用node搭建了一個(gè)本地服務(wù)器，主要的功能是，接受Post請(qǐng)求，然后去sf上面爬數(shù)據(jù)返回，顯示的情況是，在cmd里面打印出來，顯示的是爬取成功，但是前臺(tái)接到的確實(shí)catch中的error2。
下面是代碼。

let http = require("http");
let url = require("url"); //解析get請(qǐng)求
let query = require("querystring"); //post請(qǐng)求相關(guān)
// let creep = require('./creep');

http.createServer(function(request,response){
    //post
    response.setHeader("Access-Control-Allow-Origin","*");
    response.setHeader(
          "Access-Control-Allow-Methods",
          "PUT, GET, POST, DELETE, HEAD, PATCH"
    );

    // var params = url.parse(request.url,true);

    let postData = "";
    request.addListener("data",function(chunk){
        postData += chunk;
    });

    //end 表示全部body接受完畢
    request.addListener("end",function(){
        creepDataForUrl().then(function(creepRes){
            response.end(creepRes);
        },function(e){
            console.log("fail");
        }).catch(function(e){
            console.log("error:" +JSON.stringify(e));
        })        
    });
}).listen(8011);

const https = require('https');
const cheerio = require('cheerio');

function creepDataForUrl(){
    return new Promise(function(resolve,rej){
        https.get('https://segmentfault.com', (res) => {
                  var data = '';
                  res.on('data', (chunk) => {
                    data += chunk;
                  });
                  res.on('end', () => {
                      let temp = getDataFromHtml(data);
                      console.log(temp.length);
                      resolve(temp);
                  })
            }).on('error', (e) => {
                  console.log("這里出錯(cuò)了:" + JSON.stringify(e));
                  rej && rej(e);
            });
    });
}

function getDataFromHtml(htmlData){
    let $ = cheerio.load(htmlData);
    let items = $("div.news-item.stream__item.clearfix");
    let resAry=[];
    items.each(function(index,item){
        let el = $(item);
        resAry.push({
            title:el.find(".news__item-info a").first().text(),
        });
    });
    return resAry;
}