Develop Reference

Store Image In Other Server Path Using Java

public void storeEmployeeImageDetails(String folderPath, List<Employee> listEmp) {
try {
for (Employee emp : listEmp) {
Blob image;
String imageType;
image = emp.getImageBlob();
imageType = emp.getImageType();
String empId = emp.getEmployeeID();
if (!"".equals(imageType) && image != null) {
String type = imageType.substring(1);
int blobLength = (int) image.length();
byte[] blobAsBytes = image.getBytes(1, blobLength);
BufferedImage imageData = ImageIO.read(new ByteArrayInputStream(blobAsBytes));
ImageIO.write(imageData, type, new File(folderPath + empId + imageType));
}
}
} catch (SQLException | IOException e) {
e.printStackTrace();
logger.error("Exception Occured While Storing Employee Image In Server Folder: " + e);
}
}
I'm Getting Error:
java.io.FileNotFoundException: https:\example.com\hr\uploads\profilepics\100.jpg (The filename, directory name, or volume label syntax is incorrect)
NB: Here folderPath is
https:\\example.com\\hr\\uploads\\profilepics\\ I'm getting from application.properties file.
https:\\example.com is a godaddy server, And It's a PHP project. I'm trying to store images from java application to that server.

public class FTPUploader {
FTPClient ftp = null;
public FTPUploader(String host, String user, String pwd) throws Exception{
ftp = new FTPClient();
ftp.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out)));
int reply;
ftp.connect(host);
reply = ftp.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply)) {
ftp.disconnect();
throw new Exception("Exception in connecting to FTP Server");
}
ftp.login(user, pwd);
ftp.setFileType(FTP.BINARY_FILE_TYPE);
ftp.enterLocalPassiveMode();
}
public void uploadFile(byte[] localFileFullName, String fileName, String hostDir)
throws Exception {
try {
InputStream input = new ByteArrayInputStream(localFileFullName);
this.ftp.storeFile(hostDir + fileName, input);
}catch(Exception e) {
e.printStackTrace();
}
}
public void disconnect(){
if (this.ftp.isConnected()) {
try {
this.ftp.logout();
this.ftp.disconnect();
} catch (IOException f) {
// do nothing as file is already saved to server
}
}
}
}

Connection Refused Error Coming At The Time Of Uploading Files From Local Machine To FTP Server

