无效字符(位于字符68处)flutter—update—... europewest1.firebasedatabase.app

看来我对Firebase数据库的真实数据库有问题.

该数据库的地址为flutter-update-.........europe-west1.firebasedatabase.app/

当我点击保存按钮时，错误:

无效字符(位于字符68)flutter-update-.........europe-west1.firebasedatabase.app/

我甚至删除了https://从开始的数据库地址，但不工作！

import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'dart:convert';
import 'package:my_shop/providers/product.dart';

class Products with ChangeNotifier {
  final List<Product> _items = [
    Product(
      id: 'p1',
      title: 'Red Shirt',
      description: 'A red shirt - it is pretty red!',
      price: 29.99,
      imageUrl:
          'https://cdn.pixabay.com/photo/2016/10/02/22/17/red-t-shirt-1710578_1280.jpg',
    ),
    Product(
      id: 'p2',
      title: 'Trousers',
      description: 'A nice pair of trousers.',
      price: 59.99,
      imageUrl:
          'https://upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Trousers%2C_dress_%28AM_1960.022-8%29.jpg/512px-Trousers%2C_dress_%28AM_1960.022-8%29.jpg',
    ),
    Product(
      id: 'p3',
      title: 'Yellow Scarf',
      description: 'Warm and cozy - exactly what you need for the winter.',
      price: 19.99,
      imageUrl:
          'https://live.staticflickr.com/4043/4438260868_cc79b3369d_z.jpg',
    ),
    Product(
      id: 'p4',
      title: 'A Pan',
      description: 'Prepare any meal you want.',
      price: 49.99,
      imageUrl:
          'https://upload.wikimedia.org/wikipedia/commons/thumb/1/14/Cast-Iron-Pan.jpg/1024px-Cast-Iron-Pan.jpg',
    ),
  ];

  //var _showFavoritesOnly = false;
  List<Product> get items {
    // if (_showFavoritesOnly) {
    //   return _items.where((prodItem) => prodItem.isFavorite).toList();
    // }
    return [..._items];
  }

  List<Product> get favoriteItems {
    return _items.where((prodItem) => prodItem.isFavorite).toList();
  }

  // void showFavoritesOnly() {
  //   _showFavoritesOnly = true;
  //   notifyListeners();
  // }

  // void showAll(){
  //   _showFavoritesOnly = false;
  //   notifyListeners();
  // }

  Product findById(String id) {
    return _items.firstWhere((prod) => prod.id == id);
  }

  void addProduct(Product product) {
    var url = Uri.https(
        'flutter-update-ced0c-default-rtdb.europe-west1.firebasedatabase.app/',
        '/products.json');
    http
        .post(
      url,
      body: json.encode({
        'title': product.title,
        'description': product.description,
        'price': product.price,
        'imageUrl': product.imageUrl,
        'isFavorite': product.isFavorite
      }),
    )
        .then((response) {
      final newProduct = Product(
          id: json.decode(response.body)['name'],
          title: product.title,
          description: product.description,
          price: product.price,
          imageUrl: product.imageUrl);
      _items.add(newProduct);
      //_items.insert(0,newProduct);
      notifyListeners();
    });
  }

  void updateProduct(String id, Product newProduct) {
    final prodcutIndex = _items.indexWhere((prod) => prod.id == id);
    if (prodcutIndex >= 0) {
      _items[prodcutIndex] = newProduct;
      notifyListeners();
    } else {
      print('...');
    }
  }

  void deleteProduct(String id) {
    _items.removeWhere((prod) => prod.id == id);
    notifyListeners();
  }
}