def gen_timed_link(relative_path, secret_key, timeout, type):
start_time = '%08x' % (time.time() - 10)
stop_time = '%08x' % (time.time() + int(timeout))
hashable = secret_key + relative_path + start_time + stop_time
if type == 'md5':
hashed = python.md5(hashable).hexdigest()
else:
hashed = python.sha1(hashable).hexdigest()
return '%s%s%s' % (hashed, start_time, stop_time)
def gen_timed_link(relative_path, secret_key, timeout, type):
start_time = '%08x' % (time.time() - 10)
stop_time = '%08x' % (time.time() + int(timeout))
hashable = secret_key + relative_path + start_time + stop_time
if type == 'md5':
hashed = python.md5(hashable).hexdigest()
else:
hashed = python.sha1(hashable).hexdigest()
return '%s%s%s' % (hashed, start_time, stop_time)
def getIdentifier(self, path):
"""
The returned identifier is a digest of the path encoded in hex string.
The hash function used is SHA1.
It caches the identifiers in a dictionary indexed by path and with
a maximum number of entry specified by the constant ID_CACHE_MAX_SIZE.
@return: an identifier for path.
"""
ident = self._identifiers.get(path, None)
if ident is None:
sha1Hash = python.sha1()
sha1Hash.update(self._cachePrefix + path)
ident = sha1Hash.digest().encode("hex").strip('\n')
# Prevent the cache from growing endlessly
if len(self._identifiers) >= ID_CACHE_MAX_SIZE:
self._identifiers.clear()
self._identifiers[path] = ident
return ident
