Scale Weight -> NodeJS via TCP Socket to JSON for Angular答案

【问题标题】：Scale Weight -> NodeJS via TCP Socket to JSON for AngularScale Weight -> NodeJS via TCP Socket to JSON for Angular
【发布时间】：2016-04-23 05:25:01
【问题描述】：

尝试（半成功）从 TCP 套接字中提取权重。然后我想将数据输出到 JSON 字符串，这样我就可以将它包装成一些角度。您可以在控制台中看到我正在接收权重，我最终会删除文本项的开头和结尾，因此输出看起来像：

{ "scaleA": '43636LG',"scaleB" 等......}

weightclient.js

'use strict'

var net = require('net');
var HOST = '192.168.1.17';
var PORT = 1337;
var client = new net.Socket(); 

var weight = function(){
    var weights = {};
    client.connect(PORT, HOST, function() {
        console.log('CONNECTED TO: ' + HOST + ':' + PORT);
        client.on('data', function(data) {
            // console.log('DATA: ' + data);
            weights.scaleA = data.toString();
            console.log(weights);
            client.destroy();
        });
        client.on('close', function() {
            console.log('Connection closed');
        });
    });
    return {
      weights  
    };
}();
console.log(weight);
module.exports = weight;

index.js

var express = require('express');
var router = express.Router();
var net = require('net');
var getweight = require('../weightclient.js');

/* GET home page. */
router.get('/', function(req, res, next) {
  res.render('index', { title: 'Express' });
});


router.get('/weight', function(req, res) {
    getweight.weight(function(err, data){
      console.log(data);  
    });
  });

module.exports = router;

控制台（输出）：

 node bin/www
{ weights: {} }
CONNECTED TO: 192.168.1.17:1337
{ scaleA: '\u0002   43636LG \r\n' }
Connection closed
GET /weight 500 2973.083 ms - 1131
GET /stylesheets/style.css 304 25.835 ms - -

网页输出：

getweight.weight is not a function

TypeError: getweight.weight is not a function
    at /home/pi/socketio-test/routes/index.js:13:15
    at Layer.handle [as handle_request] (/home/pi/socketio-test/node_modules/express/lib/router/layer.js:95:5)
    at next (/home/pi/socketio-test/node_modules/express/lib/router/route.js:131:13)
    at Route.dispatch (/home/pi/socketio-test/node_modules/express/lib/router/route.js:112:3)
    at Layer.handle [as handle_request] (/home/pi/socketio-test/node_modules/express/lib/router/layer.js:95:5)
    at /home/pi/socketio-test/node_modules/express/lib/router/index.js:277:22
    at Function.process_params (/home/pi/socketio-test/node_modules/express/lib/router/index.js:330:12)
    at next (/home/pi/socketio-test/node_modules/express/lib/router/index.js:271:10)
    at Function.handle (/home/pi/socketio-test/node_modules/express/lib/router/index.js:176:3)
    at router (/home/pi/socketio-test/node_modules/express/lib/router/index.js:46:12)

想法建议..还在学习node和js，不胜感激任何指针或参考婚姻。

【问题讨论】：

除非我遗漏了一些关键，否则您的 return { weights }; 是无效的 javascript。

标签： javascript angularjs json node.js sockets

【解决方案1】：

你必须有（我喜欢英语）：

响应数据包重量的服务器。（好的）
输出所有紧急情况的客户端。（好的）

在客户端定义：

var arr = []

和代码：

when response from server       arrive{
arr.push([data.name,data.weight])}

然后您可以编写其他代码。希望我正确理解了您的问题。

我的方法会为你节省很多调试时间。

错误btw在所需文件中，所以我无能为力，权重没有定义为函数，或者它以私有方式定义。

【讨论】：