request抓取google的首页正常，抓取google搜索结果页就乱码，为什么呢？！

代码如下：

var request = require('request');
var cheerio = require('cheerio');
var http = require('http');


http.createServer(function (req, res) {
	request("http://www.google.com",function(error,response,body){
		if(!error && response.statusCode == 200){
			res.writeHead(200, {'Content-Type': 'text/html'}); 
			res.end(body);
		}
	})


}).listen(8080, "127.0.0.1");