使用HDFS文件系统在线浏览视频音频

使用HDFS文件系统在线浏览视频音频

JAVA API 读取hdfs系统文件
支持音频与视频

public void preview(String fpath, HttpServletRequest req, HttpServletResponse resp) throws IOException {

if (fpath == null)
    return;
String filename = HADOOP_URL + fpath;
Configuration config = new Configuration();
FileSystem fs = null;
FSDataInputStream in = null;
try {
    fs = FileSystem.get(URI.create(filename), config);
    in = fs.open(new Path(filename));
} catch (IOException e) {
    e.printStackTrace();
}
final long fileLen = fs.getFileStatus(new Path(filename)).getLen();
String range = req.getHeader("Range");
resp.setHeader("Content-type", "video/mp3");
OutputStream out = resp.getOutputStream();
if (range == null) {
    filename = fpath.substring(fpath.lastIndexOf("/") + 1);
    resp.setHeader("Content-Disposition", "attachment; filename=" + filename);
    resp.setContentType("application/octet-stream");
    resp.setContentLength((int) fileLen);
    IOUtils.copyBytes(in, out, fileLen, false);
} else {
    long start = Integer.valueOf(range.substring(range.indexOf("=") + 1, range.indexOf("-")));
    long count = fileLen - start;
    long end;
    if (range.endsWith("-"))
        end = fileLen - 1;
    else
        end = Integer.valueOf(range.substring(range.indexOf("-") + 1));
    String ContentRange = "bytes " + String.valueOf(start) + "-" + end + "/" + String.valueOf(fileLen);
    resp.setStatus(206);
    resp.setContentType("video/mpeg3");
    resp.setHeader("Content-Range", ContentRange);
    in.seek(start);
    try {
        IOUtils.copyBytes(in, out, count, false);
    } catch (Exception e) {
        throw e;
    }
}
in.close();
out.close();

}
private String HADOOP_URL;
HDFS_PATH hdfs文件系