node实现爬虫

node实现爬虫

var express = require('express');
var app = express();
var request = require('request');
var cheerio = require('cheerio');

app.get('/', function(req, res) {

    request('http://www.jd.com', function(error, response, body) {
        if (!error && response.statusCode == 200) {
            $ = cheerio.load(body);
            res.json({
                cat: $('.cate_menu_item a.cate_menu_lk').text()
            });
        }
    })
});

var server = app.listen(3003, function() {
    console.log('listening at 3003');
});