Org.apache.commons.net.ftp.ftpclient download file example.Java FTP file download tutorial and example

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Find centralized, trusted content and collaborate around the technologies you use most. Connect and share knowledge within a single location that org.apache.commons.net.ftp.ftpclient download file example structured and easy to search. Org.apache.commons.net.ftp.ftpclient download file example am trying to recursively iterate through the entire root directory that I arrive at after login to the FTP server. I am able to org.apache.commons.net.ftp.ftpclient download file example, all I really want to do from there is recurse through the entire structure and and download each file org.apache.commons.net.ftp.ftpclient download file example folder and have it in the same structure as it is on the FTP.

What I have so far is a working download method, it goes to the server and gets my entire structure of files, which is brilliant, except it org.apache.commons.net.ftp.ftpclient download file example on the first attempt, http://replace.me/27893.txt works org.apache.commons.net.ftp.ftpclient download file example second time around.

The error I get is as follows:. I managed to do upload org.apache.commons.net.ftp.ftpclient download file example of a directory that I have locally, but can’t quite get downloading to work, after numerous attempts I really need some help. Your problem well, your current problem after we got rid of the. What you do is skip the dot files, see that someDir is a directory, then immediately go inside it, skip its dot files, and see someFile.

You have not created someDir locally as yet, so you get an exception. Your exception handler does not stop execution, so control goes back to the upper level of the org.apache.commons.net.ftp.ftpclient download file example. At this point it creates the directory. So next time you run your program, the local someDir directory is already created from the previous run, and you see no problem.

Stack Overflow for Teams — Start collaborating and sharing organizational knowledge. Create a free Team Why Teams? Learn more about Collectives. Learn more about Teams. Asked 8 years ago. Modified 4 посетить страницу, 6 months ago. Читать 5k times. The error I get is as follows: java. Improve this question. Martin Prikryl k 52 52 gold badges silver badges bronze badges.

Slippy Slippy 1, 4 4 gold badges 20 20 silver badges 42 42 bronze badges. What did you try and where did it fail? Added code to show перейти на страницу my current code the exact way it sits. Thanks for the fast reply by the way. Well, org.apache.commons.net.ftp.ftpclient download file example did you try not the part that is working, the part that you said you tried and failedand in what way did it fail? Helping would indeed be easier if you mentioned which part of the process gives you trouble – downloading the file when you get продолжить it?

Traversing remote directiories? Traversing la save game pc download Preserving folder structure? Well, when I had the download code inside the for loop, along with mkdirs for directory cases, I was finding that I was not getting anywhere near the structure I have in the ftp server back.

Also, what I have right now isn’t working – it doesn’t even manage to print the file or directory names correctly and I have org.apache.commons.net.ftp.ftpclient download file example no idea why. Show 8 more comments. Sorted by: Reset to default. Highest score default Trending recent votes count more Date modified newest first Date created oldest first.

So suppose you have a tree like. Basically, you should change your code to: if file. Improve this answer. RealSkeptic RealSkeptic Thanks a million for all of your help here! This has easily been the best help I have ever gotten on stack overflow, you had me working through my problem myself and making the necessary changes I needed as I went along. Rather than just being нажмите для деталей a lump of code, I learned привожу ссылку few org.apache.commons.net.ftp.ftpclient download file example new things : — Slippy.

Add a comment. Martin Prikryl Martin Prikryl k 52 52 gold badges silver badges bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook.

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WebAug 06,  · Apache Commons Net API for downloading files by FTP protocol The replace.meent class provides two methods for downloading . WebJun 01,  · 1. Download files recursively from a directory present on unix server to local directory by ftp using Java code. 1. When downloading a listed file using Apache . replace.me_PRINT_TEXT_FORMAT, replace.me_TRANSFER_MODE, and replace.me_STRUCTURE are the only supported formats, transfer modes, and file . WebNov 11,  · This is an example of how to download a File from an FTP Server, using the replace.meent Class, that encapsulates all the functionality . WebMay 08,  · Upload file using replace.meient. I am working on File Upload using Java API. I want to upload file into server by using FTPS, I found .

