def construct(path=defaults.CACHE_PATH, size=defaults.CACHE_SIZE):
log.msg("Initializing cache on %s (maxsize: %d Mb)" % (path, size))
cache = QNetworkDiskCache()
cache.setCacheDirectory(path)
cache.setMaximumCacheSize(size * 1024**2)
cache.cacheSize() # forces immediate initialization
return cache
