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This topic created in 3534 days ago, the information mentioned may be changed or developed.
看 Symfony 框架，发现 HttpKernel 分了 MASTER_REQUEST 和 SUB_REQUEST ，而且 kernel 做 handle() 时还有个请求栈 requestStack ，一个 url 不是对应一个 Request 请求嘛，为什么还有子请求这个概念？是程序内发出的请求？这个子请求的应用场景是怎样的？主要是为了解决什么问题啊？
求解！
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ZYWJ Aug 24, 2016  1
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likezun Aug 25, 2016 1
我觉得核心就是：
The only difference internally is that some listeners (e.g. security) may only act upon the master request. Each listener is passed some sub-class of KernelEvent, whose isMasterRequest() can be used to check if the current request is a "master" or "sub" request. |
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