支付宝支付流程以及二次封装alipay包 支付模块后台接口的实现 订单接口实现

# 1、在沙箱环境下实名认证：https://openhome.alipay.com/platform/appDaily.htm?tab=info

# 2、电脑网站支付API：https://docs.open.alipay.com/270/105898/

# 3、完成RSA密钥生成：https://docs.open.alipay.com/291/105971

# 4、在开发中心的沙箱应用下设置应用公钥：填入生成的公钥文件中的内容

# 5、Python支付宝开源框架：https://github.com/fzlee/alipay

# 6、安装支付宝:>: pip install python-alipay-sdk --upgrade

# 7、公钥私钥设置
"""
# alipay_public_key.pem
-----BEGIN PUBLIC KEY-----
支付宝公钥
-----END PUBLIC KEY-----

# app_private_key.pem
-----BEGIN RSA PRIVATE KEY-----
用户私钥
-----END RSA PRIVATE KEY-----
"""

# 8、支付宝链接
"""
开发：https://openapi.alipay.com/gateway.do
沙箱：https://openapi.alipaydev.com/gateway.do
"""

"""
支付流程文字描述:
1.提交订单,前台提供相关信息(商品名称,数目,价格等)
2.后台产生订单并入库,支付状态未支付,产生支付链接返回给前台包括两个回调接口
3.前台请求支付链接,响应支付页面,支付宝登录并跳转到支付页面,付款完成支付
4.一旦支付完成,支付宝进行回调,同步回调给前台回调信息,之后请求后台,同时进行异步回调.
"""

>: pip install python-alipay-sdk --upgrade

libs
    ├── iPay                              # aliapy二次封装包
    │   ├── __init__.py                 # 包文件
    │   ├── keys                        # 密钥文件夹
    │   │   ├── alipay_public_key.pem      # 支付宝公钥
    │   │   └── app_private_key.pem      # 应用私钥
    └── └── settings.py                  # 应用配置  

1.密钥生成地址:https://opendocs.alipay.com/open/291/105971
得到了应用私钥和应用公钥,之后将应用私钥放入文件中,将应用公钥放在沙箱环境下换取支付宝公钥,放入文件中

import os
# 支付宝应用id
APP_ID = ‘2016093000631831‘
# 默认异步回调的地址，通常设置None就行
APP_NOTIFY_URL = None
# 应用私钥文件路径
APP_PRIVATE_KEY_PATH = os.path.join(os.path.dirname(__file__), ‘keys‘, ‘app_private_key.pem‘)
# 支付宝公钥文件路径
ALIPAY_PUBLIC_KEY_PATH = os.path.join(os.path.dirname(__file__), ‘keys‘, ‘alipay_public_key.pem‘)
# 签名方式
SIGN_TYPE = ‘RSA2‘
# 是否是测试环境 - 是否是支付宝沙箱
DEBUG = True
# 支付连接
DEV_PAY_URL = ‘https://openapi.alipaydev.com/gateway.do?‘
PROD_PAY_URL = ‘https://openapi.alipay.com/gateway.do?‘

from alipay import AliPay
from .settings import *
# 对外提供支付对象
alipay = AliPay(
    appid=APP_ID,
    app_notify_url=APP_NOTIFY_URL,
    app_private_key_path=APP_PRIVATE_KEY_PATH,
    alipay_public_key_path=ALIPAY_PUBLIC_KEY_PATH,
    sign_type=SIGN_TYPE,
    debug=DEBUG
)

# 对外提供的支付链接前缀
pay_url = DEV_PAY_URL if DEBUG else PROD_PAY_URL

-----BEGIN PUBLIC KEY-----
支付宝公钥
-----END PUBLIC KEY-----

-----BEGIN RSA PRIVATE KEY-----
应用私钥
-----END RSA PRIVATE KEY-----

# 前后台base_url
UP_BASE_URL = ‘http://127.0.0.1:8080‘
END_BASE_URL = ‘http://127.0.0.1:8000‘

# alipay回调接口配置
# 上线后必须换成官网地址
# 同步回调的接口(get)，前后台分离时一般设置前台页面url
RETURN_URL = UP_BASE_URL + ‘/pay/success‘
# 异步回调的接口(post)，一定设置为后台服务器接口
NOTIFY_URL = END_BASE_URL + ‘/order/success/‘

from django.db import models

# 订单表：
from django.db import models
from utils.model import BaseModel
from user.models import User
from course.models import Course


class Order(models.Model):
    """订单模型"""
    status_choices = (
        (0, ‘未支付‘),
        (1, ‘已支付‘),
        (2, ‘已取消‘),
        (3, ‘超时取消‘),
    )
    pay_choices = (
        (1, ‘支付宝‘),
        (2, ‘微信支付‘),
    )
    subject = models.CharField(max_length=150, verbose_name="订单标题")
    total_amount = models.DecimalField(max_digits=10, decimal_places=2, verbose_name="订单总价", default=0)
    out_trade_no = models.CharField(max_length=64, verbose_name="订单号", unique=True)
    trade_no = models.CharField(max_length=64, null=True, verbose_name="流水号")
    order_status = models.SmallIntegerField(choices=status_choices, default=0, verbose_name="订单状态")
    pay_type = models.SmallIntegerField(choices=pay_choices, default=1, verbose_name="支付方式")
    pay_time = models.DateTimeField(null=True, verbose_name="支付时间")
    user = models.ForeignKey(User, related_name=‘user_orders‘, on_delete=models.DO_NOTHING, db_constraint=False,
                             verbose_name="下单用户")
    class Meta:
        db_table = "luffy_order"
        verbose_name = "订单记录"
        verbose_name_plural = "订单记录"

    def __str__(self):
        return "%s - ￥%s" % (self.subject, self.total_amount)

