koa2 爬虫
cheerio
const Koa = require('koa');
const app = new Koa();
const router=require('koa-simple-router');
const request = require('request');
const cheerio = require('cheerio');
app.use(router(_ => {
_.get("/", (ctx,next)=>{
ctx.set('Content-Type', 'text/html');
ctx.body = request('http://www.jikexueyuan.com', (error, response, body)=> {
if (!error && response.statusCode == 200) {
$= cheerio.load(body);
$.html(".aside-cList");
}
});
})
}))
app.listen(3000,()=>{
console.log("'Example app listening on port 3000!'");
});
