创建订单并生成支付宝支付链接接口

1.1 goods/urls.py中注册路由

rom django.urls import path
from . import views
urlpatterns = [
    path('getpayurl/', views.PayUrlView.as_view()),

]

1.2 goods/views.py 中写视图函数

from decimal import Decimal
from rest_framework.permissions import AllowAny, IsAuthenticated
from django.shortcuts import render
from rest_framework.views import APIView
from rest_framework.response import Response
from apps.goods.models import *
from goods.utils import get_order_id,get_pay_url,alipay
from apps.course.models import *
# Create your views here.






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.下订单
        order_id =get_order_id()
        if user.vip.vip_type=='1':
            goods_price=goods.price * Decimal('0.80').quantize(Decimal('0.00'))
        elif user.vip.vip_type=='2':
            goods_price=goods.price * Decimal('0.60').quantize(Decimal('0.00'))

        else:
            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)
        print(pay_url)
        return Response({"code":1000,"msg":"下单成功","data":pay_url})

#订单回调
class PayMentView(APIView):
    permission_classes = (AllowAny,)

    def post(self,request):
        # 1. 获取了支付宝返回的数据
        data=request.data
        print(data)
        sign=data.pop('sign')
        order=Orders.objects.get(order_id=data['out_trade_no'])
        order.trade_no=data['trade_no']
        order.pay_time=data['timestamp']
        order.status=2
        order.save()
        user=order.user
        course=order.goods.course
        UserCourse.objects.create(user=user,course=course)
        return Response({'code':0,'msg':'购买成功'})

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.txt")
alipay_public_key_path = os.path.join(settings.BASE_DIR,
                                      "apps/goods/keys/alipay_public_key.txt")
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
        print(alipay_url)
        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 = '2016102900775365' #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%2FEDnl0OtNXHt5HRUH4uZ2k38BNf1ebrODRqWRg1eQ%3D%3D” }
}