NB: if using remote path please share the folder where you pickup the file exist other wise it will give the security issue
Step 1>SocketServerExample Run in different Server or eclipse
package com.kartik.socket;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.lang.ClassNotFoundException;
import java.net.ServerSocket;
import java.net.Socket;
/**
* This class implements java Socket server
* @author Mandal Kartik
* @version 1.0
* @since 2015-07-08
*/
public class SocketServerExample {
//static ServerSocket variable
private static ServerSocket server;
//socket server port on which it will listen
private static int port = 9876;
public static void main(String args[]) throws IOException, ClassNotFoundException{
//create the socket server object
server = new ServerSocket(port);
//keep listens indefinitely until receives 'exit' call or program terminates
while(true){
System.out.println("Waiting for client request");
//creating socket and waiting for client connection
Socket socket = server.accept();
//read from socket to ObjectInputStream object
ObjectInputStream objectInputStream = new ObjectInputStream(socket.getInputStream());
//convert ObjectInputStream object to String
String message = (String) objectInputStream.readObject();
System.out.println("Message Received: " + message);
File file=new File(message);
//create ObjectOutputStream object
ObjectOutputStream objectOutPutStream = new ObjectOutputStream(socket.getOutputStream());
if(file.exists()){
FileReader fileReader = new FileReader(message);
BufferedReader bufferReader = new BufferedReader(fileReader);
//write object to Socket
String line;
StringBuffer stringBuffer=new StringBuffer();
while((line = bufferReader.readLine()) != null) {
System.out.println(line);
stringBuffer.append(line);
stringBuffer.append(System.getProperty("line.separator"));
}
objectOutPutStream.writeObject(stringBuffer.toString());
fileReader.close();
//close resources
objectInputStream.close();
objectOutPutStream.close();
socket.close();
}else{
System.out.println("File is not here");
objectOutPutStream.writeObject("File is not there");
objectOutPutStream.close();
socket.close();
}
//terminate the server if client sends exit request
if(message.equalsIgnoreCase("exit")) break;
}
System.out.println("Shutting down Socket server!!");
//close the ServerSocket object
server.close();
}
}
Step 2> Run in Different Server of SocketClientExample
A>
package com.kartik.socket;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.UnknownHostException;
import java.util.Properties;
import java.util.Scanner;
/**
* This class implements java socket client
* @author MandalKC
*
*/
public class SocketClientExample {
public static void main(String[] args) throws UnknownHostException,
ClassNotFoundException, IOException, InterruptedException {
SocketClientImplement socketClientImplement = new SocketClientImplement();
String domainName = null;
int portNumberOfServer = 0;
Properties prop=new Properties();
InputStream input= null;
String fileName = null;
String fileNameWithPath = null;
/**
* This is read properties file of Hard code data of local or remote syetem
*/
/*try{
input= new FileInputStream("D:\\WorkSpace\\clientserver\\SocketClient\\src\\com\\kartik\\socket\\configure.properties");
//getClass().getClassLoader().getResourceAsStream("configure.properties");//
prop.load(input);
fileName = prop.getProperty("fileName");
fileNameWithPath=prop.getProperty("filePath");
}catch(IOException e){
e.printStackTrace();
}*/
/**
* This is hard code data of local system
*/
/* fileName = "design.txt";
fileNameWithPath = "D:\\";*/
/**
* Hard code data of file name and file path of remote system
*/
/* fileName = "xyz.dat";
fileNameWithPath = "\\\\IN-SAMALRAR-1\\\\data\\\\XA\\\\cfd\\\\ssim\\";*/
/**
* Console read for file name and file path
*/
System.out.println("First File name space file path please enter");
Scanner console = new Scanner(System.in);
while (console.hasNext()) {
fileName=console.next();
System.out.println("fileName--->>>>"+fileName);
fileNameWithPath=console.next();
System.out.println("fileNameWithPath--->>>>"+fileNameWithPath);
break;
}
socketClientImplement.callSocketServer(domainName, portNumberOfServer,fileName, fileNameWithPath);
}
}
B>
package com.kartik.socket;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
/**
* <h1>Socket Client Implement!</h1>
* The SocketClientImplement program implements an application that
* simply displays call to Socket Server to the standard output.
* <p>
*
* @author Mandal Kartik
* @version 1.0
* @since 2015-07-08
*/
public class SocketClientImplement {
/**
* callSocketServer method use for Socket server call
* @param domainName
* domainName like as www.google.com
* @param portNumberOfServer
* port number of socket server by default like 9876
* @param fileName
* fileName
* @param fileNameWithPath
* fileNameWithPath
* @throws UnknownHostException
* UnknownHostException
* @throws IOException
* IOException
* @throws ClassNotFoundException
* ClassNotFoundException
* @throws InterruptedException
* InterruptedException
*/
@SuppressWarnings("resource")
public void callSocketServer(String domainName, int portNumberOfServer,
String fileName, String filePath)
throws UnknownHostException, IOException, ClassNotFoundException,
InterruptedException {
InetAddress host = null;
//get the localhost IP address, if server is running on some other IP, you need to use that
host = (null != domainName) ? InetAddress.getByName(domainName)
: InetAddress.getLocalHost();
int port = 0;
//get the server socket address port number
port = (portNumberOfServer > 0) ? portNumberOfServer : 9876;
String relPathWithFileName = null;
//get the file path
relPathWithFileName=filePathMethod(fileName,filePath);
System.out.println("Please read copy that path and access this path if it is remote file path access is there or not");
System.out.println(relPathWithFileName);
Socket socket = null;
ObjectOutputStream objectOutputStream = null;
ObjectInputStream objectInputStream = null;
// establish socket connection to server
socket = new Socket(host.getHostName(), port);
// write to socket using ObjectOutputStream
objectOutputStream = new ObjectOutputStream(socket.getOutputStream());
System.out.println("Sending request to Socket Server");
objectOutputStream.writeObject(relPathWithFileName);
// read the server response message
objectInputStream = new ObjectInputStream(socket.getInputStream());
String message = (String) objectInputStream.readObject();
System.out.println("Message: " + message);
// close resources
objectInputStream.close();
objectOutputStream.close();
Thread.sleep(100);
}
/**
* This is find out the absoluteFilePath of a file for any server
* @param fileName
* fileName
* @param pathName
* pathName
* @return absoluteFilePath
*/
public String filePathMethod(String fileName, String pathName) {
String absoluteFilePath = "";
//String workingDir = System.getProperty("user.dir");
String workingDir= pathName;
//String absoluteFilePath = "";
String runnigServerOs = System.getProperty("os.name").toLowerCase();
if (runnigServerOs.indexOf("win") >= 0) {
// if windows
absoluteFilePath = workingDir + "\\" + fileName;
} else if (runnigServerOs.indexOf("nix") >= 0
|| runnigServerOs.indexOf("nux") >= 0
|| runnigServerOs.indexOf("mac") >= 0) {
// if unix or mac
absoluteFilePath = workingDir + "/" + fileName;
} else {
// unknow os?
absoluteFilePath = workingDir + "/" + fileName;
}
System.out.println("Final filepath : " + absoluteFilePath);
return absoluteFilePath;
}
}
I am Kartik Chandra Mandal from Bangalore, India. Working as software engineer in Java technology. Have good knowledge of OWASP and CSRF in security for applications and it's implementation in Java technology.