Django 对接 支付宝支付, 回调

支付宝支付, 回调"/>

Django 对接 支付宝支付, 回调

平台 

点击这里进入 蚂蚁金服开放平台

沙箱

点击这里进入 沙箱环境 

初始界面

设置公钥

下载创建秘钥工具

1.  进入文档中心 这里 

2. 选中 电脑网站支付

3. 进入后选中 API 列表 中的 统一收单下单并支付页面接口

 

 4. 进入后点击 sign 的 签名

 

5. 进入后选择第一步, 然后选择 windows 下载工具

生成秘钥

下载解压后运行

会自动保存两份 txt, 这两个文件一定要妥善保管

 

保存秘钥

将两个文件要做个修改, 最前和最后加上这两行, 且不要用中文命名

-----BEGIN PRIVATE KEY-----
...
-----END PRIVATE KEY-----

将两个文件保存在在项目文件的订单程序下

同时再吧页面上的支付宝公钥复制下来保存在自己的项目中, 和上面类似的格式

设置公钥

注意是公钥, 

订单URL 生成

目录结构

订单URL 生成逻辑文件

详细的API对接处理 这里  (内含所有的详细的参数选择)

相关的 python 实现代码 github 上都有,详情 这里

 Python 官方没有提供指引, 可以使用此文件代码来实现 url 的生成

# _*_ coding:utf-8 _*_
__author__ = "yangtuo"
__date__ = "2019/4/24 16:25"# -*- coding: utf-8 -*-# pip install pycryptodomefrom 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, encodebytesimport jsonclass 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 = appidself.app_notify_url = app_notify_urlself.app_private_key_path = app_private_key_pathself.app_private_key = Noneself.return_url = return_urlwith open(self.app_private_key_path) as fp:self.app_private_key = RSA.importKey(fp.read())self.alipay_public_key_path = alipay_public_key_pathwith open(self.alipay_public_key_path) as fp:self.alipay_public_key = RSA.import_key(fp.read())if debug is True:self.__gateway = ".do"else:self.__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_urldata["return_url"] = self.return_urlreturn datadef 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_stringdef 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_keysigner = 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 signdef _verify(self, raw_content, signature):# 开始计算签名key = self.alipay_public_keysigner = PKCS1_v1_5.new(key)digest = SHA256.new()digest.update(raw_content.encode("utf8"))if signer.verify(digest, decodebytes(signature.encode("utf8"))):return Truereturn Falsedef 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="",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 = ".do?{data}".format(data=url)print(re_url)

alipay.py

.do?app_id=2016100100636029&biz_content=%7B%22subject%22%3A%22%5Cu6d4b%5Cu8bd5%5Cu8ba2%5Cu53552%22%2C%22out_trade_no%22%3A%2220170202sss%22%2C%22total_amount%22%3A100%2C%22product_code%22%3A%22FAST_INSTANT_TRADE_PAY%22%7D&charset=utf-8&method=alipay.trade.page.pay&notify_url=http%3A%2F%2F127.0.0.1%3A8000%2Falipay%2Freturn%2F&return_url=http%3A%2F%2F127.0.0.1%3A8000%2Falipay%2Freturn%2F&sign_type=RSA2&timestamp=2019-04-24+16%3A40%3A17&version=1.0&sign=w4mdZOool9ne634Hf59g%2FV9cjj7ctzp37D5fs0U9xvOrDOBih%2FkpwrMXyWj5oVk%2FGETPx0RT7AkyOmnNSdF%2BTOCHkF4BAhABhbKLvaQfUqRdwIqGgvSKt18GGHVweg3BMh0hkrfzEuREVNkZlH2BpYD0UP5FS2PTVd90YnBJaWcJ%2BGyhizF5qlOAYIYFghbx9EKKo5e37peq%2BiVzme6Yui0FW%2ByGbtb54V2Slbo0iaPFq67pVUeBk%2BGprov6hBNxaVsz8O069z7IcIlzwFaSkYVxPB5dSAa6UWhMwCOdqMcO90LWCAhYYeF5yS%2BzJa1Mp95gQhHNTP2L5WfYp4T0uQ%3D%3D

生成的 url

订单付款

 订单付款界面

基于alipay.py 中的参数进行相关的设置之后生成的 url 访问即可进入付款界面

 

付款账号

沙箱环境的付款只能基于特定的账号或者指定的 沙箱支付宝软件才可以进行付款操作, 利用此账号付款后会基于是否设置回调决定下一步操作

付款成功回调

回调基于 return_url 以及 notify_url 两字段都是非必填, 如果不设置支付成功后悔进入成功页面无任何跳转即回调

return_url  同步接口

此跳转只在 PC 上支付成功后实现跳转, 只支持当前一次的请求处理

用户支付完成后, 支付宝基于此参数, 通过 GET 请求形式将部分支付结果参数通知到商户系统

notify_url  异步接口

允许订单的异步请求, 实现订单的延迟或者另外平台的后续付款请求

用户支付完成后, 支付宝基于此参数, 通过 POST 请求形式将部分支付结果参数通知到商户系统

简述总结

notify_url 是支付宝模拟post数据给你,只要状态改变就会post给你

return_url 是跳转,用户付款后跳转到你的页面.只有第一次会通知你,以后不会了. 

