背景

linux未部署文件服务器，通过springboot提交对外的地址，将linux的文件转视频流

代码

  • 配置类
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/**
 * 文件流转视频流
 */
@Component
public class NonStaticResourceHttpRequestHandler extends ResourceHttpRequestHandler {
    public final static String ATTR_FILE = "NON-STATIC-FILE";

    @Override
    protected Resource getResource(HttpServletRequest request) {
        final Path filePath = (Path) request.getAttribute(ATTR_FILE);
        return new FileSystemResource(filePath);
    }
}
  • 业务实现类
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private static final String UTF8 = "UTF-8";
@GetMapping("/download/{name}")
public void downLoadFile(@PathVariable("name") String name, HttpServletRequest request, HttpServletResponse response) throws IOException {
    //在服务器上的地址
    String rootUrl = "/root/prod/file/";
    File file = new File(rootUrl+name);
    response.setCharacterEncoding(UTF8);
    InputStream is = null;
    OutputStream os = null;
    try {
        // 分片下载 Range表示方式 bytes=100-1000  100-
        long fSize = file.length();
        response.setContentType("application/x-download");
        String fileName = URLEncoder.encode(file.getName(), UTF8);
        response.addHeader("Content-Disposition", "attachment;filename=" + fileName);
        // 支持分片下载
        response.setHeader("Accept-Range", "bytes");
        response.setHeader("fSize", String.valueOf(fSize));
        response.setHeader("fName", fileName);

        long pos = 0, last = fSize - 1, sum = 0;
        if (null != request.getHeader("Range")) {
            response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT);
            String numberRange = request.getHeader("Range").replaceAll("bytes=", "");
            String[] strRange = numberRange.split("-");
            if (strRange.length == 2) {
                pos = Long.parseLong(strRange[0].trim());
                last = Long.parseLong(strRange[1].trim());
                if (last > fSize-1) {
                    last = fSize - 1;
                }
            } else {
                pos = Long.parseLong(numberRange.replaceAll("-", "").trim());
            }
        }
        long rangeLength = last - pos + 1;
        String contentRange = new StringBuffer("bytes").append(pos).append("-").append(last).append("/").append(fSize).toString();
        response.setHeader("Content-Range", contentRange);
        response.setHeader("Content-Length", String.valueOf(rangeLength));

        os = new BufferedOutputStream(response.getOutputStream());
        is = new BufferedInputStream(new FileInputStream(file));
        is.skip(pos);
        byte[] buffer = new byte[1024];
        int length = 0;
        while (sum < rangeLength) {
            int readLength = (int) (rangeLength - sum);
            length = is.read(buffer, 0, (rangeLength - sum) <= buffer.length ? readLength : buffer.length);
            sum += length;
            os.write(buffer,0, length);
        }
        System.out.println("下载完成");
    }finally {
        if (is != null){
            is.close();
        }
        if (os != null){
            os.close();
        }
    }
}

注：请求Springboot的接口就可直接访问视频流