    @property
    def courses(self):
        data_list = []
        for item in self.order_courses.all():
            data_list.append({
                "id": item.id,
                "course_name": item.course.name,
                "real_price": item.real_price,
            })

        return data_list


class OrderDetail(BaseModel):
    """订单详情"""
    order = models.ForeignKey(Order, related_name=‘order_courses‘, on_delete=models.CASCADE, db_constraint=False,
                              verbose_name="订单")
    course = models.ForeignKey(Course, related_name=‘course_orders‘, on_delete=models.CASCADE, db_constraint=False,
                               verbose_name="课程")
    price = models.DecimalField(max_digits=6, decimal_places=2, verbose_name="课程原价")
    real_price = models.DecimalField(max_digits=6, decimal_places=2, verbose_name="课程实价")

    class Meta:
        db_table = "luffy_order_detail"
        verbose_name = "订单详情"
        verbose_name_plural = verbose_name

    def __str__(self):
        return "%s订单(%s)" % (self.course.name, self.order.out_trade_no)

from django.urls import path
from . import views
urlpatterns = [
    path(‘pay/‘, views.PayAPIView.as_view()),
    path(‘success/‘, views.SuccessAPIView.as_view()),
]

from rest_framework import serializers
from . import models
class OrderModelSerializer(serializers.ModelSerializer):
    class Meta:
        model = models.Order
        fields = (‘subject‘, ‘total_amount‘, ‘out_trade_no‘, ‘pay_type‘, ‘user‘)
        extra_kwargs = {
            ‘pay_type‘: {
                ‘required‘: True
            },
            ‘total_amount‘: {
                ‘required‘: True
            },
        }

import time
from rest_framework.views import APIView
from utils.response import APIResponse
from libs.iPay import alipay
from . import authentications, serializers
from rest_framework.permissions import IsAuthenticated
from django.conf import settings
# 获取前台 商品名、价格，产生 订单、支付链接
class PayAPIView(APIView):
    authentication_classes = [authentications.JWTAuthentication]
    permission_classes = [IsAuthenticated]
    def post(self, request, *args, **kwargs):
        # 前台提供：商品名、总价、支付方式
        request_data = request.data
        # 后台产生：订单号、用户
        out_trade_no = ‘%d‘ % time.time() * 2
        request_data[‘out_trade_no‘] = out_trade_no
        request_data[‘user‘] = request.user.id

        # 反序列化数据，用于订单生成前的校验
        order_ser = serializers.OrderModelSerializer(data=request_data)
        if order_ser.is_valid():
            # 生成订单，订单默认状态为：未支付
            order = order_ser.save()
            # 支付链接的参数
            order_string = alipay.api_alipay_trade_page_pay(
                subject=order.subject,
                out_trade_no=order.out_trade_no,
                total_amount=‘%.2f‘ % order.total_amount,
                return_url=settings.RETURN_URL,
                notify_url=settings.NOTIFY_URL
            )
            # 形成支付链接：alipay._gateway根据字符环境DEBUG配置信息，决定是沙箱还是真实支付环境
            pay_url = ‘%s?%s‘ % (alipay._gateway, order_string)
            return APIResponse(0, ‘ok‘, pay_url=pay_url)
        return APIResponse(1, ‘no ok‘, results=order_ser.errors)

{
      path: ‘/pay/success‘,
    name: ‘pay-success‘,
    component: PaySuccess
},

from . import models
from utils.logging import logger
from rest_framework.response import Response
class SuccessAPIView(APIView):
    # 不能认证，别人支付宝异步回调就进不来了
    # authentication_classes = [authentications.JWTAuthentication]
    # permission_classes = [IsAuthenticated]
    def patch(self, request, *args, **kwargs):
        # 默认是QueryDict类型，不能使用pop方法
        request_data = request.query_params.dict()
        # 必须将 sign、sign_type(内部有安全处理) 从数据中取出，拿sign与剩下的数据进行校验
        sign = request_data.pop(‘sign‘)
        result = alipay.verify(request_data, sign)
        if result:  # 同步回调：修改订单状态
            try:
                out_trade_no = request_data.get(‘out_trade_no‘)
                order = models.Order.objects.get(out_trade_no=out_trade_no)
                if order.order_status != 1:
                    order.order_status = 1
                    order.save()
            except:
                pass
            return APIResponse(0, ‘支付成功‘)
        return APIResponse(1, ‘支付失败‘)

    # 支付宝异步回调
    def post(self, request, *args, **kwargs):
        # 默认是QueryDict类型，不能使用pop方法
        request_data = request.data.dict()
        # 必须将 sign、sign_type(内部有安全处理) 从数据中取出，拿sign与剩下的数据进行校验
        sign = request_data.pop(‘sign‘)
        result = alipay.verify(request_data, sign)
        # 异步回调：修改订单状态
        if result and request_data["trade_status"] in ("TRADE_SUCCESS", "TRADE_FINISHED" ):
            out_trade_no = request_data.get(‘out_trade_no‘)
            logger.critical(‘%s支付成功‘ % out_trade_no)
            try:
                order = models.Order.objects.get(out_trade_no=out_trade_no)
                if order.order_status != 1:
                    order.order_status = 1
                    order.save()
            except:
                pass
            # 支付宝八次异步通知，订单成功一定要返回 success
            return Response(‘success‘)
        return Response(‘failed‘)