Bearer token request http flutter

Question

I need to send my token for my API. I save my token in SharedPreferences and I can recupered this. My API need one, with the Bearer but how do ?

I tested with Authorization, Http etc.

Methods To save in SP

Future<bool> setToken(String value) async {     final SharedPreferences prefs = await SharedPreferences.getInstance();     return prefs.setString('token', value);   }    Future<String> getToken() async {     final SharedPreferences prefs = await SharedPreferences.getInstance();     return prefs.getString('token');   }    Future<Candidate> candidateAuth({Map map}) async {     String url = 'http://10.0.2.2:3000/v1/api/auth/candidate';     await http         .post(url,             headers: {               'Content-type': 'application/json',               'Accept': 'application/json'             },             body: jsonEncode(map))         .then((response) {       if (response.statusCode == 201) {         token = Candidate.fromJson(json.decode(response.body)).token;         Candidate().setToken(token);         return Candidate.fromJson(json.decode(response.body));       } else {         throw Exception('Failed auth');       }     });   } } 

My API Call :

 Future<List<Theme>> getThemes() async {     String url = 'http://10.0.2.2:3000/v1/api/theme';     String token;     Candidate().getToken().then((value) {       token = value;     });     final response = await http.get(url, headers: {       'Content-Type': 'application/json',       'Accept': 'application/json',       'Authorization': 'Bearer $token',     });     print('Token : ${token}');     print(response);      if (response.statusCode == 200) {       List themesList = jsonDecode(response.body);       List<Theme> themes = [];       for (var themeMap in themesList) {         themes.add(Theme.fromJson(themeMap));       }       return themes;     } else {       throw Exception('Failed to load themes');     }   }  

My API return error 401 : unauthorized

Answer 1

token might not be set by the time it invokes http.get. Change it to

    String token = await Candidate().getToken();     final response = await http.get(url, headers: {       'Content-Type': 'application/json',       'Accept': 'application/json',       'Authorization': 'Bearer $token',     });     print('Token : ${token}');     print(response); 

So that it is for sure set with right value.