订单状态

订单状态是支付宝指定的4种, 在自己的代码中的订单model 的订单状态字段也最好遵循

    ORDER_STATUS = (("TRADE_SUCCESS", "成功"),("TRADE_CLOSED", "超时关闭"),("WAIT_BUYER_PAY", "交易创建"),("TRADE_FINISHED", "交易结束"),("paying", "待支付"),)pay_status = models.CharField(choices=ORDER_STATUS, default="paying", max_length=30, verbose_name="订单状态")

视图编写

前面又说两个 URL 的请求方式不同, 因此我们基于此进行区分, 然后通过在request 中取到相关的字段完成数据库的更新以及相关的跳转

return_url 最常见的请求是返回商户, 或者返回首页

notify_url 需要回传一个 "success" 信息给支付宝, 不然支付宝会一直像我们发送信息提示 ( 24h22m,8次 )

具体代码

# 支付宝支付
class AlipayView(APIView):  # 没有 model 就直接 APIView 就可以了# 处理支付宝的return_url返回def get(self, request):processed_dict = {}for key, value in request.GET.items():processed_dict[key] = valuesign = processed_dict.pop("sign", None)alipay = AliPay(appid="20xxxxxxx029",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_statusexisted_order.trade_no = trade_noexisted_order.pay_time = datetime.now()existed_order.save()response = redirect("index")response.set_cookie("nextPath", "pay", max_age=3)return responseelse:response = redirect("index")return response# 处理支付宝的notify_urldef post(self, request):processed_dict = {}for key, value in request.POST.items():processed_dict[key] = valuesign = processed_dict.pop("sign", None)alipay = AliPay(appid="20xxxxxxx029",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)  # 商户网站唯一订单号trade_no = processed_dict.get('trade_no', None)  # 支付宝交易流水号trade_status = processed_dict.get('trade_status', None)  # 支付宝订单状态# 查询本地是否有此订单existed_orders = OrderInfo.objects.filter(order_sn=order_sn)# 更新订单状态for existed_order in existed_orders:order_goods = existed_order.goods.all()for order_good in order_goods:goods = order_good.goodsgoods.sold_num += order_good.goods_numgoods.save()existed_order.pay_status = trade_statusexisted_order.trade_no = trade_noexisted_order.pay_time = datetime.now()existed_order.save()return Response("success")

其他联调

 订单的序列化组件中的 alipay_url 字段生成

    # 支付宝相关的字段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 = ".do?{data}".format(data=url)return re_url

事后补充

支付宝改版后新版的支付宝的 return_url  返回数据中不再包含 trade_status, 即无法通过此参数进行订单状态的修改了.

但是 notify_url 不受影响, 对此的解释很大可能是安全问题,  需要商户自行再次进行一个判断状态想的逻辑处理. 

修正后源码

class AlipayView(APIView):def get(self, request):"""处理支付宝的return_url返回"""processed_dict = {}# 1. 获取GET中参数for key, value in request.GET.items():processed_dict[key] = value# 2. 取出signsign = processed_dict.pop("sign", None)# 3. 生成ALipay对象alipay = AliPay(appid="2016091200490210",app_notify_url="http://115.159.122.64:8000/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://115.159.122.64:8000/alipay/return/")verify_re = alipay.verify(processed_dict, sign)# 这里可以不做操作。因为不管发不发return url。notify url都会修改订单状态。if verify_re is True:order_sn = processed_dict.get('out_trade_no', None)trade_no = processed_dict.get('trade_no', None)existed_orders = OrderInfo.objects.filter(order_sn=order_sn)for existed_order in existed_orders:existed_order.trade_no = trade_noexisted_order.pay_time = datetime.now()existed_order.save()response = redirect("/index/#/app/home/member/order")# response.set_cookie("nextPath","pay", max_age=3)return responseelse:response = redirect("index")return responsedef post(self, request):"""处理支付宝的notify_url"""# 1. 先将sign剔除掉processed_dict = {}for key, value in request.POST.items():processed_dict[key] = valuesign = processed_dict.pop("sign", None)# 2. 生成一个Alipay对象alipay = AliPay(appid="2016091200490210",app_notify_url="http://115.159.122.64:8000/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://115.159.122.64:8000/alipay/return/")# 3. 进行验签，确保这是支付宝给我们的verify_re = alipay.verify(processed_dict, sign)# 如果验签成功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)# 查询数据库中存在的订单existed_orders = OrderInfo.objects.filter(order_sn=order_sn)for existed_order in existed_orders:# 订单商品项order_goods = existed_order.goods.all()# 商品销量增加订单中数值for order_good in order_goods:goods = order_good.goodsgoods.sold_num += order_good.goods_numgoods.save()# 更新订单状态，填充支付宝给的交易凭证号。existed_order.pay_status = trade_statusexisted_order.trade_no = trade_noexisted_order.pay_time = datetime.now()existed_order.save()# 将success返回给支付宝，支付宝就不会一直不停的继续发消息了。return Response("success")

 

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