微信小程序支付接口之Django后台

本文链接：https://blog.csdn.net/qq_41860162/article/details/89098694
Python3-django-微信小程序支付接口调用
工具类生成一系列微信官方文档需要的数据

import hashlib
import datetime
import xml.etree.ElementTree as ET

#商户平台上设置、查询
Mch_id="商户Id"
client_appid="微信小程序APPId"
Mch_key="支付交易秘钥"

# 生成签名的函数
def paysign(appid, body, mch_id, nonce_str, notify_url, openid, out_trade_no, spbill_create_ip, total_fee):
ret = {
"appid": appid,
"body": body,
"mch_id": mch_id,
"nonce_str": nonce_str,
"notify_url": notify_url,
"openid": openid,
"out_trade_no": out_trade_no,
"spbill_create_ip": spbill_create_ip,
"total_fee": total_fee,
"trade_type": 'JSAPI'
}

# 处理函数，对参数按照key=value的格式，并按照参数名ASCII字典序排序
stringA = '&'.join(["{0}={1}".format(k, ret.get(k)) for k in sorted(ret)])
stringSignTemp = '{0}&key={1}'.format(stringA, Mch_key)
sign = hashlib.md5(stringSignTemp.encode("utf-8")).hexdigest()
return sign.upper()


# 生成随机字符串
def getNonceStr():
import random
data = "123456789zxcvbnmasdfghjklqwertyuiopZXCVBNMASDFGHJKLQWERTYUIOP"
nonce_str = ''.join(random.sample(data, 30))
return nonce_str


# 生成商品订单号
def getWxPayOrdrID():
date = datetime.datetime.now()
# 根据当前系统时间来生成商品订单号。时间精确到微秒
payOrdrID = date.strftime("%Y%m%d%H%M%S%f")

return payOrdrID


# 获取全部参数信息，封装成xml
def get_bodyData(openid, client_ip, price):
body = 'Mytest' # 商品描述
notify_url = 'https://127.0.0.1:8000/payOrder/' # 支付成功的回调地址 可访问 不带参数
nonce_str = getNonceStr() # 随机字符串
out_trade_no = getWxPayOrdrID() # 商户订单号
total_fee = str(price) # 订单价格 单位是 分

# 获取签名
sign = paysign(client_appid, body, Mch_id, nonce_str, notify_url, openid, out_trade_no, client_ip, total_fee)

bodyData = '<xml>'
bodyData += '<appid>' + client_appid + '</appid>' # 小程序ID
bodyData += '<body>' + body + '</body>' # 商品描述
bodyData += '<mch_id>' + Mch_id + '</mch_id>' # 商户号
bodyData += '<nonce_str>' + nonce_str + '</nonce_str>' # 随机字符串
bodyData += '<notify_url>' + notify_url + '</notify_url>' # 支付成功的回调地址
bodyData += '<openid>' + openid + '</openid>' # 用户标识
bodyData += '<out_trade_no>' + out_trade_no + '</out_trade_no>' # 商户订单号
bodyData += '<spbill_create_ip>' + client_ip + '</spbill_create_ip>' # 客户端终端IP
bodyData += '<total_fee>' + total_fee + '</total_fee>' # 总金额 单位为分
bodyData += '<trade_type>JSAPI</trade_type>' # 交易类型 小程序取值如下：JSAPI
bodyData += '<sign>' + sign + '</sign>'
bodyData += '</xml>'

return bodyData


def xml_to_dict(xml_data):
'''
xml to dict
:param xml_data:
:return:
'''
xml_dict = {}
root = ET.fromstring(xml_data)
for child in root:
xml_dict[child.tag] = child.text
return xml_dict


def dict_to_xml(dict_data):
'''
dict to xml
:param dict_data:
:return:
'''
xml = ["<xml>"]
for k, v in dict_data.iteritems():
xml.append("<{0}>{1}</{0}>".format(k, v))
xml.append("</xml>")
return "".join(xml)


