django实现多种支付方式
'''#思路 我们希望，通过插拔的方式来实现多方式登录，比如新增一种支付方式，那么只要在项目中新增一个py文件，导入里面的pay方法就可以了，这样在支付业务中支付语句是不发生变化的。 所以就可以使用python的鸭子类型及面向对象的反射方法来实现功能'''##新建一个Pay文件夹，里面放支付方式.py文件#Alipay.pyclass Alipay: def pay(self): pass#Visapay.pyclass Visapay: def pay(self): pass#Wxpay.py（完全按照接口文档来得）import time#记得导入商户号和key哦！from app01.wx import settingsclass Wxpay: def pay(self,order_data): self.order_id = order_data["order_id"] self.open_id = order_data['open_id'] self.ip = order_data['ip'] data_body = self.get_body_data() import requests url = "https://api.mch.weixin.qq.com/pay/unifiedorder" response = requests.post(url, data_body.encode("utf-8"), headers={'content-type': "application/xml"}) res_dict = self.xml_to_dic(response.content) timeStamp = str(int(time.time())) paySign = self.get_pay_sign(res_dict, timeStamp) data_dic = { 'timeStamp': timeStamp, 'nonceStr': res_dict['nonce_str'], 'package': f"prepay_id={res_dict['prepay_id']}", 'signType': 'MD5', "paySign": paySign, } return data_dic def get_pay_sign(self, res_dict, timeStamp): print("res_dict", res_dict) data_dic = { 'appId': res_dict['appid'], 'timeStamp': timeStamp, 'nonceStr': res_dict['nonce_str'], 'package': f"prepay_id={res_dict['prepay_id']}", "signType": "MD5" } sign_str = "&".join([f"{k}={data_dic[k]}" for k in sorted(data_dic)]) sign_str = f"{sign_str}&key={settings.pay_apikey}" import hashlib md5 = hashlib.md5() md5.update(sign_str.encode("utf-8")) sign = md5.hexdigest() return sign.upper() def xml_to_dic(self, xml_data): import xml.etree.ElementTree as ET ''' xml to dict :param xml_data: :return: ''' xml_dict = {} root = ET.fromstring(xml_data) for child in root: xml_dict[child.tag] = child.text return xml_dict def get_random(self): import random data = "123456789zxcvbnmasdfghjklqwertyuiopZXCVBNMASDFGHJKLQWERTYUIOP" nonce_str = "".join(random.sample(data, 30)) return nonce_str def get_sign(self): data_dic = { "nonce_str": self.nonce_str, "out_trade_no": self.out_trade_no, "spbill_create_ip": self.spbill_create_ip, "notify_url": self.notify_url, "openid": self.open_id, "body": self.body, "trade_type": "JSAPI", "appid": self.appid, "total_fee": "1", "mch_id": self.mch_id } sign_str = "&".join([f"{k}={data_dic[k]}" for k in sorted(data_dic)]) sign_str = f"{sign_str}&key={settings.pay_apikey}" import hashlib md5 = hashlib.md5() md5.update(sign_str.encode("utf-8")) sign = md5.hexdigest() return sign.upper() def get_body_data(self): self.appid = settings.AppId # openid=self.open_id self.mch_id = str(settings.pay_mchid) self.nonce_str = self.get_random() self.out_trade_no = self.order_id self.spbill_create_ip = self.ip self.notify_url = "https://www.test.com" self.body = "老男孩学费" self.sign = self.get_sign() body_data = f""" <xml> <appid>{self.appid}</appid> <mch_id>{self.mch_id}</mch_id> <nonce_str>{self.nonce_str}</nonce_str> <sign>{self.sign}</sign> <body>{self.body}</body> <out_trade_no>{self.out_trade_no}</out_trade_no> <total_fee>1</total_fee> <spbill_create_ip>{ self.spbill_create_ip}</spbill_create_ip> <notify_url>{self.notify_url}</notify_url> <openid>{self.open_id}</openid> <trade_type>JSAPI</trade_type> </xml>""" return body_data ##调用支付方法的语句（一般支付都是发生在订单创建好之后）import importlibfrom rest_framework.response import Responsepay_method = "Wxpay" #这里是举例子，所以把pay_method写死了，正常情况下，应该是外面传来的支付方式，然后用pay_method接收try: #用字符串导入支付方式的py文件,例如这里的app01.Pay.{pay_method} pay_field = importlib.import_module(f"app01.Pay.{pay_method}") #用反射拿到该文件下面的类 pay_method_class = getattr(pay_field, pay_method)except: return Response({"code": 205, "msg": "错误的支付方式"})order_data['ip'] = host_iporder_data['open_id'] = open_id#完成支付，并把支付数据返回pay_data = pay_method_class().pay(order_data)'''这里直接用反射拿到的支付类，然后使用它的pay方法，完成支付'''return Response({"code": 200, "msg": "ok", "data": pay_data})
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