The Last-Modified entity header field value is often used as a cache validator.
Last-Modified实体头部字段值通常用作一个缓存验证器。
It is considered a good practice to execute these lines once and cache the validator instances.
执行一次这些代码并缓存验证器实例是一个好的实践。
It is considered a good practice to execute these lines once and cache the validator instances.
执行一次这些代码并缓存验证器实例是一个好的实践。
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