Invalid character in cookie value

[alexandrefett]

Invalid character in cookie value, code unit: '34'

Dio dio = new Dio();
  dio.options = new Options(
      baseUrl: Endpoint.BASE_URL,
      connectTimeout: 5000,
      receiveTimeout: 10000,
      // 5s
      headers: {
        "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36",
        "Accept-Encoding": "gzip"
      }
  );
Future basePage() async {
    Response response = await client.get("https://www.instagram.com");
    print(response.data);
  }

[wendux]

Could you paste the stacktrace ?

[alexandrefett]

Unhandled exception:
FormatException: Invalid character in cookie value, code unit: '34'
#0 _Cookie._validate (dart:io/http_headers.dart:995)
#1 new _Cookie (dart:io/http_headers.dart:844)
#2 new Cookie (dart:io/http.dart:868)
#3 Instagram.basePage... (package:instascrapper/instascrapper.dart:45:31)

[jave1987]

i have same error

[jave1987]

[ERROR:topaz/lib/tonic/logging/dart_error.cc(16)] Unhandled exception:
DioError [DioErrorType.DEFAULT]: FormatException: Invalid character in cookie name, code unit: '58'

[wendux]

@jave1987 what's your request url ?

[jave1987]

I fix it , there is '@' in url

[alexdelorenzo]

Can confirm the same error with Instagram and other sites.

edit: This seems to stem from an issue in dart's standard library. I created a push request with a fix here: dart-lang/sdk#33765

[jackxuechen]

@thismachinechills
I also encountered this problem when using dio in the project of flutter. How should I use the code you submitted

[Blankeer]

I have encountered the same problem, how to solve it ...
DioError [DioErrorType.DEFAULT]: FormatException: Invalid character in cookie value, code unit: '34'

[wendux]

In my box I run the code as follows:

  try {
    Response r = await dio.get("https://www.instagram.com");
    print(r.headers);
  }on DioError catch(e){
     print(e);
     print(e.response.statusCode);
  }

It works well，and the log:

connection: keep-alive
cache-control: private, no-cache, no-store, must-revalidate
set-cookie: sessionid=""; Domain=instagram.com; expires=Thu, 01-Jan-1970 00:00:00 GMT; Max-Age=0; Path=/
set-cookie: sessionid=""; Domain=.instagram.com; expires=Thu, 01-Jan-1970 00:00:00 GMT; Max-Age=0; Path=/
set-cookie: sessionid=""; Domain=i.instagram.com; expires=Thu, 01-Jan-1970 00:00:00 GMT; Max-Age=0; Path=/
set-cookie: sessionid=""; Domain=.i.instagram.com; expires=Thu, 01-Jan-1970 00:00:00 GMT; Max-Age=0; Path=/
set-cookie: sessionid=""; Domain=www.instagram.com; expires=Thu, 01-Jan-1970 00:00:00 GMT; Max-Age=0; Path=/
set-cookie: sessionid=""; Domain=.www.instagram.com; expires=Thu, 01-Jan-1970 00:00:00 GMT; Max-Age=0; Path=/
set-cookie: sessionid=""; expires=Thu, 01-Jan-1970 00:00:00 GMT; Max-Age=0; Path=/
set-cookie: rur=PRN; Domain=.instagram.com; Path=/
set-cookie: mid=W6B4uAAEAAHsy45UUgwJdX2vQLf5; Domain=.instagram.com; expires=Fri, 15 Sep 2028 04:02:00 GMT; Max-Age=315360000; Path=/
set-cookie: mcd=3; Domain=.instagram.com; expires=Fri, 15 Sep 2028 04:02:00 GMT; Path=/
set-cookie: csrftoken=ZnlfxdwG4v7zmFE3Kz5wmuPPcG8HQN4g; expires=Tue, 17-Sep-2019 04:02:00 GMT; Max-Age=31449600; Path=/; Secure
date: Tue, 18 Sep 2018 04:02:00 GMT
content-encoding: gzip
vary: Accept-Language, Cookie, Accept-Encoding
strict-transport-security: max-age=60
pragma: no-cache
content-type: text/html; charset=utf-8
content-language: en
content-security-policy-report-only: report-uri /security/csp_report/; default-src * data: blob:; script-src https://*.instagram.com https://*.cdninstagram.com https://*.facebook.com https://*.fbcdn.net https://*.facebook.net wss://*.instagram.com 'unsafe-inline' 'unsafe-eval' blob: data: 'self'; style-src data: blob: 'unsafe-inline' *; connect-src https://*.instagram.com https://*.cdninstagram.com https://*.facebook.com https://*.fbcdn.net https://*.facebook.net 'self' chrome-extension://boadgeojelhgndaghljhdicfkmllpafd; block-all-mixed-content; frame-ancestors 'self'; frame-src 'self' https://staticxx.facebook.com https://www.facebook.com https://web.facebook.com https://connect.facebook.net https://m.facebook.com; object-src 'none'
content-length: 7935
x-frame-options: SAMEORIGIN
expires: Sat, 01 Jan 2000 00:00:00 GMT

my dart version:

Dart VM version: 2.1.0-dev.4.0 (Fri Sep 7 16:44:38 2018 +0200) on "macos_x64"

It seems to be the lower version Dart SDK bug, and has been fixed dart-lang/sdk@a9ad427.

[wendux]

Fixed, dart-lang/sdk#33765

[jinyus]

This happens again when using the cookie_manager interceptor.

Stacktrace:

E/flutter (23638): [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: DioError [DioErrorType.DEFAULT]: FormatException: Invalid character in cookie value, code unit: '92' (at character 3)
E/flutter (23638): "{\"1.1.1.11\": 33576}:1kbxcM:p0LIbXZDKdd3sLDH3dlI"
E/flutter (23638):   ^
E/flutter (23638):
�[38;5;248mE/flutter (23638): #0      DioMixin._request._errorInterceptorWrapper.<anonymous closure>.<anonymous closure>.<anonymous closure>�[39;49m
 package:dio/src/dio.dart

Steps to reproduce:

import 'package:dio/dio.dart';
import 'package:dio_cookie_manager/dio_cookie_manager.dart';
import 'package:cookie_jar/cookie_jar.dart';

var dio = Dio(BaseOptions(followRedirects: true));
var cookieJar = CookieJar();
dio.interceptors.add(CookieManager(cookieJar));
var resp = await dio.get('https://www.instagram.com/p/CGQ8sl2DwTj/')