微信支付开发文档：
总的来说，微信支付很简单，看文档肯定是没有问题的。
settings.py 文件中的一些配置：
import os
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
# 微信支付相关
WXPAY_APPID = '微信分配的公众账号ID'
WXPAY_MCHID = '商户号'
WXPAY_APIKEY = '商户平台设置的密钥KEY'
# 服务器存放证书路径（微信支付签发的）
WXPAY_CLIENT_CERT_PATH = os.path.join(BASE_DIR, 'key', WXPAY_APPID, 'apiclient_cert.pem')
WXPAY_CLIENT_KEY_PATH = os.path.join(BASE_DIR, 'key', WXPAY_APPID, 'apiclient_key.pem')
自己封装的工具文件 weixin_pay.py：
# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from django.conf import settings
from random import Random
import hashlib
import requests
import re
def get_client_ip(request):
"""
获取请求IP
:param request:
:return:
"""
ip = ''
try:
x_forwarded_for = request.META.get('HTTP_X_FORWARDED_FOR')
if x_forwarded_for:
ip = x_forwarded_for.split(',')[0]
else:
ip = request.META.get('REMOTE_ADDR')
except:
pass
return ip
def format_url(params, api_key=None):
"""
字典序排序
:param params:
:param api_key:
:return:
"""
url = "&".join(['%s=%s' % (key, 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):
"""
计算签名
:param params:
:param api_key:
:return:
"""
# 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 random_str():
"""
生成32位随机字符串
:return:
"""
chars = 'abcdefghijklmnopqrstuvwxyz0123456789'
random = Random()
return "".join([chars[random.randint(0, len(chars) - 1)] for i in range(32)])
def dict_to_xml(params):
xml = ["<xml>", ]
for k, v in params.items():
xml.append('<%s>%s</%s>' % (k, v, k))
xml.append('</xml>')
return ''.join(xml)
def dict_to_xml2(params):
xml = ["<xml>", ]
for k, v in params.items():
xml.append('<%s><![CDATA[%s]]></%s>' % (k, v, k))
xml.append('</xml>')
return ''.join(xml)
def xml_to_dict(xml):
xml = xml.strip()
if xml[: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
class WeiXinPay(object):
def __init__(self, mch_appid, mchid, api_key):
self.api_key = api_key
self.url = "https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers"
self.params = {
"mch_appid": mch_appid,
"mchid": mchid
}
def update_params(self, kwargs):
self.params["desc"] = "付款描述信息"
self.params["check_name"] = "NO_CHECK"
self.params.update(kwargs)
def post_xml(self):
sign = calculate_sign(self.params, self.api_key)
self.params["sign"] = sign
xml = dict_to_xml(self.params)
# 要特别注意的是需要带证书（微信支付签发的）
response = requests.post(self.url, data=xml.encode('utf-8'), cert=(settings.WXPAY_CLIENT_CERT_PATH, settings.WXPAY_CLIENT_KEY_PATH))
return xml_to_dict(response.text)
def post_xml2(self):
sign = calculate_sign(self.params, self.api_key)
self.params["sign"] = sign
xml = dict_to_xml2(self.params)
# 要特别注意的是需要带证书（微信支付签发的）
response = requests.post(self.url, data=xml.encode('utf-8'), cert=(settings.WXPAY_CLIENT_CERT_PATH, settings.WXPAY_CLIENT_KEY_PATH))
return xml_to_dict(response.text)
class Pay(WeiXinPay):
def __init__(self, mch_appid, mchid, api_key):
super(Pay, self).__init__(mch_appid, mchid, api_key)
def post(self, openid, trade_no, amount, ip, name, nonce_str):
kwargs = {
"openid": openid,
"partner_trade_no": trade_no,
"amount": amount,
"spbill_create_ip": ip,
"re_user_name": name,
"nonce_str": nonce_str
}
self.update_params(kwargs)
return self.post_xml()[1]
class PayQuery(WeiXinPay):
"""
查询企业付款
"""
def __init__(self, mch_appid, mchid, api_key):
super(PayQuery, self).__init__(mch_appid, mchid, api_key)
self.url = "https://api.mch.weixin.qq.com/mmpaymkttransfers/gettransferinfo"
def post(self, trade_no, nonce_str):
kwargs = {
"partner_trade_no": trade_no,
"nonce_str": nonce_str
}
self.update_params(kwargs)
return self.post_xml2()[1]
接下来就是简单的使用了：
openid = '用户openid'
trade_no = '随机生成的商户订单号'
amount = '企业付款金额，单位为分'
ip = 'Ip地址'
name = '收款用户姓名'
nonce_str = '随机字符串'
pay = Pay(settings.WXPAY_APPID, settings.WXPAY_MCHID, settings.WXPAY_APIKEY)
response = pay.post(openid, trade_no, amount * 100, ip, name, nonce_str)
if response and response["return_code"] == "SUCCESS":
if response["result_code"] == "SUCCESS":
print '付款成功'
一些细节问题还需要根据自己的业务需求进行相应的调整。
