add MainSums的socket

common/models/main-sum.js

 'use strict';
+var ws = require('nodejs-websocket')
+module.exports = function (Mainsum) {
 
-module.exports = function(Mainsum) {
+}
+var has = false
+function broadcast (server, msg) {
+  server.connections.forEach(function (conn) {
+    has = true
+    conn.sendText(JSON.stringify(msg))
+  })
+}
+var timer;
+var num = 0
+var server = ws.createServer(function (conn) {
+  conn.on('text', function (result) {
+    if (!has) {
+      num = parseInt(result)
+    }
+    if (timer) {
+      clearInterval(timer)
+    }
 
-};
+    timer = setInterval(function () {
+      num = num + Math.floor(Math.random() * (295 - 285 + 1) + 285)
+      broadcast(server, num)
+    }, 3000)
+
+  })
+  conn.on('error', function (code) {
+    console.log('异常关闭', code)
+  })
+  conn.on('close', function (code, reason) {
+    console.log('Connection closed')
+  })
+}).listen(5000)
\ No newline at end of file

package-lock.json

@@ -2009,6 +2009,11 @@
       "resolved": "https://registry.npmjs.org/nocache/-/nocache-2.1.0.tgz",
       "integrity": "sha512-0L9FvHG3nfnnmaEQPjT9xhfN4ISk0A8/2j4M37Np4mcDesJjHgEUfgPhdCyZuFI954tjokaIj/A3NdpFNdEh4Q=="
     },
+    "nodejs-websocket": {
+      "version": "1.7.2",
+      "resolved": "https://registry.npmjs.org/nodejs-websocket/-/nodejs-websocket-1.7.2.tgz",
+      "integrity": "sha512-PFX6ypJcCNDs7obRellR0DGTebfUhw1SXGKe2zpB+Ng1DQJhdzbzx1ob+AvJCLzy2TJF4r8cCDqMQqei1CZdPQ=="
+    },
     "nodemailer": {
       "version": "4.7.0",
       "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-4.7.0.tgz",

package.json

@@ -18,6 +18,7 @@
     "loopback-boot": "^2.6.5",
     "loopback-component-explorer": "^6.4.0",
     "loopback-connector-mysql": "^5.4.2",
+    "nodejs-websocket": "^1.7.2",
     "serve-favicon": "^2.0.1",
     "strong-error-handler": "^3.0.0"
   },