403 (Forbidden) error on data request about nhentai_dart HOT 6 CLOSED

import 'package:fk_user_agent/fk_user_agent.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:nclientv3/constants/constants.dart';
import 'package:nclientv3/models/cook.dart';
import 'package:nclientv3/utils/utils.dart';
import 'package:webview_cookie_manager/webview_cookie_manager.dart';
import 'package:webview_flutter/webview_flutter.dart';

class NotARobotView extends StatefulWidget {
  const NotARobotView({super.key});

  static route() => MaterialPageRoute(
        builder: (context) => const NotARobotView(),
      );

  @override
  State<NotARobotView> createState() => _NotARobotViewState();
}

class _NotARobotViewState extends State<NotARobotView> {
  @override
  void initState() {
    super.initState();
  }

  final controller = WebViewController()
    ..setJavaScriptMode(JavaScriptMode.unrestricted)
    ..setBackgroundColor(const Color(0x00000000))
    ..setNavigationDelegate(
      NavigationDelegate(
        onPageStarted: (String url) async {
          final currentUserAgent = await WebViewController().runJavaScriptReturningResult('navigator.userAgent');

          // NOTE THIS! You need to save this value to use as your user agent!!!
          debugPrint(currentUserAgent.toString());
        },
        onUrlChange: (change) async {
          if (change.url == NHentaiConstants.url) {
            final realCookieManager = WebviewCookieManager();
            final gotCookies = await realCookieManager.getCookies(NHentaiConstants.url);

            // save your cookies (cooks is a global variable used for testing)
            cooks = gotCookies;
            saveCookieData(gotCookies);
          }
        },
      ),
    )
    ..loadRequest(Uri.parse(NHentaiConstants.url));

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: WebViewWidget(controller: controller),
    );
  }
}

import 'package:fk_user_agent/fk_user_agent.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:nclientv3/models/cook.dart';
import 'package:nclientv3/utils/utils.dart';
import 'package:nhentai/before_request_add_cookies.dart';
import 'package:nhentai/nhentai.dart' as nh;

class BrowseView extends StatefulWidget {
  const BrowseView({super.key});

  static route() => MaterialPageRoute(
        builder: (context) => const BrowseView(),
      );

  @override
  State<BrowseView> createState() => _BrowseViewState();
}

class _BrowseViewState extends State<BrowseView> {
  @override
  void initState() {
    super.initState();
  }

  void setNotRobot() {
    Navigator.pushNamed(context, "/not-a-robot");
  }

  void getData() async {
    final t = await loadCookieData();

    if (t == null || t.isEmpty) {
      return setNotRobot();
    }

    final api = nh.API(
      userAgent:
      // NOTE HERE: You need to pass in the user agent you got inside your webview
          "Mozilla/5.0 (Linux; Android 13; sdk_gphone_x86_64 Build/TE1A.220922.025; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/103.0.5060.71 Mobile Safari/537.36",
      beforeRequest: beforeRequestAddCookiesStatic(
        // the cookies (cooks - global variable that I stored the cookies in)
        cooks,
      ),
    );

    try {
      /// Throws if book is not found, or parse failed, see docs.
      final nh.Book book = await api.getBook(177013);

      // Short book summary
      debugPrint('Book: $book\n');
    } on nh.ApiClientException catch (e) {
      debugPrint('url ${e.request?.url}');
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: SingleChildScrollView(
          child: Padding(
            padding: const EdgeInsets.symmetric(horizontal: 20),
            child: Column(
              children: [
                MaterialButton(
                  onPressed: getData,
                  child: const Text('Get data'),
                ),
                MaterialButton(
                  onPressed: setNotRobot,
                  child: const Text('Fetch Tokens'),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}