1.syl/settings.py 中配置支付相關引數

# 支付寶配置
ALIPAY_APPID = '2016102600762786'  # 沙箱環境中alipay應用ID

ALIPAY_DEBUG = True

# alipay沙箱環境支付寶閘道器
ALIPAY_URL = 'https://openapi.alipaydev.com/gateway.do'

# 支付完成後支付寶回撥我們應用的地址
ALIPAY_RETURN_URL = 'http://127.0.0.1:8888/payment/callback/'

2. goods/utils.py 中生成隨機訂單函式和生成支付URL函式

# -*- coding: utf-8 -*-
import datetime
import os
import random

from alipay import AliPay
from syl import settings


# 獲取檔案路徑
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()

# 建立支付寶支付物件
alipay = AliPay(
    appid=settings.ALIPAY_APPID,
    app_notify_url=None, # 預設回撥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):
    # 生成登入支付寶連線
    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,
    )
    # 響應登入支付寶連線
    # 真實環境電腦網站支付閘道器：https://openapi.alipay.com/gateway.do? + order_string
    # 沙箱環境電腦網站支付閘道器：https://openapi.alipaydev.com/gateway.do? +order_string
    alipay_url = settings.ALIPAY_URL + "?" + order_string
    return alipay_url


def get_order_id():
    """
    SYL202008241212121200005/24
    生成訂單號: 格式: SYL + 年月日時分秒 + 5位隨機數
    :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
 

3. goods/views.py 中寫檢視函式

from rest_framework.views import APIView
from rest_framework.permissions import AllowAny, IsAuthenticated
from rest_framework.response import Response
from .models import Goods, Orders
from .utils import get_order_id, get_pay_url, alipay


class PayUrlView(APIView):
    permission_classes = (IsAuthenticated,)

    def post(self, request):
        # 1. 獲取課程id,獲取購買途徑(普通購買, 促銷購買) 獲取使用者
        goods_id = request.data.get('goods_id')
        goods = Goods.objects.get(id=goods_id)
        user = request.user
        # 2. 下定單
        order_id = get_order_id()
        if user.vip.vip_type == '1':    # 普通會員
            goods_price = goods.price * Decimal('0.80').quantize(Decimal('0.00'))
        elif user.vip.vip_type == '2':  # 高階會員
            goods_price = goods.price * Decimal('0.60').quantize(Decimal('0.00'))
        else:   # 普通使用者
            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. 根據訂單 生成支付連結
        subject = "實驗樓訂單:%s, 價格:%s" % (order.order_id, order.total_amount)
        pay_url = get_pay_url(order.order_id, order.total_amount, subject)

        # 4. 返回連結
        return Response({"code": 0, "msg": "下單成功", "data": {"pay_url": pay_url}})

 

4.goods/urls 中註冊路由

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

5. 測試

• 請求地址

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

• 攜帶引數

{
	"goods_id":1
}

• 返回資料

{
"code":0,
"msg":"下單成功",
"data":{
    "pay_url":"https://openapi.alipaydev.com/gateway.doapp_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=20201012+16%3A323A21&version=1.0&sign=qIM7yrjYgvqOn2DCYK4rBgtwqDnZ%2BTwf89axXQPMzk67FOOHH18YtnoROi4ml5i5w%2Fd%2FtD2RsYyxU5Jeatxw9Skz%2B9HQCAYfmQriYDo5fz2hOrC6Ydx92z5%2BB5o%2BUIh29EAE8JS5MhUOOO8T3r9NtzmQTOs0kSWpnaXjX4S7l9Z83li76MG83H18jBodpWofgzcTTDdPsBnaHmeeJjGg9LKgSDS37ZKP9GE79asVn8S9w49qVmTPzZGdKIZxyLf2K44EllnGxhlDLFRlGLYJOlE%2Bxo1hr3IKH40WoYh3fkmv2%2FEDnl0OtNXHt5HRUH4uZ2k38BNf1ebrODRqWRg1eQ%3D%3D"
    }
}