def cache_data(self, host, path, response, filesize=-1):
"""
Cache prepare data caching.
Based on the mode, a sha256 sum is used to store data on disk.
FIXME: incomplete download will be sent if the same file is asked.
"""
cache_allowed = self.check_cache_allowed(host, path)
if not cache_allowed:
SCLogger.cache.debug('Not allowed: {0}{1}'.format(host, path))
return self.cache_bypass(response)
else:
cached_file_path = self.get_cache_filepath(host, path)
cache_file_path_tmp = self.get_cache_filepath(host, path) + '.tmp'
cached = self.check_cached_data(
cached_file_path, filesize=filesize)
if cached:
cache_hit = True
SCLogger.cache.info('Hit: {0}{1}'.format(host, path))
streamer = Streamer.data_cached_streamer(cached_file_path)
else:
cache_hit = False
SCLogger.cache.info('Miss: {0}{1}'.format(host, path))
streamer = Streamer.data_cacher_streamer(
response, cache_file_path_tmp)
return cache_hit, cached_file_path, streamer
def cache_bypass(self, response):
cache_hit = False
cached_file_path = None
streamer = Streamer.data_direct_streamer(response)
return cache_hit, cached_file_path, streamer