const superAgent = require('superagent')//superagent是nodejs里一个非常方便的客户端请求代理模块(类似ajax)，当你想处理get,post,put,delete,head请求时,你就应该想起该用它了.
const cheerio = require('cheerio')//为服务器特别定制的，快速、灵活、实施的jQuery核心实现.
const fs = require('fs')
const path = require('path')const testUrl = "http://ah.10086.cn/m"//测试链接 function getLinkByUrl(url){var readLink = new Promise(function(resolve,reject){superAgent.get(testUrl).end((err,res)=>{if (err){console.log('无效地址111')reject('无效地址222')}else{console.log('=========html=============\n ',res.text)let $ = cheerio.load(res.text)let obj = {title:'',linkArry:[],count:0}obj.title = $('title').text()$('a').each(function(ind,element){let href = $(element).attr('href')||''let name = $(element).text().trim()let a = {name,href}obj.linkArry.push(a)obj.count++});resolve(obj);}})})return readLink}function writeJsonFile(data){let promise = new Promise(function(resolve,reject){fs.exists('./data',function(exists){if(!exists){console.log('data文件夹不存在。。。')fs.mkdir('./data',function(err){if (err) return console.log(err)console.log("文件夹创建成功");var file = path.join(__dirname,`data/${data.title}.json`)fs.writeFile(file,JSON.stringify(data),function(err){if(err){return reject('json文件创建失败。。。')}else{resolve('json文件创建成功！')}})})}else{console.log('data文件夹存在！')fs.exists(`./data/${data.title}.json`,function(exists){if(!exists){console.log('json文件不存在。。。')var file = path.join(__dirname,`data/${data.title}.json`)fs.writeFile(file,JSON.stringify(data),function(err){if(err){return reject('json文件创建失败2。。。')}else{resolve('json文件创建成功2！')}})}else{resolve('json文件存在！')}})}})})return promise
}getLinkByUrl(testUrl).then(function(resolve){let obj = resolveconsole.log('=============resolve1=',obj)return writeJsonFile(obj)},function(reject){console.log('=============reject1=',reject)}).then(function(resolve){console.log('===========resolve2=',resolve)},function(reject){console.log('===========resolve2=',reject)}).catch(function(err){console.log('=========err=',err)})

{"title": "安徽移动个人触屏版网厅","linkArry": [{"name": "","href": "javascript:void\n\n(window.location.href='http://ah.10086.cn/mpad/pad/num/number_list.html');"},{"name": "","href": "javascript:void\n\n(window.location.href='http://ah.10086.cn/mpad/pad/num/number_list.html');"},{"name": "+充话费","href": ""},{"name": "+充流量","href": ""},{"name": "业务办理","href": "http://ah.10086.cn/m/pages/pad/operate/openBusiIndex.html"},{"name": "手机卖场","href": "http://ah.10086.cn/mpad/pad/index.html"},{"name": "宽带专区","href": "http://ah.10086.cn/m/pages/pad/kdzq/index.html"},{"name": "选号入网","href": "http://ah.10086.cn/mpad/pad/num/number_list.html"},{"name": "流量专区","href": "http://ah.10086.cn/m/pages/pad/operate/flowZQ/index.html"},{"name": "流量红包","href": "http://ah.10086.cn/m/pages/draw/downloadkhd/downloadkhd.html?code=4&&WT.mc_ev=GXHXZY4"},{"name": "4G特惠","href": "http://ah.10086.cn/dt/khd"},{"name": "下载手厅","href": "http://ah.10086.cn/dt/khd"},{"name": "","href": "http://ah.10086.cn/dt/khd"},{"name": "","href": "http://ah.10086.cn/mpad/pad/act/haokarwy/index2.html"},{"name": "","href": "http://ah.10086.cn/mpad/hhg"},{"name": "","href": "http://ah.10086.cn/m/pages/draw/broadpromotion/index.html"},{"name": "","href": "http://ah.10086.cn/zsyyt/ahmobile/download/mobileDownLoadApk.do"},{"name": "","href": ""},{"name": "马上下载","href": "http://ah.10086.cn/zsyyt/ahmobile/download/mobileDownLoadApk.do"}],"count": 19
}