10-支付功能

一、支付功能

1、Pycharm远程代码调试

　　通过设置Pycharm来调试远端的服务器，为啥要用Pycharm调试远端服务器的代码？是因为关于第三方支付以及第三方登录，都是有一个回调的URL，这个URL一般指向的是服务器的IP地址，如何将本地代码上传到服务器中？

　

 

 

 在windows下如何连接远程服务器呢？下载一个轻量级的连接远程服务器的客户端secureCRT。（下载注册机注册）

 

 

 

 在这里面指明远程服务器的Hsotname与Username就可以连接远程服务器啦。连接远程服务器，过一段时间会自动退出来，怎么防止它退出来呢？安装一个工具可以防止它退出来：

yum install tmux   #centos 7   屏幕管理里面很好用的

直接命令tmux就可以进入屏幕管理，这样客户端就不会关闭掉。创建一个文件夹mkdir projects,新建其他用户，最好不要用root用户。进入新建的目录继续新建目录mkdir MxShop，建好之后就可以去Pycharm配置啦

tmux

 

 这样做的目的，就是在本地写的代码会映射到阿里云服务器上。接下来就可以将本地代码上传到云服务器啦。仔细看也可以将服务器的代码下载下来，甚至也可以同步。

　　上传之后，不代表可以调试远程服务器的代码，必须还需要在远程服务器上创建虚拟环境，还需要在虚拟服务器上安装python版本与项目python版本一致。同时在本地将数据库传输到阿里云服务器的数据库上，需要进行相关设置，否则数据库端口不对外开放。

 2、支付宝公钥、私钥和沙箱环境的配置

为了测试支付环境，支付宝必须需要企业账号，我们个人开发者测试没有企业账号，因此支付宝提供了沙箱环境供给个人测试支付。

 

 在接口文档中，有很多支付接口。

 

 

 

 

 

 

 

 这样就完成沙箱环境的配置。

3、支付宝支付源码解读

虚拟环境安装支付宝源码所需要的包：然后utils下面建立alipay.py文件，将下面代码复制进去

 pip3 install -i https//pypi.douban.com/simple pycryptodome

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("
", "")
        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&timestamp=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="xxxxxxxxx", #支付宝沙盒环境中的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,   路径是相对路径
        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)  

将打印的路由拿到浏览器中访问。利用沙盒环境中测试账号登录支付查看是否正常。

 

 4、django集成支付宝notify_url和return_url接口

MxShop/settings.py:

#支付宝相关设置
private_key_path = os.path.join(BASE_DIR, 'apps/trade/keys/private_2048.txt')
ali_pub_key_path = os.path.join(BASE_DIR, 'apps/trade/keys/alipay_key_2048.txt')

trade/views.py:

将noyify_url以及return_url都改成服务器地址，如果是远程服务就改成远程服务器地址。

from django.shortcuts import redirect
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="xxxxxxxxx",
            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()

            response = redirect("index")
            response.set_cookie("nextPath", "pay", max_age=3)
            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")

MxShop/settings.py:

from trade.views import AliPayview


urlpatterns = [
     path('alipay/return/',AliPayview.as_view(),name="alipay"),    
]

trade/serializers.py:

class OrderDetailSerializer(serializers.ModelSerializer):
    #OrderInfo中的外键order需要设置relate_name
    goods = OrderGoodsSerializer(many=True)
    alipay_url = serializers.SerializerMethodField(read_only=True)

    def get_alipay_url(self, obj):
        alipay = AliPay(
            appid="xxxxxx",
            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_amount,
            return_url="http://127.0.0.1:8000/alipay/return/"
        )
        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)
    order_sn = serializers.CharField(read_only=True)
    trade_no = serializers.CharField(read_only=True)
    pay_time = serializers.CharField(read_only=True)
    alipay_url = serializers.SerializerMethodField(read_only=True)

    def get_alipay_url(self,obj):
        alipay = AliPay(
            appid="xxxxxxxx",
            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_amount,
            return_url="http://127.0.0.1:8000/alipay/return/"
        )
        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_int = 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_int.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__"

　　为了让支付宝支付后能将网页跳转到网购页面，因此需要将前端vue的用django控制，django控制需要将前端的静态文件以及首页放在django项目文件下，在dos命令中的前端项目路径下运行这个，将vue的打包成静态文件。

cnpm run build

文件中将index.html放在template下面，其他文件全部放在static文件下，然后去项目设置里面配置静态文件路径。

#将静态文件添加到全局路径
STATICFILES_DIR = (
    os.path.join(BASE_DIR,"static"),
)

配置index.html的路由：

from django.views.generic import TemplateView


urlpatterns = [
    path('index/', TemplateView.as_view(template_name="index.html"),name="index"),
]

用项目路由访问，收藏购物车，下单支付。如下图：

 

 

 

 支付成功后会自动跳转到首页。