Write file on client

Hi all,
Is it possible to write a text file onto the client C drive from the portal?
The spec is; put 'download' button beside table, when clicked write table contents to an XML file, store on client for offline viewing later.
I wrote some code and it writes the file contents fine, creates a file and saves it on the server, obviously I want to save on the client for later use/display.
As always your help/input is appreciated.
Thanks,
Patrick.

Hi Gregor,
I figured it was browser security and obviously I wouldn't want every weebsite writing files to my harddisk.
Thanks for the input, I'll think about how to do this as comfortably as possible for the user. I'm almost certain we can't trust them to always save the file to the correct directory. I'll think about it.
Thanks again,
Patrick.

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Hi,
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Please let me know at the Earliest.
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Mehul Dave

1) Well I find it rather convenient to deploy a web app as just one file rather than a bunch of files. For deployment it's much better. However I prefer using expanded files when developping (to use auto reload in Tomcat for example)
2) It is a bad idea to upload files inside your webapp's context (ie: in it's deployment directory) because one day an uninformed system administrator might come and redeploy the web app and therefore delete all your uploaded files (believe me, I've already experienced this!)
What i do usually is upload it in a completely different directory, something like /uploaded_files. Your uploaded files are therefore completely independant from your webapp
However it is a bit trickyer to get those files back. Let's take the example of image uploads. You have 2 ways of proceeding:
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You can call it this way :
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To expand on Dan's answer: CF doesn't have any interaction with the client browser at all: client->server comms are handled by the client and the web server; the web server simply asks CF to provide the response data if the file requested is a CF file. But even then all CF does is process the requested file and return data to the web server.
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Adam

Write a file on client from java procedure

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File file=new File("C:\\DiscoD\\myFile.txt");
FileWriter fw=new FileWriter(file);
fw.write("ciao");
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I want to write a java procedure loading java class on oracle with utility loadjava and this work for example for classical Hello World. Now i want to write data on a text file on my hard disk using class java calling the procedure for example in this mode:
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Java applet writes to file on client, no signing necessary

Hi,
I wonder if this is a feature or bug:
I download and execute in my browser an unsigned applet/jar myCharts.jar from server. The applet references classes from package org.jfree.chart, which are not packed in myCharts.jar downloaded from server, but are locally stored on client in jre/lib/ext/jfreechart.jar (and therefore JVM running the applet loads and uses these local classes from local jar).
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permission java.lang.RuntimePermission "accessDeclaredMembers";
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The following is a duplicate posting in reponse to similar question:
http://forum.java.sun.com/thread.jsp?forum=4&thread=200482&start=0&range=30#735223
In short, you cannot write to a server without help from servier-side software such as a servlet, cgi, ASP, etc.
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We can write, if the applet or jar file is signed

Write a text file on client

I want to realise an applet which can write a text file on client. I use java 2 and an certified applet.
I'm searching a script.
If you have a solution or a script thank you.
A+
Ps: I'm french and sorry for my english

FileOutputStream fos = new FileOutputStream(filname);
DataOutputStream dos = new DataOutputStream(fos);
try {
dos.writeBytes("some string");
} catch (Exception e) {
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This is a Java forum,not a Javascript forum. Maybe you should ask here [http://www.webdeveloper.com/forum/forumdisplay.php?forumid=3&s|http://www.webdeveloper.com/forum/forumdisplay.php?forumid=3&s].

To upload a file from client machine to server machine

Hi everybody!
Could anyone plz help me. I am struck in a problem
I want to transfer a file from client's machine to server but I am not able to upload
It is tranferring the file only to the local machine
I am using orielley package It is transferring files only to my local machine but not to the server .Can anyone correct it. It's very urgent
how to write the relative path for server
I am using this path and it is not uploading
MultipartRequest multi = new MultipartRequest(request, "../<administrator>:<dev2daask>@dev2:C:/123data/", 5 * 1024 * 1024);
Here is my code:
<%@ page import="java.util.*" %>
<%@ page import="javax.servlet.*" %>
<%@ page import="javax.servlet.http.*" %>
<%@ page import="java.io.*" %>
<%@ page import="com.oreilly.servlet.MultipartRequest"%>
<%
try {
// Blindly take it on faith this is a multipart/form-data request
// Construct a MultipartRequest to help read the information.
// Pass in the request, a directory to saves files to, and the
// maximum POST size we should attempt to handle.
// Here we (rudely) write to the server root and impose 5 Meg limit.
MultipartRequest multi = new MultipartRequest(request, "../<administrator>:<dev2daask>@dev2:C:/123data/", 5 * 1024 * 1024);
out.println("<HTML>");
out.println("<HEAD><TITLE>UploadTest</TITLE></HEAD>");
out.println("<BODY>");
out.println("<H1>UploadTest</H1>");
// Print the parameters we received
out.println("<H3>Params:</H3>");
out.println("<PRE>");
Enumeration params = multi.getParameterNames();
while (params.hasMoreElements()) {
String name = (String)params.nextElement();
String value = multi.getParameter(name);
out.println(name + " = " + value);
out.println("</PRE>");
// Show which files we received
out.println("<H3>Files:</H3>");
out.println("<PRE>");
Enumeration files = multi.getFileNames();
while (files.hasMoreElements()) {
String name = (String)files.nextElement();
String filename = multi.getFilesystemName(name);
String type = multi.getContentType(name);
File f = multi.getFile(name);
out.println("name: " + name);
out.println("filename: " + filename);
out.println("type: " + type);
if (f != null) {
out.println("length: " + f.length());
out.println();
out.println("</PRE>");
catch (Exception e) {
out.println("<PRE>");
out.println("</PRE>");
out.println("</BODY></HTML>");
%>

