Javascript 从url获取JSON的节点JS在代码的其余部分之后执行

我想从节点JS代码中的URL获取JSON。代码运行良好，但由于执行的异步性质，执行顺序混乱

var http = require("https");

var number = 37302;

// these functions need to execute is sequence.    

console.log('Before API Call');

var response = fetchJson(number);
console.log(response);

console.log('After API Call');  



function fetchJson(number)
{        

    var url = 'https://example.com/api/getactionitems/' + number;

    http.get(url, function(res){
        var body = ''; 

        res.on('data', function(chunk){
            body += chunk; 
            console.log('JSON Retrieved.');               
        });

        res.on('end', function(){

            console.log('Parsing JSON');

            var APIResponse = JSON.parse(body);

            var Name = APIResponse.EmpName;
            var outstring = APIResponse.ActionItem;                
            return ('Hi ' + Name + ', Your action Items are: '+ outstring);            
        });
    })
    .on('error', function(e){
      return ("Got an error while fetching data.");
    });

}

执行此代码时，输出字符串的顺序如下所示：

Before API Call
undefined
After API Call
JSON Retrieved.
Parsing JSON

如何更正执行顺序，使顺序如下所示：

Before API Call
JSON Retrieved.
Parsing JSON
<Outpt from the JSON parsing>
After API Call

API调用之前的

检索到JSON。
解析JSON
API调用后

Hi Shirish，谢谢，但由于某种原因，此解决方案不会打印“API调用后”字符串。您在结尾处得到了什么console.log“获取数据时出错”。或者“Hi”+Name+”，您的操作项是：“+Outstring我收到此错误：TypeError:res不是IncomingMessage的函数。（d:\Development\NodeJSProjects\assistant.js:42:13）在IncomingMessage.emit（events.js:215:7）在endReadableNT（_stream_readable.js:1184:12）在processtick和rejections（internal/process/task_queues.js:80:21）很抱歉再次打扰您：-（但是现在响应是这样的。在API调用之前检索到JSON.Parsing JSON Promise{}）API Calli再次编辑答案后，我确信这会起作用Hi Shirish，谢谢，但由于某种原因，此解决方案不会打印“API调用后”字符串。最后您得到了什么console.log“获取数据时出错”或者“Hi”+Name+”，您的操作项是：“+Outstring我收到此错误：TypeError:res不是IncomingMessage的函数。（d:\Development\NodeJSProjects\assistant.js:42:13）在IncomingMessage.emit（events.js:215:7）在endReadableNT（_stream\u readable.js:1184:12）在ProcessTicks和Rejections（internal/process/task_queues.js:80:21）很抱歉再次打扰您：-（但是现在的响应是这样的。在API调用JSON检索之前。解析JSON承诺{}在API Calli再次编辑答案之后，我确信这会起作用

var http = require("https");

var number = 37302;

// these functions need to execute is sequence.    


console.log('Before API Call');

fetchJson(number).then(function(res){

console.log(res);

console.log('After API Call');
}).catch(function(e){console.log('err',e)});



function fetchJson(number)
{        
return new Promise(function(resolve,reject){
    var url = 'https://example.com/api/getactionitems/' + number;

    http.get(url, function(res){
        var body = ''; 

        res.on('data', function(chunk){
            body += chunk; 
            console.log('JSON Retrieved.');               
        });

        res.on('end', function(){

            console.log('Parsing JSON');

            var APIResponse = JSON.parse(body);

            var Name = APIResponse.EmpName;
            var outstring = APIResponse.ActionItem;                
            resolve('Hi ' + Name + ', Your action Items are: '+ outstring);            
        });
    })
    .on('error', function(e){
      reject("Got an error while fetching data.");
    });
});

}