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最近在看《图解HTTP》，如题，这个正好与http请求有关，也是面试中及其常见的题目

  1. 输入url后，客户端向服务端发起请求，浏览器解析url里的域名，并进行 DNS解析出对应ip，路由查找这个地址
  2. 找到ip后，tcp/ip建立连接，客户端发送请求的过程是在报文首部增加信息，服务端接收请求的过程是将报文首部增加的信息去掉
  3. 服务端收到请求后会将资源发送给客户端，此时客户端会去接收响应，浏览器对内容进行解析
  4. 若浏览器接收到的是html页面，解析过程： image
    • 构建dom树
    • 构建css om
    • 整合dom和css om，构建render树
    • 布局render树
    • 绘制render树

注：有不足之处后续补足

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