微信小程序之微信支付（Django）
小程序端：
wx.login({ success: function (res) { var code = '' code = res.code wx.request({ url: 'https://xxxx', method: 'POST', data: { appid: 'xxxxx', secret: 'xxxxx', code: code, grant_type: 'authorization_code' }, header: { "Content-Type": "application/x-www-form-urlencoded" }, success: function (res) { console.log(res) wx.requestPayment({ timeStamp: res.data["timestamp"], nonceStr: res.data["nonceStr"], package: res.data["package"], signType: 'MD5', paySign: res.data["paysign"], success: function (res) { console.log("success:"+res) }, fail:function(res){ console.log(res) } }) } }) } })
服务端：
def wxpay(request):
"""
通过小程序前端 wx.login() 接口获取临时登录凭证 code
将 code 作为参数传入，调用 get_user_info() 方法获取 openid
"""
code = request.POST.get("code", None)
data = get_user_info(code)
openid = data['openid']
res_json = pay.payment(openid, "", "", "")
return HttpResponse(res_json)
def get_user_info(js_code):
"""
使用 临时登录凭证code 获取 session_key 和 openid 等
支付部分仅需 openid，如需其他用户信息请按微信官方开发文档自行解密
"""
print("js_code:",js_code)
req_params = {
'appid': settings.WECHAT['APPID'],
'secret': settings.WECHAT['APPSECRET'],
'js_code': js_code,
'grant_type': 'authorization_code',
}
user_info = requests.get('https://api.weixin.qq.com/sns/jscode2session',
params=req_params, timeout=3, verify=False)
return user_info.json()
def random_str(randomlength=32): #随机字符串生成算法
str = ''
chars = 'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz0123456789'
length = len(chars) - 1
random = Random()
for i in range(randomlength):
str+=chars[random.randint(0, length)]
return str
def payment(openid,goodsid,goodsnum,totalpay): #统一下单
try:
openid = openid
appid = 'xxxx' # 公众号id
body = 'test' # 商品名
check_fee = '1'
mch_id = 'xxx' # 商户号
nonceStr = random_str(32) # 随机串
notifyurl = 'https://xxxx' # 支付回调链接
out_trade_no = '099909090' # 订单号
fee = str(check_fee) # 总价
serverIP = 'xxxx' # 服务器地址
mch_key = 'xxxxx' # 支付密钥
all_pay_url = 'https://api.mch.weixin.qq.com/pay/unifiedorder' # 统一下单api地址
s = "appid=" + appid + "&body=test&mch_id=" + mch_id + "&nonce_str=" + nonceStr + "¬ify_url=" + notifyurl + "&openid=" + openid + "&out_trade_no=" + out_trade_no + "&spbill_create_ip=" + serverIP + "&total_fee=" + fee + "&trade_type=JSAPI&key=" + mch_key
paysign = hashlib.md5(s.encode('UTF-8')).hexdigest().upper()
pay_xml = "<xml>" \
"<appid>" + appid + "</appid>" \
"<body>" + body + "</body>" \
"<mch_id>" + mch_id + "</mch_id>" \
"<nonce_str>" + nonceStr + "</nonce_str>" \
"<notify_url>" + notifyurl + "</notify_url>" \
"<openid>" + openid + "</openid>" \
"<out_trade_no>" + out_trade_no + "</out_trade_no>" \
"<spbill_create_ip>" + serverIP + "</spbill_create_ip>" \
"<total_fee>" + fee + "</total_fee>" \
"<trade_type>JSAPI</trade_type>" \
"<sign>" + paysign + "</sign></xml> "
headers = {'Content-Type': 'text/xml'}
# 访问支付接口
# print(pay_xml)
r = requests.post(all_pay_url, data=pay_xml.encode('utf-8'),
headers=headers)
r.encoding = "utf-8"
# print(r.text)
xml_recv = ET.fromstring(r.text)
wxre_sign = xml_recv.find('sign').text # 用来校验签名认证
prepay_id = xml_recv.find('prepay_id').text
package = "prepay_id=" + prepay_id
ctime = str(int(time.time()))
stringB = "appId=" + appid + "&nonceStr=" + nonceStr + "&package=" + package + "&signType=MD5&timeStamp=" + ctime
stringBSignTemp = stringB + "&key="+mch_key # 二次签名
paysign = hashlib.md5(stringBSignTemp.encode('utf-8')).hexdigest().upper()
res_json = json.dumps({'rcode': 200, 'package': package, 'paysign': paysign, 'timestamp': ctime,
'nonceStr': nonceStr, 'appId': appid})
print(res_json)
return res_json
except Exception as err:
print(str(err) + '下单异常')
return json.dumps({'rcode': 400, 'msg': '下单异常'})
