Apache commons ftpclient jar download

This method issues a PORT command to the server, indicating the other server and port to which it should connect for data transfers. You also must remember to call enterLocalActiveMode if you wish to return to the normal data connection mode. Parameters: host - The passive mode server accepting connections for data transfers. This method issues a PASV command to the server, telling it to open a data port to which the active server will connect to conduct data transfers.

The server may reply with a list of server-supported extensions. Throws: IOException - on error Since: 2. Caches the parsed response to avoid resending the command repeatedly.

Parameters: feature - the feature to check Returns: if the feature is present, returns the feature value or the empty string if the feature exists but has no value. Returns null if the feature is not found or the command failed. Check FTP. Throws: IOException - on error Since: 3. Parameters: feature - the feature to check Returns: if the feature is present, returns the feature values empty array if none Returns null if the feature is not found or the command failed.

Returns: true, if automatic server encoding detection is enabled. Returns: The current buffer size. Returns: wait time in milliseconds. See the class Javadoc section "Control channel keep-alive feature:" Returns: the number of seconds between keepalive messages.

Returns: the listener, may be null Since: 3. Parameters: pathname - The file path to query. Since: 2. If not in passive mode, returns null. Returns: The passive host name if in passive mode, otherwise null. Useful when there are multiple network cards. Returns: The local IP address in passive mode. Returns: The data port of the passive server. If not in passive mode, undefined. Returns: offset The offset into the remote file at which to start the next file transfer.

This should produce the size of the file. Parameters: pathname - the file name Returns: The size information returned by the server; null if there was an error Throws: FTPConnectionClosedException - If the FTP server prematurely closes the connection as a result of the client being idle or some other reason causing the server to send FTP reply code Returns: The status information returned by the server. This should produce a listing of the file or directory.

Parameters: pathname - the file name Returns: The status information returned by the server. This value is cached for the duration of the connection after the first call to this method. FTPClient will remember the value and return the cached value until a call to disconnect. Returns: The system type obtained from the server. Never null. Parameters: feature - the name of the feature; it is converted to upper case.

Returns: true if the feature is present, false if the feature is not present or the FTP. This method differs from using the listFiles methods in that expensive FTPFile objects are not created until needed which may be an advantage on large lists. Returns: A FTPListParseEngine object that holds the raw information and is capable of providing parsed FTPFile objects, one for each file containing information contained in the given path in the format determined by the parser parameter.

Null will be returned if a data connection cannot be opened. If the current working directory contains no files, an empty array will be the return. ParserInitializationException - Thrown if the autodetect mechanism cannot resolve the type of system we are connected with.

This information is obtained through the LIST command. The server may or may not expand glob expressions. You should avoid using glob expressions because the return format for glob listings differs from server to server and will likely cause this method to fail. Parameters: parserKey - A string representing a designated code or fully-qualified class name of an FTPFileEntryParser that should be used to parse each server file listing. ParserInitializationException - Thrown if the parserKey parameter cannot be resolved by the selected parser factory.

In the DefaultFTPEntryParserFactory, this will happen when parserKey is neither the fully qualified class name of a class implementing the interface org. FTPFileEntryParser nor a string containing one of the recognized keys mapping to such a parser or if class loader security issues prevent its being loaded.

Parameters: pathname - the path from where to MLSD. Returns: the engine. Throws: IOException - on error isRemoteVerificationEnabled public boolean isRemoteVerificationEnabled Return whether or not verification of the remote host participating in data connections is enabled.

The default behavior is for verification to be enabled. Returns: True if verification is enabled, false if not.

For recent files, the response usually contains hours and minutes not seconds. For older files, the output may only contain a date. If the server supports it, the MLSD command returns timestamps with a precision of seconds, and may include milliseconds.

See mlistDir Returns: The list of directories contained in the current directory in the format determined by the autodetection mechanism. See mlistDir Parameters: parent - the starting directory Returns: The list of directories contained in the specified directory in the format determined by the autodetection mechanism.

See mlistDir Returns: The list of file information contained in the current directory in the format determined by the autodetection mechanism. NOTE: This array may contain null members if any of the individual file listings failed to parse.

The caller should check each entry for null before referencing it. See mlistDir Parameters: pathname - The file or directory to list. Since the server may or may not expand glob expressions, using them here is not recommended and may well cause this method to fail.

Also, some servers treat a leading '-' as being an option. To avoid this interpretation, use an absolute pathname or prefix the pathname with. Some servers may support "--" as meaning end of options, in which case "-- -xyz" should work. Returns: The list of file information contained in the given path in the format determined by the autodetection mechanism Throws: FTPConnectionClosedException - If the FTP server prematurely closes the connection as a result of the client being idle or some other reason causing the server to send FTP reply code Returns: The system help string obtained from the server.

Parameters: command - The command on which to ask for help. Returns: The command help string obtained from the server. If the current directory contains no files, a zero length array is returned only if the FTP server returned a positive completion code, otherwise, null is returned the FTP server returned a error No files found. If the directory is not empty, an array of file names in the directory is returned.

Returns: The list of file names contained in the current working directory. If there are no file names in the directory, a zero-length array is returned.

This information is obtained through the NLST command. If the given pathname is a directory and contains no files, a zero length array is returned only if the FTP server returned a positive completion code, otherwise null is returned the FTP server returned a error No files found.

If the pathname corresponds to a file, only that file will be listed. Parameters: pathname - The file or directory to list. Warning: the server may treat a leading '-' as an option introducer. If so, try using an absolute path, or prefix the path with. Returns: The list of file names contained in the given path. Parameters: username - The username to login under.

If no account is required by the server, only the username and password, the account information is not used. Parameters: pathname - The pathname of the directory to create. Returns: A Calendar representing the last file modification time, may be null.

