1.请求(ctx.request)的信息

    1. {
    2.     method: "GET",
    3.     url: "/",
    4.     header: {
    5.         host: "localhost:3000",
    6.         connection: "keep-alive",
    7.         cache-control: "max-age=0",
    8.         upgrade-insecure-requests: "1",
    9.         user-agent: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36",
    10.         accept: "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8",
    11.         accept-encoding: "gzip, deflate, br",
    12.         accept-language: "zh-CN,zh;q=0.9,en;q=0.8"
    13.     }
    14. }

    2.在上面我们确实请求了，koa2的request能对其处理，接受了一些信息，但是不利于对数据的处理.
    为此有ctx直接调用的情况,下面学习ctx.request中的直接操作.

    3.ctx.header 请求信息

    1. {
    2.     host: "localhost:3000",
    3.     connection: "keep-alive",
    4.     cache-control: "max-age=0",
    5.     upgrade-insecure-requests: "1",
    6.     user-agent: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36",
    7.     accept: "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8",
    8.     accept-encoding: "gzip, deflate, br",
    9.     accept-language: "zh-CN,zh;q=0.9,en;q=0.8"
    10. }

    4.很有趣，直接拿到的是 ctx.request.header.这对我们开发来说非常的方便和编写.

    5.ctx.headers 请求信息

    1. {
    2.     host: "localhost:3000",
    3.     connection: "keep-alive",
    4.     cache-control: "max-age=0",
    5.     upgrade-insecure-requests: "1",
    6.     user-agent: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36",
    7.     accept: "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8",
    8.     accept-encoding: "gzip, deflate, br",
    9.     accept-language: "zh-CN,zh;q=0.9,en;q=0.8"
    10. }

    6.ctx.headers和ctx.header测试的时候发现一样,有不同的地方吗？