我已经创建了akka服务器发送文件时，用户后一些json结构到服务器，但我不能打开的文件是由服务器发送
https://imgur.com/a/IZ7JYhV

Akka http服务器（POST方法）=〉http://localhost:5004/download

瓦尔文件=新文件（“源/主/资源/"+路径）

HttpResponse(StatusCodes.OK,entity=HttpEntity.fromFile(ContentTypes.`application/octet-stream`,file = file)).withHeaders(
               scala.collection.immutable.Seq(
                 RawHeader("Content-Disposition",s"attachment; filename=${file.getName}"),
                 RawHeader("Access-Control-Expose-Headers","Content-Disposition"),
                 RawHeader("Access-Control-Allow-Origin","*"),
               )
             )

Javascript/React代码

downloadFile = ()=>{
        const tokenData = {
            token:this.state.token,
            password:this.state.password
        }
       axios.post("http://localhost:5004/download",tokenData).then(res=>{
        var a = document.createElement('a');   
        console.log(res.data)
        var blob = new Blob([res.data], {type:"application/octet-stream"});
        a.href = window.URL.createObjectURL(blob);
        a.download = res.headers["content-disposition"].split("=")[1];
        a.click();
       }).catch(res=>{
           this.setState({
               error:true
           })
       })
    }