Find centralized, trusted content and collaborate around the technologies you use most. Connect and share knowledge within a single location that is structured and easy to search. FTPSClient when i upload file.

Following is the error. Stack Overflow for Teams — Start collaborating and sharing organizational knowledge. Create a free Team Why Teams? Learn more about Collectives.

Learn more about Teams. Upload file using org. Asked 4 years, 7 months ago. Modified 4 years, 7 months ago. Viewed 2k times. Following is the error Exception in thread “main” java. Improve this question. Darpan Sanghavi 1, 2 2 gold badges 18 18 silver badges 31 31 bronze badges. Which of these two approaches causes the error? An Exception is nice, however the stracktrace and the line number where the exception in your code occurred would be more useful.

Could you please edit your question and add both? Add a comment. Sorted by: Reset to default. Highest score default Trending recent votes count more Date modified newest first Date created oldest first. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. Browse other questions tagged java ftps or ask your own question. The Overflow Blog. Best practices to increase the speed for Next.

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WebNote: When connecting to FTPClient, some default properties need to be set. Such as. setBufferSize (int bufSize): Set the one-time read size when transferring files;. . WebAug 06,  · Apache Commons Net API for downloading files by FTP protocol The replace.meent class provides two methods for downloading . replace.me_PRINT_TEXT_FORMAT, replace.me_TRANSFER_MODE, and replace.me_STRUCTURE are the only supported formats, transfer modes, and file .
WebNote: When connecting to FTPClient, some default properties need to be set. Such as. setBufferSize (int bufSize): Set the one-time read size when transferring files;. . replace.me_PRINT_TEXT_FORMAT, replace.me_TRANSFER_MODE, and replace.me_STRUCTURE are the only supported formats, transfer modes, and file . replace.meent = new FTPSClient (ftpsProtocol, ftpsIsImplicit); ftpClient. setTrustManager (defaultTrustManager); ftpClient. configure (new FTPClientConfig(systemKey)); . WebHere are the examples of the java api replace.meveFileStream() taken from open source .
 
 

 

Apache Commons Net – Download Apache Commons Net.Org.apache.commons.net.ftp.ftpclient download file example

 

Learn more about Collectives. Learn more about Teams. Upload file using org. Asked 4 years, 7 months ago. Modified 4 years, 7 months ago. Viewed 2k times. Following is the error Exception in thread “main” java. Improve this question. Darpan Sanghavi 1, 2 2 gold badges 18 18 silver badges 31 31 bronze badges. Which of these two approaches causes the error? An Exception is nice, however the stracktrace and the line number where the exception in your code occurred would be more useful.

Could you please edit your question and add both? Your problem well, your current problem after we got rid of the. What you do is skip the dot files, see that someDir is a directory, then immediately go inside it, skip its dot files, and see someFile.

You have not created someDir locally as yet, so you get an exception. Your exception handler does not stop execution, so control goes back to the upper level of the recursion. At this point it creates the directory. So next time you run your program, the local someDir directory is already created from the previous run, and you see no problem.

Stack Overflow for Teams — Start collaborating and sharing organizational knowledge. Create a free Team Why Teams? Learn more about Collectives. Learn more about Teams. Asked 8 years ago. Modified 4 years, 6 months ago. Viewed 5k times. The error I get is as follows: java. Improve this question. Martin Prikryl k 52 52 gold badges silver badges bronze badges. Slippy Slippy 1, 4 4 gold badges 20 20 silver badges 42 42 bronze badges.

What did you try and where did it fail? Added code to show you my current code the exact way it sits. Thanks for the fast reply by the way. Well, what did you try not the part that is working, the part that you said you tried and failed , and in what way did it fail?

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. Gets how long to wait for control keep-alive message replies. Returns: wait time in milliseconds. Returns: wait time.

Gets the time to wait between sending control connection keepalive messages when processing file upload or download. See the class Javadoc section “Control channel keep-alive feature”. Note: the timeout will also be applied when calling accept whilst establishing an active local data connection. 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. Until 3. Beginning with 3. Returns: True, if the IP address from the server’s response will be used pre 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. Parameters: pathname – The file path to query. 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.

