What I've done is to keep a vector with the files already stored. Every
time i write to a file I check first in the vector if the file has already
been created.
At 00:46 3/12/2002 -0800, you wrote:
>Hi all friends,
>
>Iam developing one application(front end swing , back
>end servlet and http protocol through urlconnection)
>for data transfer from one destination to another.And
>application have facility of suspend of one file in
>between and start another new file from scratch and
>can resume that file which is stopped in between
>later.Now for that I want to put condition in servlet
>so that it can recognise two situation:-
>
>1.if it is new file it can write in the file and
>2.if it is partial file it can append into the file by
>opening the file in append mode.
>
>But I couldn't decide what will be the syntax of
>condition.Can any one plz suggest me how i can put
>conditions.Any help will be highly appreciated.Below r
>my codes:-
>
>RecvServlet.java:-
>=================
>public class RecvServlet extends HttpServlet {
>public static final String BASE_DIR = "d:\\temp";
>File baseFile;
>
>public void init() throws ServletException {
>super.init();
>baseFile = new File(BASE_DIR);
>}
>
>public void doGet(HttpServletRequest request,
>HttpServletResponse response)
>throws ServletException, IOException
>{
>response.sendError(response.SC_NOT_ACCEPTABLE, "Must
>use POST method.");
>}
>public void doPost(HttpServletRequest
>request,HttpServletResponse response)
>throws ServletException, IOException
>{
>String filename;
>filename = request.getParameter("name");
>String path;
>path = request.getParameter("path");
>File outfile = new File(filename);
>if (path != null && filename != null) {
>outfile = new File(path, filename);
>System.err.println("Final output file: " +
>outfile.getAbsolutePath());
>}
>DataInputStream dis;
>dis = new DataInputStream(request.getInputStream());
>OutputStream os;
>os = new BufferedOutputStream(new
>FileOutputStream(outfile));
>int cc;
>byte [] buf = new byte[512];
>long lim, tot = 0;
>lim = dis.readLong();
>try {
>System.err.println("Reading " + lim + " bytes...");
>for(cc = dis.read(buf, 0, 512);
>cc > 0 && tot < lim;
>cc = dis.read(buf, 0, 512))
>{
>os.write(buf, 0, cc);
>tot += cc;
>System.err.print("+" + cc + "(" + tot + ")");
>if (tot >= lim) break;
>}
>}
>catch (IOException ie) {
>try { os.close(); } catch (Exception e2) { }
>System.err.println("Exception during file transfer!");
>
>}
>System.err.println("Read " + tot + " bytes.");
>os.close();
>response.setContentType("text/plain");
>PrintStream pos = new
>PrintStream(response.getOutputStream());
>pos.println(tot);
> }
>}
>
>Regards
>Bikash
>
>
>
>
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