Django实现支付宝付款和微信支付的示例代码


Posted in Python onJuly 25, 2018

支付宝支付和微信支付是当今互联网产品常用的功能,我使用Django Rest Framework实现了网页上支付宝支付和微信支付的一个通用服务,提供rpc接口给其他服务,包括获取支付宝支付页面url的rpc接口、支付宝支付成功异步回调http接口、获取微信支付二维码rpc接口、主动查询微信订单是否支付的rpc接口等。

支付宝网站支付需要蚂蚁金服开放平台账号,创建应用、配置秘钥等步骤请参考:蚂蚁金服支付宝电脑网站支付快速接入

微信网站支付需要到微信支付官网注册服务商账号,

目录结构如下:

Django实现支付宝付款和微信支付的示例代码

1、models.py

from django.db import models
from django.contrib.postgres.fields import ArrayField

# Create your models here.
class BaseModel(models.Model):
 """
  基础模型
 """
 created_time = models.DateTimeField(auto_now_add=True, verbose_name="创建时间")
 updated_time = models.DateTimeField(auto_now=True, verbose_name="修改时间")
 created_by = models.IntegerField(verbose_name="创建人ID")
 updated_by = models.IntegerField(verbose_name="修改人ID")
 is_active = models.BooleanField(default=True, verbose_name='是否正常')

 class Meta:
  abstract = True


class Alipay(BaseModel):
 """
  支付
 """

 subject = models.CharField(max_length=256, verbose_name="订单标题")
 out_trade_no = models.CharField(max_length=64, unique=True, verbose_name="唯一订单号")
 trade_no = models.CharField(default="", max_length=64, verbose_name="支付宝系统中的交易流水号")
 total_amount = models.DecimalField(max_digits=11, decimal_places=2, verbose_name="订单的资金总额")
 return_url = models.CharField(max_length=500, verbose_name="支付完成同步跳转地址")
 notify_url = models.CharField(max_length=500, verbose_name="支付完成异步通知rpc地址")
 pay_time = models.DateTimeField(null=True, blank=True, verbose_name="支付时间")
 pay_nos = ArrayField(models.CharField(max_length=100), default=[], verbose_name='同一订单的支付ID数组')

 class Meta:
  verbose_name = "阿里支付"
  verbose_name_plural = verbose_name
  ordering = ('-created_time',)


class Wxorder(BaseModel):
 """
  订单
 """
 body = models.CharField(max_length=256, verbose_name="商品描述")
 out_trade_no = models.CharField(max_length=64, unique=True, verbose_name="订单号")
 transaction_id = models.CharField(default="", max_length=64, verbose_name="微信支付订单号")
 total_fee = models.BigIntegerField(verbose_name="订单的资金总额,单位为分")
 product_id = models.CharField(max_length=16, verbose_name="商品ID")
 notify_url = models.CharField(max_length=500, verbose_name="支付完成通知url")
 pay_time = models.DateTimeField(null=True, blank=True, verbose_name="支付时间")

 class Meta:
  verbose_name = "微信订单"
  verbose_name_plural = verbose_name
  ordering = ('-created_time',)


class Wxpay(BaseModel):
 """
  微信支付
 """
 out_trade_no = models.CharField(null=True, blank=True, max_length=64, verbose_name="订单号")
 pay_no = models.CharField(null=True, blank=True, max_length=64, unique=True, verbose_name="支付唯一订单号")
 code_url = models.CharField(null=True, blank=True, max_length=100, verbose_name="二维码地址")
 nonce_str = models.CharField(null=True, blank=True, max_length=32, verbose_name="随机字符串")

 class Meta:
  verbose_name = "微信支付"
  verbose_name_plural = verbose_name
  ordering = ('-created_time',)