Returns: An Instant representing the last file modification time, may be null. The Instant 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. Useful when there are multiple network cards. Parameters: ipAddress – The external IP address of this machine. Parameters: minPort – The lowest available port inclusive. Since: 2. 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: timeout – number of milliseconds to wait defaults to Since: 3. Sets how long to wait for control keep-alive message replies. Parameters: timeoutMillis – number of milliseconds to wait defaults to Since: 3. Parameters: timeout – The default timeout that is used when opening a data connection socket.

The value 0 or null means an infinite timeout.

Immediately after connecting is the only real time you need to check the reply code because connect is of type void. The boolean methods return true on a successful completion reply from the FTP server and false on a reply resulting in an error condition or failure.

The methods returning a value other than boolean return a value containing the higher level data produced by the FTP command, or null if a reply resulted in an error condition or failure. If you want to access the exact FTP reply code causing a success or failure, you must call getReplyCode after a success or failure.

The only file types directly supported are FTP. Because the handling of sockets on different platforms can differ significantly, the FTPClient automatically issues a new PORT or EPRT command prior to every transfer requiring that the server connect to the client’s data port.

This ensures identical problem-free behavior on Windows, Unix, and Macintosh platforms. Additionally, for security purposes, all data connections to the client are verified to ensure that they originated from the intended party host and port. If a data connection is initiated by an unexpected party, the command will close the socket and throw an IOException.

You may disable this behavior with setRemoteVerificationEnabled. You should keep in mind that the FTP server may choose to prematurely close a connection if the client has been idle for longer than a given time period usually seconds. FTPConnectionClosedException is a subclass of IOException and therefore need not be caught separately, but if you are going to catch it separately, its catch block must appear before the more general IOException catch block.

Before disconnecting, you may check the last reply code and text with getReplyCode , getReplyString , and getReplyStrings. You may avoid server disconnections while the client is idle by periodically sending NOOP commands to the server.

Rather than list it separately for each method, we mention here that every method communicating with the server and throwing an IOException can also throw a MalformedServerReplyException , which is a subclass of IOException.

A MalformedServerReplyException will be thrown when the reply received from the server deviates enough from the protocol specification that it cannot be interpreted in a useful manner despite attempts to be as lenient as possible. The class defined in the first parameter of initateListParsing should be derived from org. YourOwnParser”, directory ; while engine. Control channel keep-alive feature : Please note: this does not apply to the methods where the user is responsible for writing or reading the data stream, i.

FTP servers know that the control connection is in use, so won’t close it through lack of activity, but it’s a lot harder for network routers to know that the control and data connections are associated with each other. Some routers may treat the control connection as idle, and disconnect it if the transfer over the data connection takes longer than the allowable idle time for the router.

One solution to this is to send a safe command i. NOOP over the control connection to reset the router’s idle timer. In such cases, the user is responsible for keeping the control connection alive if necessary. The implementation currently uses a CopyStreamListener which is passed to the Util.

This keep-alive feature is optional; if it does not help or causes problems then don’t use it. If defined, the value will be used to create any automatically created parsers. If defined, the value will be used if the SYST command fails. For example: Fields inherited from class org. OutputStream appendFileStream String remote Returns an OutputStream through which data can be written to append to a file on the server with the given name. String [] doCommandAsStrings String command, String params Issue a command and wait for the reply, returning it as an array of strings.

String featureValue String feature Queries the server for a supported feature, and returns the its value if any. String [] featureValues String feature Queries the server for a supported feature, and returns its values if any.

Duration getControlKeepAliveTimeoutDuration Gets the time to wait between sending control connection keepalive messages when processing file upload or download. Duration getDataTimeout Gets the timeout to use when reading from the data connection.

String getPassiveHost Returns the hostname or IP address in the form of a string returned by the server when entering passive mode. String getSystemName Deprecated. FTPFile [] listDirectories Using the default system autodetect mechanism, obtain a list of directories contained in the current working directory. FTPFile [] listDirectories String parent Using the default system autodetect mechanism, obtain a list of directories contained in the specified directory.

