转载请注明原文地址：http://www.cnblogs.com/ygj0930/p/7686765.html
一：资料阅读
场景介绍：https://pay.weixin.qq.com/wiki/doc/api/micropay.php?chapter=5_1
支付流程：https://pay.weixin.qq.com/wiki/doc/api/micropay.php?chapter=5_4
提交刷卡支付：https://pay.weixin.qq.com/wiki/doc/api/micropay.php?chapter=9_10&index=1
查询订单支付结果：https://pay.weixin.qq.com/wiki/doc/api/micropay.php?chapter=9_2
二：配置信息准备
# ========支付相关配置信息===========
_APP_ID = ""; # 公众账号appid
_MCH_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
_host_name = socket.gethostname()
_ip_address = socket.gethostbyname(_host_name)
_CREATE_IP = _ip_address; # 发起支付ip # 有关url
_MICROPAY_URL = "https://api.mch.weixin.qq.com/pay/micropay"; #刷卡支付api
_QUERY_URL = "https://api.mch.weixin.qq.com/pay/orderquery"; #查询订单支付结果api
三：编写刷卡支付工具类
1:辅助函数
def get_sign_for_wx(self, para, key):
'''
根据算法, 生成微信支付签名
:param cr:
:param uid:
:param para:
:param context:
:return:
'''
keylist = list(para.keys())
keylist.sort()
s = ''
for i in range(len(keylist)):
s += str(keylist[i]) + '=' + str(para[keylist[i]])
if i != len(keylist) - 1:
s += '&'
s += '&key=' + key
signmd5 = hashlib.md5()
signmd5.update(s)
sign = (signmd5.hexdigest()).upper()
return sign #拼接xml字符串
def get_xml_data(self, doc, para):
root = doc.createElement('xml')
doc.appendChild(root)
for key, value in sorted(para.items()):
new_node = doc.createElement(key)
node_value = doc.createTextNode(str(value))
new_node.appendChild(node_value)
root.appendChild(new_node)
return doc
2:提交刷卡支付
def do_micropay(self,orderid,goodsName,goodsPrice,authCode,**kwargs):
'''
刷卡支付
'''
appid = self._APP_ID
mch_id = self._MCH_ID
key = self._API_KEY
nonce_str = str(int(round(time.time() * 1000))) + str(random.randint(1, 999)) + string.join(random.sample(
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u',
'v', 'w', 'x', 'y', 'z'], 5)).replace(" ", "")
spbill_create_ip = self._CREATE_IP params = {}
params['appid'] = appid
params['mch_id'] = mch_id
params['nonce_str'] = nonce_str
params['out_trade_no'] = orderid.encode('utf-8') # 客户端生成并传过来，参数必须用utf8编码，否则报错
params['total_fee'] = goodsPrice # 单位是分，必须是整数
params['spbill_create_ip'] = spbill_create_ip
params['body'] = goodsName.encode('utf-8') # 中文必须用utf-8编码，否则xml格式错误
params['auth_code'] = authCode doc = dom.Document()
self.get_xml_data(doc, params)
sign = self.get_sign_for_wx(params, self._API_KEY)
params['sign'] = sign
signnode = doc.createElement('sign')
signvalue = doc.createTextNode(sign)
signnode.appendChild(signvalue)
doc.getElementsByTagName('xml')[0].appendChild(signnode) # 向微信刷卡支付发出请求
req = urllib2.Request(self._MICROPAY_URL)
req.headers['Content-Type'] = 'text/xml'
req.data = doc.toprettyxml()
res_data = urllib2.urlopen(req) # 提取支付结果
res_read = res_data.read()
doc = xmltodict.parse(res_read)
return_code = doc['xml']['return_code'] # 结果分析
# 此字段是通信标识，非交易标识，交易是否成功需要查看result_code来判断
if return_code == 'SUCCESS':
result_code = doc['xml']['result_code']
# 业务结果
if result_code == 'SUCCESS':
buyer = doc['xml']['openid'] #支付者id
return (True, 'SUCCESS', u'支付成功 ',buyer)
elif result_code == 'FAIL':
error_code = doc['xml']['err_code']
error_code_des = doc['xml']['err_code_des']
return (False, error_code, error_code_des,'')
else:
return_msg = doc['xml']['return_msg']
return (False, return_code, return_msg,'')
3:根据订单号查询支付结果
def do_micropay_query(self,orderid):
appid = self._APP_ID
mch_id = self._MCH_ID
key = self._API_KEY
out_trade_no = orderid.encode('utf-8') # 客户端生成并传过来，参数必须用utf8编码，否则报错
nonce_str = str(int(round(time.time() * 1000))) + str(random.randint(1, 999)) + string.join(random.sample(
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u',
'v', 'w', 'x', 'y', 'z'], 5)).replace(" ", "") params = {}
params['appid'] = appid
params['mch_id'] = mch_id
params['nonce_str'] = nonce_str
params['out_trade_no'] = out_trade_no doc = dom.Document()
self.get_xml_data(doc, params)
sign = self.get_sign_for_wx(params, self._API_KEY)
params['sign'] = sign
signnode = doc.createElement('sign')
signvalue = doc.createTextNode(sign)
signnode.appendChild(signvalue)
doc.getElementsByTagName('xml')[0].appendChild(signnode) # 发出查询请求
req = urllib2.Request(self._QUERY_URL)
req.headers['Content-Type'] = 'text/xml'
req.data = doc.toprettyxml()
res_data = urllib2.urlopen(req) # 返回查询结果
res_read = res_data.read()
doc = xmltodict.parse(res_read)
return_code = doc['xml']['return_code'] if return_code == 'SUCCESS':
result_code = doc['xml']['result_code']
# 业务结果
if result_code == 'SUCCESS':
trade_state = doc['xml']['trade_state']
#支付成功
if trade_state == 'SUCCESS':
buyer = doc['xml']['openid']
return (True, 'SUCCESS', u'支付成功 ',buyer)
#未支付、支付中
elif trade_state == 'NOTPAY':
return (False, 'NOTPAY', u'未支付','')
elif trade_state == 'USERPAYING':
return (False, 'USERPAYING', u'支付中','')
#支付关闭、撤销、失败
elif trade_state == 'CLOSED':
return (False, 'CLOSED', u'支付关闭','')
elif trade_state == 'REVOKED':
return (False, 'REVOKED', u'支付撤销','')
elif trade_state == 'PAYERROR':
return (False, 'PAYERROR', u'支付失败','')
else:
error_code = doc['xml']['err_code']
error_code_des = doc['xml']['err_code_des']
return (False, error_code, error_code_des,'')
else:
return_msg = doc['xml']['return_msg']
return (False, return_code, return_msg,'')