I am trying to upload files from local machine to ftp server and when this code starts first it store 6 folder data sucessfully on ftp server but from 7th folder to 25th folder i am getting connection refused error ... There is no limitation from client side for connections and only i am using these credentials for testing purpose . Can any one help me?
I am getting this issue because of mirror issue in code but i am not able to figureout this issue. Please help me
package com.epath.smoketest.tests;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPSClient;
public class FTPUploadDirectoryTest {
public static void main(String[] args) {
try {
System.out.println("\n"
+ "---------------------------------------------------------------------------------" + "\r\n");
System.out.println("Read FTP Login details from PROPERTIES file" + "\r\n");
System.out.println(
"---------------------------------------------------------------------------------" + "\r\n");
Properties prop = new Properties();
InputStream input = null;
String inputFS = getAutomationInputDataPath() + "//Validation.properties";
input = new FileInputStream(inputFS);
prop.load(input);
// -Input file with test data
System.out.println("Uploading file on ftp server");
String ftp_port = prop.getProperty("ftp_port");
int ftp_host = Integer.parseInt(prop.getProperty("ftp_host"));
String ftp_username = prop.getProperty("ftp_username");
String ftp_password = prop.getProperty("ftp_password");
String server = ftp_port;
int port = ftp_host;
String user = ftp_username;
String pass = ftp_password;
FTPSClient ftpClient = new FTPSClient();
// connect and login to the server
ftpClient.connect(server, port);
ftpClient.login(user, pass);
// use local passive mode to pass firewall
ftpClient.enterLocalPassiveMode();
System.out.println("Connected");
String remoteDirPath = "/www/ngage/screenshots";
String localDirPath = folderPathForUploadingOnFTP;
uploadDirectory(ftpClient, remoteDirPath, localDirPath, "");
// log out and disconnect from the server
ftpClient.logout();
ftpClient.disconnect();
System.out.println("Disconnected");
} catch (IOException ex) {
System.err.println("Error occured....." + ex.getMessage());
ex.printStackTrace();
}
}
public static void uploadDirectory(FTPSClient ftpClient, String remoteDirPath, String localParentDir,
String remoteParentDir) throws IOException {
File localDir = new File(localParentDir);
File[] subFiles = localDir.listFiles();
if (subFiles != null && subFiles.length > 0) {
for (File item : subFiles) {
String remoteFilePath = remoteDirPath + "/" + remoteParentDir + "/" + item.getName();
if (remoteParentDir.equals("")) {
remoteFilePath = remoteDirPath + "/" + item.getName();
}
if (item.isFile()) {
if (!checkFileExists(remoteFilePath, ftpClient)) {
// upload the file
String localFilePath = item.getAbsolutePath();
boolean uploaded = uploadSingleFile(ftpClient, localFilePath, remoteFilePath);
if (uploaded) {
System.out.println("UPLOADED a file to: " + remoteFilePath);
} else {
System.out.println("COULD NOT upload the file: " + localFilePath);
}
} else {
System.out.println("This file alerady exist on ftp server ");
}
} else {
// create directory on the server
boolean created = ftpClient.makeDirectory(remoteFilePath);
if (created) {
System.out.println("CREATED the directory: " + remoteFilePath);
} else {
System.out.println("COULD NOT create the directory: " + remoteFilePath);
}
// upload the sub directory
String parent = remoteParentDir + "/" + item.getName();
if (remoteParentDir.equals("")) {
parent = item.getName();
}
localParentDir = item.getAbsolutePath();
uploadDirectory(ftpClient, remoteDirPath, localParentDir, parent);
}
}
}
ftpClient.makeDirectory(remoteDirPath);
}
public static boolean uploadSingleFile(FTPSClient ftpClient, String localFilePath, String remoteFilePath)
throws IOException {
File localFile = new File(localFilePath);
InputStream inputStream = new FileInputStream(localFile);
try {
ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
return ftpClient.storeFile(remoteFilePath, inputStream);
} finally {
inputStream.close();
}
}
public static Boolean checkFileExists(String filePath, FTPSClient ftpClient) throws IOException {
InputStream inputStream = ftpClient.retrieveFileStream(filePath);
int returnCode = ftpClient.getReplyCode();
if (inputStream == null || returnCode == 550) {
return false;
}
inputStream.close();
return true;
}
}
Error coming .
COULD NOT upload the file: \\192.168.10.21\volume1\ngage_dev\engineering\ngage\testing\automated\validation\Build_1.19.1\051\2018-04-23_07-54-39_AM\TC_UA_PSWD_0001_006_1.png
java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at org.apache.commons.net.ftp.FTPClient._openDataConnection_(FTPClient.java:920)
at org.apache.commons.net.ftp.FTPSClient._openDataConnection_(FTPSClient.java:627)
at org.apache.commons.net.ftp.FTPClient._retrieveFileStream(FTPClient.java:1980)
at org.apache.commons.net.ftp.FTPClient.retrieveFileStream(FTPClient.java:1967)
at com.epath.smoketest.tests.FTPUploadDirectoryTest.checkFileExists(FTPUploadDirectoryTest.java:124)

