05.创建订单并生成支付链接接口

目录

• 1.创建订单并生成支付链接接口
  • 1.1 goods/urls.py中注册路由
  • 1.2 goods/views.py 中写视图函数
  • 1.3 goods/utils.py中生成随机订单函数和生成支付URL函数
  • 1.4 syl/setings.py中配置支付相关参数

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

• 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=utf8&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"
	}
}