2、serializers.py:

from django.conf import settings
from rest_framework import serializers
from pay.models import Alipay, Wxpay

class BaseSerializer(serializers.ModelSerializer):
 created_time = serializers.DateTimeField(format=settings.DATETIME_FORMAT, read_only=True)
 updated_time = serializers.DateTimeField(format=settings.DATETIME_FORMAT, read_only=True)
 is_active = serializers.BooleanField(read_only=True)

 class Meta:
  model = None


class AlipaySerializer(BaseSerializer):
 """
  阿里支付序列化类
 """

 class Meta:
  model = Alipay
  fields = "__all__"


class WxpaySerializer(BaseSerializer):
 """
  阿里支付序列化类
 """

 class Meta:
  model = Wxpay
  fields = "__all__"

3、views.py:

# -*- coding=utf-8 -*-
# Create your views here.
import time
import dicttoxml
from jsonrpc import jsonrpc_method
from rest_framework.decorators import list_route
from rest_framework.response import Response
from rest_framework.viewsets import ModelViewSet
from rest_framework.views import APIView
from rest_framework_xml.parsers import XMLParser
from rest_framework_xml.renderers import XMLRenderer
from tokenauth.decorators import is_login
from pay import utils
from pay.weixin_pay import WeiXinPay, UnifiedOrderPay, OrderQuery
from pay.UUIDTools import UUIDTools
from pay.models import Alipay, Wxpay, Wxorder
from pay.serializers import AlipaySerializer, WxpaySerializer
from pay.utils import UnActiveModelMixin
from pay.alipay import AliPay
from PAY_SERVICE.settings.base import APPID, PRIVATE_KEY_PATH, \
 ALI_PUB_KEY_PATH, ALIPAY_CALLBACK_URL, \
 WXAPPID, WX_PAY_KEY, WX_MCH_ID, WXPAY_CALLBACK_URL

NOTIFY_URL = ALIPAY_CALLBACK_URL + 'api/v1.0/pay/alipay/notify/'

class AlipayViewSet(ModelViewSet):
 queryset = Alipay.objects.filter(is_active=True)
 serializer_class = AlipaySerializer

 @list_route(methods=['post'])
 def notify(self, request):
  """ 
   处理支付宝的notify_url
  :param request:
  :return:
  """
  processed_dict = {}
  for k, v in request.data.items():
   processed_dict[k] = v
  app_id = processed_dict.get('app_id')
  pay_no = processed_dict.get('out_trade_no')
  trade_no = processed_dict.get('trade_no')
  total_amount = processed_dict.get('total_amount')
  pay_time = time.strftime('%Y-%m-%d %H:%M:%S',time.localtime())

  alipay = Alipay.objects.filter(pay_nos__contains=[pay_no]).values().first()
  if alipay is None:
   return Response("failed")
  if str(alipay.get('total_amount')) != str(total_amount):
   return Response("failed")
  if app_id != APPID:
   return Response("failed")
  if alipay.get('trade_no') != "":
   return Response("failed")

  sign = processed_dict.pop('sign', None)

  ali_pay = AliPay(
   appid=APPID,
   app_notify_url=NOTIFY_URL,
   app_private_key_path=PRIVATE_KEY_PATH,
   alipay_public_key_path=ALI_PUB_KEY_PATH,
   debug=True, # 默认False,
   return_url=alipay.get('return_url')
  )

  is_verify = ali_pay.verify(processed_dict, sign)

  if is_verify is True:
   Alipay.objects.filter(pk=alipay.get('id')).update(pay_time=pay_time, trade_no=trade_no)
   ret = utils.request_thrift('TradingManager', 'notify',
    settings.TRADING_RPC_IP, int(settings.TRADING_RPC_PORT),
    alipay.get('out_trade_no'), str(pay_time))
   if ret == "success":
    return Response("success")


class WxpayViewSet(ModelViewSet):
 queryset = Wxpay.objects.filter(is_active=True)
 serializer_class = WxpaySerializer
 parser_classes = (XMLParser,)
 renderer_classes = (XMLRenderer,)