JAVA Commons-Net FTPClient, downloading files are corrupted

I am using commans.net api in order to perform tasks e.g uploading and
downloading files from the ftp server. I can perform those tasks
successfully but the downloaded files are corrupted. i couldn't open
those files in usual manner. please help me..
my simple code look like
public class FTPConnect {
public static void main(String[] args) {
startServer();
connectClient();
}
private static void startServer() {
FtpServerFactory serverFactory = new FtpServerFactory();
ListenerFactory factory = new ListenerFactory();
factory.setPort(21);// set the port of the listener (choose your desired
// port, not 1234)
System.out.println("port has been set to 21");
serverFactory.addListener("default", factory.createListener());
PropertiesUserManagerFactory userManagerFactory = new PropertiesUserManagerFactory();
userManagerFactory.setFile(new File("lib/users.properties"));
System.out.println("users.properties has been set..");
userManagerFactory.setPasswordEncryptor(new PasswordEncryptor() {
#Override
public String encrypt(String password) {
return password;
}
#Override
public boolean matches(String passwordToCheck,
String storedPassword) {
return passwordToCheck.equals(storedPassword);
}
});
System.out.println("password has been encrypted...");
BaseUser user = new BaseUser();
user.setName("java");
user.setPassword("shiva.dave");
System.out.println("password has been set..to java and shiva.dave");
user.setHomeDirectory("lib");
System.out.println("home directory has been set...");
List<Authority> authorities = new ArrayList<Authority>();
authorities.add(new WritePermission());
user.setAuthorities(authorities);
UserManager um = userManagerFactory.createUserManager();
try {
um.save(user);// Save the user to the user list on the filesystem
System.out.println("user has been set to the filesystem..");
} catch (FtpException e1) {
e1.printStackTrace();
}
serverFactory.setUserManager(um);
FtpServer server = serverFactory.createServer();
try
{
server.start();//Your FTP server starts listening for incoming FTP-connections, using the configuration options previously set
System.out.println("Server has been started.....");
}
catch (FtpException ex)
{
ex.printStackTrace();
}
}
private static void connectClient() {
FTPClient client = new FTPClient();
try{
client.connect(InetAddress.getLocalHost(), 21);
String loging_success = client.login("java", "shiva.dave") == true ? "success" : "failed";
System.out.println("login: " + loging_success);
FTPFile[] clients = client.listFiles("/");
System.out.println("Listed " + clients.length + " files.");
for (FTPFile file : clients) {
System.out.println(file.getName());
}
for (FTPFile ftpFile : clients) {
String remoteFile2 = ftpFile.getName();
File downloadFile2 = new File("D:/test2/"+ftpFile.getName());
OutputStream outputStream2 = new BufferedOutputStream(new FileOutputStream(downloadFile2));
InputStream inputStream = client.retrieveFileStream(remoteFile2);
byte[] bytesArray = new byte[4096];
int bytesRead = -1;
while ((bytesRead = inputStream.read(bytesArray)) != -1) {
outputStream2.write(bytesArray, 0, bytesRead);
}
boolean success = client.completePendingCommand();
if (success) {
System.out.println("File #2 has been downloaded successfully.");
}
outputStream2.close();
inputStream.close();
}
}
catch(Exception e){
e.printStackTrace();
}
finally{
try{
client.logout();
client.disconnect();
}
catch(Exception e){
e.printStackTrace();
}
}
}
}

I founded a solution and want to put that here..
first of all when you try to download files from the ftp server you must need to specify the file type and transfer mode in order to download file successfully.
here is the code you need to insert.
client.setFileType(FTP.BINARY_FILE_TYPE, FTP.BINARY_FILE_TYPE);
client.setFileTransferMode(FTP.BINARY_FILE_TYPE);
"WATCH IT GUYS"
you must need to insert these two lines of code after successfully logged in otherwise you wouldn't be able to download files successfully...
Hope this answer will help you to download files without being corrupted..

