javascript - 如何使用 NodeJS 不断更新网页？

Question

我对 NodeJS 相当陌生，我想知道如何让我的 Node 服务器不断更新网页。

所以我正在做的是从 Twitter 获取推文，现在我只想将它们全部显示在一个基本网页上。在第一次运行期间，它看起来像这样:

Name: ap. Text: RT @APCentralRegion: Yevgeny Yevtushenko, Russian poet who focused on war atrocities, dies in Oklahoma Name: ap. Text: A week after hundreds attended anti-government protests in Russia, police arrest dozens at unauthorized rallies. ...

但是，大约一分钟的时间间隔后，我收到以下错误消息:

response.write("*********End of One Interval*********")
                  ^
TypeError: Cannot read property 'write' of undefined

我的代码如下，请记住，当我在 createServer 中使用 tweet 函数时，它仍然显示出无法正确更新页面的相同行为，但是，终端窗口始终使用 console.log 正确更新

// Dependencies =========================
var  
    twit = require('twit'),
    config = require('./config');

var http = require("http");
var url = require("url");

var Twitter = new twit(config);


// FAVORITE BOT====================
// Heavily modified from original tutorial. 

var favoriteTweet = function(response, a, b){  

        var params = {
        screen_name: a,
        count: b,
//      q: '#aprilfools, #aprilfoolsday',  // REQUIRED
//      result_type: 'recent', //recent tweets only.
      //lang: 'en'
    }

      //console.log("Params: " + params.q);
      // find the tweet
      Twitter.get('statuses/user_timeline', params, function(err,data){

        // find tweets
          //console.log(data);
        var tweet = data; //.statuses for actual tweets. 
        //console.log(tweet);


        for(var result in tweet) {
            response.write("Name: " + a + ". Text: " + tweet[result].text + "\n");
            console.log("Resulting text: " + tweet[result].text);
            console.log("Created At: " + tweet[result].created_at);
        }  

        //console.log(tweet);
          response.write("*********End of One Interval*********")
        console.log("*********End of One Interval*********")    
      });
    }

http.createServer(function(request, response) {

    response.writeHead(200, {"Content-Type":"text/plain"});
        var params = url.parse(request.url, true).query;

        var a = params.name;
        var b = parseInt(params.count);


        // grab & 'favorite' as soon as program is running...
        favoriteTweet(response, a, b);  

        // 'favorite' a tweet in every 1 minute
        setInterval(favoriteTweet, 60000);


}).listen(9090);

Answer 1

您必须将参数传递到回调中。执行以下操作:

 setInterval(function(){
      favoriteTweet(response,a,b)
 }, 60000);