微信小程序中用Python生成二维码的两种方式

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微信小程序生成二维码：

所用语言python，有两种方式：

1： 后端传一段字符串给前端， 前端显示

2： 后端直接生成图片

1： 后端传一段字符串给前端， 前端显示

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： 后端直接生成图片

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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