真机调试给腾讯云对象存储存图片正常 但是预览的就是上传失败 ，真机调试和预览都可以拿到临时密钥 afterRead(event) {       console.log(event)       var cos = new COS({         getAuthorization: function (options, callback) {           wx.request({             url: 'http://192.168.101.26:8000/api/credential/',             data: {               // 可从 options 取需要的参数             },             success: function (result) {               var data = result.data;               var credentials = data.credentials;               callback({                 TmpSecretId: credentials.tmpSecretId,                 TmpSecretKey: credentials.tmpSecretKey,                 XCosSecurityToken: credentials.sessionToken,                 ExpiredTime: data.expiredTime,               });             }           });         }       });       // 上传图片       var that=this       //获取随机文件名       let randowString = Math.random().toString(36).slice(-8) + String(new Date().getTime());       var fileKey = randowString ;       cos.postObject({         Bucket: 'chengxian-1303891317',         Region: 'ap-nanjing',         Key: fileKey+'.jpg',         FilePath: event.detail.file.url,         onProgress: function (info) {         }     }, function (err, data) {       if (err) {         console.log(err)         wx.showToast({           title: '上传失败',           icon: 'none'         });}else{             that.setData({               fileList:that.data.fileList.concat(event.detail.file)           })           that.data.coslist={}           that.data.coslist.cos_path=data.headers.Location           that.data.coslist.cos_name=fileKey+'.jpg'           that.data.imageList.push(that.data.coslist)           console.log(that.data.imageList)         }     });