Class UploadServlet

samples/java/src/resumable/js/upload/UploadServlet.java:18–95

This is a servlet demo, for using Resumable.js to upload files. by fanxu123

 * by fanxu123
 */
public class UploadServlet extends HttpServlet {

    public static final String UPLOAD_DIR = "e:\\";

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        int resumableChunkNumber        = getResumableChunkNumber(request);

        ResumableInfo info = getResumableInfo(request);

        RandomAccessFile raf = new RandomAccessFile(info.resumableFilePath, "rw");

        //Seek to position
        raf.seek((resumableChunkNumber - 1) * info.resumableChunkSize);

        //Save to file
        InputStream is = request.getInputStream();
        long readed = 0;
        long content_length = request.getContentLength();
        byte[] bytes = new byte[1024 * 100];
        while(readed < content_length) {
            int r = is.read(bytes);
            if (r < 0)  {
                break;
            }
            raf.write(bytes, 0, r);
            readed += r;
        }
        raf.close();


        //Mark as uploaded.
        info.uploadedChunks.add(new ResumableInfo.ResumableChunkNumber(resumableChunkNumber));
        if (info.checkIfUploadFinished()) { //Check if all chunks uploaded, and change filename
            ResumableInfoStorage.getInstance().remove(info);
            response.getWriter().print("All finished.");
        } else {
            response.getWriter().print("Upload");
        }
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        int resumableChunkNumber        = getResumableChunkNumber(request);

        ResumableInfo info = getResumableInfo(request);

        if (info.uploadedChunks.contains(new ResumableInfo.ResumableChunkNumber(resumableChunkNumber))) {
            response.getWriter().print("Uploaded."); //This Chunk has been Uploaded.
        } else {
            response.setStatus(HttpServletResponse.SC_NOT_FOUND);
        }
    }

    private int getResumableChunkNumber(HttpServletRequest request) {
        return HttpUtils.toInt(request.getParameter("resumableChunkNumber"), -1);
    }

    private ResumableInfo getResumableInfo(HttpServletRequest request) throws ServletException {
        String base_dir = UPLOAD_DIR;