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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 = ""                 "" + appid + ""                 "" + body + ""                 "" + mch_id + ""                 "" + nonceStr + ""                 "" + notifyurl + ""                 "" + openid + ""                 "" + out_trade_no + ""                 "" + serverIP + ""                 "" + fee + ""                 "JSAPI"                 "" + paysign + " "

        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‘})

 

原文:https://www.cnblogs.com/peterWXM/p/12910926.html

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