@jsonrpc_method('pay.get_alipay_url')
def get_alipay_url(request, subject, out_trade_no, total_amount, return_url, notify_url, user_id):
 recode = Alipay.objects.filter(out_trade_no=out_trade_no).values().first()
 if recode is not None:
  pay_no = UUIDTools.datetime_random()
  alipay = Alipay.objects.get(pk=recode.get('id'))
  alipay.pay_nos.append(pay_no)
  alipay.save()
 else:
  pay_no = out_trade_no
  Alipay.objects.create(subject=subject,
        out_trade_no=out_trade_no,
        total_amount=total_amount,
        return_url=return_url,
        notify_url=notify_url,
        pay_nos=[pay_no],
        created_by=user_id,
        updated_by=user_id
        )

 ali_pay = AliPay(
  appid=APPID,
  app_notify_url=NOTIFY_URL,
  app_private_key_path=PRIVATE_KEY_PATH,
  alipay_public_key_path=ALI_PUB_KEY_PATH,
  debug=True, # 默认False,
  return_url=return_url
 )

 total_amount = "%.2f" % float(total_amount)
 url = ali_pay.direct_pay(
  subject=subject,
  out_trade_no=pay_no,
  total_amount=total_amount
 )
 # 沙箱环境网关
 # alipay_url = "https://openapi.alipaydev.com/gateway.do?{data}".format(data=url)
 # 正式环境网关
 alipay_url = "https://openapi.alipay.com/gateway.do?{data}".format(data=url)
 return alipay_url


@jsonrpc_method('pay.get_wxpay_url')
def get_wxpay_url(request, out_trade_no, body, total_fee, notify_url, product_id, user_id):
 recode = Wxorder.objects.filter(out_trade_no=out_trade_no).values().first()
 if recode is None:
  Wxorder.objects.create(
   out_trade_no=out_trade_no,
   body=body,
   total_fee=total_fee,
   notify_url=notify_url,
   product_id=product_id,
   created_by=user_id,
   updated_by=user_id
  )

 pay_no = UUIDTools.datetime_random()
 pay = UnifiedOrderPay(WXAPPID, WX_MCH_ID, WX_PAY_KEY)
 response = pay.post(body, pay_no, total_fee,
      WXPAY_CALLBACK_URL.split('://')[1].split(':')[0], WX_NOTIFY_URL)
 if response and response["return_code"] == "SUCCESS" and response["result_code"] == "SUCCESS":
  wxorder = Wxorder.objects.filter(out_trade_no=out_trade_no).values().first()
  Wxpay.objects.create(
   out_trade_no=out_trade_no,
   pay_no=pay_no,
   code_url=response.get('code_url'),
   nonce_str=response.get('nonce_str'),
   created_by=user_id,
   updated_by=user_id
  )
  return response.get('code_url')


@jsonrpc_method('pay.wx_order_query')
def wx_order_query(request, out_trade_no):
 wxpays = Wxpay.objects.filter(out_trade_no=out_trade_no).values()
 pay = OrderQuery(WXAPPID, WX_MCH_ID, WX_PAY_KEY)
 for wxpay in wxpays:
  response = pay.post(wxpay.get('pay_no'))
  if response and response["return_code"] == "SUCCESS" \
    and response["result_code"] == "SUCCESS":
   trade_state = response["trade_state"]
   if trade_state == "SUCCESS": # 支付成功
    pay_time = response["time_end"]
    transaction_id = response["transaction_id"]
    Wxorder.objects.filter(out_trade_no=out_trade_no).update(
     pay_time=time.strftime("%Y-%m-%d %H:%M:%S",
           time.strptime(pay_time, "%Y%m%d%H%M%S")),
     transaction_id=transaction_id
    )
    return {"success": True, "pay_time": pay_time}
 return {"success": False}

4、alipay.py:

