Question 75248 in Flutter Question posted in
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How to send Get request with authorization (JWT token) headers in Flutter

I want to send JWT Bearer token to the API (ASP.NET Core API) to complete the authorization. I have the following codes:

//get
  Future<dynamic> get(String api) async {
    var url = Uri.parse(baseUrl + api);
    String? token = await SecureStorage().readSecureStorage('token');
    var headers = {
      "Content-Type": "application/json",
      "Accept": "application/json",
      "Authorization": "Bearer $token"
    };

    var response = await http.get(url, headers: headers);
    if (response.statusCode == 200) {
      return response;
    } else {
      print(token);
      //Throw Exceptionp
    }
  }

When I test this code, the status code of the response is still 401. I checked this post but I could not solve it. How can I fix this?

Update: I used jwt.io to decode my token.

The header:

{
  "alg": "http://www.w3.org/2001/04/xmldsig-more#hmac-sha512",
  "typ": "JWT"
}

The payloads:

"http://schemas.xmlsoap.org/ws/2005/05/identity/claims/nameidentifier": "alex2020",
  "http://schemas.microsoft.com/ws/2008/06/identity/claims/role": "developer",
  "UserId": "5",
  "exp": 1682964030
}
Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    The problem is that await SecureStorage().readSecureStorage('token'); creates two "s in the token string.

    I solved the problem by removing " from token. The complete code is:

    Future<dynamic> get(String api) async {
    var url = Uri.parse(baseUrl + api);
    String? token = await SecureStorage().readSecureStorage('token');
    if (token != null) {
      token = token.replaceAll(RegExp('"'), '');
    }
    Map<String, String> headers = {
      'Content-Type': 'application/json; charset=UTF-8',
      'Authorization': 'Bearer $token'
    };
print('Bearer $token');
    var response = await http.get(url, headers: headers);
    if (response.statusCode == 200) {
      return response;
    } else {
      //Throw Exception
    }
  }

  2. 0

    Since the error is not clear try using single quotes, i remember long time ago faced something similar and it was single quotes that fix it

    'Authorization': 'Bearer $token'
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