Socket programming, multithreaded programming. Error: IOException: java.net.ConnectException: Connection timed out: connect

I'm a beginner at java and also for socket programming.
This program I've written is aimed to allow p2p file synchronisation between client and server.
When a peer establishes a TCP connection with another peer, both of them will compare the lists of files they possess and proceed to exchange files so that they both have exactly the
same files. A TCP connection must remain open until the peer process is manually terminated at either end of the connection.
I've looked at online tutorials and similar programs to write the code for this program. However, after running the server, the following error is shown on the console when I run the client.
IOException: java.net.ConnectException: Connection timed out: connect
Please advice me on how I could solve the error. Thanks so much in advance!
Here is my code for reference.
Server:
package bdn;
import java.net.*;
import java.io.*;
import java.util.*;
public class MultipleSocketServer extends Thread{
// private Socket connection;
private String TimeStamp;
private int ID;
static int port = 6789;
static ArrayList<File> currentfiles = new ArrayList<File>();
static ArrayList<File> missingsourcefiles = new ArrayList<File>();
public static void main(String[] args)
{
File allFiles = new File("src/bdn/files");
if (!allFiles.exists()) {
if (allFiles.mkdir()) {
System.out.println("Directory is created.");
}
}
//Load the list of files in the directory
listOfFiles(allFiles);
try {
new MultipleSocketServer().startServer();
} catch (Exception e) {
System.out.println("I/O failure: " + e.getMessage());
e.printStackTrace();
}
}
public static void listOfFiles(final File folder){
for (final File fileEntry : folder.listFiles()) {
if (fileEntry.isDirectory()) {
listOfFiles(fileEntry);
} else {
//System.out.println(fileEntry.getName());
currentfiles.add(fileEntry.getAbsoluteFile());
}
}
}
public void startServer() throws Exception {
ServerSocket serverSocket = null;
boolean listening = true;
try {
serverSocket = new ServerSocket(port);
} catch (IOException e) {
System.err.println("Could not listen on port: " + port);
System.exit(-1);
}
while (listening) {
handleClientRequest(serverSocket);
}
//serverSocket.close();
}
private void handleClientRequest(ServerSocket serverSocket) {
try {
new ConnectionRequestHandler(serverSocket.accept()).run();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* Handles client connection requests.
*/
public class ConnectionRequestHandler implements Runnable{
private Socket _socket = null;
public ConnectionRequestHandler(Socket socket) {
_socket = socket;
}
public void run() {
System.out.println("Client connected to socket: " + _socket.toString());
try {
ObjectOutputStream oos = new ObjectOutputStream (_socket.getOutputStream());
oos.flush();
oos.writeObject(currentfiles); //sending to client side.
oos.flush();
} catch (IOException e) {
e.printStackTrace();
}
syncMissingFiles();
}
#SuppressWarnings("unchecked")
public void syncMissingFiles(){
try {
ObjectInputStream ois = new ObjectInputStream(_socket.getInputStream());
System.out.println("Is the socket connected="+_socket.isConnected());
missingsourcefiles= (ArrayList<File>) ois.readObject();
System.out.println(missingsourcefiles);
//add missing files to current file list.
ListIterator<File> iter = missingsourcefiles.listIterator();
File temp_file;
while (iter.hasNext()) {
// System.out.println(iter.next());
temp_file = iter.next();
currentfiles.add(temp_file);
}
} catch (IOException e) {
e.printStackTrace();
} catch ( ClassNotFoundException e) {
e.printStackTrace();
}
}
}
}
Client:
package bdn;
import java.net.*;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.ListIterator;
/* The java.io package contains the basics needed for IO operations. */
import java.io.*;
public class SocketClient {
/** Define a port */
static int port = 2000;
static Socket peer_socket = null;
static String peerAddress;
static ArrayList<File> currentfiles = new ArrayList<File>();
static ArrayList<File> sourcefiles = new ArrayList<File>();
static ArrayList<File> missingsourcefiles = new ArrayList<File>();