you have not understood my point
how does this code will run on servlet when I want to upload a file from client's
machine to server machine
what I am doing is I am giving an option to the user that he/she can browse the file and then select any file and finally it's action is post in the jsp form for which I have sent the code
All the computers are connected in LAN
So how to upload a file from client's machine to server's machine
Plz give me a solution

How to upload file from client machine to database in server machine?

I am developing a web application. this application is suppose to take file from client machine and store that to database in the server side.
My jsp form is of multi part type. but I am confused about what to write in servlet.
Can any one help me ?
Edited by: chinmaya_mishra on Feb 16, 2009 2:55 AM
Edited by: chinmaya_mishra on Feb 16, 2009 2:58 AM

http://www.google.com/search?q=jdbc+blob
Blob processing varies between databases; see also examples for whatever database you are using, e.g.
http://www.google.com/search?q=jdbc+blob+oracle
If you are storing text data instead of binary data, replace "blob" by "clob" in the searches.

How to save a file in client system?

I have a requiremnet like this:
"When the user selects a file from his local drive (say c:\), I have to upload the file to a LAN connected to his machine."
I have written the TestUpload class like below. It will work if my server is on the same machine. But, how can i do this if it is Unix Server?
I was trying to do this for 2-3 days. Please help.
protected void doGet(
HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
PrintWriter out = response.getWriter();
HttpSession session = null;
UploadListener listener = null;
long contentLength = 0;
System.out.println("I am inside doGet");
if (
((session = request.getSession()) == null) ||
listener =
(UploadListener) session.getAttribute("LISTENER")
) == null
) || ((contentLength = listener.getContentLength()) < 1)) {
out.write("");
out.close();
return;
response.setContentType("text/html");
long percentComplite =
((100 * listener.getBytesRead()) / contentLength);
out.print(percentComplite);
out.close();
protected void doPost(
HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
// create file upload factory and upload servlet
FileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
// set file upload progress listener
UploadListener listener = new UploadListener();
HttpSession session = request.getSession();
session.setAttribute("LISTENER", listener);
// upload servlet allows to set upload listener
upload.setProgressListener(listener);
List items = null;
FileItem fileItem = null;
String filename = null;
String fileName = null;
String directory = null;
String version = null;
String fullPath = null;
String extension = null;
String folderName = null;
try {
// iterate over all uploaded files
items = upload.parseRequest(request);
for (Iterator i = items.iterator(); i.hasNext();) {
fileItem = (FileItem) i.next();
System.out.println("New file Item::: " + fileItem.getName());
if (
(fileItem.getName() != null) &&
!fileItem.getName()
.trim()
.equals("")) {
fullPath = fileItem.getName();
extension = fullPath.substring(fullPath.lastIndexOf("."));
directory = "\\\\MyLAN\\";
fileName =
fullPath.substring(
fullPath.lastIndexOf("\\") + 1,
fullPath.lastIndexOf("."));
folderName = getFolderName(directory, fileName, extension);
version =
getVersionNumber(
directory + folderName, fileName, extension);
String strFilePath =
directory + folderName + fileName + version +
extension;
System.out.println("path:: " + strFilePath);
//Creating the destination File object.
File file = new File(strFilePath);
if (!fileItem.isFormField()) {
if (fileItem.getSize() > 0) {
// code that handle uploaded fileItem
// don't forget to delete uploaded files after you done with them! Use fileItem.delete();
fileItem.write(file);
fileItem.delete();
System.out.println("upload successful");
// indicate that the upload was successfull
writeLog(
directory + folderName + "log.txt",
now() + " ::: " + "Uploaded the version number:: " + version);
response.getWriter()
.write("upload successful");
} catch (FileUploadException e) {
response.getWriter()
.write(e.getMessage());
e.printStackTrace();
} catch (Exception e) {
response.getWriter()
.write(e.getMessage());
e.printStackTrace();
} finally {
session.removeAttribute("LISTENER");
public String getFolderName(
String directory, String fileName, String extension) {
File dir = new File(directory);
boolean folderFound = false;
String foldername = null;
String logFileName = "";
File getFolderNames[] = dir.listFiles();
for (int i = 0; i < getFolderNames.length; i++) {
foldername = getFolderNames.getName();
if (foldername.equalsIgnoreCase(fileName)) {
folderFound = true;
break;
if (!folderFound) {
File f = new File(directory + fileName);
f.mkdir();
f = new File(directory + fileName + "/log.txt");
try {
f.createNewFile();
} catch (IOException e) {
e.printStackTrace();
logFileName = directory + fileName + "/log.txt";
writeLog(logFileName, "***********************************");
writeLog(logFileName, "Log for the file " + fileName);
writeLog(logFileName, "***********************************\n\n");
writeLog(logFileName, now() + " ::: " + "Created");
return fileName + "\\";
public String getVersionNumber(
String directory, String fileName, String extension) {
File dir = new File(directory);
boolean fileFound = false;
int version = 0;
File getFolderNames[] = dir.listFiles();
version = getFolderNames.length;
return "_" + version;
public void writeLog(String fileName, String text) {
try {
Writer output = null;
File file = new File(fileName);
output = new BufferedWriter(new FileWriter(fileName, true));
output.write(text + "\n");
output.close();
System.out.println("Log file has been written");
} catch (IOException e1) {
e1.printStackTrace();
Edited by: AnishThomas on Mar 12, 2008 10:52 PM

