简单的百度搜索结果数量统计api

baidu.js

var cheerio = require('cheerio');
var http = require('http');
var iconv = require('iconv-lite');
var express = require('express');
var app = express();

app.get('/api/baidu/:keyword', function(req, res) {
	var keyword = req.param('keyword');
	var encodeKey = encodeURIComponent(keyword);
	var url = 'http://www.baidu.com/s?ie=utf-8&f=8&rsv_bp=0&rsv_idx=1&tn=baidu&wd=' + encodeKey + '&rsv_pq=d1bc678500027fae&rsv_t=b1baqnanzIu6%2B%2B6jgA5UgJY9hPGjPUfG2I03drYiQCZLKs41hn1TBNqN2tg&rqlang=cn&rsv_enter=1&rsv_sug3=14&rsv_sug1=13&rsv_sug7=100&rsv_sug2=0&inputT=1230&rsv_sug4=1231'
	http.get(url, function(sres) {
		var chunks = [];
		sres.on('data', function(chunk) {
			chunks.push(chunk);
		});
		sres.on('end', function() {
			var html = iconv.decode(Buffer.concat(chunks), 'utf-8');
			var $ = cheerio.load(html, {
				decodeEntities: false
			});
			var searchResult = parseFloat($('.nums').html().split('百度为您找到相关结果约')[1].split('个')[0].trim().replace(/\,/g,''));
			res.send(JSON.stringify({
				keyword: keyword,
				num: searchResult,
				msg:$('.nums').html().split('搜索工具')[1]
			}, null, 4));
		});
	});
});

app.listen(3000);