cancel_request.dart

import 'dart:async';
import 'package:dio/dio.dart';

main() async {
  var dio = new Dio();
  // Token can be shared with different requests.
  CancelToken token = new CancelToken();
  // In one minute, we cancel!
  new Timer(new Duration(milliseconds: 200), () {
    token.cancel("cancelled");
  });

  // The follow three requests with the same token.
  var url1 = "https://accounts.google.com";
  var url2 = "https://www.facebook.com";
  var url3 = "https://www.baidu.com";

  dio
      .get(url1, cancelToken: token)
      .then((response) => print('${response.request.path}: succeed!'))
      .catchError(
    (e) {
      if (CancelToken.isCancel(e)) {
        print('$url1: $e');
      }
    },
  );

  dio
      .get(url2, cancelToken: token)
      .then((response) => print('${response.request.path}: succeed!'))
      .catchError((e) {
    if (CancelToken.isCancel(e)) {
      print('$url2: $e');
    }
  });

  dio
      .get(url3, cancelToken: token)
      .then((response) => print('${response.request.path}: succeed!'))
      .catchError((e) {
    if (CancelToken.isCancel(e)) {
      print('$url3: $e');
    }
  });
}