Make {,back}space pan between the edges of a zoomed page.
[automanga.git] / manga / htcache.py
CommitLineData
f3ad0817
FT
1import os, md5, urllib, time
2pj = os.path.join
3
4class cache(object):
5 def __init__(self, dir):
6 self.dir = dir
7
8 def mangle(self, url):
9 n = md5.new()
10 n.update(url)
11 return n.hexdigest()
12
d6c0e189
FT
13 def miss(self, url):
14 s = urllib.urlopen(url)
15 try:
16 return s.read()
17 finally:
18 s.close()
19
f3ad0817
FT
20 def fetch(self, url, expire = 3600):
21 path = pj(self.dir, self.mangle(url))
22 if os.path.exists(path):
23 if time.time() - os.stat(path).st_mtime < expire:
24 with open(path) as f:
25 return f.read()
d6c0e189 26 data = self.miss(url)
f3ad0817
FT
27 if not os.path.isdir(self.dir):
28 os.makedirs(self.dir)
29 with open(path, "w") as f:
30 f.write(data)
31 return data
32
33home = os.getenv("HOME")
34if home is None or not os.path.isdir(home):
35 raise Exception("Could not find home directory for HTTP caching")
36default = cache(pj(home, ".manga", "htcache"))
37
38def fetch(url, expire = 3600):
39 return default.fetch(url, expire)