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1 import os
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2 import os.path
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3 import codecs
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4
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5
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6 class SimpleCache(object):
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7 def __init__(self, base_dir):
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8 if not os.path.isdir(base_dir):
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9 os.makedirs(base_dir, 0755)
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10 self.base_dir = base_dir
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11
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12 def isValid(self, path, time):
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13 cache_time = self.getCacheTime(path)
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14 if cache_time is None:
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15 return False
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16 if isinstance(time, list):
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17 for t in time:
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18 if cache_time < t:
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19 return False
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20 return True
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21 return cache_time >= time
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22
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23 def getCacheTime(self, path):
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24 cache_path = self.getCachePath(path)
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25 try:
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26 return os.path.getmtime(cache_path)
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27 except os.error:
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28 return None
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29
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30 def has(self, path):
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31 cache_path = self.getCachePath(path)
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32 return os.path.isfile(cache_path)
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33
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34 def read(self, path):
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35 cache_path = self.getCachePath(path)
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36 with codecs.open(cache_path, 'r', 'utf-8') as fp:
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37 return fp.read()
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38
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39 def write(self, path, content):
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40 cache_path = self.getCachePath(path)
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41 cache_dir = os.path.dirname(cache_path)
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42 if not os.path.isdir(cache_dir):
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43 os.makedirs(cache_dir, 0755)
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44 with codecs.open(cache_path, 'w', 'utf-8') as fp:
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45 fp.write(content)
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46
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