4.0/src/main/back/sandTable/udpServer.js

const dgram = require("dgram");
import { getmainWindow } from "../../index";
let server;
let Store = require("electron-store");
let store = new Store();
let sandTable_udp_server_port = "sandTable_udp_server_port";
function Init() {
  if (server) {
    server.close();
    server = null;
  }
  let port = GetUdpServerPort().port; //获取本地存储的udp端口
  server = dgram.createSocket("udp4");
  server.on("listening", () => {
    const address = server.address();
    console.log(`server running ${address.address}:${address.port}`);
  });

  server.on("message", (msg, remoteInfo) => {
    console.log(
      `udp server got ${msg} from ${remoteInfo.address}:${remoteInfo.port}`
    );
    // logger.info(msg.toString())
    // server.send('world', remoteInfo.port, remoteInfo.address)
    // ['json','string']
    let ModeIndex=1
    try {
      let positions = [];
      var str = msg.toString();
      //角度
      let angle = 45;
      if(ModeIndex==0){
        let s=JSON.parse(str)
        if (typeof s == "string") s = JSON.parse(s);
        console.log(s);

        // if(s.hasOwnProperty("Placemark")){
        if (s.Placemark.hasOwnProperty("Point")) {
          let arr = s.Placemark.Point.coordinates.split(",");
          let position = {
            lng: Number(arr[0]),
            lat: Number(arr[1]),
            alt: Number(arr[2]) || 0,
          };
          if (arr.length > 2) position.alt = arr[2];
          if (arr.length > 3) angle = arr[3];
          positions.push(position);
        } else
        {
          let coordinates =
              s.Placemark.Polygon.outerBoundaryIs.LinearRing.coordinates;
          const parseCoordinates = (coords) => {
            return coords.split(" ").map((pair) => {
              const [lng, lat] = pair.split(",").map(Number);
              return { lng, lat };
            });
          };
          positions = parseCoordinates(coordinates);
        }
        getmainWindow().webContents.send(
            sandTable_udp_server_port,
            positions,
            angle
        );
      }else if(ModeIndex==1){
        // 点位码
        let key=str.slice(0,-1)
        // 反馈指令的后缀  K或G
        let status=str.split(key)[1]
          getmainWindow().webContents.send(
              sandTable_udp_server_port+"_str",
              key,
              status
          );

      }


      // }else{
      //     console.log("内容不正确");

      // }
    } catch (err) {
      console.log(err);
    }
  });
  server.on("error", (err) => {
    console.log("server error", err);
  });
  console.log("port",port)
  server.bind(port);
  sendMsg("AFFG")
}
function sendMsg(val) {
  let msg;
  let port = store.get("sandTable_udp_client_port")||60000;
  let ip = store.get("sandTable_udp_client_host");
  server.send(val, port, ip);
  return
  let num = val.toString().split("");
  let swit = Number(num.pop());
  if (swit == 1 || swit == 0) {
    let cnt = num.join("");
    if (cnt == "FF") {
      const message = Buffer.from([0xff, Number(swit)]);
      server.send(message, port, ip);
      msg = "发送成功";
    } else {
      let exp = /^[+-]?\d*(\.\d*)?(e[+-]?\d+)?$/;
      if (exp.test(cnt)) {
        let cntHex = cnt.toString(16);
        let switHex = swit.toString(16);
        const message = Buffer.from([cntHex, switHex], "hex");
        console.log("message",message)
        server.send(message, port, ip);
        msg = "发送成功";
      } else {
        msg = "接受失败";
      }
    }
  }
  return msg;
}
/*更新udpserver端口*/
function UpdateUdpServerPort(port) {
  store.set(sandTable_udp_server_port, port);
  //写进本地缓存
  //重新启动udpserver
  Init();
}

/*获取本地主机端口*/
function GetUdpServerPort() {
  //从本地缓存获取
  let port = 6000;
  let server_port = store.get(sandTable_udp_server_port);
  if (!server_port) {
    store.set(sandTable_udp_server_port, port);
  } else {
    port = server_port;
  }
  let host = getHostIP();
  console.log("GetUdpServerPort",port)
  return { port, host };
}
function getHostIP() {
  const os = require("os");
  const interfaces = os.networkInterfaces();
  let hostIP = "";
  console.log(interfaces);

  for (const networkInterface in interfaces) {
    if (networkInterface.indexOf("以太网") > -1) {
      const iface = interfaces[networkInterface];
      for (let i = 0; i < iface.length; i++) {
        const { address, family, internal } = iface[i];
        if (family === "IPv4" && !internal) {
          hostIP = address;
          break;
        }
      }

      if (hostIP) {
        break;
      }
    }
  }

  return hostIP;
}

export { GetUdpServerPort, UpdateUdpServerPort, Init, sendMsg };