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When an attacker sends an http post request, he sets the Content-Length to a large value in the request header and sends the http body to the web server at a very slow speed, byte by byte. The web server always needs to maintain the connection with the client and wait for the data transmission to end. Because the content-length is set to a large value and the http body transmission speed is very slow, attackers can occupy this connection for a long time.吴臣道：至于项声率军压境，是因为我曾经率军前去接应，尽管我们有和他们交战。In the above code, we use three functions, order500, order200, orderNormal to handle its own business logic, If the current own function cannot handle things, We pass it to the following function to handle it. By analogy, Until there is a function that can handle him, Otherwise, the responsibility chain mode will leave the chain directly, telling that it cannot be processed and throwing an error prompt. Although the above code can be used as the responsibility chain mode, we can see from the above code that the Order500 function depends on functions such as Order200, so there must be this function, which also violates the open-closed principle in object-oriented. Let's continue to understand writing flexible and detachable responsibility chain nodes.大靖迎来了长达三十年的英武盛世。故事以失散多年的亲兄弟做背景，讲三兄弟因1997年的金融风暴而各散东西，长大后重聚却发现冲散他们一家人的原因，原来埋藏着极大的阴谋。夏天行从英国调职香港，第一项任务就是保护网络教主张非凡，更让对方多次化险为夷。何铁男是位过气拳手，遇上热血拳击教练陈铃，并在其鼓励下重踏擂台。与此同时，铁男加入私人保镖行列，与天行成为同事。天行渐渐发现自己跟非凡、似乎有着无形的感应，三人竟是亲生兄弟，为了查出亲生父母之死而陷入危险之中。