const Koa = require('Koa');
const app = new Koa();

app.use(async(ctx)=>{
    let url = ctx.url;
    //从request中获取get请求
    let request = ctx.request;
    let req_query = request.query;//返回的是格式化好的参数对象 query:{user:"jspang",age:"18"}
    let req_queryString = request.querystring; //返回的是请求字符串 "user=japang&age=18"
    //从ctx中获取get请求
    let ctx_query = ctx.query;
    let ctx_queryString = ctx.querystring;
    ctx.body = {
        url,
        req_query,
        req_queryString,
        ctx_query,
        ctx_queryString
    }
})
app.listen(3000,()=>{
    console.log('server is starting at port 3000')
})
//访问 http://127.0.0.1:3000?user=jspang&age=18