checkout url: http://localhost:4200/
electronics-spa/en/USD/checkout/shipping-address
首先读取checkout页面的CMS信息：
读取carts 8679的信息：
https://spartacus-dev0.eastus.cloudapp.azure.com:9002/occ/v2/electronics-spa/users/current/carts/00008679?fields=DEFAULT,potentialProductPromotions,appliedProductPromotions,potentialOrderPromotions,appliedOrderPromotions,entries(totalPrice(formattedValue),product(images(FULL),stock(FULL)),basePrice(formattedValue,value),updateable),totalPrice(formattedValue),totalItems,totalPriceWithTax(formattedValue),totalDiscounts(value,formattedValue),subTotal(formattedValue),deliveryItemsQuantity,deliveryCost(formattedValue),totalTax(formattedValue,%20value),pickupItemsQuantity,net,appliedVouchers,productDiscounts(formattedValue),user&lang=en&curr=USD