The Calendar timestamp will be null if a parse error occurs. The FTPFile timestamp will be null if a parse error occurs. Parameters: pathname - the directory name, may be null Returns: the array of file entries Throws: IOException - on error Since: 3. Parameters: pathname - the directory name, may be null filter - the filter to apply to the responses Returns: the array of file entries Throws: IOException - on error Since: 3.

Returns: The pathname of the current working directory. If it cannot be obtained, returns null. This method tells the server to which the client is connected to append to a given file on the other server.

Parameters: fileName - The name of the file to be appended to, or if the file does not exist, the name to call the file being stored. This method tells the server to which the client is connected to retrieve a given file from the other server. Parameters: fileName - The name of the file to retrieve. This method tells the server to which the client is connected to store a file on the other server using the given file name.

Parameters: fileName - The name to call the file that is to be stored. This method tells the server to which the client is connected to store a file on the other server using a unique file name. Many FTP servers require that a base file name be given from which the unique file name can be derived.

For those servers use the other version of remoteStoreUnique Returns: True if successfully completed, false if not. This method tells the server to which the client is connected to store a file on the other server using a unique file name based on the given file name. Parameters: fileName - The name on which to base the file name of the file that is to be stored. Parameters: pathname - The pathname of the directory to remove.

Parameters: from - The name of the remote file to rename. However, most FTP servers support this. Any subsequent file transfer will start reading or writing the remote file from the indicated offset. Parameters: offset - The offset into the remote file at which to start the next file transfer. If the current file type is ASCII, line separators in the file are converted to the local representation.

Note: if you have used setRestartOffset long , the file data will start from the selected offset. You must close the InputStream when you finish reading from it. The InputStream itself will take care of closing the parent data connection socket upon being closed.

Returns: An InputStream from which the remote file can be read. This is useful for preventing server timeouts. Parameters: arguments - The site specific command and arguments. Parameters: ipAddress - The external IP address of this machine. Parameters: minPort - The lowest available port inclusive. Does not affect existing connections; must be invoked before a connection is established. Parameters: autodetect - If true, automatic server encoding detection will be enabled.

Parameters: bufSize - The size of the buffer. Use a non-positive value to use the default. Parameters: timeoutMillis - number of milliseconds to wait defaults to Since: 3. See the class Javadoc section "Control channel keep-alive feature:" Parameters: controlIdleSeconds - the wait in seconds between keepalive messages. Zero or less disables. The default value if not set is null. Parameters: listener - to be used, may be null to disable Since: 3. Note: the timeout will also be applied when calling accept whilst establishing an active local data connection.

Parameters: timeoutMillis - The default timeout in milliseconds that is used when opening a data connection socket. The value 0 means an infinite timeout. The default structure is FTP. The default transfer mode FTP. This should be one of FTP.

The file type only needs to be set when you want to change the type. After changing it, the new type stays in effect until you change it again. The default file type is FTP. To ensure correct operation with all servers, always specify the appropriate file type after connecting to the server. The type should be one of FTP. The default format is FTP. A LIST -a will be issued to the ftp server. It depends on your ftp server if you need to call this method, also dont expect to get rid of hidden files if you call this method with "false".

Parameters: listHiddenFiles - true if hidden files should be listed Since: 2. It should also be in GMT, but not all servers honor this. Parameters: inetAddress - The local IP address of this machine. Parameters: ipAddress - The local IP address of this machine. If enabled, a site-local PASV mode reply address will be replaced with the remote host address to which the PASV mode request was sent unless that is also a site local address. This gets around the problem that some NAT boxes may change the reply.

The default is true, i. Parameters: enabled - true to enable replacing internal IP's in passive mode. The default implementation is NatServerResolverImpl , i.

Parameters: resolver - strategy to replace internal IP's in passive mode or null to disable the workaround i. If the value is positive, the option will be set when the data socket has been created.

Parameters: bufSize - The size of the buffer, zero or negative means the value is ignored. The default is for verification to be enabled. You may set this value at any time, whether the FTPClient is currently connected or not. Parameters: enable - True to enable verification, false to disable verification. The restart command is not sent to the server immediately.

It is sent when a data connection is created as part of a subsequent command. The restart marker is reset to zero after use. Note: This method should only be invoked immediately prior to the transfer to which it applies. This must be a value greater than or equal to zero.

Might be worth enabling in some circumstances. Parameters: selected - value to set. Parameters: remote - The name to give the remote file.

Returns: An OutputStream through which the remote file can be written. Collectives on Stack Overflow. Learn more. Asked 7 years, 5 months ago. Active 4 years, 1 month ago. Viewed times. Please help! Improve this question. GPI 8, 2 2 gold badges 31 31 silver badges 38 38 bronze badges. Amir Peivandi Amir Peivandi 4 4 silver badges 17 17 bronze badges. What concrete steps have you taken to solve this problem yourself?

When you say the downloaded file is smaller, how small is it? What is the contents of the file? Is it an empty file? I've tested this on MacOS and Windows and it's always the same result. My original file on the server is 2,, bytes and the downloaded file on MacOS is exactly the same size but the file downloaded on Windows is 2,, bytes. And this is a jar file so the downloaded file on windows is corrupted and can't be used.

Also initially I was replacing the jar file itself getting the new version and even it was woking on Mac I thought maybe this is due to writing on the same file is running in VM!

Add a comment. Active Oldest Votes. You may have misused the Apache API. So your following line : ftp. Improve this answer. You did not do what you thought you were doing. That was the issue! It's interesting how this was working fine on Mac and only the issue showed itself on Windows! Sign up or log in Sign up using Google. Sign up using Facebook.

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