FTPFile [] listFiles Using the default system autodetect mechanism, obtain a list of file information for the current working directory. FTPFile [] listFiles String pathname Using the default system autodetect mechanism, obtain a list of file information for the current working directory or for just a single file. String listHelp Fetches the system help information from the server and returns the full string.

String listHelp String command Fetches the help information for a given command from the server and returns the full string. String [] listNames Obtain a list of file names in the current working directory This information is obtained through the NLST command.

String [] listNames String pathname Obtain a list of file names in a directory or just the name of a given file, which is not particularly useful. Use setDataTimeout Duration. OutputStream storeFileStream String remote Returns an OutputStream through which data can be written to store a file on the server using the given name. OutputStream storeUniqueFileStream Returns an OutputStream through which data can be written to store a file on the server using a unique name assigned by the server.

OutputStream storeUniqueFileStream String remote Returns an OutputStream through which data can be written to store a file on the server using a unique name derived from the given name. Methods inherited from class org. Since: 3. This property, if present, configures the default for the following: If the client receives the servers response for a PASV request, then that response will contain an IP address. If this property is true, then the client will use that IP address, as requested by the server.

This is compatible to version 3. If this property is false, or absent, then the client will ignore that IP address, and instead use the remote address of the control connection.

This is the default data connection mode when and FTPClient instance is created. Initializes FTP. If a restart offset has been set with setRestartOffset long , a REST command is issued to the server with the offset as an argument before establishing the data connection. Active mode connections also cause a local PORT command to be issued. Parameters: command – The int representation of the FTP command to send. If this parameter is set to null, then the command is sent with no argument.

Returns: A Socket corresponding to the established data connection. Null is returned if an FTP protocol error is reported at any point during the establishment and initialization of the connection. Parameters: command – The text representation of the FTP command to send.

Returns: True if successfully completed, false if not. This exception may be caught either as an IOException or independently as itself. Parameters: bytes – The number of bytes which the server should allocate.

Parameters: remote – The name of the remote file. The CopyStreamException allows you to determine the number of bytes transferred and the IOException causing the error. You must close the OutputStream when you finish writing to it.

The OutputStream itself will take care of closing the parent data connection socket upon being closed. To finalize the file transfer you must call completePendingCommand and check its return value to verify success.

If this is not done, subsequent commands may behave unexpectedly. Returns: An OutputStream through which the remote file can be appended. If the data connection cannot be opened e. Parameters: pathname – The new current working directory. These commands require some action by the programmer after the reception of a positive intermediate command.

After the programmer’s code completes its actions, it must call this method to receive the completion reply from the server and verify the success of the entire transaction.

In the case of this class, configuring merely makes the config object available for the factory methods that construct parsers.

Specified by: configure in interface Configurable Parameters: config – FTPClientConfig object used to provide non-standard configurations to the parser. Since: 1. Parameters: pathname – The pathname of the file to be deleted. Parameters: command – The command to invoke params – The parameters string, may be null Returns: True if successfully completed, false if not, in which case call FTP. Parameters: command – The command to invoke params – The parameters string, may be null Returns: The array of replies, or null if the command failed, in which case call FTP.

No communication with the FTP server is conducted, but this causes all future data transfers to require the FTP server to connect to the client’s data port. Additionally, to accommodate differences between socket implementations on different platforms, this method causes the client to issue a PORT command before every data transfer. Use this method only for data transfers between the client and server. This method causes a PASV or EPSV command to be issued to the server before the opening of every data connection, telling the server to open a data port to which the client will connect to conduct data transfers.

Use this method only for server to server data transfers. 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.

WebNote: When connecting to FTPClient, some default properties need to be set. Such as. setBufferSize (int bufSize): Set the one-time read size when transferring files;. . WebHere are the examples of the java api replace.meveFileStream() taken from open source . replace.meent = new FTPSClient (ftpsProtocol, ftpsIsImplicit); ftpClient. setTrustManager (defaultTrustManager); ftpClient. configure (new FTPClientConfig(systemKey)); . WebMay 08,  · Upload file using replace.meient. I am working on File Upload using Java API. I want to upload file into server by using FTPS, I found . replace.me_PRINT_TEXT_FORMAT, replace.me_TRANSFER_MODE, and replace.me_STRUCTURE are the only supported formats, transfer modes, and file .

