller for the "favicon"
This controller is specifically suited to serve a site "favicon" or
bookmark icon. By default, it will serve the *Milla* icon, but you
can pass an alternate filename to the constructor.
:param icon: Path to an icon to serve
:param content_type: Internet media type describing the type of image
used as the favicon, defaults to 'image/x-icon' (Windows ICO format)
'''
#: Number of days in the future to set the cache expiration for the icon
EXPIRY_DAYS = 365
def __init__(self, icon=None, content_type='image/x-icon'):
if icon:
try:
self.icon = open(icon)
except (IOError, OSError):
self.icon = None
else:
try:
self.icon = pkg_resources.resource_stream('milla', 'milla.ico')
except IOError:
self.icon = None
self.content_type = content_type
def __call__(self, request):
if not self.icon:
raise milla.HTTPNotFound
response = milla.Response()
response.app_iter = self.icon
response.headers['Content-Type'] = self.content_type
expires = (datetime.datetime.utcnow() +
datetime.timedelta(days=self.EXPIRY_DAYS))
response.headers['Expires'] = milla.util.http_date(expires)
return response