你如何中止节点模块？

Question

我有一个node.js（带快速）模块，它连接到twitter并根据用户在前端输入的搜索词来流式传输数据（参见：twitter.tweetStream(api, params, values, track, bridgeArray, usernameArray, scoreData);）。该模块在用户提交表单并执行/test时执行，但即使在他们离开/test后仍继续运行。它还与启动的任何新实例并行运行。

如果用户离开/test路线，有没有办法告诉模块停止运行？个

// Renders form on default Route
app.get('/', function(req, res){
    res.render('form');

});

// On form submission take data and passes it into twitter stream call as "track" object then renders the 'tweets' feed
app.post('/test',function(req,res){
    var track = req.body;
    twitter.tweetStream(api, params, values, track, bridgeArray, usernameArray, scoreData);
    res.render('tweets');
});

// Renders Tweets stored in "values object" onto a page to be called from tweets template
app.get('/tweets', function(req, res){

    res.render('home', {   
        profileImg: values.profileImg,
        userName: values.userName,
        screenName: values.screenName,
        text: values.text,
        timeStamp: values.timeStamp,        
        tweetScore: values.tweetScore,
//        totals: values.totals
    });

});

为了清晰起见，添加了完整的代码：

    var express = require('express');
var app = express();
//var http = require('http').Server(app);  // Not using
var exphbs  = require('express-handlebars');
var bodyParser = require('body-parser');
var twitter = require('./twitter.js');
var hue = require("./hue_control.js");

// Variable that control Twitter Calls
var api = 'statuses/filter';
var params = {slug:'REDACTED', owner_screen_name: 'REDACTED', skip_status: true};
var values = {};


app.engine('handlebars', exphbs({defaultLayout: 'main'}));
app.set('view engine', 'handlebars');
app.use(bodyParser());
app.use(express.static('public'));


// Checks for Hue bridge on local network gets IP and sets usename
var bridgeArray = [];
var usernameArray = [];
var scoreData = [];
var track = {};

hue.activate(bridgeArray, usernameArray);


// Renders form on default Route
app.get('/', function(req, res){
    res.render('form');
});

// On form submission take data and passes it into twitter stream call as "track" object then renders the 'tweets' feed
app.post('/tweets',function(req,res){
    track = req.body;
    res.render('tweets');
    twitter.tweetStream(api, params, values, track, bridgeArray, usernameArray, scoreData);    
});

// Renders Tweets stored in "values object" onto a page to be called from tweets template
app.get('/tweetstatic', function(req, res){
    res.render('home', {   
        profileImg: values.profileImg,
        userName: values.userName,
        screenName: values.screenName,
        text: values.text,
        timeStamp: values.timeStamp,        
        tweetScore: values.tweetScore,
    });
});

app.get('/totals', function(req, res){
    res.render('totals', {   
        tweetTotal: values.tweetTotal,
        score: values.score,
        color: values.color
    });
});

// App Settings
var server = app.listen(3000, function () {
  var host = server.address().address;
  var port = server.address().port;

  console.log('Example app listening at http://%s:%s', host, port);
});