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# -*- coding: utf-8 -*- |
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from __future__ import absolute_import, unicode_literals |
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import inspect |
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import logging |
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import requests |
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import xmltodict |
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from xml.parsers.expat import ExpatError |
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from optionaldict import optionaldict |
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from wechatpy.crypto import WeChatRefundCrypto |
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from wechatpy.utils import random_string |
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from wechatpy.exceptions import WeChatPayException, InvalidSignatureException |
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from wechatpy.pay.utils import ( |
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calculate_signature, calculate_signature_hmac, _check_signature, dict_to_xml |
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) |
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from wechatpy.pay.base import BaseWeChatPayAPI |
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from wechatpy.pay import api |
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logger = logging.getLogger(__name__) |
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def _is_api_endpoint(obj): |
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return isinstance(obj, BaseWeChatPayAPI) |
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class WeChatPay(object): |
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""" |
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微信支付接口 |
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:param appid: 微信公众号 appid |
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:param sub_appid: 当前调起支付的小程序APPID |
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:param api_key: 商户 key,不要在这里使用小程序的密钥 |
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:param mch_id: 商户号 |
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:param sub_mch_id: 可选，子商户号，受理模式下必填 |
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:param mch_cert: 必填，商户证书路径 |
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:param mch_key: 必填，商户证书私钥路径 |
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:param timeout: 可选，请求超时时间，单位秒，默认无超时设置 |
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:param sandbox: 可选，是否使用测试环境，默认为 False |
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""" |
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redpack = api.WeChatRedpack() |
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"""红包接口""" |
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transfer = api.WeChatTransfer() |
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"""企业付款接口""" |
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coupon = api.WeChatCoupon() |
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"""代金券接口""" |
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order = api.WeChatOrder() |
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"""订单接口""" |
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refund = api.WeChatRefund() |
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"""退款接口""" |
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micropay = api.WeChatMicroPay() |
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"""刷卡支付接口""" |
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tools = api.WeChatTools() |
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"""工具类接口""" |
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jsapi = api.WeChatJSAPI() |
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"""公众号网页 JS 支付接口""" |
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withhold = api.WeChatWithhold() |
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"""代扣接口""" |
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API_BASE_URL = 'https://api.mch.weixin.qq.com/' |
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def __new__(cls, *args, **kwargs): |
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self = super(WeChatPay, cls).__new__(cls) |
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api_endpoints = inspect.getmembers(self, _is_api_endpoint) |
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for name, _api in api_endpoints: |
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api_cls = type(_api) |
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_api = api_cls(self) |
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setattr(self, name, _api) |
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return self |
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def __init__(self, appid, api_key, mch_id, sub_mch_id=None, |
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mch_cert=None, mch_key=None, timeout=None, sandbox=False, sub_appid=None): |
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self.appid = appid |
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self.sub_appid = sub_appid |
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self.api_key = api_key |
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self.mch_id = mch_id |
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self.sub_mch_id = sub_mch_id |
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self.mch_cert = mch_cert |
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self.mch_key = mch_key |
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self.timeout = timeout |
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self.sandbox = sandbox |
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self._sandbox_api_key = None |
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self._http = requests.Session() |
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def _fetch_sandbox_api_key(self): |
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nonce_str = random_string(32) |
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sign = calculate_signature({'mch_id': self.mch_id, 'nonce_str': nonce_str}, self.api_key) |
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payload = dict_to_xml({ |
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'mch_id': self.mch_id, |
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'nonce_str': nonce_str, |
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}, sign=sign) |
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headers = {'Content-Type': 'text/xml'} |
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api_url = '{base}sandboxnew/pay/getsignkey'.format(base=self.API_BASE_URL) |
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response = self._http.post(api_url, data=payload, headers=headers) |
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return xmltodict.parse(response.text)['xml'].get('sandbox_signkey') |
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def _request(self, method, url_or_endpoint, **kwargs): |
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if not url_or_endpoint.startswith(('http://', 'https://')): |
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api_base_url = kwargs.pop('api_base_url', self.API_BASE_URL) |
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if self.sandbox: |
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api_base_url = '{url}sandboxnew/'.format(url=api_base_url) |
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url = '{base}{endpoint}'.format( |
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base=api_base_url, |
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endpoint=url_or_endpoint |
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) |
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else: |
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url = url_or_endpoint |
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if isinstance(kwargs.get('data', ''), dict): |
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data = kwargs['data'] |
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if 'mchid' not in data: |
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# Fuck Tencent |
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data.setdefault('mch_id', self.mch_id) |
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data.setdefault('sub_mch_id', self.sub_mch_id) |
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data.setdefault('nonce_str', random_string(32)) |
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data = optionaldict(data) |
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if data.get('sign_type', 'MD5') == 'HMAC-SHA256': |
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sign = calculate_signature_hmac(data, self.sandbox_api_key if self.sandbox else self.api_key) |
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else: |
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sign = calculate_signature(data, self.sandbox_api_key if self.sandbox else self.api_key) |
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body = dict_to_xml(data, sign) |
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body = body.encode('utf-8') |
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kwargs['data'] = body |
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# 商户证书 |
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if self.mch_cert and self.mch_key: |
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kwargs['cert'] = (self.mch_cert, self.mch_key) |