Learn more about Teams. Upload file using org. Asked 4 years, 7 months ago. Modified 4 years, 7 months ago. Viewed 2k times. Following is the error Exception in thread “main” java. Improve this question. Darpan Sanghavi 1, 2 2 gold badges 18 18 silver badges 31 31 bronze badges.

Which of these two approaches causes the error? An Exception is nice, however the stracktrace and the line number where the exception in your code occurred would be more useful. Could you please edit your question and add both? Add a comment. Asked 8 years ago. Modified 4 years, 6 months ago. Viewed 5k times. The error I get is as follows: java. Improve this question.

Martin Prikryl k 52 52 gold badges silver badges bronze badges. Slippy Slippy 1, 4 4 gold badges 20 20 silver badges 42 42 bronze badges. What did you try and where did it fail? Added code to show you my current code the exact way it sits. Thanks for the fast reply by the way. Well, what did you try not the part that is working, the part that you said you tried and failed , and in what way did it fail?

Helping would indeed be easier if you mentioned which part of the process gives you trouble – downloading the file when you get to it? Traversing remote directiories?

Traversing recursively? Preserving folder structure? Well, when I had the download code inside the for loop, along with mkdirs for directory cases, I was finding that I was not getting anywhere near the structure I have in the ftp server back.

Also, what I have right now isn’t working – it doesn’t even manage to print the file or directory names correctly and I have absolutely no idea why. Show 8 more comments.

Sorted by: Reset to default. Highest score default Trending recent votes count more Date modified newest first Date created oldest first. So suppose you have a tree like. 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. Useful when there are multiple network cards. Parameters: ipAddress – The external IP address of this machine. Parameters: minPort – The lowest available port inclusive. Since: 2. 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: timeout – number of milliseconds to wait defaults to Since: 3. Sets how long to wait for control keep-alive message replies. Parameters: timeoutMillis – number of milliseconds to wait defaults to Since: 3. Parameters: timeout – The default timeout that is used when opening a data connection socket. The value 0 or null means an infinite timeout.

Sets the timeout in milliseconds to use when reading from the data connection. The type 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 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. The timestamp should be in the form yyyyMMDDhhmmss.

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. 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. 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. 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. Parameters: local – The local InputStream from which to read the file.

Parameters: remote – The name on which to base the unique name given to the remote file. Parameters: pathname – The pathname to mount. All rights reserved. Skip navigation links. Object org. SocketClient org. FTP org. This class takes care of all low level details of interacting with an FTP server and provides a convenient higher level interface. As with all classes derived from SocketClient , you must first connect to the server with connect before doing anything, and finally disconnect after you’re completely finished interacting with the server.

Then you need to check the FTP reply code to see if the connection was successful. A constant indicating the FTP session is expecting all transfers to occur between the client local and server and that the server should connect to the client’s data port to initiate a data transfer. A constant indicating the FTP session is expecting all transfers to occur between two remote servers and that the server the client is connected to should connect to the other server’s data port to initiate a data transfer.

The system property “org. A constant indicating the FTP session is expecting all transfers to occur between the client local and server and that the server is in passive mode, requiring the client to connect to the server’s data port to initiate a transfer.

A constant indicating the FTP session is expecting all transfers to occur between two remote servers and that the server the client is connected to is in passive mode, requiring the other server to connect to the first server’s data port to initiate a data transfer. For example:. Establishes a data connection with the FTP server, returning a Socket for the connection if successful. Appends to a file on the server with the given name, taking input from the given InputStream.

Returns an OutputStream through which data can be written to append to a file on the server with the given name. Implementation of the Configurable interface. Closes the connection to the FTP server and restores connection parameters to the default values. Returns the hostname or IP address in the form of a string returned by the server when entering passive mode. Using the default autodetect mechanism, initialize an FTPListParseEngine object containing a raw file information for the current working directory on the server This information is obtained through the LIST command.

