cve_scan_v2.py 文件源码

def _get_cache(ttl, cache_path):
    '''
    If url contains valid cache, returns it, else returns empty list.
    '''
    # Check if we have a valid cached version.
    try:
        cached_time = os.path.getmtime(cache_path)
    except OSError:
        return []
    if current_time() - cached_time < ttl:
        log.debug('%s is less than ttl', cache_path)
        try:
            with open(cache_path) as json_file:
                loaded_json = json.load(json_file)
                return loaded_json
        except IOError:
            return []
        except ValueError:
            log.error('%s was not json formatted', cache_path)
            return []
    else:
        log.debug('%s was older than ttl', cache_path)
        return []