【Vue+Django REST framework实战】第9章—— 购物车、订单管理和支付功能
购物车功能需求分析和加入到购物车实现
#购物车url
router.register(r'shopcarts', ShoppingCartViewset, base_name="shopcarts")
class ShoppingCartViewset(viewsets.ModelViewSet):
"""
购物车功能
list:
获取购物车详情
create：
加入购物车
delete：
删除购物记录
"""
permission_classes = (IsAuthenticated, IsOwnerOrReadOnly)
authentication_classes = (JSONWebTokenAuthentication, SessionAuthentication)
serializer_class = ShopCartSerializer
lookup_field = "goods_id"
def perform_create(self, serializer):
shop_cart = serializer.save()
goods = shop_cart.goods
goods.goods_num -= shop_cart.nums
goods.save()
def perform_destroy(self, instance):
goods = instance.goods
goods.goods_num += instance.nums
goods.save()
instance.delete()
def perform_update(self, serializer):
existed_record = ShoppingCart.objects.get(id=serializer.instance.id)
existed_nums = existed_record.nums
saved_record = serializer.save()
nums = saved_record.nums-existed_nums
goods = saved_record.goods
goods.goods_num -= nums
goods.save()
def get_serializer_class(self):
if self.action == 'list':
return ShopCartDetailSerializer
else:
return ShopCartSerializer
def get_queryset(self):
return ShoppingCart.objects.filter(user=self.request.user)
class ShopCartDetailSerializer(serializers.ModelSerializer):
goods = GoodsSerializer(many=False, read_only=True)
class Meta:
model = ShoppingCart
fields = ("goods", "nums")
class ShopCartSerializer(serializers.Serializer):
user = serializers.HiddenField(
default=serializers.CurrentUserDefault()
)
nums = serializers.IntegerField(required=True, label="数量",min_value=1,
error_messages={
"min_value":"商品数量不能小于一",
"required": "请选择购买数量"
})
goods = serializers.PrimaryKeyRelatedField(required=True, queryset=Goods.objects.all())
def create(self, validated_data):
user = self.context["request"].user
nums = validated_data["nums"]
goods = validated_data["goods"]
existed = ShoppingCart.objects.filter(user=user, goods=goods)
if existed:
existed = existed[0]
existed.nums += nums
existed.save()
else:
existed = ShoppingCart.objects.create(**validated_data)
return existed
def update(self, instance, validated_data):
#修改商品数量
instance.nums = validated_data["nums"]
instance.save()
return instance
订单管理接口
#订单相关url
router.register(r'orders', OrderViewset, base_name="orders")
class OrderViewset(mixins.ListModelMixin, mixins.RetrieveModelMixin, mixins.CreateModelMixin, mixins.DestroyModelMixin, viewsets.GenericViewSet):
"""
订单管理
list:
获取个人订单
delete:
删除订单
create：
新增订单
"""
permission_classes = (IsAuthenticated, IsOwnerOrReadOnly)
authentication_classes = (JSONWebTokenAuthentication, SessionAuthentication)
serializer_class = OrderSerializer
def get_queryset(self):
return OrderInfo.objects.filter(user=self.request.user)
def get_serializer_class(self):
if self.action == "retrieve":
return OrderDetailSerializer
return OrderSerializer
def perform_create(self, serializer):
order = serializer.save()
shop_carts = ShoppingCart.objects.filter(user=self.request.user)
for shop_cart in shop_carts:
order_goods = OrderGoods()
order_goods.goods = shop_cart.goods
order_goods.goods_num = shop_cart.nums
order_goods.order = order
order_goods.save()
shop_cart.delete()
return order
class OrderDetailSerializer(serializers.ModelSerializer):
goods = OrderGoodsSerialzier(many=True)
alipay_url = serializers.SerializerMethodField(read_only=True)
def get_alipay_url(self, obj):
alipay = AliPay(
appid="",
app_notify_url="http://127.0.0.1:8000/alipay/return/",
app_private_key_path=private_key_path,
alipay_public_key_path=ali_pub_key_path, # 支付宝的公钥，验证支付宝回传消息使用，不是你自己的公钥,