# -*- coding: utf-8 -*-
# pip install 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 ordered_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__":
 alipay = AliPay(
  appid="2016081500252338",
  app_notify_url="http://projectsedus.com/",
  app_private_key_path="keys/private_2048.txt",
  alipay_public_key_path="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://192.168.247.129:8000/"
 )

 url = alipay.direct_pay(
  subject="测试订单",
  out_trade_no="20170202126666",
  total_amount=1000
 )
 re_url = "https://openapi.alipaydev.com/gateway.do?{data}".format(data=url)
 print(re_url)

5、wxpay.py:

# -*- coding=utf-8 -*-

import time
import json
import hashlib
import requests

from pay.utils import (smart_str, dict_to_xml, calculate_sign, random_str,
      post_xml, xml_to_dict, validate_post_xml, format_url)

# from local_settings import appid, mch_id, api_key


OAUTH2_AUTHORIZE_URL = "https://open.weixin.qq.com/connect/oauth2/authorize?%s"
OAUTH2_ACCESS_TOKEN_URL = "https://api.weixin.qq.com/sns/oauth2/access_token?%s"


class WeiXinPay(object):
 def __init__(self, appid, mch_id, api_key):
  self.appid = appid # 微信公众号身份的唯一标识。审核通过后,在微信发送的邮件中查看
  self.mch_id = mch_id # 受理商ID,身份标识
  self.api_key = api_key # 商户支付密钥Key。审核通过后,在微信发送的邮件中查看
  self.common_params = {
   "appid": self.appid,
   "mch_id": self.mch_id,
  }
  self.params = {}
  self.url = ""
  self.trade_type = ""

 def set_params(self, **kwargs):
  self.params = {}
  for (k, v) in kwargs.items():
   self.params[k] = smart_str(v)

  self.params["nonce_str"] = random_str(32)
  if self.trade_type:
   self.params["trade_type"] = self.trade_type
  self.params.update(self.common_params)

 def post_xml(self):
  sign = calculate_sign(self.params, self.api_key)
  xml = dict_to_xml(self.params, sign)
  response = post_xml(self.url, xml)
  return xml_to_dict(response.text)

 def valiate_xml(self, xml):
  return validate_post_xml(xml, self.appid, self.mch_id, self.api_key)

 def get_error_code_desc(self, error_code):
  error_desc = {
   "SYSTEMERROR": u"接口后台错误",
   "INVALID_TRANSACTIONID": u"无效 transaction_id",
   "PARAM_ERROR": u"提交参数错误",
   "ORDERPAID": u"订单已支付",
   "OUT_TRADE_NO_USED": u"商户订单号重复",
   "NOAUTH": u"商户无权限",
   "NOTENOUGH": u"余额丌足",
   "NOTSUPORTCARD": u"不支持卡类型",
   "ORDERCLOSED": u"订单已关闭",
   "BANKERROR": u"银行系统异常",
   "REFUND_FEE_INVALID": u"退款金额大亍支付金额",
   "ORDERNOTEXIST": u"订单不存在",
  }
  return error_desc.get(error_code.strip().upper(), u"未知错误")


class UnifiedOrderPay(WeiXinPay):
 """发送预支付单"""

 def __init__(self, appid, mch_id, api_key):
  super(UnifiedOrderPay, self).__init__(appid, mch_id, api_key)
  self.url = "https://api.mch.weixin.qq.com/pay/unifiedorder"
  self.trade_type = "NATIVE"

 def post(self, body, out_trade_no, total_fee, spbill_create_ip, notify_url, **kwargs):
  tmp_kwargs = {
   "body": body,
   "out_trade_no": out_trade_no,
   "total_fee": total_fee,
   "spbill_create_ip": spbill_create_ip,
   "notify_url": notify_url,
  }
  tmp_kwargs.update(**kwargs)
  self.set_params(**tmp_kwargs)
  return self.post_xml()[1]


class OrderQuery(WeiXinPay):
 """订单状态查询"""

 def __init__(self, appid, mch_id, api_key):
  super(OrderQuery, self).__init__(appid, mch_id, api_key)
  self.url = "https://api.mch.weixin.qq.com/pay/orderquery"