static ArrayList<File> missingcurrentfiles = new ArrayList<File>();
SocketClient(){}
public static void listOfFiles(final File folder) {
for (final File fileEntry : folder.listFiles()) {
if (fileEntry.isDirectory()) {
listOfFiles(fileEntry);
} else {
//System.out.println(fileEntry.getName());
currentfiles.add(fileEntry.getAbsoluteFile());
}
}
}
#SuppressWarnings("unchecked")
public static void getListfromPeer() {
try {
ObjectInputStream inList =new ObjectInputStream(peer_socket.getInputStream());
sourcefiles = (ArrayList<File>) inList.readObject();
} catch (ClassNotFoundException e) {
System.err.println("Error in data type.");
}catch (IOException classNot){
System.err.println("Error in data type.");
}
}
public static void compareList1() {
//Compare the source files and current files. If not in current files, add the files to "missingcurrentfiles".
ListIterator<File> iter = sourcefiles.listIterator();
File temp_file;
while (iter.hasNext()) {
// System.out.println(iter.next());
temp_file = iter.next();
if (!currentfiles.contains(temp_file)) //file cannot be found
{
missingcurrentfiles.add(temp_file);
}
}
}
public static void compareList2() {
//Compare the source files and current files. If not in current files, add the files to "missingsourcefiles".
ListIterator<File> iter = currentfiles.listIterator();
File temp_file;
while (iter.hasNext()) {
// System.out.println(iter.next());
temp_file = iter.next();
if (!sourcefiles.contains(temp_file)) //file cannot be found
{
missingsourcefiles.add(temp_file);
}
}
}
public static void main(String[] args) {
//Make file lists of the directory in here.
File allFiles = new File("src/bdn/files");
if (!allFiles.exists()) {
if (allFiles.mkdir()) {
System.out.println("Directory is created.");
}
}
/*Get the list of files in that directory and store the names in array*/
listOfFiles(allFiles);
/*Connect to peer*/
try {
new SocketClient().transfer();
//new TcpClient().checkForInput();
} catch (Exception e) {
System.out.println("Failed at main" + e.getMessage());
e.printStackTrace();
}
}
public void transfer(){
getPeerAddress();
// StringBuffer instr = new StringBuffer();
// String TimeStamp;
try {
/** Obtain an address object of the server */
// InetAddress address = InetAddress.getByName(host);
// System.out.println("Address of connected host:"+ address);
/** Establish a socket connection */
Socket connection = new Socket(peerAddress, port);
System.out.println("New SocketClient initialized");
getListfromPeer();
compareList1();
compareList2();
System.out.println(missingcurrentfiles);
System.out.println(missingsourcefiles);
/** Instantiate a BufferedOutputStream object */
// BufferedOutputStream bos = new BufferedOutputStream(connection.getOutputStream());
/** Instantiate an ObjectOutputStream*/
ObjectOutputStream oos = new ObjectOutputStream(connection.getOutputStream());
oos.flush();
/*
TimeStamp = new java.util.Date().toString();
String process = "Calling the Socket Server on "+ host + " port " + port +
" at " + TimeStamp + (char) 13;
*//** Write across the socket connection and flush the buffer *//*
oos.writeObject(process);
oos.flush();*/
oos.writeObject(missingsourcefiles);
oos.flush();
System.out.println("Missing files in source sent back.");
}
catch (IOException f) {
System.out.println("IOException: " + f);
}
catch (Exception g) {
System.out.println("Exception: " + g);
}
}
public void syncMissingFiles(){
//add missing files to current file list.
ListIterator<File> iter = missingcurrentfiles.listIterator();
File temp_file;
while (iter.hasNext()) {
// System.out.println(iter.next());
temp_file = iter.next();
currentfiles.add(temp_file);
}
}
public static void getPeerAddress() {
// prompt the user to enter the client's address
System.out.print("Please enter the IP address of the client :");
// open up standard input
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
// read the IP address from the command-line
try {
peerAddress = br.readLine();
} catch (IOException ioe) {
System.out.println("IO error trying to read client's IP address!");
System.exit(1);
}
System.out.println("Thanks for the client's IP address, " + peerAddress);
}
}

