HTTP

HTTP cookie

key deference between HTTP/2 with HTTP/1.x

1. binary, instead of textual;
2. fully multiplexed, instead of ordered and blocking;
3. can therefore use one connection for parallelism;
4. uses header compression to reduce overhead;
5. allows servers to “push” responses proactively into client caches

这里面具体需要前后端开发者实际操作的就是 server push, 服务器主动推资源

HTTP access control(CORS)

• 概述: HTTP协议提供了一组Header字段来声明哪些来源具有权限访问哪些资源.