Two ways to use Python to generate QR codes in WeChat mini programs

This article brings you two ways to use Python to generate QR codes in WeChat mini programs. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

WeChat applet generates QR code:

The language used is python, there are two ways:

1: The backend passes a string to the frontend, and the frontend displays

2: The backend directly generates the picture

1: The backend passes a string to the frontend, and the frontend displays

def get_wxCode(Request, UserInfo):
    try:
        scene = Request["scene"]
        access_token = get_wxCode_token()
        if not access_token:
            return False
        textmod = {"scene": scene, "page": "pages/index/main", "width": 430, "auto_color": True, "is_hyaline": False}
        textmod = json.dumps(textmod).encode(encoding='utf-8')
        header_dict = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; Trident/7.0; rv:11.0) like Gecko',
                       "Content-Type": "application/json"}
        url = 'https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=' + access_token
        req = request.Request(url=url, data=textmod, headers=header_dict)
        res = request.urlopen(req)
        res = res.read()
        b64str = base64.b64encode(res)
        return b64str
    except Exception as e:
        print(e)
        return False

var getWXcode2 = function(hostname){  //获取管理端小程序码

    //动态获取域名，若为本地环境，则默认携带参数为wx-test
    //示例:londex.i-plc.cn
    var hostname1 =  window.location.host;
    hostname1 = hostname1.split('.')[0];
    if(hostname1 == '127' || hostname1 == 'localhost'){
        hostname1 = hostname;
    }
    if(window.localStorage.getItem('wxcode2')){
        $('#wxcodeImg2').attr('src','data:image/png;base64,'+ window.localStorage.getItem('wxcode2'));
        $('#wxCodeModal2').modal('show');
        return;
    }
    var params = {
        "scene":hostname1,
    };
    $.ajax({
        type:'post',
        url:'/request?rname=i_plc.Page.wechat_api.wechat.get_wxCode',
        data:params,
        success:function (res) {
            console.log(res)

            if(res === false){
                $.MessageBox.notify('warn', '获取失败，请稍后再试！');
            }else{
                console.log(res)
                $('#wxcodeImg2').attr('src','data:image/png;base64,'+res);
                $('#wxCodeModal2').modal('show');
                window.localStorage.setItem('wxcode2',res)
            }

        }
    });
};

2: The backend directly generates the picture

def get_wxCode(Request, UserInfo):
    """
        生成小程序二维码
    :param Request:
    :param UserInfo:
    :return:
    """
    result = {"success": False}
    try:
        # scene = Request["scene"]
        access_token = get_wxCode_token()
        if not access_token:
            raise Exception("access_token")
        compid = Request["compid"]
        sql = "select compIndex from company where operationFlag=9 and compID=%s" % compid
        Result = SqlRun(sql)
        if Result["Data"] and Result["Data"][0] and Result["Data"][0][0]:
            scene = Result["Data"][0][0]

            textmod = {"scene": scene, "page": "pages/index/main", "width": 430, "auto_color": True, "is_hyaline": False}
            textmod = json.dumps(textmod).encode(encoding='utf-8')
            header_dict = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; Trident/7.0; rv:11.0) like Gecko',
                           "Content-Type": "application/json"}
            url = 'https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=' + access_token
            req = request.Request(url=url, data=textmod, headers=header_dict)
            res = request.urlopen(req)
            res = res.read()
            b64str = base64.b64encode(res)
            imgdata=base64.b64decode(b64str)

            path = "static/tmpfiles/scan_%s.png" % file_name
            file = open(os.path.join(settings.BASE_DIR, path,), 'wb+')
            file.write(imgdata)
            file.close()

            result["code_url"] = path
            result["success"] = True
    except Exception as e:
        result["error_msg"] = str(e)
    return json.dumps(result)


def get_wxCode_token():
    try:
        textmod = {"grant_type": "client_credential",
            "appid": "wx44a452fb08b0a990",
            "secret": "9aedb0a274027bdd09612fbde3298129"
        }
        textmod = parse.urlencode(textmod)
        header_dict = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; Trident/7.0; rv:11.0) like Gecko'}
        url = 'https://api.weixin.qq.com/cgi-bin/token'
        req = request.Request(url='%s%s%s' % (url, '?', textmod), headers=header_dict)
        res = request.urlopen(req)
        res = res.read().decode(encoding='utf-8')
        res = json.loads(res)
        access_token = res["access_token"]
        return access_token
    except Exception as e:
        print(e)
        return False

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