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The Slowloris attack exploits a vulnerability in the web server (or an unreasonable parameter configuration) and directly causes a denial of service. Slowloris is an attack method proposed by famous Web security expert RSnake in 2009. Its principle is to send HTTP requests to the server at a very low speed. Since the Web Server has a certain upper limit on the number of concurrent connections, if these connections are maliciously occupied and not released, all connections of the Web Server will be occupied by malicious connections, thus new requests cannot be accepted, resulting in denial of service.I like what Sister Ping said: "I like to do one thing instead of insisting on doing one thing." Many people say that one must stick to it. If it grows in your blood and is as natural as eating and sleeping, it does not need to "stick to it" and just do it. Saying "stick to" is because you don't love enough, so you need to remind yourself all the time.陈启打断了林白的话。In fact, there are two types: parallel hairstyle mode and thread pool mode. Use a picture to describe the whole:State mode-Allows an object to automatically change its behavior when its internal state changes, and the object looks like it has changed its class. The specific structure diagram is as follows:In real life, observer mode can be seen everywhere, for example, subscribing to parade numbers in WeChat, subscribing to blogs and paying attention to friends in QQ microblog, all of which belong to the application of observer mode.