mediagoblin/staticdirect.py

   1 # GNU MediaGoblin -- federated, autonomous media hosting
   2 # Copyright (C) 2011 MediaGoblin contributors.  See AUTHORS.
   3 #
   4 # This program is free software: you can redistribute it and/or modify
   5 # it under the terms of the GNU Affero General Public License as published by
   6 # the Free Software Foundation, either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU Affero General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU Affero General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 import pkg_resources
  18 import urlparse
  19
  20 ####################################
  21 # Staticdirect infrastructure.
  22 # Borrowed largely from cc.engine
  23 # by Chris Webber & Creative Commons
  24 #
  25 # This needs documentation!
  26 ####################################
  27
  28 import pkg_resources
  29 import urlparse
  30
  31
  32 class StaticDirect(object):
  33     def __init__(self):
  34         self.cache = {}
  35
  36     def __call__(self, filepath):
  37         if filepath in self.cache:
  38             return self.cache[filepath]
  39
  40         static_direction = self.cache[filepath] = self.get(filepath)
  41         return static_direction
  42
  43     def get(self, filepath):
  44         # should be implemented by the individual staticdirector
  45         pass
  46
  47
  48 class RemoteStaticDirect(StaticDirect):
  49     def __init__(self, remotepath):
  50         StaticDirect.__init__(self)
  51         self.remotepath = remotepath.rstrip('/')
  52
  53     def get(self, filepath):
  54         return '%s/%s' % (
  55             self.remotepath, filepath.lstrip('/'))
  56
  57
  58 class MultiRemoteStaticDirect(StaticDirect):
  59     """
  60     For whene separate sections of the static data is served under
  61     separate urls.
  62     """
  63     def __init__(self, remotepaths):
  64         StaticDirect.__init__(self)
  65         self.remotepaths = remotepaths
  66
  67     def get(self, filepath):
  68         section, rest = filepath.strip('/').split('/', 1)
  69
  70         return '%s/%s' % (
  71             self.remotepaths[section].rstrip('/'),
  72             rest.lstrip('/'))