debug=True, # 默认False,
return_url="http://127.0.0.1:8000/alipay/return/"
)
url = alipay.direct_pay(
subject=obj.order_sn,
out_trade_no=obj.order_sn,
total_amount=obj.order_mount,
)
re_url = "https://openapi.alipaydev.com/gateway.do?{data}".format(data=url)
return re_url
class Meta:
model = OrderInfo
fields = "__all__"
class OrderSerializer(serializers.ModelSerializer):
user = serializers.HiddenField(
default=serializers.CurrentUserDefault()
)
pay_status = serializers.CharField(read_only=True)
trade_no = serializers.CharField(read_only=True)
order_sn = serializers.CharField(read_only=True)
pay_time = serializers.DateTimeField(read_only=True)
alipay_url = serializers.SerializerMethodField(read_only=True)
def get_alipay_url(self, obj):
alipay = AliPay(
appid="",
app_notify_url="http://127.0.0.1:8000/alipay/return/",
app_private_key_path=private_key_path,
alipay_public_key_path=ali_pub_key_path, # 支付宝的公钥，验证支付宝回传消息使用，不是你自己的公钥,
debug=True, # 默认False,
return_url="http://127.0.0.1:8000/alipay/return/"
)
url = alipay.direct_pay(
subject=obj.order_sn,
out_trade_no=obj.order_sn,
total_amount=obj.order_mount,
)
re_url = "https://openapi.alipaydev.com/gateway.do?{data}".format(data=url)
return re_url
def generate_order_sn(self):
# 当前时间+userid+随机数
from random import Random
random_ins = Random()
order_sn = "{time_str}{userid}{ranstr}".format(time_str=time.strftime("%Y%m%d%H%M%S"),
userid=self.context["request"].user.id, ranstr=random_ins.randint(10, 99))
return order_sn
def validate(self, attrs):
attrs["order_sn"] = self.generate_order_sn()
return attrs
class Meta:
model = OrderInfo
fields = "__all__"
pycharm远程代码调试
支付宝通知接口验证
# -*- coding: utf-8 -*-
# pip install pycryptodome
__author__ = 'bobby'
from datetime import datetime
from Crypto.PublicKey import RSA
from Crypto.Signature import PKCS1_v1_5
from Crypto.Hash import SHA256
from base64 import b64encode, b64decode
from urllib.parse import quote_plus
from urllib.parse import urlparse, parse_qs
from urllib.request import urlopen
from base64 import decodebytes, encodebytes
import json
class AliPay(object):
"""
支付宝支付接口
"""
def __init__(self, appid, app_notify_url, app_private_key_path,
alipay_public_key_path, return_url, debug=False):
self.appid = appid
self.app_notify_url = app_notify_url
self.app_private_key_path = app_private_key_path
self.app_private_key = None
self.return_url = return_url
with open(self.app_private_key_path) as fp:
self.app_private_key = RSA.importKey(fp.read())
self.alipay_public_key_path = alipay_public_key_path
with open(self.alipay_public_key_path) as fp:
self.alipay_public_key = RSA.import_key(fp.read())
if debug is True:
self.__gateway = "https://openapi.alipaydev.com/gateway.do"
else:
self.__gateway = "https://openapi.alipay.com/gateway.do"
def direct_pay(self, subject, out_trade_no, total_amount, return_url=None, **kwargs):
biz_content = {
"subject": subject,
"out_trade_no": out_trade_no,
"total_amount": total_amount,
"product_code": "FAST_INSTANT_TRADE_PAY",
# "qr_pay_mode":4
}
biz_content.update(kwargs)
data = self.build_body("alipay.trade.page.pay", biz_content, self.return_url)
return self.sign_data(data)
def build_body(self, method, biz_content, return_url=None):
data = {
"app_id": self.appid,
"method": method,
"charset": "utf-8",
"sign_type": "RSA2",
"timestamp": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
"version": "1.0",
"biz_content": biz_content
}
if return_url is not None:
data["notify_url"] = self.app_notify_url
data["return_url"] = self.return_url
return data
def sign_data(self, data):
data.pop("sign", None)
