使用blob对H5视频播放进行加密

package com.winxur.controller;

import org.apache.commons.io.IOUtils;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import java.io.*;
import java.net.URLEncoder;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@RequestMapping(value = "redio")
@Controller
public class RedioController {
    /**
     * video 视频流一
     *
     * @param request
     * @param response
     */
    @RequestMapping(value = "/getVido", method = RequestMethod.GET)
    @ResponseBody
    public void getVido(HttpServletRequest request, HttpServletResponse response) {
        String file = "Av706.mp4";
        try {
            FileInputStream inputStream = new FileInputStream(file);
            byte[] data = new byte[inputStream.available()];
            inputStream.read(data);
            String diskfilename = "final.mp4";
            response.setContentType("video/mp4");
            response.setHeader("Content-Disposition", "attachment; filename="" + diskfilename + """);
            System.out.println("data.length " + data.length);
            response.setContentLength(data.length);
            response.setHeader("Content-Range", "" + Integer.valueOf(data.length - 1));
            response.setHeader("Accept-Ranges", "bytes");
            response.setHeader("Etag", "W/"9767057-1323779115364"");
            OutputStream os = response.getOutputStream();

            os.write(data);
            //先声明的流后关掉！
            os.flush();
            os.close();
            inputStream.close();

        } catch (Exception e) {

        }
    }
    /**
     * video 视频流二
     *
     * IOUtils is available in Apache commons io
     */
    @RequestMapping(value = "/preview2", method = RequestMethod.GET)
    @ResponseBody
    public void getPreview2( HttpServletResponse response) {
        try {
            File file = new File("Av706.mp4");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            response.setHeader("Content-Disposition", "attachment; filename="+file.getName().replace(" ", "_"));
            InputStream iStream = new FileInputStream(file);
            IOUtils.copy(iStream, response.getOutputStream());
            response.flushBuffer();
        } catch (java.nio.file.NoSuchFileException e) {
            response.setStatus(HttpStatus.NOT_FOUND.value());
        } catch (Exception e) {
            response.setStatus(HttpStatus.INTERNAL_SERVER_ERROR.value());
        }
    }

    @ResponseBody
    @RequestMapping("/getVideoSrc")
    public OutputStream getVideoSrc(HttpServletRequest httpServletRequest,
                                    HttpServletResponse httpServletResponse){
        //1.创建文件对象
        File f = new File("Av706.mp4");
        //2.获取文件名称
        String fileName = f.getName();
        //3.导出文件
        String agent = httpServletRequest.getHeader("User-Agent").toUpperCase();
        InputStream fis = null;
        OutputStream os = null;
        try {
            //4.获取输入流
            fis = new BufferedInputStream(new FileInputStream(f.getPath()));
            byte[] buffer;
            buffer = new byte[fis.available()];
            fis.read(buffer);
            httpServletResponse.reset();
            //5.由于火狐和其他浏览器显示名称的方式不相同，需要进行不同的编码处理
            if(agent.indexOf("FIREFOX") != -1){//火狐浏览器
                httpServletResponse.addHeader("Content-Disposition", "attachment;filename="+ new String(fileName.getBytes("GB2312"),"ISO-8859-1"));
            }else{//其他浏览器
                httpServletResponse.addHeader("Content-Disposition", "attachment;filename="+ URLEncoder.encode(fileName, "UTF-8"));
            }
            //6.设置response编码
            httpServletResponse.setCharacterEncoding("UTF-8");
            httpServletResponse.addHeader("Content-Length", "" + f.length());
            //设置输出文件类型
            httpServletResponse.setContentType("video/mpeg4");
            //7.获取response输出流
            os = httpServletResponse.getOutputStream();
            os.flush();
            //8.输出文件
            os.write(buffer);
        }catch(Exception e){
            System.out.println(e.getMessage());
        } finally{
            //关闭流
            try {
                if(fis != null){ fis.close(); }

                if(os != null){ os.flush(); }

                if(os != null){os.close(); }
                return null;
            } catch (IOException e) {
                System.out.println(e.getMessage());
            }
        }

        return os;
    }
    //跳转html
    @RequestMapping(value ="/hello")
    public String index() {
        return "hello";
    }
}

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <title>Insert title here</title>
</head>
<!--JQuery在线引用-->
<script src="https://ajax.aspnetcdn.com/ajax/jquery/jquery-3.5.1.min.js"></script>

<body>
<video id="sound" type="video/mp4" controls="controls" autoplay="autoplay"
       webkit-playsinline="true"    playsinline="true"   heigth="100%"></video>


<script>
    //创建XMLHttpRequest对象
    var xhr = new XMLHttpRequest();
    //配置请求方式、请求地址以及是否同步
    xhr.open('POST', '/redio/getVideoSrc', true);
    //设置请求结果类型为blob
    xhr.responseType = 'blob';
    //请求成功回调函数
    xhr.onload = function(e) {
        if (this.status == 200) {//请求成功
            //获取blob对象
            var blob = this.response;
            //获取blob对象地址，并把值赋给容器
            $("#sound").attr("src", URL.createObjectURL(blob));
        }
    };
    xhr.send();
</script>
</body>
</html>