Javascript module.exports中的Node.js我的变量定义不足

我的变量“整”未定义

getStudents.js

var http = require('http');

module.exports = {
'sendResults': function(){
    http.get(' http://gs-class.com/nodejs/students.php', function(res){
    var whole = '';
    res.on('data',function(chunk){
        whole+=chunk;
    });
    res.on('end', function(){
        return whole;
    });
    });
    }
}

var getStudents = require('./getStudents');
var fs = require('fs');
var results = getStudents.sendResults();
console.log(results);

var getStudents = require('./getStudents');
var fs = require('fs');
getStudents.sendResults(function(result) {
    console.log(result);
});

var http = require('http');

    module.exports = {
        'sendResults': function(callback) {
            http.get(' http://gs-class.com/nodejs/students.php', function(res) {
                var whole = '';
                res.on('data', function(chunk) {
                    whole += chunk;
                });
                res.on('end', function() {
                    callback(whole)
                });
            });
        }
    }

studWrite.js

var http = require('http');

module.exports = {
'sendResults': function(){
    http.get(' http://gs-class.com/nodejs/students.php', function(res){
    var whole = '';
    res.on('data',function(chunk){
        whole+=chunk;
    });
    res.on('end', function(){
        return whole;
    });
    });
    }
}

var getStudents = require('./getStudents');
var fs = require('fs');
var results = getStudents.sendResults();
console.log(results);

var getStudents = require('./getStudents');
var fs = require('fs');
getStudents.sendResults(function(result) {
    console.log(result);
});

var http = require('http');

    module.exports = {
        'sendResults': function(callback) {
            http.get(' http://gs-class.com/nodejs/students.php', function(res) {
                var whole = '';
                res.on('data', function(chunk) {
                    whole += chunk;
                });
                res.on('end', function() {
                    callback(whole)
                });
            });
        }
    }

当我运行studWrite.js程序时，我的变量“整”是未定义的。请帮忙。

试试这个：

studWrite.js

var http = require('http');

module.exports = {
'sendResults': function(){
    http.get(' http://gs-class.com/nodejs/students.php', function(res){
    var whole = '';
    res.on('data',function(chunk){
        whole+=chunk;
    });
    res.on('end', function(){
        return whole;
    });
    });
    }
}

var getStudents = require('./getStudents');
var fs = require('fs');
var results = getStudents.sendResults();
console.log(results);

var getStudents = require('./getStudents');
var fs = require('fs');
getStudents.sendResults(function(result) {
    console.log(result);
});

var http = require('http');

    module.exports = {
        'sendResults': function(callback) {
            http.get(' http://gs-class.com/nodejs/students.php', function(res) {
                var whole = '';
                res.on('data', function(chunk) {
                    whole += chunk;
                });
                res.on('end', function() {
                    callback(whole)
                });
            });
        }
    }

getStudents.js

var http = require('http');

module.exports = {
'sendResults': function(){
    http.get(' http://gs-class.com/nodejs/students.php', function(res){
    var whole = '';
    res.on('data',function(chunk){
        whole+=chunk;
    });
    res.on('end', function(){
        return whole;
    });
    });
    }
}

var getStudents = require('./getStudents');
var fs = require('fs');
var results = getStudents.sendResults();
console.log(results);

var getStudents = require('./getStudents');
var fs = require('fs');
getStudents.sendResults(function(result) {
    console.log(result);
});

var http = require('http');

    module.exports = {
        'sendResults': function(callback) {
            http.get(' http://gs-class.com/nodejs/students.php', function(res) {
                var whole = '';
                res.on('data', function(chunk) {
                    whole += chunk;
                });
                res.on('end', function() {
                    callback(whole)
                });
            });
        }
    }

---

您需要使用异步方法（回调、承诺）来解决问题

可能重复您从回调返回。正在工作！！！Thnx。我是node.js的新手，所以我必须研究你的代码better@UlukbekAbylbekov在编写Node.js之前，您应该具有丰富的异步编程知识。无论如何如果这对你有效，请接受答案。