Question

我的index.js中有一个router.post，我试图从用户那里得到一个输入，然后将用户引导到另一个名为question.ejs的页面。 Question.ejs有一个名为question.js的js，用于从网上查看用户的相关文章并以html格式显示它们。问题是我的question.ejs在我的请求完成之前加载，我没有要显示的内容。另一个奇怪的事情，我必须按两次才能使一切正常工作......这一切都很难解释，但我制作了一个关于我的问题的视频，我希望你能帮助我。

我已经制作了几个控制台日志，我已经列出了他们所说的内容，空白旁边的数字表示终端中控制台日志的顺序。

这是我的index.js代码：

var express = require('express');
var router = express.Router();
var news = require('../news.json');
var newsQuestion = require('../newsQuestion.json');
var bodyParser = require('body-parser');


/* GET home page. */
router.get('/', function(req, res, next) {
   res.render('index', {
       title: 'Express',
       news: news
   });
});

var parse = require('./parse');




router.use(bodyParser.urlencoded({ extended: true }));

router.post('/questionUser', function(req,res){

newsQuestion.question.txt = req.body.id;
//var question = require('./question');

question = require('./question');
router.use('/question',question);

console.log("this is after router.use: ", newsQuestion.bbc.title); => 
3**undefined**

res.redirect('question');


});


module.exports = router;

这是我的问题代码.js

var express = require('express');
var router = express.Router();
var news = require('../news.json');
var newsQuestion = require('../newsQuestion.json');
var bodyParser = require('body-parser');
var request = require('request');
var cheerio = require('cheerio');



var linkName = 'http://www.bbc.co.uk/search?
q='+newsQuestion.question.txt+'&sa_f=search-product&filter=news&suggid=';
console.log('this is before request: ', newsQuestion.bbc.title); => 
1**undefined**

request(linkName, function (error, response, html) {
    console.log('This is inside of request but before the actual 
    scrapping'); => 4**undefined**

    var titleArray = [];
    var linkArray = [];
    var img = [];
    if (!error && response.statusCode == 200) {
        var $ = cheerio.load(html);
        $('a', 'h1').each(function () { 
           var title = $(this).text().trim();
           var link = $(this).attr('href');
           if (title.length != 0) {

               titleArray.push(title);
               linkArray.push(link);
           }
        });
        $('img').each(function () { //#siteTable is a the context and a.title is within the context.
            img.push($(this).attr('src'));
        });

        console.log('This is inside request: ', newsQuestion.bbc.title); => 5*undefined* 

        newsQuestion.bbc.imgUrl = img[0];
        newsQuestion.bbc.title = titleArray[0];
        newsQuestion.bbc.url = linkArray[0];
        console.log(newsQuestion.bbc.title); => 6*Chile moves towards legalizing abortion in limited cases*


    }
});

console.log('this is after request: ',newsQuestion.bbc.title); => 2**undefined**


router.get('/', function(req, res, next) {
    res.render('question');
});

这是我的终端：

"C:\Program Files\JetBrains\WebStorm 2017.1.4\bin\runnerw.exe" "C:\Program 
Files\nodejs\node.exe" "C:\Users\Archie 
Jugdersuren\WebstormProjects\summaproject_trial3 - Copy (3)\bin\www"
this is inside parse
GET / 304 9.783 ms - -
GET /stylesheets/style.css 304 1.505 ms - -
this is before request:  undefined
this is after request:  undefined
this is after router.use:  undefined
POST /questionUser 302 14.087 ms - 60
GET /question 304 1.673 ms - -
GET /stylesheets/style.css 304 0.417 ms - -
This is inside of request but before the actual scrapping
This is inside request:  undefined
Chile moves towards legalising abortion in limited cases

以下是我描述我的问题（HD）的视频：

https://www.youtube.com/watch?v=y1VSu1DylFQ

谢谢。

Answer 1

是的我想通了..它是一种盗版，我只做了两个独立的功能..一个持有请求而另一个持有res.render，我确保res.render等待请求被调用时为3秒。我认为有足够的时间来完成请求....如果有更好的方法请告诉我。

res.render没有等待我的请求函数加载

1 个答案: