CacheHandler.py

   1 #
   2 # CacheHandler.py
   3 #
   4 # classes for dealing with object cache
   5 #
   6 # (c) 2004, Davyd Madeley
   7 #
   8
   9 import dircache, cPickle, sys, os
  10
  11 class CacheHandler:
  12         def __create_name__(self, title, feed):
  13                 return "%s_%s.cache" % (title.replace(' ', '_'), feed.replace(' ', '_').replace('http://', '').replace('/', '_'))
  14
  15         def storeBlog(self, blog):
  16                 name    = self.__create_name__(blog.blogTitle, blog.feedURL)
  17                 # write the blog to disk
  18                 try:
  19                         cPickle.dump(blog, open(os.path.join('cache', name), 'w'))
  20                 except:
  21 #                       sys.stderr.write('DEBUG: CacheHandler: Item could not be written to cache\n')
  22                         pass
  23
  24         def getBlog(self, title, feed):
  25                 name    = self.__create_name__(title, feed)
  26                 # attempt to read the blog from disk
  27                 try:
  28                         blog    = cPickle.load(open(os.path.join('cache', name)))
  29                 except:
  30                         blog    = None
  31 #                       sys.stderr.write('DEBUG: CacheHandler: Could not read item from cache\n')
  32                 return blog
  33
  34 class CacheObject:
  35         "Stores Blog objects"
  36         def __init__(self):
  37                 self.etag       = None
  38                 self.date       = None
  39         def __ne__(self, other):
  40                 return self.etag != other.etag or self.date != other.date