dart - Dart 中的 net::ERR_UNSAFE_PORT

Question

我正在使用 notepad++ 编写服务器端 dart 代码，我已经使用 dart 编辑器在服务器端 dart 代码中取得了成功。但是我同样认为我在使用notepad++的地方做了一个错误，因为浏览器中的 dart 中的 net::ERR_UNSAFE_PORT 完成了由命令提示符初始化的 Dart 服务器端，当我尝试访问 172....190 时，Bowser(dartium) 说上面那个错误!!!

服务器端代码

main() {
  HttpServer.bind("172...", 4045).then((server) {
    server.listen((res) {
      res.response.headers.add("Access-Control-Allow-Origin", "172.25.10.181");
      res.response.headers
          .add("Access-Control-Allow-Methods", "POST,GET,DELETE,PUT,OPTIONS");
      res.response.headers.add('Access-Control-Allow-Headers',
          'Origin, X-Requested-With, Content-Type, Accept,application/x-www-form-urlencoded');
      print('I am writing server side code');
    });
  });
}

客户端代码

req = new HttpRequest();

  req.open('get', 'http://172...:4045');

  req.send(data);

  req.onReadyStateChange.listen((_) {
    if (req.readyState == HttpRequest.DONE &&
        (req.status == 200 || req.status == 0)) {
     print(req.responseText);
    }
  });

Answer 1

这是处理此问题的最佳方法。

There some ports are reserved for specific protocols like 80 for HTTPand 22 for SSH etc. If you use that port for another kind of protocolyou will face this error. In my case, I'm using 6000 port for mybackend API server which was resolved. I just simply move 6000 port to7789 all stuff working as expected. Here are the list ports forspecific protocols that you may not violate. You need to use port other then this for your specific work.