Using the default autodetect mechanism, initialize an FTPListParseEngine object containing a raw file information for the supplied directory. Using the supplied parser key, initialize an FTPListParseEngine object containing a raw file information for the supplied directory. Return whether or not verification of the remote host participating in data connections is enabled. Using the default system autodetect mechanism, obtain a list of directories contained in the current working directory.

Using the default system autodetect mechanism, obtain a list of directories contained in the specified directory. Using the default system autodetect mechanism, obtain a list of file information for the current working directory.

Using the default system autodetect mechanism, obtain a list of file information for the current working directory or for just a single file. Version of listFiles String which allows a filter to be provided. Fetches the help information for a given command from the server and returns the full string. Obtain a list of file names in the current working directory This information is obtained through the NLST command. Obtain a list of file names in a directory or just the name of a given file, which is not particularly useful.

Creates a new subdirectory on the FTP server in the current directory if a relative pathname is given or where specified if an absolute pathname is given.

Sets the time to wait between sending control connection keepalive messages when processing file upload or download.

You can set this to true if you would like to get hidden files when listFiles too. Enable or disable verification that the remote host taking part of a data connection is the same as the host to which the control connection is attached.

Stores a file on the server using the given name and taking input from the given InputStream. Returns an OutputStream through which data can be written to store a file on the server using the given name. Stores a file on the server using a unique name assigned by the server and taking input from the given InputStream.

Stores a file on the server using a unique name derived from the given name and taking input from the given InputStream. Returns an OutputStream through which data can be written to store a file on the server using a unique name assigned by the server.

Returns an OutputStream through which data can be written to store a file on the server using a unique name derived from the given name. Default FTPClient constructor.

Description copied from class: FTP. Initiates control connections and gets initial reply. Issue a command and wait for the reply. Issue a command and wait for the reply, returning it as an array of strings. Queries the server for supported features. Queries the server for a supported feature, and returns the its value if any. Queries the server for a supported feature, and returns its values if any.

Get the CSL debug array. Gets the timeout to use when reading from the data connection. If not in passive mode, returns null. Set the local IP address in passive mode.

replace.meent = new FTPSClient (ftpsProtocol, ftpsIsImplicit); ftpClient. setTrustManager (defaultTrustManager); ftpClient. configure (new FTPClientConfig(systemKey)); . WebAug 06,  · Apache Commons Net API for downloading files by FTP protocol The replace.meent class provides two methods for downloading . WebNov 11,  · This is an example of how to download a File from an FTP Server, using the replace.meent Class, that encapsulates all the functionality . WebNote: When connecting to FTPClient, some default properties need to be set. Such as. setBufferSize (int bufSize): Set the one-time read size when transferring files;. . replace.me_PRINT_TEXT_FORMAT, replace.me_TRANSFER_MODE, and replace.me_STRUCTURE are the only supported formats, transfer modes, and file .

Your exception handler does not stop execution, so control goes back to the upper level of the recursion. At this point it creates the directory. So next time you run your program, the local someDir directory is already created from the previous run, and you see no problem. Stack Overflow for Teams — Start collaborating and sharing organizational knowledge.

Create a free Team Why Teams? Learn more about Collectives. Learn more about Teams. Asked 8 years ago. Modified 4 years, 6 months ago. Viewed 5k times. The error I get is as follows: java. Improve this question. Martin Prikryl k 52 52 gold badges silver badges bronze badges. Slippy Slippy 1, 4 4 gold badges 20 20 silver badges 42 42 bronze badges. What did you try and where did it fail?

Added code to show you my current code the exact way it sits. Thanks for the fast reply by the way. Well, what did you try not the part that is working, the part that you said you tried and failed , and in what way did it fail? Helping would indeed be easier if you mentioned which part of the process gives you trouble – downloading the file when you get to it?

Traversing remote directiories? Traversing recursively? 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. Parameters: pathname – The file path to query. 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. Returns: An Instant representing the last file modification time, may be null. The Instant 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.

