error

[au333333]

Future testProxy(String proxyUrl) async {
var server;

try {
  server = await shelf_io.serve(
    proxyHandler(proxyUrl),
    '181.204.31.17',
    89456,
  );
  print('Proxying atttttttttttttttttttttttttttttttttttttt');
} catch (e) {
  print('Proxying at 失败://$e');
}

print('Proxying at http://${server.address.host}:${server.port}');

}

---

I/flutter (30001): Proxying at 失败://SocketException: Failed to create server socket (OS Error: Cannot assign requested address, errno = 99), address = 111.204.31.117, port = 15901
E/flutter (30001): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: NoSuchMethodError: The getter 'address' was called on null.