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1
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import hashlib |
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2
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import threading |
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3
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from os import path |
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4
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5
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from django import template |
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6
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7
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from chat.settings import STATIC_URL, STATIC_ROOT, logging, DEBUG |
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8
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9
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register = template.Library() |
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10
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logger = logging.getLogger(__name__) |
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11
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12
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13
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class UrlCache(object): |
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14
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_md5_sum = {} |
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15
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_lock = threading.Lock() |
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16
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17
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@classmethod |
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18
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def get_md5(cls, file_name): |
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19
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try: |
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20
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if DEBUG: |
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21
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raise KeyError("Debug mode is on, forcing calculating") |
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22
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else: |
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23
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return cls._md5_sum[file_name] |
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24
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except KeyError: |
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25
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entry_name = file_name |
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26
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with cls._lock: |
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27
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try: |
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28
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key = '#root#' |
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29
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if key in file_name: |
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30
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file_name = file_name.split(key,1)[1] |
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31
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file_path = path.join(STATIC_ROOT, entry_name.replace(key, '')) |
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32
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prefix = '' |
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33
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else: |
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34
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file_path = path.join(STATIC_ROOT, file_name) |
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35
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prefix = STATIC_URL |
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36
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37
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md5 = cls.calc_md5(path.join(STATIC_ROOT, file_path))[:8] |
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38
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value = '%s%s?v=%s' % (prefix, file_name, md5) |
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39
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logger.info("Static file %s calculated md5 %s", file_name, md5) |
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40
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except: |
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41
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value = STATIC_URL + file_name |
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42
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logger.error("File %s not found, put url %s", file_name, value) |
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43
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cls._md5_sum[entry_name] = value |
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44
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return value |
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45
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46
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@classmethod |
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47
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def calc_md5(cls, file_path): |
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48
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with open(file_path, 'rb') as fh: |
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49
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m = hashlib.md5() |
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50
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while True: |
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51
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data = fh.read(8192) |
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52
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if not data: |
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53
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break |
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54
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m.update(data) |
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55
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return m.hexdigest() |
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56
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57
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58
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@register.simple_tag |
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59
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def md5url(file_name): |
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60
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return UrlCache.get_md5(file_name) |
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61
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Deathangel908 /
pychat