# 排序后的字符串
unsigned_items = self.ordered_data(data)
unsigned_string = "&".join("{0}={1}".format(k, v) for k, v in unsigned_items)
sign = self.sign(unsigned_string.encode("utf-8"))
# ordered_items = self.ordered_data(data)
quoted_string = "&".join("{0}={1}".format(k, quote_plus(v)) for k, v in unsigned_items)
# 获得最终的订单信息字符串
signed_string = quoted_string + "&sign=" + quote_plus(sign)
return signed_string
def ordered_data(self, data):
complex_keys = []
for key, value in data.items():
if isinstance(value, dict):
complex_keys.append(key)
# 将字典类型的数据dump出来
for key in complex_keys:
data[key] = json.dumps(data[key], separators=(',', ':'))
return sorted([(k, v) for k, v in data.items()])
def sign(self, unsigned_string):
# 开始计算签名
key = self.app_private_key
signer = PKCS1_v1_5.new(key)
signature = signer.sign(SHA256.new(unsigned_string))
# base64 编码，转换为unicode表示并移除回车
sign = encodebytes(signature).decode("utf8").replace("\n", "")
return sign
def _verify(self, raw_content, signature):
# 开始计算签名
key = self.alipay_public_key
signer = PKCS1_v1_5.new(key)
digest = SHA256.new()
digest.update(raw_content.encode("utf8"))
if signer.verify(digest, decodebytes(signature.encode("utf8"))):
return True
return False
def verify(self, data, signature):
if "sign_type" in data:
sign_type = data.pop("sign_type")
# 排序后的字符串
unsigned_items = self.ordered_data(data)
message = "&".join(u"{}={}".format(k, v) for k, v in unsigned_items)
return self._verify(message, signature)
if __name__ == "__main__":
return_url = 'http://127.0.0.1:8000/?total_amount=100.00×tamp=2017-08-15+23%3A53%3A34&sign=e9E9UE0AxR84NK8TP1CicX6aZL8VQj68ylugWGHnM79zA7BKTIuxxkf%2FvhdDYz4XOLzNf9pTJxTDt8tTAAx%2FfUAJln4WAeZbacf1Gp4IzodcqU%2FsIc4z93xlfIZ7OLBoWW0kpKQ8AdOxrWBMXZck%2F1cffy4Ya2dWOYM6Pcdpd94CLNRPlH6kFsMCJCbhqvyJTflxdpVQ9kpH%2B%2Fhpqrqvm678vLwM%2B29LgqsLq0lojFWLe5ZGS1iFBdKiQI6wZiisBff%2BdAKT9Wcao3XeBUGigzUmVyEoVIcWJBH0Q8KTwz6IRC0S74FtfDWTafplUHlL%2Fnf6j%2FQd1y6Wcr2A5Kl6BQ%3D%3D&trade_no=2017081521001004340200204115&sign_type=RSA2&auth_app_id=2016080600180695&charset=utf-8&seller_id=2088102170208070&method=alipay.trade.page.pay.return&app_id=2016080600180695&out_trade_no=20170202185&version=1.0'
o = urlparse(return_url)
query = parse_qs(o.query)
processed_query = {}
ali_sign = query.pop("sign")[0]
alipay = AliPay(
appid="",
app_notify_url="http://127.0.0.1:8000/alipay/return/",
app_private_key_path="../trade/keys/private_2048.txt",
alipay_public_key_path="../trade/keys/alipay_key_2048.txt", # 支付宝的公钥，验证支付宝回传消息使用，不是你自己的公钥,
debug=True, # 默认False,
return_url="http://127.0.0.1:8000/alipay/return/"
)
for key, value in query.items():
processed_query[key] = value[0]
print (alipay.verify(processed_query, ali_sign))
url = alipay.direct_pay(
subject="测试订单2",
out_trade_no="20170202sss",
total_amount=100,
return_url="http://127.0.0.1:8000/alipay/return/"
)
re_url = "https://openapi.alipaydev.com/gateway.do?{data}".format(data=url)
print(re_url)
django集成支付宝notify_url和return_url接口
url(r'^alipay/return/', AlipayView.as_view(), name="alipay"),
from rest_framework.views import APIView
from utils.alipay import AliPay
from MxShop.settings import ali_pub_key_path, private_key_path
from rest_framework.response import Response
class AlipayView(APIView):
def get(self, request):
"""
处理支付宝的return_url返回
:param request:
:return:
"""
processed_dict = {}
for key, value in request.GET.items():
processed_dict[key] = value
sign = processed_dict.pop("sign", None)
alipay = AliPay(
appid="",
app_notify_url="http://127.0.0.1:8000/alipay/return/",
app_private_key_path=private_key_path,
