反应js下载文件网址

Question

有

我对网络编程很陌生，目前正在开发一个需要从服务器下载文件的项目。我有以下代码但它运行不正常。它发送的http请求不是我期望的那个...详细信息在代码中注释。感谢

onDownload() {
    const Files = this.props.files;
    const file = Files.findOne({ name: this.props.selectedFile.name });
    const filePath = file.fileSpec; //file path is like /test.txt

    var tempLink = document.createElement('a');


    // would like to send some http request like:"/user/test.txt"
    //to the server. But it sent some strange string...
    // I feel like I need to convert the format here but not sure how
    tempLink.href = '/user' + filePath; 

    tempLink.setAttribute('download', file);
    tempLink.setAttribute('target', '_blank');
    document.body.appendChild(tempLink);
    tempLink.click();
    document.body.removeChild(tempLink);
}