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kwargs['timeout'] = kwargs.get('timeout', self.timeout) |
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logger.debug('Request to WeChat API: %s %s\n%s', method, url, kwargs) |
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res = self._http.request( |
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method=method, |
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url=url, |
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**kwargs |
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) |
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try: |
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res.raise_for_status() |
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except requests.RequestException as reqe: |
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raise WeChatPayException( |
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return_code=None, |
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client=self, |
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request=reqe.request, |
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response=reqe.response |
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) |
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return self._handle_result(res) |
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def _handle_result(self, res): |
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res.encoding = 'utf-8' |
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xml = res.text |
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logger.debug('Response from WeChat API \n %s', xml) |
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try: |
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data = xmltodict.parse(xml)['xml'] |
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except (xmltodict.ParsingInterrupted, ExpatError): |
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# 解析 XML 失败 |
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logger.debug('WeChat payment result xml parsing error', exc_info=True) |
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return xml |
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return_code = data['return_code'] |
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return_msg = data.get('return_msg') |
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result_code = data.get('result_code') |
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errcode = data.get('err_code') |
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errmsg = data.get('err_code_des') |
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if return_code != 'SUCCESS' or result_code != 'SUCCESS': |
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# 返回状态码不为成功 |
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raise WeChatPayException( |
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return_code, |
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result_code, |
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return_msg, |
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errcode, |
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errmsg, |
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client=self, |
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request=res.request, |
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response=res |
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) |
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return data |
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def get(self, url, **kwargs): |
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return self._request( |
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method='get', |
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url_or_endpoint=url, |
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**kwargs |
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) |
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def post(self, url, **kwargs): |
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return self._request( |
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method='post', |
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url_or_endpoint=url, |
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**kwargs |
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) |
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def check_signature(self, params): |
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return _check_signature(params, self.api_key if not self.sandbox else self.sandbox_api_key) |
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@classmethod |
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def get_payment_data(cls, xml): |
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""" |
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解析微信支付结果通知，获得appid, mch_id, out_trade_no, transaction_id |
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如果你需要进一步判断，请先用appid, mch_id来生成WeChatPay, |
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然后用`wechatpay.parse_payment_result(xml)`来校验支付结果 |
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使用示例:: |
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from wechatpy.pay import WeChatPay |
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# 假设你已经获取了微信服务器推送的请求中的xml数据并存入xml变量 |
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data = WeChatPay.get_payment_appid(xml) |
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{ |
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"appid": "公众号或者小程序的id", |
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"mch_id": "商户id", |
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} |
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""" |
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try: |
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data = xmltodict.parse(xml) |
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except (xmltodict.ParsingInterrupted, ExpatError): |
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raise ValueError("invalid xml") |
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if not data or 'xml' not in data: |
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raise ValueError("invalid xml") |
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return { |
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"appid": data["appid"], |
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"mch_id": data["mch_id"], |
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"out_trade_no": data["out_trade_no"], |
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"transaction_id": data["transaction_id"], |
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} |
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def parse_payment_result(self, xml): |
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"""解析微信支付结果通知""" |
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try: |
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data = xmltodict.parse(xml) |
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except (xmltodict.ParsingInterrupted, ExpatError): |
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raise InvalidSignatureException() |
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if not data or 'xml' not in data: |
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raise InvalidSignatureException() |
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data = data['xml'] |
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sign = data.pop('sign', None) |
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real_sign = calculate_signature(data, self.api_key if not self.sandbox else self.sandbox_api_key) |
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if sign != real_sign: |
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raise InvalidSignatureException() |
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for key in ('total_fee', 'settlement_total_fee', 'cash_fee', 'coupon_fee', 'coupon_count'): |
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if key in data: |
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data[key] = int(data[key]) |
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data['sign'] = sign |
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return data |
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def parse_refund_notify_result(self, xml): |
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"""解析微信退款结果通知""" |
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refund_crypto = WeChatRefundCrypto(self.api_key if not self.sandbox else self.sandbox_api_key) |
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data = refund_crypto.decrypt_message(xml, self.appid, self.mch_id) |
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for key in ('total_fee', 'settlement_total_fee', 'refund_fee', 'settlement_refund_fee'): |
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if key in data: |
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data[key] = int(data[key]) |
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return data |
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@property |
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def sandbox_api_key(self): |
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if self.sandbox and self._sandbox_api_key is None: |
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self._sandbox_api_key = self._fetch_sandbox_api_key() |
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return self._sandbox_api_key |
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jxtech /
wechatpy
