[后端] webSocket demo跑通

test-code/.gitignore

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+node_modules

test-code/package-lock.json

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+{
+  "name": "test-code",
+  "version": "1.0.0",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "test-code",
+      "version": "1.0.0",
+      "license": "ISC",
+      "dependencies": {
+        "ws": "^8.11.0"
+      }
+    },
+    "node_modules/ws": {
+      "version": "8.11.0",
+      "resolved": "https://registry.npmmirror.com/ws/-/ws-8.11.0.tgz",
+      "integrity": "sha512-HPG3wQd9sNQoT9xHyNCXoDUa+Xw/VevmY9FoHyQ+g+rrMn4j6FB4np7Z0OhdTgjx6MgQLK7jwSy1YecU1+4Asg==",
+      "engines": {
+        "node": ">=10.0.0"
+      },
+      "peerDependencies": {
+        "bufferutil": "^4.0.1",
+        "utf-8-validate": "^5.0.2"
+      },
+      "peerDependenciesMeta": {
+        "bufferutil": {
+          "optional": true
+        },
+        "utf-8-validate": {
+          "optional": true
+        }
+      }
+    }
+  },
+  "dependencies": {
+    "ws": {
+      "version": "8.11.0",
+      "resolved": "https://registry.npmmirror.com/ws/-/ws-8.11.0.tgz",
+      "integrity": "sha512-HPG3wQd9sNQoT9xHyNCXoDUa+Xw/VevmY9FoHyQ+g+rrMn4j6FB4np7Z0OhdTgjx6MgQLK7jwSy1YecU1+4Asg==",
+      "requires": {}
+    }
+  }
+}

test-code/package.json

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+{
+  "name": "test-code",
+  "version": "1.0.0",
+  "description": "",
+  "main": "websocketTest.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "ws": "^8.11.0"
+  }
+}

test-code/websocketTest.js

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+'use strict';
+
+const WebSocket = require('ws');
+
+const webSocketUrl = 'ws://localhost:8002/websocket/1';
+
+global.ws = null; // WebSocket 实例对象
+
+/**
+ * 启动完毕，输出配置信息
+ */
+console.log("Start running ...", "process.env", process.env);
+
+function createWebSocket() {
+    //申请一个WebSocket对象，参数是服务端地址，同http协议使用http://开头一样，WebSocket协议的url使用ws://开头，另外安全的WebSocket协议使用wss://开头
+    global.ws = new WebSocket(webSocketUrl);
+
+    // 当WebSocket创建成功时，触发onopen事件
+    global.ws.onopen = function () {
+        console.log("webhook is open.");
+    }
+
+    // 当客户端收到服务端发送的关闭连接请求时，触发onclose事件
+    global.ws.onclose = function (e) {
+        console.log("webhook is close.");
+        console.log("未知错误被关闭，等待 1s 尝试重新建立连接...");
+        setTimeout(function () {
+            createWebSocket();
+        }, 1000);
+    }
+
+    // 如果出现连接、处理、接收、发送数据失败的时候触发onerror事件
+    global.ws.onerror = function (e) {
+        console.log(e.error);
+    }
+
+    // 当客户端收到服务端发来的消息时，触发onmessage事件，参数e.data包含server传递过来的数据
+    global.ws.onmessage = function (e) {
+        var data = JSON.parse(e.data);
+        console.log(data);
+    }
+}
+
+// 创建连接
+createWebSocket();