Question

我对nodeJS很新，来自.net世界。我试图提出通用请求来质疑我的网络服务。我会简化代码以便于理解：

var request = require('request');

var genericReq = function (apiUrl) {
    // Configure the request
    var options = {
        url: apiUrl,
        method: 'GET',
        headers: headers,
    }

    var headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36',
        'Content-Type': 'application/x-www-form-urlencoded'
    }
    var json;
    var trackingItems = [];

    // contact with web api, get list of tracking items FK
    request(options, function (error, response, body) {
        if (!error && response.statusCode == 200) {
            // Print out the response body
            json = JSON.parse(body);
            for (i = 0; i < json.length; i++) {
                trackingItems.push(json[i].fkItemId);
            }
            //console.log(trackingItems);
            return trackingItems;
        }
        else {
            console.log("error connect to web api server");
        }
    });
}

function invokeReq() {
    var value = genericReq('http://localhost:51405/api/trackingitemsapi');
    console.log(value);
};

invokeReq();

当：

console.log(trackingItems);

我可以看到trackingItems数组。

然而：

function invokeReq() {
    var value = genericReq('http://localhost:51405/api/trackingitemsapi');
    console.log(value);
};

导致＆＃39; undefined＆＃39;

从请求返回值时，Node.JS未定义

0 个答案: