如何使用翻新设置/获取快速会话数据

Question

我正在尝试使用翻新从Android应用程序将商品添加到我的购物车中的商品，该商品存储在Express会话中。但是购物车数量保持不变。如何设置标题以访问快速会话？

我正在使用Nodejs开发后端的电子商务应用程序，并将购物车存储在快速会话中。至于客户端（Android应用程序），我正在使用改型来获取API数据。使用邮递员测试路线时，项目已成功添加。但是，当我尝试使用改造并通过它设置项目时，数量始终为1。我相信原因是未设置会话。

我认为没有必要在客户端上创建新的数据存储：因为会话数据存储在服务器端。但是express-session id存储在cookie中，如果我正确的话，cookies存储在客户端。如果这是错误的方法，您会提出什么建议？如果不是，我的错误是什么？

购物车模型-cart.js

module.exports = function Cart(oldCrart) {
  this.items = oldCrart.items || {}; //if oldcart is not diggined use empity as default
  this.totalQty = oldCrart.totalQty || 0;
  this.totalPrice = oldCrart.totalPrice || 0;

  this.add = function(item, id) {
    var storedItem = this.items[id];
    if (!storedItem) {
      storedItem = this.items[id] = { item: item, qty: 0, price: 0 };
    }
    storedItem.qty++;
    storedItem.price = storedItem.item.price * storedItem.qty;
    this.totalQty++;
    this.totalPrice += storedItem.item.price * 1; //*1 is there to treat the variable as intiger
  };
  this.generateArray = function() {
    var arr = [];
    for (var id in this.items) {
      arr.push(this.items[id]);
    }
    return arr;
  };
};

ProductDetails.java

  compositeDisposable.add(ClientApi.addToCart(Productid, "session Id")
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(
                        new Consumer<Cart>() {
                            @Override
                            public void accept(Cart cart) throws Exception {
                                Toast.makeText(SingleProduct.this, "Product added to cart"), Toast.LENGTH_SHORT).show();

                            }

                        }, new Consumer<Throwable>() {
                            @Override
                            public void accept(Throwable throwable) throws Exception {
                                Toast.makeText(SingleProduct.this,throwable.getMessage() , Toast.LENGTH_SHORT).show();

                            }
                        }));
    }

Client api

    @GET("/mobile-api/add-to-cart/{id}")
    Observable<Cart> addToCart(@Path("id")String pid, @Header("cookie.connect.sid") String sid);

addToCart路线

//serverside 
router.get("/mobile-api/add-to-cart/:id", function(req, res) {
  var productId = req.params.id;
  var cart = new Cart(req.session.cart ? req.session.cart : {}); //pass the cart if it exist or empity if it doesnt
  console.log("cart", cart);
  Product.findById(productId, function(err, product) {
    if (err) {
      console.log(err);
    }
    cart.add(product, product.id);
    const totalQty = (req.session.cart = cart);

    var Mycart = new Cart(req.session.cart);
    const cartData = {
      products: Mycart.generateArray(),
      totalPrice: Mycart.totalPrice
    };
     console.log(cart);//LOG THE CART
    res.json(cartData);
  });
});

我使用邮差和android应用程序添加了四次相同的产品邮递员返回

cart Cart {
  items: 
   { '5c871fa5a9f2e1fc0ec63eaa': { item: [Object], qty: 4, price: 18220 } },
  totalQty: 4,
  totalPrice: 18220

到控制台，但返回了android应用

cart Cart {
  items: 
   { '5c871fa5a9f2e1fc0ec63eaa': 
      { item: { manufacture: [ { _id: 5c871fa5a9f2e1fc0ec63eab, manufacturer: 'toothless' } ],

  stokeamount: 3,
  image: 'some-image.jpg',
  price: '4555',
  pname: 'Wood crafted phone case',
  _id: 5c871fa5a9f2e1fc0ec63eaa },
        qty: 1,
        price: 4555 } },
  totalQty: 1,//TOTAL QUANTITY IS ALWAYS THE SAME
  totalPrice: 4555

totalQty和qty始终为1

Answer 1

我启用了RetrofitClient类以接受cookie，它的工作原理就像一种魅力

     public class RetrofitClient {
    private static Retrofit instance;

    public static Retrofit getInstance(){
        //create OKHTTPCLIENT
        HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
        interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);

        CookieHandler cookieHandler = new CookieManager();
        OkHttpClient client = new OkHttpClient.Builder().addNetworkInterceptor(interceptor)
                .cookieJar(new JavaNetCookieJar(cookieHandler))
                .connectTimeout(10, TimeUnit.SECONDS)
                .writeTimeout(10, TimeUnit.SECONDS)
                .readTimeout(30, TimeUnit.SECONDS)
                .build();

        if(instance == null)
            instance= new Retrofit.Builder()
                    .baseUrl("http://192.168.44.125:5000")
                    .addConverterFactory(GsonConverterFactory.create())
                    .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                    .client(client)
                    .build();
        return instance;
    }
}