5.创建订单并生成支付链接接口

1.创建订单并生成支付链接接口

1.1 goods/urls.py中注册路由

urlpatterns = [
    path('getpayurl/', views.PayUrlView.as_view()),  # /goods/getpayurl/
]

1.2 goods/views.py 中写视图函数

from rest_framework.views import APIView
from rest_framework.permissions import AllowAny, IsAuthenticated
from rest_framework.response import Response
from .models import Goods,Orders,GoodsCourse
from goods.utils import get_order_id, get_pay_url, alipay
​
​
from decimal import Decimal
class PayUrlView(APIView):
    permission_classes = (IsAuthenticated,)
​
    def post(self, request):
        # 1. 获取课程id,获取购买途径(普通购买, 促销购买) 获取用户
        goods_id = request.data.get('goods_id')
        goods = Goods.objects.get(id=goods_id)
        user = request.user
        # 2. 下定单
        order_id = get_order_id()
        if user.vip.vip_type == '1':  # 普通会员
            goods_price = goods.price * Decimal('0.80').quantize(Decimal('0.00'))
        elif user.vip.vip_type == '2':  # 高级会员
            goods_price = goods.price * Decimal('0.60').quantize(Decimal('0.00'))
        else:  # 普通用户
            goods_price = goods.price
        goods_price = Decimal(goods_price).quantize(Decimal('0.00'))
        order = Orders(user=user, goods=goods, order_id=order_id, pay_method=1, status=1,
                       total_amount=goods_price)
        order.save()
        print(order.total_amount,type(order.total_amount))
        # 3. 根据订单 生成支付链接
        subject = "实验楼订单:%s, 价格:%s" % (order.order_id, order.total_amount)
        pay_url = get_pay_url(order.order_id, order.total_amount, subject)
​
        # 4. 返回链接
        return Response({"code": 0, "msg": "下单成功", "data": {"pay_url": pay_url}})

1.3 goods/utils.py中生成随机订单函数和生成支付URL函数

# -*- coding: utf-8 -*-
import datetime
import os
import random
​
from alipay import AliPay
from syl import settings
​
# 获取文件路径
app_private_key_path = os.path.join(settings.BASE_DIR, "apps/goods/keys/app_private_key.pem")
alipay_public_key_path = os.path.join(settings.BASE_DIR, "apps/goods/keys/alipay_public_key.pem")
​
with open(app_private_key_path) as f:
    app_private_key_string = f.read()
​
with open(alipay_public_key_path) as f:
    alipay_public_key_string = f.read()
​
​
# 创建支付宝支付对象
alipay = AliPay(
    appid=settings.ALIPAY_APPID,
    app_notify_url=None,  # 默认回调url
    app_private_key_string=app_private_key_string,
    alipay_public_key_string=alipay_public_key_string,
    # app_private_key_path=app_private_key_path,
    # alipay_public_key_path=alipay_public_key_path,
    sign_type="RSA2",
    debug=settings.ALIPAY_DEBUG
)
​
​
def get_pay_url(out_trade_no, total_amount, subject):
    # 生成登录支付宝连接
    order_string = alipay.api_alipay_trade_page_pay(
        out_trade_no=out_trade_no,
        total_amount=str(total_amount),
        subject=subject,
        return_url=settings.ALIPAY_RETURN_URL,
    )
​
    # 响应登录支付宝连接
    # 真实环境电脑网站支付网关：https://openapi.alipay.com/gateway.do? + order_string
    # 沙箱环境电脑网站支付网关：https://openapi.alipaydev.com/gateway.do? + order_string
    alipay_url = settings.ALIPAY_URL + "?" + order_string
    return alipay_url
​
​
def get_order_id():
    """
    SYL202008241212121200005/24
    生成订单号: 格式: SYL + 年月日时分秒 + 5位随机数
    :return:
    """
    d = datetime.datetime.now()
    base = 'SYL'
    time_str = '%04d%02d%02d%02d%02d%02d' % (d.year, d.month, d.day, d.hour, d.minute, d.second)
    rand_num = str(random.randint(10000, 99999))
    return base + time_str + rand_num