# 获取返回给小程序的paySign
def get_paysign(prepay_id, timeStamp, nonceStr):
pay_data = {
'appId': client_appid,
'nonceStr': nonceStr,
'package': "prepay_id=" + prepay_id,
'signType': 'MD5',
'timeStamp': timeStamp
}
stringA = '&'.join(["{0}={1}".format(k, pay_data.get(k)) for k in sorted(pay_data)])
stringSignTemp = '{0}&key={1}'.format(stringA, Mch_key)
sign = hashlib.md5(stringSignTemp.encode("utf-8")).hexdigest()
return sign.upper()

后台调用工具类来发起

def getOrder(request)
if request.method == 'POST':
#获取用户
user_id=request.POST.get('userid')
# 获取价格
print(request.get_host())
price = request.POST.get('price')
print(price)

# 获取客户端ip
client_ip, port = request.get_host().split(":")

# 获取小程序openid
cur=connection.cursor()
sql="select openid from users where id=%s" %(user_id)
print(sql)
cur.execute(sql)
openid = cur.fetchall()[0][0]
print(openid)

# 请求微信的url
url = "https://api.mch.weixin.qq.com/pay/unifiedorder"

# 拿到封装好的xml数据
body_data = pay.get_bodyData(openid, client_ip, price)
print()
# 获取时间戳
timeStamp = str(int(time.time()))

# 请求微信接口下单
respone = requests.post(url, body_data.encode("utf-8"), headers={'Content-Type': 'application/xml'})
# 回复数据为xml,将其转为字典
content = pay.xml_to_dict(respone.content)
print(content)

if content["return_code"] == 'SUCCESS':
# 获取预支付交易会话标识
prepay_id = content.get("prepay_id")
# 获取随机字符串
nonceStr = content.get("nonce_str")

# 获取paySign签名，这个需要我们根据拿到的prepay_id和nonceStr进行计算签名
paySign = pay.get_paysign(prepay_id, timeStamp, nonceStr)

# 封装返回给前端的数据
data = {"prepay_id": prepay_id, "nonceStr": nonceStr, "paySign": paySign, "timeStamp": timeStamp}

return ht(dumps(data))

else:
return ht("请求支付失败")
else:
return ht("error")

微信小程序前端请求自己写的pay接口成功后调用wx.requestPayment接口成功发起支付请求

pay:function(){
var self = this
wx.request({
url: app.data.url + '/pay',
data: {
userid: app.data.user.id,
price: 1
//parseInt(self.data.totalprice)*100 // 这里修改价格
},
method: "POST",
header: { 
'Content-Type': 'application/x-www-form-urlencoded'
},
success: function (res) {
console.log(res)
if (true) {
var payModel = res.data;
wx.requestPayment({
'timeStamp': payModel.timeStamp,
'nonceStr': payModel.nonceStr,
'package': "prepay_id=" + payModel.prepay_id,
'signType': 'MD5',
'paySign': payModel.paySign,
'success': function (res) {
console.log("asdsasdasdasd",res)
wx.showToast({
title: '支付成功',
icon: 'success',
duration: 1500,
success: function () {
setTimeout(function () {
wx.switchTab({
url: '/pages/list/list',
})
}, 1500);
}
})
//上传订单
var uplist = []
console.log("lalal", uplist)
console.log("订单信息", self.data.list)
for (var i = 0; i < self.data.list.length; i++) {
uplist.push({
"userid": app.data.user.id,
"goodid": self.data.list[i].id,
"addressid": self.data.address.id,
"number": self.data.list[i].count,
"totalPrice": self.data.list[i].total_price,
"date": self.data.date
})
wx.request({
url: app.data.url + '/shopping/insertRecord',
method: "POST",
header: {
'Content-Type': 'application/x-www-form-urlencoded'
},
data: uplist[i],
success: function () {
console.log('好了一个'); 
} 
})
console.log("上传订单", uplist)
}
},
'fail': function (res) {
}
})
}

},
fail: function () { 
},
complete: function () {

} 
})
}

 

posted @ 2019-12-09 18:46  瘋耔  阅读(734)  评论(0)  编辑  收藏  举报
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