flatter json.decode问题<；！doctype html>；错误

我正在尝试将stripe支付集成到我的Flatter项目和后端Laravel中。由于某种原因，我在json.decode上遇到了错误

E/flatter（10999）：[错误：flatter/lib/ui/ui\u dart\u state.cc（157）] 未处理的异常：FormatException:意外字符（位于 特征1）E/颤振（10999）：

支付服务

class PaymentService {
  Repository _repository;

  PaymentService(){
    _repository = Repository();
  }

  makePayment(Payment payment) async {
    return await _repository.httpPost('make-payment', payment.toJson());
  }
}

拉威尔码

public function makePayment(Request $request)
    {
        \Stripe\Stripe::setApiKey('sk_test_7422pw1lMsdRfN2FaPmfFKlt00AtiIJD9O');
        
        $token = Token::create([
            'card'=>[
                'number'=>$request-input('cardNumber'),
                'exp_month'=>$request-input('expiryMonth'),
                'exp_year'=>$request-input('expiryYear'),
                'cvc'=>$request-input('cvcNumber')
                ]
            
            ]);

\Stripe\PaymentIntent::create([
  'amount' => 1000,
  'currency' => 'inr',
  'source'  => $token,
  'receipt_email' => $request->input('email'),
]);
    }

错误

E/flatter（10999）：[错误：flatter/lib/ui/ui\u dart\u state.cc（157）]未处理的异常：FormatException:意外字符（在字符1处）
E/颤振（10999）：
E/颤振（10999）：^
E/颤振（10999）：
E/flatter（10999）：#0_ChunkedJsonParser.fail（dart:convert patch/convert_patch.dart:1394:5）
E/flatter（10999）：#1 ChunkedJsonParser.parseNumber（dart:convert patch/convert_patch.dart:1261:9）
E/flatter（10999）：#2 _ChunkedJsonParser.parse（dart:convert patch/convert_patch.dart:926:22）
E/flatter（10999）：#3(省道：转换补丁/转换补丁。省道：31:10）
E/flatter（10999）：#4 JsonDecoder.convert（dart:convert/json.dart:495:36）
E/flatter（10999）：#5jsoncodec.decode（dart:convert/json.dart:153:41）
E/flatter（10999）：#6 34;付款屏幕状态。"付款（包装：factory2homes/screens/payment"屏幕。dart:160:23）
E/颤振（10999）：
E/flatter（10999）：#7#u PaymentScreenState.build。（包装：factory2homes/screens/payment_screen.dart:142:23）
E/颤振（10999）：#8(InkResponseEstate.)(handleTap)(包装：颤振/src/材料/墨水)井。省道：706:14)
E/颤振（10999）：#9#InkResponseState.build。（包装：颤振/src/材料/墨水井。省道：789:36）
E/flatter（10999）：#10 GestureRecognitizer.invokeCallback（包：flatter/src/signatures/Recognitizer.dart:182:24）
E/flatter（10999）：#11 TapGestureRecognitor.handleTapUp（包：flatter/src/signatures/tap.dart:486:11）
E/flatter（10999）：#12 BaseTapgestureRecognitor.#检查（包：flatter/src/signatures/tap.dart:264:5）
E/flatter（10999）：#13 BaseTapgestureRecognitor.AcceptPirse（包：flatter/src/pirses/tap.dart:236:7）
E/flatter（10999）：#14 GestureArenaManager.sweep（包：flatter/src/signatures/arena.dart:156:27）
E/flatter（10999）：#15 GestureBinding.handleEvent（包：flatter/src/signatures/binding.dart:222:20）
E/flatter（10999）：#16 GestureBinding.dispatchEvent（包：flatter/src/signatures/binding.dart:198:22）
E/flatter（10999）：#17个手势绑定。#手点事件（包装：flatter/src/signatures/binding.dart:156:7）
E/flatter（10999）：#18个手势绑定。(u flushPointerEventQueue（包装：flatter/src/signatures/binding.dart:102:7）
E/flatter（10999）：#19手势绑定。"handlePointerDataPacket（包：flatter/src/signatures/binding.dart:86:7）
E/flatter（10999）：#20 rootrunnary（dart:async/zone.dart:1138:13）
E/flatter（10999）：#21 _CustomZone.runUnary（dart:async/zone.dart:1031:19）
E/flatter（10999）：#22 _CustomZone.runUnaryGuarded（dart:async/zone.dart:933:7）
E/颤振（10999）：#23_调用1（省道：ui/钩子。省道：273:10）
E/flatter（10999）：#24 dispatchPointerDataPacket（dart:ui/hooks.dart:182:5）
E/颤振（10999）：

