import jsonimport hashlibfrom urllib.parse import urlencodefrom random import Randomimport requestsfrom django.http import HttpResponse, HttpResponseRedirectnotify_url = "....../wx_result_H/" # 回调函数，完整路由，服务器要带上域名，对应的视图是下面3中的回调函数trade_type = ‘MWEB‘ # 交易方式APP_ID = "wx......" # 公众账号的appidMCH_ID = "......" # 商户号API_KEY = "......" # 微信商户平台(pay.weixin.qq.com) -->账户设置 -->API安全 -->密钥设置，设置完成后把密钥复制到这里UFDODER_URL = "https://api.mch.weixin.qq.com/pay/unifiedorder" # 该url是微信下单apiCREATE_IP = ‘......‘ # 服务器IP

def wx_pay_H(request): # data = json.loads(request.body) # print(request.body) total_price = 0.01 # 订单总价 order_name = ‘商品费用‘ # 订单名字 order_detail = ‘商品费用‘ # 订单描述 order_id = 20200411234567 # 自定义的订单号 data_dict = wxpay(order_id, order_name, order_detail, total_price) # 如果请求成功 if data_dict.get(‘return_code‘) == ‘SUCCESS‘: # 请求成功跳转微信中间页面进行支付 mweb_url = data_dict.get(‘mweb_url‘, "") if mweb_url: # print(mweb_url, type(mweb_url)) return HttpResponseRedirect(urlencode({"mweb_url": mweb_url})) s = { "code": 1001, "msg": "获取失败", "data": "" } s = json.dumps(s, ensure_ascii=False) return HttpResponse(s)

def wx_result_n(request): data_dict = trans_xml_to_dict(request.body) # 回调数据转字典 print(‘支付回调结果‘, data_dict) sign = data_dict.pop(‘sign‘) # 取出签名 back_sign = get_sign(data_dict, API_KEY) # 计算签名 # 验证签名是否与回调签名相同 if sign == back_sign and data_dict[‘return_code‘] == ‘SUCCESS‘: order_no = data_dict[‘out_trade_no‘] # 处理支付成功逻辑，根据订单号修改后台数据库状态 # 返回接收结果给微信，否则微信会每隔8分钟发送post请求 return HttpResponse(trans_dict_to_xml({‘return_code‘: ‘SUCCESS‘, ‘return_msg‘: ‘OK‘})) return HttpResponse(trans_dict_to_xml({‘return_code‘: ‘FAIL‘, ‘return_msg‘: ‘SIGNERROR‘}))

def random_str(randomlength=8): """ 生成随机字符串 :param randomlength: 字符串长度 :return: """ strs = ‘‘ chars = ‘AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz0123456789‘ length = len(chars) - 1 random = Random() for i in range(randomlength): strs += chars[random.randint(0, length)] print(strs) return strsdef wxpay(order_id, order_name, order_price_detail, order_total_price): nonce_str = random_str() # 拼接出随机的字符串即可，我这里是用 时间+随机数字+5个随机字母 total_fee = int(float(order_total_price) * 100) # 付款金额，单位是分，必须是整数 print(total_fee) params = { ‘appid‘: APP_ID, # APPID ‘mch_id‘: MCH_ID, # 商户号 ‘nonce_str‘: nonce_str, # 随机字符串 ‘out_trade_no‘: order_id, # 订单编号，可自定义 ‘total_fee‘: total_fee, # 订单总金额 ‘spbill_create_ip‘: CREATE_IP, # 自己服务器的IP地址 ‘notify_url‘: notify_url, # 回调地址，微信支付成功后会回调这个url，告知商户支付结果 ‘body‘: order_name, # 商品描述 ‘detail‘: order_price_detail, # 商品描述 ‘trade_type‘: trade_type, # 扫码支付类型 } sign = get_sign(params, API_KEY) # 获取签名 params[‘sign‘] = sign # 添加签名到参数字典 xml = trans_dict_to_xml(params) # 转换字典为XML response = requests.request(‘post‘, UFDODER_URL, data=xml.encode()) # 以POST方式向微信公众平台服务器发起请求 data_dict = trans_xml_to_dict(response.content) # 将请求返回的数据转为字典 print(data_dict) return data_dictdef get_sign(data_dict, key): """ 签名函数 :param data_dict: 需要签名的参数，格式为字典 :param key: 密钥 ，即上面的API_KEY :return: 字符串 """ params_list = sorted(data_dict.items(), key=lambda e: e[0], reverse=False) # 参数字典倒排序为列表 params_str = "&".join(u"{}={}".format(k, v) for k, v in params_list) + ‘&key=‘ + key # 组织参数字符串并在末尾添加商户交易密钥 md5 = hashlib.md5() # 使用MD5加密模式 md5.update(params_str.encode(‘utf-8‘)) # 将参数字符串传入 sign = md5.hexdigest().upper() # 完成加密并转为大写 print(sign) return signdef trans_dict_to_xml(data_dict): """ 定义字典转XML的函数 :param data_dict: :return: """ data_xml = [] for k in sorted(data_dict.keys()): # 遍历字典排序后的key v = data_dict.get(k) # 取出字典中key对应的value if k == ‘detail‘ and not v.startswith(‘<![CDATA[‘): # 添加XML标记 v = ‘<![CDATA[{}]]>‘.format(v) data_xml.append(‘<{key}>{value}</{key}>‘.format(key=k, value=v)) return ‘<xml>{}</xml>‘.format(‘‘.join(data_xml)) # 返回XMLdef trans_xml_to_dict(data_xml): """ 定义XML转字典的函数 :param data_xml: :return: """ data_dict = {} try: import xml.etree.cElementTree as ET except ImportError: import xml.etree.ElementTree as ET root = ET.fromstring(data_xml) for child in root: data_dict[child.tag] = child.text return data_dict