To watch the HTTP headers in action, let's build, install, and run an HTTP reverse proxy to cache the output of a small PHP application.
要查看HTTP报头如何工作，让我们构建、安装并运行一个HTTP反向代理来缓存一个小型PHP应用程序的输出。
Caching: The reverse proxy server can cache static content to provide better performance.
缓存：反向代理服务器可以缓存静态内容以提供更好的性能。
The scenario can be avoided by defining a configuration so that it will not cache anything served directly from a WebSeal reverse proxy server that performs redirects.
定义一种并不缓存从执行请求转发的 WebSeal 反向代理服务器直接提供的任何数据的配置，这样就可以避免以上情况。
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