当服务器返回

html

正文或在处理您的请求时服务器端发生错误时，会发生此错误。尝试使用调试器并查看请求的

响应

，查看响应状态是否为

200

，同时检查响应体，查看服务器为您的请求发送的内容

同时尝试将您

jsonDecode

包装在

try catch

中，以处理未来的异常

class PaymentService {
  Repository _repository;

  PaymentService(){
    _repository = Repository();
  }

  makePayment(Payment payment) async {
    return await _repository.httpPost('make-payment', payment.toJson());
  }
}

public function makePayment(Request $request)
    {
        \Stripe\Stripe::setApiKey('sk_test_7422pw1lMsdRfN2FaPmfFKlt00AtiIJD9O');
        
        $token = Token::create([
            'card'=>[
                'number'=>$request-input('cardNumber'),
                'exp_month'=>$request-input('expiryMonth'),
                'exp_year'=>$request-input('expiryYear'),
                'cvc'=>$request-input('cvcNumber')
                ]
            
            ]);

\Stripe\PaymentIntent::create([
  'amount' => 1000,
  'currency' => 'inr',
  'source'  => $token,
  'receipt_email' => $request->input('email'),
]);
    }

E/flutter (10999): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: FormatException: Unexpected character (at character 1)
E/flutter (10999): <!doctype html>
E/flutter (10999): ^
E/flutter (10999): 
E/flutter (10999): #0      _ChunkedJsonParser.fail (dart:convert-patch/convert_patch.dart:1394:5)
E/flutter (10999): #1      _ChunkedJsonParser.parseNumber (dart:convert-patch/convert_patch.dart:1261:9)
E/flutter (10999): #2      _ChunkedJsonParser.parse (dart:convert-patch/convert_patch.dart:926:22)
E/flutter (10999): #3      _parseJson (dart:convert-patch/convert_patch.dart:31:10)
E/flutter (10999): #4      JsonDecoder.convert (dart:convert/json.dart:495:36)
E/flutter (10999): #5      JsonCodec.decode (dart:convert/json.dart:153:41)
E/flutter (10999): #6      _PaymentScreenState._makePayment (package:factory2homes/screens/payment_screen.dart:160:23)
E/flutter (10999): <asynchronous suspension>
E/flutter (10999): #7      _PaymentScreenState.build.<anonymous closure> (package:factory2homes/screens/payment_screen.dart:142:23)
E/flutter (10999): #8      _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:706:14)
E/flutter (10999): #9      _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:789:36)
E/flutter (10999): #10     GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:182:24)
E/flutter (10999): #11     TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:486:11)
E/flutter (10999): #12     BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:264:5)
E/flutter (10999): #13     BaseTapGestureRecognizer.acceptGesture (package:flutter/src/gestures/tap.dart:236:7)
E/flutter (10999): #14     GestureArenaManager.sweep (package:flutter/src/gestures/arena.dart:156:27)
E/flutter (10999): #15     GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:222:20)
E/flutter (10999): #16     GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:198:22)
E/flutter (10999): #17     GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:156:7)
E/flutter (10999): #18     GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:102:7)
E/flutter (10999): #19     GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:86:7)
E/flutter (10999): #20     _rootRunUnary (dart:async/zone.dart:1138:13)
E/flutter (10999): #21     _CustomZone.runUnary (dart:async/zone.dart:1031:19)
E/flutter (10999): #22     _CustomZone.runUnaryGuarded (dart:async/zone.dart:933:7)
E/flutter (10999): #23     _invoke1 (dart:ui/hooks.dart:273:10)
E/flutter (10999): #24     _dispatchPointerDataPacket (dart:ui/hooks.dart:182:5)
E/flutter (10999):