__init__.py 文件源码

def cache(self):
        # Remove annoying depcration warning from flask-cache
        from flask.exthook import ExtDeprecationWarning
        warnings.simplefilter('ignore', ExtDeprecationWarning)

        if hasattr(self, '_cache'):
            return self._cache
        if CACHE_BACKEND_URI == 'memory://':
            cache = Cache(app, config={'CACHE_TYPE': 'simple'})
        elif CACHE_BACKEND_URI.startswith('redis://'):
            try:
                from redis import from_url as redis_from_url
                redis_from_url(CACHE_BACKEND_URI)
            except:
                print('BAD REDIS URL PROVIDED BY (CACHE_BACKEND_URI)')
                exit(1)

            cache = Cache(app, config={
                'CACHE_TYPE': 'redis',
                'CACHE_REDIS_URL': CACHE_BACKEND_URI,
                'CACHE_DEFAULT_TIMEOUT': 0  # NEVER EXPIRES
            })

        cache.init_app(self.app)
        self._cache = cache
        return self._cache