Thanks for your reply!!!
jwenting wrote:
no, your code is NOT correct.
It doesn't "upload" anything, as I stated before.It is working perfectly fine if the destination folder is connected to the server machine (which is not the case now).
>
Look into multipart MIME requests, Jakarta Commons File Upload, and things like that to actually upload files to a server instead of insisting on reading them directly from the client's filesystem in your servlet and wondering why that doesn't work if the servlet container is running on a different computer from the client.I AM using Jakarta Commons File Upload. The problem is when I try to access the destination folder(which is in client machine), it can't find as it is searching for the corresponding folder in the server.
>
Unless and until you do that, you're wasting our time and your own.I thought someone could help me i giving me some pointers which I missed. Thanks again!!
Edited by: AnishThomas on Mar 14, 2008 8:13 AM

Is there any way to create files on client

Hi,
In a servlet class, I use java.net to get the client IP address, and I shared one folder on the client computer. But I got a java.io.IOException: Access is denied error when I was trying to create a file in the shared folder.
I changed the java.policy to let the class have permission to write files. Any one can give me some suggestions?

No server-side solution can help u! u should just use Applets.
( or any fat-client like a Java Application )
--Behrad

Not able to create a text file in Client Machine using Forms 10g

Hi - I'm mot able to create a text file in Client Machine using Forms 10g. I'm getting error when system executes the bolded line.(i.e. CLIENT_TEXT_IO.FOPEN). During run-time system is throwing "ORA-06508: PL/SQL: could not find program unit being called".
I had attached webutil.pll in the form.
Please advise me.
DECLARE
l_Temp CLIENT_TEXT_IO.FILE_TYPE;
LC$Name Varchar2(100) ;
LC$Fic Varchar2(100) ;
LN$Lines Pls_integer := 0 ;
LC$Line Varchar2(4000) ;
Cursor C_CUR Is
Select * From TEST_TEXTIO where rownum <= 50;
BEGIN
LC$Name := 'tmp_file.txt' ;
LC$Fic := 'c:\temp\tmp_file.txt';
Begin
l_temp := CLIENT_TEXT_IO.FOPEN( 'C:\temp\tmp_file.txt', 'W');
Exception
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Exception
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message('err='||sqlerrm);message(' ');
display_error;
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Thanks.
Arun

Hi ,
i have one Question though its not related to thos question if some could help me it will be really helpful,
i have created one program to import and export excel to forms vice versa, if the form is attached with webutil its working fine am using ole2.but i have a new idea if i add this program in menu, it can be used for all the forms attched to that menu, i made program also, but problem am facing right now is if the form is not attched with webutil it will not work so is there possiblity to share my webutil from one form to another form ,so i will keep one form as a interface form in that webutil will be attched ,i can share that webutil to all other forms so that all the forms no need to attach webutil again
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Applet-Servlet - Creating a new file on client's mashine

Hi all!
I need to write a program, that will get a data from client through Applet text fields and save it to a new(or rewrite existing) file on client mashine. To save it, I want to use Servlet, because Applet can't do this because of security restrictions. So I think of sending data from Applet to Servlet, which will save it in a new file (will download this file back to the client's mashine).
I found the following code in forums to download a file from server to client:
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import javax.servlet.*;
import javax.servlet.http.*;
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Could anybody help me please?
Thank you in advanse!
P.S. I've already wrote the Applet code, what I need now is o n l y the help with a Servlet part!
Best regards.

Thanks, but I want not client but servlet save the file automatically in a given path on client's mashine. Is there any way to do that?
Thanks.

Write file on client

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