##########################################################################
#
# Copyright (c) 2005 Imaginary Landscape LLC and Contributors.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
##########################################################################
"""
This module can be used to create fall-back resources. E.g., if you
have no Context/stylesheet.css, you may define another directory where
these resources may be found.
Typically you use this by turning ExtraPathInfo on in
Application.config, and adding a component to index.py (or Main.py)
like::
components = SitePage.components + [
ResourceComponent(resource_paths)]
"""
import os
import mimetypes
from Component import ServletComponent, Component
class ResourceServletComponent(ServletComponent):
def __init__(self, resource_dirs):
if isinstance(resource_dirs, (str, unicode)):
resource_dirs = [resource_dirs]
self.resource_dirs = resource_dirs
def awakeEvent(self, trans):
req = trans.request()
res = trans.response()
path = req.extraURLPath()
if not path:
return
assert path.startswith('/')
path = path.lstrip('/')
assert not path.startswith('/')
for dir in self.resource_dirs:
filename = os.path.join(dir, path)
if os.path.exists(filename):
break
else:
res.setHeader('status', '404 Not Found')
res.write('''Not Found
Not Found
The resource %s was not found.
''' %
req.environ().get('REQUEST_URI'))
self.servlet().endResponse()
type, encoding = mimetypes.guess_type(filename)
res.setHeader('content-type', type)
if encoding:
res.setHeader('content-encoding', encoding)
res.flush()
f = open(filename, 'rb')
while 1:
t = f.read(8000)
if not t:
break
res.write(t)
f.close()
self.servlet().endResponse()
class ResourceComponent(Component):
_componentClass = ResourceServletComponent