FormatException: Invalid port (at character 16)

[paulobreim]

Here is my code: HttpServer.bind(InternetAddress.anyIPv4, port).then((server) { print('Servindo em ${server.address}:${server.port}'); server.listen((HttpRequest request) { handleGetRequest(request); // check de URL request.response ..close(); }); }); I don't know why, but some times, the program stop with: FormatException: Invalid port (at character 16) http://0.0.0.0:81login.cgi Sure that I am using port 81, but the port does not import. This error occur even if there are anybody connecting.

Debuging the app I can see that the program is waiting for a connection in the line server.listen((HttpRequest request)

From time to time, simply gives the message without anyone connecting

Another fact is that I am not put import 'package:http_server/http_server.dart'; because when I put, I receive message that Target of URI doesn't exist