alipay_public_key_path=ali_pub_key_path, # 支付宝的公钥，验证支付宝回传消息使用，不是你自己的公钥,
debug=True, # 默认False,
return_url="http://127.0.0.1:8000/alipay/return/"
)
verify_re = alipay.verify(processed_dict, sign)
if verify_re is True:
order_sn = processed_dict.get('out_trade_no', None)
trade_no = processed_dict.get('trade_no', None)
trade_status = processed_dict.get('trade_status', None)
existed_orders = OrderInfo.objects.filter(order_sn=order_sn)
for existed_order in existed_orders:
existed_order.pay_status = trade_status
existed_order.trade_no = trade_no
existed_order.pay_time = datetime.now()
existed_order.save()
from django.shortcuts import redirect
response = redirect("index") # 重定向。通过name=index的url中指定的template中的静态文件，生成新的html页面返回给前端
response.set_cookie("nextPath","pay", max_age=3) # 有效时间3秒
return response
else:
response = redirect("index")
return response
def post(self, request):
"""
处理支付宝的notify_url
:param request:
:return:
"""
processed_dict = {}
for key, value in request.POST.items():
processed_dict[key] = value
sign = processed_dict.pop("sign", None)
alipay = AliPay(
appid="",
app_notify_url="http://127.0.0.1:8000/alipay/return/",
app_private_key_path=private_key_path,
alipay_public_key_path=ali_pub_key_path, # 支付宝的公钥，验证支付宝回传消息使用，不是你自己的公钥,
debug=True, # 默认False,
return_url="http://127.0.0.1:8000/alipay/return/"
)
verify_re = alipay.verify(processed_dict, sign)
if verify_re is True:
order_sn = processed_dict.get('out_trade_no', None)
trade_no = processed_dict.get('trade_no', None)
trade_status = processed_dict.get('trade_status', None)
existed_orders = OrderInfo.objects.filter(order_sn=order_sn)
for existed_order in existed_orders:
order_goods = existed_order.goods.all()
for order_good in order_goods:
goods = order_good.goods
goods.sold_num += order_good.goods_num
goods.save()
existed_order.pay_status = trade_status
existed_order.trade_no = trade_no
existed_order.pay_time = datetime.now()
existed_order.save()
return Response("success")
class OrderSerializer(serializers.ModelSerializer):
user = serializers.HiddenField(
default=serializers.CurrentUserDefault()
)
pay_status = serializers.CharField(read_only=True)
trade_no = serializers.CharField(read_only=True)
order_sn = serializers.CharField(read_only=True)
pay_time = serializers.DateTimeField(read_only=True)
alipay_url = serializers.SerializerMethodField(read_only=True)
def get_alipay_url(self, obj):
alipay = AliPay(
appid="",
app_notify_url="http://127.0.0.1:8000/alipay/return/",
app_private_key_path=private_key_path,
alipay_public_key_path=ali_pub_key_path, # 支付宝的公钥，验证支付宝回传消息使用，不是你自己的公钥,
debug=True, # 默认False,
return_url="http://127.0.0.1:8000/alipay/return/"
)
url = alipay.direct_pay(
subject=obj.order_sn,
out_trade_no=obj.order_sn,
total_amount=obj.order_mount,
)
re_url = "https://openapi.alipaydev.com/gateway.do?{data}".format(data=url)
return re_url
def generate_order_sn(self):
# 当前时间+userid+随机数
from random import Random
random_ins = Random()
order_sn = "{time_str}{userid}{ranstr}".format(time_str=time.strftime("%Y%m%d%H%M%S"),
userid=self.context["request"].user.id, ranstr=random_ins.randint(10, 99))
return order_sn
def validate(self, attrs):
attrs["order_sn"] = self.generate_order_sn()
return attrs
class Meta:
model = OrderInfo
fields = "__all__"
支付成功后回调到支付前的页面
有3种方案：
1、建议采用DJANGO后端来生成html页面的方式（本次采用该方案，快速暴力）
2、返回给vue前端，vue页面拿到支付宝的响应url中的参数，往Django后端完成数据保存并返回数据，
再根据返回的数据重新加载页面。
3、通过支付宝来生成支付页面图片（参考支付宝页面生成API开发文档），这样无需进行页面跳转，即可在同一页面完成数据的加载。
url(r'^index/', TemplateView.as_view(template_name="index.html"), name="index"),
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