1.4 syl/setings.py中配置支付相关参数

# 支付宝配置
ALIPAY_APPID = '2016101800716047'   # 沙箱环境中alipay应用ID
ALIPAY_DEBUG = True
ALIPAY_URL = 'https://openapi.alipaydev.com/gateway.do'             # alipay沙箱环境支付宝网管
ALIPAY_RETURN_URL = 'http://127.0.0.1:8888/payment/callback/'       # 支付完成后支付宝回调我们应用的地址

2.测试

• 请求地址

http://192.168.56.100:8888/goods/getpayurl/

• 携带参数

{
    "goods_id":1
}

• 返回数据

{
    "code":0,
    "msg":"下单成功",
    "data":{
        "pay_url":"https://openapi.alipaydev.com/gateway.do?app_id=2016101800716047&biz_content=%7B%22subject%22%3A%22%5Cu5b9e%5Cu9a8c%5Cu697c%5Cu8ba2%5Cu5355%3ASYL2020101216322149584%2C+%5Cu4ef7%5Cu683c%3A99.00%22%2C%22out_trade_no%22%3A%22SYL2020101216322149584%22%2C%22total_amount%22%3A%2299.00%22%2C%22product_code%22%3A%22FAST_INSTANT_TRADE_PAY%22%7D&charset=utf-8&method=alipay.trade.page.pay&return_url=http%3A%2F%2F127.0.0.1%3A8888%2Fpayment%2Fcallback%2F&sign_type=RSA2×tamp=2020-10-12+16%3A32%3A21&version=1.0&sign=qIM7yrjYgvqOn2DCYK4rBgtwqDnZ%2BTwf89axXQPMzk67FOOHH18YtnoROi4ml5i5w%2Fd%2FtD2RsYyxU5Jeatxw9Skz%2B9HQCAYfmQriYDo5fz2hOrC6Ydx92z5%2BB5o%2BUIh29EAE8JS5MhUOOO8T3r9NtzmQTOs0kSWpnaXjX4S7l9Z83li76MG83H18jBodpWofgzcTTDdPsBnaHmeeJjGg9LKgSDS37ZKP9GE79asVn8S9w49qVmTPzZGdKIZxyLf2K44EllnGxhlDLFRlGLYJOlE%2Bxo1hr3IKH40WoYh3fkmv2%2FEDnl0OtNXHt5HRUH4uZ2k38BNf1ebrODRqWRg1eQ%3D%3D"
    }
}

• 支付宝回调接口

http://127.0.0.1:8888/payment/callback/?
charset=utf-8&
out_trade_no=SYL2020101506280949732&
method=alipay.trade.page.pay.return&
total_amount=44.00&
sign=bzLju9A5Ax4jjWTKrmCs1Z4J%2BWhbayaYDAdWONWbKFeWmyRWk%2Fxd3QwsfaHqnwPEo8mtCR4n3OCGHI410aD10LdwAZ%2FRmWfh3t4ATL7UOiTqrMH0x0gOpAGll2HSN4Nq2sVdiPbiK1RAaY%2B83F5%2FgTUNa7i20cJ8kXcXhQRDE5t5f4WNBtscgF661mvjQjgCw4pqK3MiivAnOGCeJ4PKO0qHDOPfXLrZEfvtHqLexTEsgSko%2Bb9W%2BQukvcmaxp%2BOnB%2F6XbDL7aH0swVtUQvvF%2F6jOMXr23AHg6QnzAYbZhJhvaLBP6BFjVwK%2B1xgNYOEvQa0Ukxwp%2FWLXwSPsamK%2Bg%3D%3D&
trade_no=2020101522001428980501059961&
auth_app_id=2016101800716047&
version=1.0&
app_id=2016101800716047&
sign_type=RSA2&
seller_id=2088102180143385&
timestamp=2020-10-15%2014%3A28%3A49