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However, this method has great limitations. XMLHttpRequest requests are usually used for asynchronous refresh of local pages in Ajax methods. Not all requests are suitable to be initiated by this class, and the pages obtained through this class of requests cannot be recorded by browsers, thus carrying out operations such as forward, backward, refresh and collection, which brings inconvenience to users. In addition, for legacy systems that do not have CSRF protection, to use this method to protect, to change all requests to XMLHttpRequest requests, this is almost to rewrite the entire website, which is undoubtedly unacceptable.I have been studying DDOS attacks recently and have read through the book "King of Destruction-DDOS Attacks and Prevention". The book is very detailed about DDOS attack methods and prevention, which is recommended to read, and summarizes the DDOS attack methods in this book.Not bad, although it's over这是一个美丽善良的孤女与青梅竹马的恋人历经二十年爱情与命运的波折共同寻找幸福的故事。 　　十五岁的少女秦明真因为一场泥石流失去了科考队的父母，年幼的她被这场事故的责任人叶培德收养。不料，明真在叶家处处受叶培德的妻子胡美丽的刁难，冷漠的家庭环境，让她对和同样在泥石流中失去了父亲的林震产生了深深的同病相怜的情愫。林震也一直对这个小女孩有着深深的好感。在共同的生活中，叶家的儿子明辉对明真动了真情，而妹妹明珠却喜欢上了林震，因为嫉妒明真她也同母亲一样，不给明真好脸色。 　　明辉和林震因为追求明真发生了激烈的争执，在一次激烈的打斗中，林震被明辉失手推下山崖。以为自己犯了杀人罪的明辉离家出走，并且意外地遇到了一场车祸。家人以为他在车祸中身亡。然而摔落山崖的林震并没有死，却因为明辉之死的内疚转校消失了。原来五叔就是‘铁笔丹青五柳先生？晚辈听田夫子提过的。该剧目标鲜明的将视角锁定在都市时尚家庭中。一个外人眼中完美的时尚家庭背后，其实埋伏着许多的情感矛盾，父母间看似成熟的婚姻，实际面临着张国立在《手机》一片中表现的“审美疲劳”。这对每一对婚姻来说都是一道“坎儿”，能否顺利地迈过去，是对婚姻的巨大考验。当这种“审美疲劳”又遭遇到正值青春期儿女的懵懂的恋情时，充满矛盾的人物关系就在“家庭”这个小小的舞台上展开了《流星》讲述为了让如夜空中星星般的艺人们发光发亮，在背后流血、流泪、流汗的人们的故事。