【报Bug】uni.downloadFile 当文件名包含= .等特殊字符时，导致下载后无法打开

示例代码：

download:function(e,index){   
                var that=this;  
                //#ifdef H5  
                    // uni.hideLoading()  
                    window.location.href=admin.host+"approvalFormData/downloadFile/"+e  
                //#endif  
                //#ifndef H5   
                uni.showLoading()  
                uni.downloadFile({   
                    url: admin.host+"approvalFormData/downloadFile/"+e,   
                    success: (res) => {  
                        console.log(res)  
                             uni.saveFile({  
                                  tempFilePath: res.tempFilePath,  
                                  success: function (resx) {  
                                        var downlists=that.downlist  
                                        downlists=downlists.filter(function(item){  
                                            return item.id != e   
                                        })  
                                        downlists.push({id:e,filePath:resx.savedFilePath})  
                                        var listarray=that.listarray  
                                        console.log(resx.savedFilePath)  
                                        listarray[index].filePath=resx.savedFilePath;  
                                        listarray[index].zhuantai=true;  
                                        that.listarray = listarray  
                                        uni.setStorage({  
                                            key:'spfj' + that.spid,  
                                            data: downlists,  
                                            success: function () {   
                                                uni.hideLoading()  
                                            }  
                                        });  

                                  },fail(resx) {  
                                    console.log(resx)  
                                  }  
                            });  
                    },  
                    fail:(res) => {  
                        console.log(res)  
                    }  
                });  
                //#endif  

            }

操作步骤：

下载 以该名称命名的图片1612660462400_src=http_a2.att.hudong.com_86_1001300000184180121920108394217.jpg&refer=httpa2.att.hudong.jpg

预期结果：

{
"tempFilePath": "_doc/uniapp_temp_1615252340096/download/1612660462400_src=http_a2.att.hudong.com_86_1001300000184180121920108394217.jpg&refer=httpa2.att.hudong.jpg",
"statusCode": 200,
"errMsg": "downloadFile:ok"
}

实际结果：

错误返回
{
"tempFilePath": "_doc/uniapp_temp_1615252340096/download/1612660462400_src",
"statusCode": 200,
"errMsg": "downloadFile:ok"
}