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src/main/app.ts

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+let net = require("net");
+const express = require("express");
+const path = require("path");
+const { ipcMain } = require('electron');
+// const bodyParser = require("body-parser");
+import { GetHomeDir } from "./config";
+
+let SERVER_PORTS = 55110;
+
+/**
+ * 检测端口是否被占用
+ * @param port
+ * @param cb
+ */
+
+function portIsOccupied(port, cb) {
+  // 创建服务并监听该端口
+  port = Number(port);
+  let server = net.createServer().listen(port);
+
+  server.on("listening", function() {
+    // 执行这块代码说明端口未被占用
+    server.close(); // 关闭服务
+    console.log("端口【" + port + "】 可用"); // 控制台输出信息
+    SERVER_PORTS = port;
+    cb(port);
+  });
+
+  server.on("error", function(err) {
+    if (err.code === "EADDRINUSE") {
+      // 端口已经被使用
+      console.log("端口【" + port + "】 被占用");
+      portIsOccupied(++port, cb);
+    }
+  });
+}
+
+let apps;
+let availablePort
+
+function createApp() {
+  apps = express();
+  // app.use(bodyParser.json());
+  // app.use(bodyParser.urlencoded({ extended: true }));
+
+  let prefix =
+    process.env.NODE_ENV === "development"
+      ? ""
+      : "resources/app.asar/out/renderer/";
+  let static_path = ["./", "src/renderer/public"];
+  let home_dir = GetHomeDir();
+  static_path.forEach((p) => {
+    apps.use(
+      express.static(
+        path.join(path.join(home_dir, prefix), p) /*{maxAge: 60 * 1000 * 5}*/
+      )
+    );
+  });
+}
+function start() {
+  createApp();
+  portIsOccupied(SERVER_PORTS, (port) => {
+    // avilablePort挂载全局
+    // console.log(apps); 
+    apps.listen(port);
+    availablePort = port;
+    // console.log("global.sharedObject", global.avilablePort);
+    global.sharedObject.availablePort = port;
+    // ipcRenderer.invoke("set-global-variable", "avilablePort", avilablePort);
+  });
+}
+//获取项目根目录
+// function GetHomeDir() {
+//   let HOME_DIR = process.cwd()
+
+//   if (process.env.NODE_ENV === 'production') {
+//     let arr = process.execPath.replaceAll("\\", "/").split("/")
+//     arr.pop()
+//     HOME_DIR = arr.join("/")
+//   }
+//   return HOME_DIR
+// }
+
+ipcMain.handle('get-available-port', () => {
+  return availablePort;
+});
+
+export { apps, start };