Solian/lib/utils/http.dart

87 lines
2.8 KiB
Dart

import 'dart:convert';
import 'package:http/http.dart' as http;
import 'package:solian/utils/services_url.dart';
class HttpClient extends http.BaseClient {
final bool isUnauthorizedRetry;
final Future<String> Function()? onUnauthorizedRetry;
final Function(String atk, String rtk)? onTokenRefreshed;
final _client = http.Client();
HttpClient({
this.isUnauthorizedRetry = true,
this.onUnauthorizedRetry,
this.onTokenRefreshed,
String? defaultToken,
String? defaultRefreshToken,
}) {
currentToken = defaultToken;
currentRefreshToken = defaultRefreshToken;
}
String? currentToken;
String? currentRefreshToken;
Future<String> refreshToken(String token) async {
final res = await _client.post(
getRequestUri('passport', '/api/auth/token'),
headers: {'Content-Type': 'application/json'},
body: jsonEncode({'refresh_token': token, 'grant_type': 'refresh_token'}),
);
if (res.statusCode != 200) {
var message = utf8.decode(res.bodyBytes);
throw Exception('An error occurred when trying refresh token: $message');
}
final result = jsonDecode(utf8.decode(res.bodyBytes));
currentToken = result['access_token'];
currentRefreshToken = result['refresh_token'];
if (onTokenRefreshed != null) {
onTokenRefreshed!(currentToken!, currentRefreshToken!);
}
return currentToken!;
}
@override
Future<http.StreamedResponse> send(http.BaseRequest request) async {
request.headers['Authorization'] = 'Bearer $currentToken';
final res = await _client.send(request);
if (res.statusCode == 401 && currentToken != null && isUnauthorizedRetry) {
if (onUnauthorizedRetry != null) {
currentToken = await onUnauthorizedRetry!();
} else if (currentRefreshToken != null) {
currentToken = await refreshToken(currentRefreshToken!);
} else {
final result = await http.Response.fromStream(res);
throw Exception(utf8.decode(result.bodyBytes));
}
http.BaseRequest newRequest;
if (request is http.Request) {
newRequest = http.Request(request.method, request.url)
..encoding = request.encoding
..bodyBytes = request.bodyBytes;
} else if (request is http.MultipartRequest) {
newRequest = http.MultipartRequest(request.method, request.url)
..fields.addAll(request.fields)
..files.addAll(request.files);
} else {
throw Exception('unsupported request type to auto retry');
}
newRequest
..persistentConnection = request.persistentConnection
..followRedirects = request.followRedirects
..maxRedirects = request.maxRedirects
..headers.addAll(request.headers)
..headers['Authorization'] = 'Bearer $currentToken';
return await _client.send(newRequest);
}
return res;
}
}