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%5Cu697 c%5Cu8ba2%5Cu5355%3ASYL2020101216322149584%2C+%5Cu4ef7%5Cu683c%3A99.00%22%2C%22ou
 t_trade_no%22%3A%22SYL2020101216322149584%22%2C%22total_amount%22%3A%2299.00%22%2 C%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%2BTwf89axXQPMzk67FO OHH18YtnoROi4ml5i5w%2Fd%
2FtD2RsYyxU5Jeatxw9Skz%2B9HQCAYfmQriYDo5fz2hOrC6Ydx92z5%2 BB5o%2BUIh29EAE8JS5MhUOOO8T3r9NtzmQTOs0kSWpnaXjX4S7l9Z83li76MG83H18jBodpWofgzcTTD
 dPsBnaHmeeJjGg9LKgSDS37ZKP9GE79asVn8S9w49qVmTPzZGdKIZxyLf2K44EllnGxhlDLFRlGLYJOlE %2Bxo1hr3IKH40WoYh3fkmv2%2FEDnl0OtNXHt5HRUH4uZ2k38BNf1ebrODR
qWRg1eQ%3D%3D"    
} 
}