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whatwewant/关于keep-alive的一些理解和资料.md

Last active May 18, 2018 16:38
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关于keep-alive的一些理解和资料.md

keep-alive

是什么

  • 省略

为什么

  • 1 keep-alive 目的是在过期时间内保持浏览器端与服务器端间的连接
  • 2 是TCP层面的，保持TCP连接不关闭，而不是保持http连接不关闭;
  • 3 keep-alive是串行的不是并行的;

怎么做

  • 从HTTP 1.1开始，浏览器请求默认会带上Connection: keep-alive请求头；
  • 服务器会返回Connection: keep-alive，如果要关闭，服务器要返回Connection: close;

对比

  • keep-alive与http2的多路复用(multiplexing)技术: keep-alive是串行的，多路复用是并行的

相关资源

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