Hi:
can anyone help me with the transfer of afile from one machine to another using servlets. I want a java program which when run from the dos prompt would transfer a file on my machine (location is hardcoded) to another machine and save it in a particular folder on that machine. both the machines are in the same network.

naren

Naren,
If u are looking to upload a file to another machine/server there are a couple of ways to go about it.
1) Jason hunter has a mutipart request/response @ www.servlets.com( (http://www.servlets.com() for Form based file uploads)
2) You can use this code which is given in the o'reilly book

import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class UploadServlet extends HttpServlet {
static final int MAX_SIZE=10240000;
String rootPath, successMessage;

public void init(ServletConfig config) throws ServletException
{
super.init(config);
rootPath=config.getInitParameter("RootPath");
if (rootPath==null)
{
rootPath="/";
}
successMessage=config.getInitParameter("SuccessMessage");
if (successMessage==null)
{
successMessage="File Upload Complete";
}
}
public void doPost(HttpServletRequest request,HttpServletResponse response)
{
ServletOutputStream out=null;
DataInputStream in=null;
FileOutputStream fileOut=null;
try
{
response.setContentType("text/plain");
out=response.getOutputStream();
}
catch(IOException ie)
{
System.out.println("Error getting output stream");
System.out.println("Error description" +ie);
return;
}
try
{
String contentType=request.getContentType();
if (contentType!=null && contentType.indexOf("multipart/form-data")!=-1)
{
in = new DataInputStream(request.getInputStream());
int formDataLength=request.getContentLength();
if (formDataLength>MAX_SIZE)
{
out.println("Sorry the file is too large to upload");
out.flush();
return;
}
byte dataBytes[]=new byte[formDataLength];
int bytesRead=0;
int totalBytesRead=0;
while (totalBytesRead<formDataLength)
{
bytesRead=in.read(dataBytes,totalBytesRead,formDataLength);
totalBytesRead+=bytesRead;
}
String file=new String(dataBytes);
dataBytes=null;
int lastIndex=contentType.lastIndexOf("=");
String boundary=contentType.substring(lastIndex+1,contentType.length());
String directory="";
if (file.indexOf("name="Directory"")>0)
{
directory=file.substring(file.indexOf(file.indexOf("name="Directory"")));
directory=directory.substring(directory.indexOf("n")+1);
directory=directory.substring(directory.indexOf("n")+1);
directory=directory.substring(0,directory.indexOf("n")-1);
if (directory.indexOf("..")>0)
{
out.println("Security Error Cannot upload to a directory higher in the tree");
return;
}
}
String successPage="";
if (file.indexOf("name="SuccessPage"")>0)
{
successPage=file.substring(file.indexOf("name="SuccessPage""));
successPage=successPage.substring(successPage.indexOf("n")+1);
successPage=successPage.substring(successPage.indexOf("n")+1);
successPage=successPage.substring(0,successPage.indexOf("n")-1);

}

String overWrite;

if (file.indexOf("name="OverWrite"")>0)
{
overWrite=file.substring(file.indexOf("name="OverWrite""));
overWrite=overWrite.substring(overWrite.indexOf("n")+1);
overWrite=overWrite.substring(overWrite.indexOf("n")+1);
overWrite=overWrite.substring(0,overWrite.indexOf("n")-1);

}
else
{
overWrite="false";
}
String overWritePage="";

if (file.indexOf("name="OverWritePage"")>0)
{
overWritePage=file.substring(file.indexOf("name="OverWritePage""));
overWritePage=overWritePage.substring(overWritePage.indexOf("n")+1);
overWritePage=overWritePage.substring(overWritePage.indexOf("n")+1);
overWritePage=overWritePage.substring(0,overWritePage.indexOf("n")-1);

}

String saveFile=file.substring(file.indexOf("filename="")+10);
saveFile=saveFile.substring(0,saveFile.indexOf("n"));
saveFile=saveFile.substring(saveFile.lastIndexOf("")+1,saveFile.indexOf("""));

int pos;
pos=file.indexOf("filename="");
pos=file.indexOf("n",pos)+1;
pos=file.indexOf("n",pos)+1;
pos=file.indexOf("n",pos)+1;

int boundaryLocation=file.indexOf(boundary,pos)-4;
file=file.substring(pos,boundaryLocation);
String fileName=new String(rootPath+directory+saveFile);
File checkFile=new File(fileName);
if (checkFile.exists())
{
if (!overWrite.toLowerCase().equals("true"))
{
if(overWritePage.equals(""))
{
out.println("Sorry the file already exists");
}
else
{
response.sendRedirect(overWritePage);
}
return;
}
}

File fileDir=new File(rootPath+directory);
if (!fileDir.exists())
{
fileDir.mkdirs();
}

fileOut=new FileOutputStream(fileName);
fileOut.write(file.getBytes(),0,file.length());

if(successPage.equals(""))
{
out.println("successMessage");
out.println("File Written to" +fileName);
}
else
{
response.sendRedirect(successPage);
}
}
else
{
out.println("Request not multipart/form-data");
}
}
catch(Exception e)
{
try
{
System.out.println("Error in doPost");
out.println("An Unexpected Error Occured");
out.println("Error Description" +e);
}
catch(Exception f)
{

}
}
finally
{
try
{
fileOut.close();
}
catch(Exception f)
{
}
try
{
in.close();
}
catch(Exception f)
{
}
try
{
out.close();
}
catch(Exception f)
{
}
}
}
}

Works fine for me...
Hope that helps

Ajay


<BLOCKQUOTE><font size="1" face="Verdana,Arial,Helvetica">quote:</font><HR>Originally posted by narensv:

Hi:
can anyone help me with the transfer of afile from one machine to another using servlets. I want a java program which when run from the dos prompt would transfer a file on my machine (location is hardcoded) to another machine and save it in a particular folder on that machine. both the machines are in the same network.

naren[/quote]