 def post(self, out_trade_no):
  self.set_params(out_trade_no=out_trade_no)
  return self.post_xml()[1]


class JsAPIOrderPay(UnifiedOrderPay):
 """H5页面的Js调用类"""

 def __init__(self, appid, mch_id, api_key, app_secret):
  super(JsAPIOrderPay, self).__init__(appid, mch_id, api_key)
  self.app_secret = app_secret
  self.trade_type = "JSAPI"

 def create_oauth_url_for_code(self, redirect_uri):
  url_params = {
   "appid": self.appid,
   "redirect_uri": redirect_uri, # 一般是回调当前页面
   "response_type": "code",
   "scope": "snsapi_base",
   "state": "STATE#wechat_redirect"
  }
  url = format_url(url_params)
  return OAUTH2_AUTHORIZE_URL % url

 def _create_oauth_url_for_openid(self, code):
  url_params = {
   "appid": self.appid,
   "secret": self.app_secret,
   "code": code,
   "grant_type": "authorization_code",
  }
  url = format_url(url_params)
  return OAUTH2_ACCESS_TOKEN_URL % url

 def _get_oauth_info(self, code):
  """
  获取OAuth2的信息:access_token、expires_in、refresh_token、openid、scope
  返回结果为字典,可使用["xxx"]或.get("xxx", None)的方式进行读取
  """
  url = self._create_oauth_url_for_openid(code)
  response = requests.get(url)
  return response.json() if response else None

 def _get_openid(self, code):
  oauth_info = self._get_oauth_info(code)
  if oauth_info:
   return oauth_info.get("openid", None)
  return None

 def _get_json_js_api_params(self, prepay_id):
  js_params = {
   "appId": self.appid,
   "timeStamp": "%d" % time.time(),
   "nonceStr": random_str(32),
   "package": "prepay_id=%s" % prepay_id,
   "signType": "MD5",
  }
  js_params["paySign"] = calculate_sign(js_params, self.api_key)
  return js_params

 def post(self, body, out_trade_no, total_fee, spbill_create_ip, notify_url, code):
  if code:
   open_id = self._get_openid(code)
   if open_id:
    # 直接调用基类的post方法查询prepay_id,如果成功,返回一个字典
    unified_order = super(JsAPIOrderPay, self).post(body, out_trade_no, total_fee, spbill_create_ip,
                notify_url, open_id=open_id)
    if unified_order:
     prepay_id = unified_order.get("prepay_id", None)
     if prepay_id:
      return self._get_json_js_api_params(prepay_id)
  return None

6、utils.py:

# -*- coding=utf-8 -*-
import hashlib
import re
import types
from random import Random
import requests
import thriftpy

from django.conf import settings
from django.core.exceptions import FieldDoesNotExist
from django.db import models
from django.db.models.fields.reverse_related import ForeignObjectRel
from rest_framework.pagination import PageNumberPagination
from thriftpy.rpc import make_client

from pay.exception_handler import ForeignObjectRelDeleteError, ModelDontHaveIsActiveFiled, logger


def smart_str(s, encoding='utf-8', strings_only=False, errors='strict'):
 """
 Returns a bytestring version of 's', encoded as specified in 'encoding'.
 If strings_only is True, don't convert (some) non-string-like objects.
 """
 if strings_only and isinstance(s, (types.NoneType, int)):
  return s
 if not isinstance(s, str):
  try:
   return str(s)
  except UnicodeEncodeError:
   if isinstance(s, Exception):
    # An Exception subclass containing non-ASCII data that doesn't
    # know how to print itself properly. We shouldn't raise a
    # further exception.
    return ' '.join([smart_str(arg, encoding, strings_only,
           errors) for arg in s])
   return unicode(s).encode(encoding, errors)
 elif s and encoding != 'utf-8':
  return s.decode('utf-8', errors).encode(encoding, errors)
 else:
  return s


