onRequest method
The callback will be executed before the request is initiated.
If you want to continue the request, call handler.next
.
If you want to complete the request with some custom data,
you can resolve a Response
object with handler.resolve
.
If you want to complete the request with an error message,
you can reject a DioError
object with handler.reject
.
Implementation
@override
onRequest(RequestOptions options, RequestInterceptorHandler handler) async {
//没有网络
var connectivityResult = await (Connectivity().checkConnectivity());
if (connectivityResult == ConnectivityResult.none) {
return handler.resolve(Response(
data: ResultData('', false, Code.networkError),
requestOptions: options));
}
return super.onRequest(options, handler);
}