09 调用支付宝接口

class PayView(LoginRequiredJsonMixin, View):
    """支付宝支付视图"""
    def post(self, request):
        # 订单编号  order_id
        order_id = request.POST.get("order_id")

        if not order_id:
            return JsonResponse({"code": 2, "message": "缺失订单编号"})

        # 获取订单信息
        try:
            order = OrderInfo.objects.get(order_id=order_id, user=request.user,
                                          status=OrderInfo.ORDER_STATUS_ENUM["UNPAID"],
                                          pay_method=OrderInfo.PAY_METHODS_ENUM["ALIPAY"])
        except OrderInfo.DoesNotExist:
            return JsonResponse({"code": 3, "message": "订单信息错误"})

        # 构建alipay支付工具对象
        alipay = AliPay(
            appid=settings.ALIPAY_APPID,  # 沙箱模式中的appid
            app_notify_url=None,  # 默认回调url
            app_private_key_path=os.path.join(settings.BASE_DIR, "apps/orders/app_private_key.pem"),
            alipay_public_key_path=os.path.join(settings.BASE_DIR, "apps/orders/alipay_public_key.pem"),  # 支付宝的公钥，验证支付宝回传消息使用，不是你自己的公钥,
            sign_type="RSA2",  # RSA 或者 RSA2
            debug=True  # 默认False, 沙箱模式配置为true
        )

        # 借助alipay对象，向支付宝发起支付请求
        # 电脑网站支付，需要跳转到https://openapi.alipaydev.com/gateway.do? + order_string
        order_string = alipay.api_alipay_trade_page_pay(
            out_trade_no=order_id,  # 订单编号
            total_amount=str(order.total_amount),   # 订单金额
            subject="天天生鲜%s" % order_id,   # 订单描述信息
            return_url=None,
            notify_url=None  # 可选, 不填则使用默认notify url
        )

        # 返回json数据
        alipay_url = settings.ALIPAY_URL + "?" + order_string
        return JsonResponse({"code": 0, "message": "发起支付成功", "url": alipay_url})

class CheckPayStatusView(LoginRequiredJsonMixin, View):
    """检查支付结果"""
    def get(self, request):
        order_id = request.GET.get("order_id")

        if not order_id:
            return JsonResponse({"code": 2, "message": "缺少订单号"})

        # 获取订单信息
        try:
            order = OrderInfo.objects.get(order_id=order_id, user=request.user,
                                          status=OrderInfo.ORDER_STATUS_ENUM["UNPAID"],
                                          pay_method=OrderInfo.PAY_METHODS_ENUM["ALIPAY"])
        except OrderInfo.DoesNotExist:
            return JsonResponse({"code": 3, "message": "订单信息错误"})

        # 构建alipay支付工具对象
        alipay = AliPay(
            appid=settings.ALIPAY_APPID,  # 沙箱模式中的appid
            app_notify_url=None,  # 默认回调url
            app_private_key_path=os.path.join(settings.BASE_DIR, "apps/orders/app_private_key.pem"),
            alipay_public_key_path=os.path.join(settings.BASE_DIR, "apps/orders/alipay_public_key.pem"),  # 支付宝的公钥，验证支付宝回传消息使用，不是你自己的公钥,
            sign_type="RSA2",  # RSA 或者 RSA2
            debug=True  # 默认False, 沙箱模式配置为true
        )

        # 借助alipay工具查询支付结果
        while True:
            response = alipay.api_alipay_trade_query(order_id)
            code = response.get("code")
            trade_status = response.get("trade_status")
            if code == "10000" and trade_status == "TRADE_SUCCESS":
                # 表示用户支付成功
                order.trade_id = response.get("trade_no") # 支付宝的交易标号
                order.status = OrderInfo.ORDER_STATUS_ENUM["UNCOMMENT"]  # 设置订单状态为待评价
                order.save()
                return JsonResponse({"code": 0, "message": "支付成功"})
            elif code == "40004" or (code == "10000" and trade_status == "WAIT_BUYER_PAY"):
                # 表示支付宝订单还没创建好， 或者用户还未支付
                time.sleep(10)
                continue
            else:
                return JsonResponse({"code": 4, "message": "支付失败"})