def format_url(params, api_key=None):
 url = "&".join(['%s=%s' % (key, smart_str(params[key])) for key in sorted(params)])
 if api_key:
  url = '%s&key=%s' % (url, api_key)
 return url


def calculate_sign(params, api_key):
 # 签名步骤一:按字典序排序参数, 在string后加入KEY
 url = format_url(params, api_key)
 # 签名步骤二:MD5加密, 所有字符转为大写
 return hashlib.md5(url.encode('utf-8')).hexdigest().upper()


def dict_to_xml(params, sign):
 xml = ["<xml>", ]
 for (k, v) in params.items():
  if (v.isdigit()):
   xml.append('<%s>%s</%s>' % (k, v, k))
  else:
   xml.append('<%s><![CDATA[%s]]></%s>' % (k, v, k))
 xml.append('<sign><![CDATA[%s]]></sign></xml>' % sign)
 return ''.join(xml)


def xml_to_dict(xml):
 if xml[0:5].upper() != "<XML>" and xml[-6].upper() != "</XML>":
  return None, None

 result = {}
 sign = None
 content = ''.join(xml[5:-6].strip().split('\n'))

 pattern = re.compile(r"<(?P<key>.+)>(?P<value>.+)</(?P=key)>")
 m = pattern.match(content)
 while (m):
  key = m.group("key").strip()
  value = m.group("value").strip()
  if value != "<![CDATA[]]>":
   pattern_inner = re.compile(r"<!\[CDATA\[(?P<inner_val>.+)\]\]>")
   inner_m = pattern_inner.match(value)
   if inner_m:
    value = inner_m.group("inner_val").strip()
   if key == "sign":
    sign = value
   else:
    result[key] = value

  next_index = m.end("value") + len(key) + 3
  if next_index >= len(content):
   break
  content = content[next_index:]
  m = pattern.match(content)

 return sign, result


def validate_post_xml(xml, appid, mch_id, api_key):
 sign, params = xml_to_dict(xml)
 if (not sign) or (not params):
  return None

 remote_sign = calculate_sign(params, api_key)
 if sign != remote_sign:
  return None

 if params["appid"] != appid or params["mch_id"] != mch_id:
  return None

 return params


def random_str(randomlength=8):
 chars = 'abcdefghijklmnopqrstuvwxyz0123456789'
 random = Random()
 return "".join([chars[random.randint(0, len(chars) - 1)] for i in range(randomlength)])


def post_xml(url, xml):
 return requests.post(url, data=xml.encode('utf-8'), verify=False)


class UnActiveModelMixin(object):
 """
 删除一个对象,并不真删除,级联将对应外键对象的is_active设置为false,需要外键对象都有is_active字段.
 """

 def perform_destroy(self, instance):
  rel_fileds = [f for f in instance._meta.get_fields() if isinstance(f, ForeignObjectRel)]

  links = [f.get_accessor_name() for f in rel_fileds]

  for link in links:
   manager = getattr(instance, link, None)
   if not manager:
    continue
   if isinstance(manager, models.Model):
    if hasattr(manager, 'is_active') and manager.is_active:
     manager.is_active = False
     manager.save()
     raise ForeignObjectRelDeleteError(u'{} 上有关联数据'.format(link))
   else:
    if not manager.count():
     continue
    try:
     manager.model._meta.get_field('is_active')
     manager.filter(is_active=True).update(is_active=False)
    except FieldDoesNotExist as ex:
     # 理论上,级联删除的model上面应该也有is_active字段,否则代码逻辑应该有问题
     logger.warn(ex)
     raise ModelDontHaveIsActiveFiled(
      '{}.{} 没有is_active字段, 请检查程序逻辑'.format(
       manager.model.__module__,
       manager.model.__class__.__name__
      ))
  instance.is_active = False
  instance.save()

 def get_queryset(self):
  return self.queryset.filter(is_active=True)


class StandardResultsSetPagination(PageNumberPagination):
 page_size_query_param = 'size'

