Simple GET API request in Flutter - rest

Question

I'm trying to use a simple GET requests in REST to flutter, but have an error
Code:
Future<Map> timeStamp() async {
const request =
"https://armariosinteligentes.com/api/v3/timestamp";
http.Response response = await http.get(request);
print(json.decode(response.body));
}
json: {"timestamp":1566397501}
Error:
E/flutter ( 7041): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: HandshakeException: Handshake error in client (OS Error:
E/flutter ( 7041): BLOCK_TYPE_IS_NOT_01(padding.c:108)
E/flutter ( 7041): PADDING_CHECK_FAILED(rsa_impl.c:641)
E/flutter ( 7041): public key routines(a_verify.c:105)
E/flutter ( 7041): CERTIFICATE_VERIFY_FAILED: certificate signature failure(handshake.cc:352)) E/flutter ( 7041):
#0 IOClient.send (package:http/src/io_client.dart:33:23) E/flutter ( 7041): <asynchronous suspension> E/flutter ( 7041):
#1 BaseClient._sendUnstreamed (package:http/src/base_client.dart:169:38) E/flutter ( 7041): <asynchronous suspension> E/flutter ( 7041):
#2 BaseClient.get (package:http/src/base_client.dart:32:7) E/flutter ( 7041):
#3 get.<anonymous closure> (package:http/http.dart:46:36) E/flutter ( 7041):
#4 _withClient (package:http/http.dart:166:20) E/flutter ( 7041): <asynchronous suspension> E/flutter ( 7041):
#5 get (package:http/http.dart:46:5) E/flutter ( 7041):
#6 timeStamp (package:armarios_inteligentes/screens/locker_screen.dart:196:34) E/flutter ( 7041): <asynchronous suspension> E/flutter ( 7041):
#7 LockerScreenState.build.<anonymous closure> (package:armarios_inteligentes/screens/locker_screen.dart:114:15) E/flutter ( 7041):
#8 _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:635:14) E/flutter ( 7041):
#9 _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:711:32) E/flutter ( 7041):
#10 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24) E/flutter ( 7041): #11 TapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:365:11) E/flutter ( 7041):
#12 TapGestureRecognizer.acceptGesture (package:flutter/src/gestures/tap.dart:312:7) E/flutter ( 7041):
#13 GestureArenaManager.sweep (package:flutter/src/gestures/arena.dart:156:27) E/flutter ( 7041):
#14 _WidgetsFlutterBinding&BindingBase&GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:222:20) E/flutter ( 7041):
#15 _WidgetsFlutterBinding&BindingBase&GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:198:22) E/flutter ( 7041):
#16 _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:156:7) E/flutter ( 7041):
#17 _WidgetsFlutterBinding&BindingBase&GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:102:7) E/flutter ( 7041):
#18 _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:86:7) E/flutter ( 7041):
#19 _rootRunUnary (dart:async/zone.dart:1136:13) E/flutter ( 7041):
#20 _CustomZone.runUnary (dart:async/zone.dart:1029:19) E/flutter ( 7041):
#21 _CustomZone.runUnaryGuarded (dart:async/zone.dart:931:7) E/flutter ( 7041):
#22 _invoke1 (dart:ui/hooks.dart:250:10) E/flutter ( 7041):
#23 _dispatchPointerDataPacket (dart:ui/hooks.dart:159:5) E/flutter ( 7041):

Answer 1

timeStamp() async {
final response =
await http.get('http://armariosinteligentes.com/api/v3/timestamp');
if (response.statusCode == 200) {
// If server returns an OK response, parse the JSON.
var jsonResponse = json.decode(response.body);
tempoStamp tempo = new tempoStamp.fromJson(jsonResponse);
var time = ('${tempo.timestamp}');
return time;
} else {
// If that response was not OK, throw an error.
throw Exception('Failed to load post');
}
}
Result: 1566411603

Answer 2

Try to remove the https and put http instead. And verify your connection, you need to know if you can call websites like this in your local...