canvas绘制微信头像 显示暂时无法查看，已经配置过downloadFile合法域名，求指导？

点击保存生成canvas图片，

https://wx.qlogo.cn/mmopen/vi_32/DYAIOgq83eo1px0jwJnKwEfVXiciaOpNgUlcAcxokyIpYF1JkMb0lmMJIKRRiaiaibXAlhufwPbiacLiaa9BLe21NsOfw/132

代码如下：直接使用getImageInfo，直接使用downloadFile和两者结合使用均出现下图情况。如果不把头像单独存到服务器中应该怎么处理呢？

uni.downloadFile({                    url: userImg,                    success: (ress) => {                        userImgPath = ress.tempFilePath                        uni.getImageInfo({                            src: userImgPath,                            success: res => {                                console.log('用户头像', res)                                ctx.save();                                _this.roundRect(ctx, 234, 420 * scaleH, 44, 44, 22, '#f7f7f7', '#f7f7f7')                                ctx.drawImage(res.path, 234, 420 * scaleH, 44, 44)                                ctx.restore();                                ctx.draw(true)                            },                            fail: () => {                                _this.canvasFlag = false;                                uni.showToast({                                    title: '头像生成失败',                                    duration: 2000,                                    icon: 'none'                                });                            }                        })                    },                    fail: () => {                    }                })