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持三水点靠木。

Python 相关文章推荐
Python单链表的简单实现方法
Sep 23 Python
Python 专题五 列表基础知识(二维list排序、获取下标和处理txt文本实例)
Mar 20 Python
Python数据结构与算法之图结构(Graph)实例分析
Sep 05 Python
浅析Python3爬虫登录模拟
Feb 07 Python
一篇文章彻底搞懂Python中可迭代(Iterable)、迭代器(Iterator)与生成器(Generator)的概念
May 13 Python
numpy中的ndarray方法和属性详解
May 27 Python
Python PyQt5 Pycharm 环境搭建及配置详解(图文教程)
Jul 16 Python
Python中的self用法详解
Aug 06 Python
pymysql模块的操作实例
Dec 17 Python
python GUI库图形界面开发之PyQt5状态栏控件QStatusBar详细使用方法实例
Feb 28 Python
如何打包Python Web项目实现免安装一键启动的方法
May 21 Python
python 下载文件的几种方式分享
Apr 07 Python
Python走楼梯问题解决方法示例
Jul 25 #Python
python 批量修改/替换数据的实例
Jul 25 #Python
django 实现电子支付功能的示例代码
Jul 25 #Python
python 去除txt文本中的空格、数字、特定字母等方法
Jul 24 #Python
Python将文本去空格并保存到txt文件中的实例
Jul 24 #Python
python批量修改图片大小的方法
Jul 24 #Python
python 自动去除空行的实例
Jul 24 #Python
You might like
探讨如何把session存入数据库
2013/06/07 PHP
php读取excel文件的简单实例
2013/08/26 PHP
PHP的一个完美GIF等比缩放类,附带去除缩放黑背景
2014/04/01 PHP
PHP按行读取文件时删除换行符的3种方法
2014/05/04 PHP
Linux中为php配置伪静态
2014/12/17 PHP
php计算到指定日期还有多少天的方法
2015/04/14 PHP
PHP调用其他文件中的类
2018/04/02 PHP
Yii框架 session 数据库存储操作方法示例
2019/11/18 PHP
jQuery对象与DOM对象之间的转换方法
2010/04/15 Javascript
jquery.qrcode在线生成二维码使用示例
2013/08/21 Javascript
轻松实现javascript数据双向绑定
2015/11/11 Javascript
EasyUI学习之Combobox级联下拉列表(2)
2016/12/29 Javascript
Vue ElementUI之Form表单验证遇到的问题
2017/08/21 Javascript
vue项目实现github在线预览功能
2018/06/20 Javascript
python数据结构之二叉树的统计与转换实例
2014/04/29 Python
Python3基础之基本数据类型概述
2014/08/13 Python
python win32 简单操作方法
2017/05/25 Python
tensorflow输出权重值和偏差的方法
2018/02/10 Python
python生成密码字典的方法
2018/07/06 Python
一百行python代码将图片转成字符画
2021/02/19 Python
SELENIUM自动化模拟键盘快捷键操作实现解析
2019/10/28 Python
Pytest框架之fixture的详细使用教程
2020/04/07 Python
泰国网上购物:Shopee泰国
2018/09/14 全球购物
Ray-Ban雷朋奥地利官网:全球领先的太阳眼镜品牌
2020/10/12 全球购物
如何获取某个日期是当月的最后一天
2013/12/05 面试题
介绍一下游标
2012/01/10 面试题
师范生自我鉴定范文
2013/10/05 职场文书
英文版网络工程师求职信
2013/10/28 职场文书
护理实习自我鉴定
2013/12/14 职场文书
应届本科生推荐信范文
2013/12/25 职场文书
2014年大学生自我评价
2014/01/19 职场文书
办公室打字员岗位职责
2014/04/16 职场文书
2014年五四青年节演讲稿范文
2014/04/22 职场文书
全国优秀教师事迹材料
2014/08/26 职场文书
毕业设计论文评语
2014/12/31 职场文书
Mysql MVCC机制原理详解
2021/04/20 MySQL