vue post 下载文件

downloadFile(file){
    // let url = baseURL + API.test.download + "/" + file.path;
    // const link = document.createElement('a')
    // link.href = url;
    // link.download = file.name; // 重命名文件
    // link.target="_blank"
    // link.click();


    this.$fetch.post(API.test.download + "/" + file.path,{}, {responseType: 'blob'}).then(response => {
        let res = response.data;
        if (res!=null) {
            let blob = new Blob([res], { type: 'application/octet-stream' });
            var reader = new FileReader();
            reader.readAsBinaryString(blob);
            reader.onloadend = () => {
                // this.serverLog = reader.result;
                this.$message.success(file.name + " download success");
            }
            let url = window.URL.createObjectURL(blob);
            const link = document.createElement('a'); // 创建a标签
            link.href = url;
            link.download = file.name; // 重命名文件
            link.click();
            URL.revokeObjectURL(url); // 释放内存
        }

    });
},