Have you seen: http://www.servlets.com/cos/javadoc/com/oreilly/servlet/multipart/FileRename Policy.html http://www.servlets.com/cos/javadoc/com/oreilly/servlet/multipart/DefaultFil eRenamePolicy.html
We use an implementation of FileRenamePolicy when instantiating the MultipartRequest. This may be what you need. -----Original Message----- From: hugo [mailto:[EMAIL PROTECTED]] Sent: 02 October 2002 11:07 To: [EMAIL PROTECTED] Subject: problem using MultipartParser and MultipartRequest together Hi I have a jsp file where I would like download files to a particular directory on the server. I am have form fields, including file upload fields, the content of which is forwarded to a second jsp where I use MultipartRequest from the com.oreilly.servlet.* package to download the uploaded files to a location on the server. This all works well, but I would like to check first if file(s) with the same filename already exists in that directory on the server. This can be done by executing a unix command on the server and getting the filenames from the directory. So far so good. However, the moment I use MultipartRequest to get the names of the files that are uploaded (to compare them with the ones already in the directory), they are immediately downloaded to the directory. So I thought I use MultipartParser first to obtain the filenames - but the moment I do this, I am using the generic method HttpServlet request and this means that, when using MultipartParser early in the jsp it seems I can no longer use MultipartRequest afterwards and vice versa (if there's a solution to this, please let me know). This led me to try to make the part that checks existing filenames agains the filenames in the upload fields into a javaBean - I can then call the Bean's method that does the checking from my second jsp file (to which form variables are forwarded). The bean would simply return a string containing "yes" of "no" depending on whether the filenames to be stored are unique or not. However, I have to pass the contents of the fields that contains the filenames to the bean - which means I have to once more use a request method to get those values in the first place. So the problem is that somehow I have to pass on HttpServlet request values to the bean, and I am not sure how to do this without getting the values out first with MultiPartParser - which makes it impossible for me to use MultipartRequest. The bean is listed in my jsp file as: <jsp:useBean id="checkupload" scope="session" class="com.geoinformex.project.checkUpload"/> and I am calling its method further down in the jsp: String samefile = checkupload.getdoCheck(BUT HERE I NEED TO PASS IN A REQUEST!); I have to pass in the request (parameter of file to be uploaded) to the bean - have a look at the method below in the bean itself. Note that without making the bean extend HttpServlet I cannot construct MultipartParser parser in the Bean's method getdoCheck later on. Complex problem, I know, but I am sort of hoping someone can set me back on the right path, as at this stage I am really lost as how to proceed. Any help, particularly code examples will be greatly appreciated. Thanks very much. Hugo *** Here is the bean: package com.geoinformex.project; import java.io.*; import java.text.*; import java.util.*; import javax.servlet.*; import javax.servlet.http.*; import java.sql.*; import com.oreilly.servlet.*; import com.oreilly.servlet.multipart.*; import com.oreilly.servlet.multipart.MultipartParser; public class checkUpload extends HttpServlet{ //String lineOfText =""; String proj_id_b =""; String proj_id =""; //String makedir =""; int proj_id_count = 0; Vector proj_id_number = new Vector(); Vector proj_id_base = new Vector(); Vector project_ID_list = new Vector(); Vector existingfiles = new Vector(); String upload1 = ""; String upload2 = ""; String upload3 = ""; Part part; public String getdoCheck(HttpServletRequest request,HttpServletResponse response) throws IOException, ServletException { String samefile = ""; //Trying to get the filenames from the upload fields from my form (but this fails). MultipartParser parser = new MultipartParser(request, 10*1024*1024); while ((part = parser.readNextPart()) != null) { if (part.isFile()) { // It's a file part I am after FilePart filePart = (FilePart) part; String fileName = filePart.getFileName(); if (fileName != null) { existingfiles.add(fileName); System.out.println("filename: " + fileName); } } } // Reading in filenames from the directory. try { Process p = Runtime.getRuntime().exec("ls /var/www/projects_data/"); BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream())); String s = ""; BufferedReader stdError = new BufferedReader(new InputStreamReader(p.getErrorStream())); while ((s = stdInput.readLine()) != null) { System.out.println ("<br>line of input is: " + s); StringTokenizer tr = new StringTokenizer(s," ", true ); String t = tr.nextToken(); System.out.println("<br>token is: "+ t); for (int i = 0; i < existingfiles.size(); i++) { //Comparing filenames obtained from directory with those obtained from file input fields. if (t.equals(existingfiles.get(i).toString())) { samefile = "yes"; } else { samefile = "no"; } } } } catch (IOException e) { System.out.println("exception: "); e.printStackTrace(); System.exit(-1); } return samefile; } } -- Dr Hugo Bouckaert Systems and Programming Engineer GeoInformatics Exploration Australia P/L 57 Havelock St West Perth, WA 6005 PO Box 1675, West Perth 6872 Ph: 61 08 9420 7400 Fax: 61 08 9226 1299 www.geoinformex.com ------------------------------------------------------------------------ This email and any attachments may be confidential or legally privileged. 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