Develop Reference

Error when connecting to FTP using apache commons

I am using apache common library for connecting to FTP with Android app.
Now I want to upload a file from internal storage to FTP server and I get this reply from getReplyString() method.
And I get this msg
553 Can't open that file: Permission denied
//Write file to the internal storage
String path = "/sdcard/";
File file = new File(path, fileName);
FileOutputStream stream = null;
try {
stream = new FileOutputStream(file);
stream.write(jsonObject.toString().getBytes());
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
stream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
// Read the file from resources folder.
try {
File file1 = new File(path, fileName);
Log.d("path",file1.getPath());
BufferedInputStream in = new BufferedInputStream (new FileInputStream (file1.getPath()));
client.connect(FTPHost);
client.login(FTPUserName, FTPPassword);
client.enterLocalPassiveMode();
client.setFileType(FTP.BINARY_FILE_TYPE);
// Store file to server
Log.d("reply",client.getReplyString());
boolean res = client.storeFile("/"+fileName, in);
Log.d("reply",client.getReplyString());
Log.d("result",res+"");
client.logout();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
client.disconnect();
} catch (IOException e) {
e.printStackTrace();
}
}

Delete file after Dropbox transfer fails

I try to use the official Dropbox API for uploading a zip file to my account. My project is a desktop application (standard Java). My code looks like this:
public void uploadZipFile(File file) throws Exception {
FileInputStream fis = new FileInputStream(file);
try {
getClient(accessToken).uploadFile("/" + file.getName(), DbxWriteMode.add(), file.length(), fis);
} finally {
fis.close();
}
}
private DbxClient getClient(String accessToken) {
DbxRequestConfig dbxRequestConfig = new DbxRequestConfig(Constants.APP_NAME, Locale.getDefault().toString());
return new DbxClient(dbxRequestConfig, accessToken);
}
And I call it:
File zipFile = new File("C:\\Test\\MyFile.zip");
try {
uploadZipFile(zipFile);
} catch (Exception e) {
e.printStackTrace();
}
The file is transferred without any problems but then I want to delete the file after synchronization:
File zipFile = new File("C:\\Test\\MyFile.zip");
try {
uploadZipFile(zipFile);
System.out.println(zipFile.delete());
} catch (Exception e) {
e.printStackTrace();
}
The file is transferred successfully again, but the file still exists in the local file system and the delete method returns false.

Android dropbox upload/download app to an SD card

I'm trying to make an app that uploads a file to dropbox and downloads it.
Uploading seems to work, downloading doesn't. Also it doesn't actually upload from my SD card but from my phone internal memory.
saveOnDropbox() uploads a file.txt from phone/MyFiles/file.txt to dropbox app folder.
saveOnDevice() - something happens when I use this, but the file doesn't get neither to my phone or SD card
public void saveOnDropBox() throws IOException, DropboxException {
File sdCard = Environment.getExternalStorageDirectory();
File file = new File(sdCard.getAbsolutePath() + "/MyFiles/file.txt");
FileInputStream inputStream = new FileInputStream(file);
DropboxAPI.Entry response = dropboxAPI.putFile("/file.txt", inputStream,
file.length(), null, null);
Log.i("D bExam pleLog", "The uploaded file's rev is: " + response.rev);
}
public void saveOnDevice() {
FileOutputStream outputStream = null;
try {
File sdCard = Environment.getExternalStorageDirectory();
File file = new File(sdCard.getAbsolutePath() + "/MyFiles/file.txt");
outputStream = new FileOutputStream(file);
DropboxAPI.DropboxFileInfo info = dropboxAPI.getFile("/file.txt", null, outputStream, null);
} catch (Exception e) {
System.out.println("Som ething w ent w rong: " + e);
} finally {
if (outputStream != null) {
try {
outputStream.close();
} catch (IOException e) {
System.out.println("___" + e);
}
}
}
}}
Appreciate any help.

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..

Downloading files(.zip, .jar,...) to a folder

I have been trying many ways of downloading a file from a URL and putting it in a folder.
public static void saveFile(String fileName,String fileUrl) throws MalformedURLException, IOException {
FileUtils.copyURLToFile(new URL(fileUrl), new File(fileName));
}
boolean success = (new File("File")).mkdirs();
if (!success) {
Status.setText("Failed");
}
try {
saveFile("DownloadedFileName", "ADirectDownloadLinkForAFile");
} catch (MalformedURLException ex) {
Status.setText("MalformedURLException");
Logger.getLogger(DownloadFile.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Status.setText("IOException Error");
Logger.getLogger(DownloadFile.class.getName()).log(Level.SEVERE, null, ex);
}
I found this code on the net, am i using it correctly?
If i did:
saveFile("FolderName", "ADirectDownloadLinkForAFile")
I would get IOException error
What I want my code to do is:
Create folder
Download file
Downloaded file to go to the just created folder
I'm a newbie here sorry. Please help

There are various ways in java to download a file from the internet.
The easiest one is to use a buffer and a stream:
File theDir = new File("new folder");
// if the directory does not exist, create it
if (!theDir.exists())
{
System.out.println("creating directory: " + directoryName);
boolean result = theDir.mkdir();
if(result){
System.out.println("DIR created");
}
}
FileOutputStream out = new FileOutputStream(new File(theDir.getAbsolutePath() +"filename"));
BufferedInputStream in = new BufferedInputStream(new URL("URLtoYourFIle").openStream());
byte data[] = new byte[1024];
int count;
while((count = in.read(data,0,1024)) != -1)
{
out.write(data, 0, count);
}
Just the basic concept. Dont forget the close the streams ;)

The File.mkdirs() statement appears to be creating a folder called Files, but the saveFile() method doesn't appear to be using this, and simply saving the file in the current directory.