问从服务器加载视频文件的Servlet

EN

protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException
{
    System.out.println("Start of doGet");

    FileSystemManager fsManager = null;
    try {
         fsManager = VFS.getManager();
    } catch (FileSystemException e) {

        e.printStackTrace();
    }


    // Get requested image by path info.
    String requestedImage = request.getPathInfo();

    // Check if file name is actually supplied to the request URI.
    if (requestedImage == null) {
        // Do your thing if the image is not supplied to the request URI.
        // Throw an exception, or send 404, or show default/warning image, or just ignore it.
        response.sendError(HttpServletResponse.SC_NOT_FOUND); // 404.
        return;
    }

    FileObject basePath;

    try {

        basePath = fsManager.resolveFile( imagePath + URLDecoder.decode(requestedImage, "UTF-8"));


    } catch (FileSystemException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();

        return;
    }
    String baseName = basePath.getName().getBaseName();
    String contentType = getServletContext().getMimeType(baseName);
      // Init servlet response.
    response.reset();
    response.setBufferSize(DEFAULT_BUFFER_SIZE);
    response.setContentType(contentType);
    response.setHeader("Content-Length", String.valueOf(basePath.getContent().getSize()));


    // Prepare streams.
    BufferedInputStream input = null;
    BufferedOutputStream output = null;

    int count = 0;
    try {
        // Open streams.
        FileContent fc = basePath.getContent(); 
        InputStream is = (InputStream) fc.getInputStream(); 
        input = new  BufferedInputStream(is, DEFAULT_BUFFER_SIZE);
        output = new BufferedOutputStream(response.getOutputStream(), DEFAULT_BUFFER_SIZE);

        // Write file contents to response.
        byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
        int length;
        while ((length = input.read(buffer)) > 0) {
            output.write(buffer, 0, length);
            count++;
        }
        System.out.println("no exception occurred");

    }
    catch(Exception e){
        System.out.println("while did " + count + " iterations befor exception occurred");
        System.out.println("Catched exception: " + e);
    }
    finally{    
        // Gently close streams.
        System.out.println("closing streams");
         close(input);
         close(output);

    }
}