Flutter http headers

Try

 Map<String, String> requestHeaders = {       'Content-type': 'application/json',       'Accept': 'application/json',       'Authorization': '<Your token>'     };

You can try this:

Map<String, String> get headers => {        "Content-Type": "application/json",        "Accept": "application/json",        "Authorization": "Bearer $_token",      };

and then along with your http request for header just pass header as header

example:

Future<AvatarResponse> getAvatar() async {    var url = "$urlPrefix/api/v1/a/me/avatar";    print("fetching $url");    var response = await http.get(url, headers: headers);    if (response.statusCode != 200) {      throw Exception(          "Request to $url failed with status ${response.statusCode}: ${response.body}");    }    var avatar = AvatarResponse()      ..mergeFromProto3Json(json.decode(response.body),          ignoreUnknownFields: true);    print(avatar);    return avatar;  }

I have done it this way passing a private key within the headers. This will also answer @Jaward:

class URLS {    static const String BASE_URL = 'https://location.to.your/api';    static const String USERNAME = 'myusername';    static const String PASSWORD = 'mypassword';}

In the same .dart file:

class ApiService {    Future<UserInfo> getUserInfo() async {      var headers = {        'pk': 'here_a_private_key',        'authorization': 'Basic ' +           base64Encode(utf8.encode('${URLS.USERNAME}:${URLS.PASSWORD}')),        "Accept": "application/json"      };      final response = await http.get('${URLS.BASE_URL}/UserInfo/v1/GetUserInfo',        headers: headers);      if (response.statusCode == 200) {        final jsonResponse = json.decode(response.body);        return new UserInfo.fromJson(jsonResponse);      } else {        throw Exception('Failed to load data!');      }    }}