From what I've noticed, and I'm not an expert, you set your server to listen on port 6789 while your client connect to port 2000.
They should both work on the same port.
Try do the following in your client constructor.
SocketClient(String servername){
//while port is same as server port
peer_socket = new Socket(servername, port);
}
You can set servername in your main to be "localhost" in case you are working locally
Also, I would recommand to verify the port you are working on is not blocked by any firewall existing on your machine.

How to download a text file via FTP and read the contents to a string

This is re-worded from a previous question (which was probably a bit unclear).
I want to download a text file via FTP from a remote server, read the contents of the text file into a string and then discard the file. I don't need to actually save the file.
I am using the Apache Commons library so I have:
import org.apache.commons.net.ftp.FTPClient;
Can anyone help please, without simply redirecting me to a page with lots of possible answers on?

Not going to do the work for you, but once you have your connection established, you can call retrieveFile and pass it an OutputStream. You can google around and find the rest...
FTPClient ftp = new FTPClient();
...
ByteArrayOutputStream myVar = new ByteArrayOutputStream();
ftp.retrieveFile("remoteFileName.txt", myVar);
ByteArrayOutputStream
retrieveFile

Normally I'd leave a comment asking 'What have you tried?'. But now I'm feeling more generous :-)
Here you go:
private void ftpDownload() {
FTPClient ftp = null;
try {
ftp = new FTPClient();
ftp.connect(mServer);
try {
int reply = ftp.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply)) {
throw new Exception("Connect failed: " + ftp.getReplyString());
}
if (!ftp.login(mUser, mPassword)) {
throw new Exception("Login failed: " + ftp.getReplyString());
}
try {
ftp.enterLocalPassiveMode();
if (!ftp.setFileType(FTP.BINARY_FILE_TYPE)) {
Log.e(TAG, "Setting binary file type failed.");
}
transferFile(ftp);
} catch(Exception e) {
handleThrowable(e);
} finally {
if (!ftp.logout()) {
Log.e(TAG, "Logout failed.");
}
}
} catch(Exception e) {
handleThrowable(e);
} finally {
ftp.disconnect();
}
} catch(Exception e) {
handleThrowable(e);
}
}
private void transferFile(FTPClient ftp) throws Exception {
long fileSize = getFileSize(ftp, mFilePath);
InputStream is = retrieveFileStream(ftp, mFilePath);
downloadFile(is, buffer, fileSize);
is.close();
if (!ftp.completePendingCommand()) {
throw new Exception("Pending command failed: " + ftp.getReplyString());
}
}
private InputStream retrieveFileStream(FTPClient ftp, String filePath)
throws Exception {
InputStream is = ftp.retrieveFileStream(filePath);
int reply = ftp.getReplyCode();
if (is == null
|| (!FTPReply.isPositivePreliminary(reply)
&& !FTPReply.isPositiveCompletion(reply))) {
throw new Exception(ftp.getReplyString());
}
return is;
}
private byte[] downloadFile(InputStream is, long fileSize)
throws Exception {
byte[] buffer = new byte[fileSize];
if (is.read(buffer, 0, buffer.length)) == -1) {
return null;
}
return buffer; // <-- Here is your file's contents !!!
}
private long getFileSize(FTPClient ftp, String filePath) throws Exception {
long fileSize = 0;
FTPFile[] files = ftp.listFiles(filePath);
if (files.length == 1 && files[0].isFile()) {
fileSize = files[0].getSize();
}
Log.i(TAG, "File size = " + fileSize);
return fileSize;
}

You can just skip the download to local filesystem part and do:
FTPClient ftpClient = new FTPClient();
try {
ftpClient.connect(server, port);
ftpClient.login(user, pass);
ftpClient.enterLocalPassiveMode();
ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
InputStream inputStream = ftpClient.retrieveFileStream("/folder/file.dat");
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "Cp1252"));
while(reader.ready()) {
System.out.println(reader.readLine()); // Or whatever
}
inputStream.close();
} catch (IOException ex) {
ex.printStackTrace();
} finally {
try {
if (ftpClient.isConnected()) {
ftpClient.logout();
ftpClient.disconnect();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}