Useful when there are multiple network cards. Parameters: ipAddress – The external IP address of this machine. Parameters: minPort – The lowest available port inclusive. Since: 2. 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: timeout – number of milliseconds to wait defaults to Since: 3. Sets how long to wait for control keep-alive message replies. Parameters: timeoutMillis – number of milliseconds to wait defaults to Since: 3.

Parameters: timeout – The default timeout that is used when opening a data connection socket. The value 0 or null means an infinite timeout. Sets the timeout in milliseconds to use when reading from the data connection. The type 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 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. The timestamp should be in the form yyyyMMDDhhmmss. 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. 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. 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. 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.

Parameters: local – The local InputStream from which to read the file. Parameters: remote – The name on which to base the unique name given to the remote file. Parameters: pathname – The pathname to mount. All rights reserved. Skip navigation links. Object org. SocketClient org. FTP org. This class takes care of all low level details of interacting with an FTP server and provides a convenient higher level interface.

As with all classes derived from SocketClient , you must first connect to the server with connect before doing anything, and finally disconnect after you’re completely finished interacting with the server.

Then you need to check the FTP reply code to see if the connection was successful. A constant indicating the FTP session is expecting all transfers to occur between the client local and server and that the server should connect to the client’s data port to initiate a data transfer. A constant indicating the FTP session is expecting all transfers to occur between two remote servers and that the server the client is connected to should connect to the other server’s data port to initiate a data transfer.

The system property “org. A constant indicating the FTP session is expecting all transfers to occur between the client local and server and that the server is in passive mode, requiring the client to connect to the server’s data port to initiate a transfer. A constant indicating the FTP session is expecting all transfers to occur between two remote servers and that the server the client is connected to is in passive mode, requiring the other server to connect to the first server’s data port to initiate a data transfer.

For example:. Establishes a data connection with the FTP server, returning a Socket for the connection if successful. Appends to a file on the server with the given name, taking input from the given InputStream. Returns an OutputStream through which data can be written to append to a file on the server with the given name.

Implementation of the Configurable interface. Closes the connection to the FTP server and restores connection parameters to the default values. Returns the hostname or IP address in the form of a string returned by the server when entering passive mode.

Using the default autodetect mechanism, initialize an FTPListParseEngine object containing a raw file information for the current working directory on the server This information is obtained through the LIST command.

Using the default autodetect mechanism, initialize an FTPListParseEngine object containing a raw file information for the supplied directory. Using the supplied parser key, initialize an FTPListParseEngine object containing a raw file information for the supplied directory.

Return whether or not verification of the remote host participating in data connections is enabled. Using the default system autodetect mechanism, obtain a list of directories contained in the current working directory. Using the default system autodetect mechanism, obtain a list of directories contained in the specified directory.

Using the default system autodetect mechanism, obtain a list of file information for the current working directory. Using the default system autodetect mechanism, obtain a list of file information for the current working directory or for just a single file. Version of listFiles String which allows a filter to be provided. Fetches the help information for a given command from the server and returns the full string.

Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. Browse other questions tagged java ftps or ask your own question. The Overflow Blog. Best practices to increase the speed for Next. Help us identify new roles for community members. Navigation and UI research starting soon. Temporary policy: ChatGPT is banned. I’m standing down as a moderator.

Connect and share knowledge within a single location that is structured and easy to search. FTPSClient when i upload file. Following is the error. Stack Overflow for Teams — Start collaborating and sharing organizational knowledge. Create a free Team Why Teams? Learn more about Collectives. Learn more about Teams. Upload file using org. Asked 4 years, 7 months ago. Modified 4 years, 7 months ago. Viewed 2k times.

Following is the error Exception in thread “main” java. Improve this question. Darpan Sanghavi 1, 2 2 gold badges 18 18 silver badges 31 31 bronze badges. Which of these two approaches causes the error?

An Exception is nice, however the stracktrace and the line number where the exception in your code occurred would be more useful. Could you please edit your question and add both? Add a comment. Traversing remote directiories? Traversing recursively? Preserving folder structure? Well, when I had the download code inside the for loop, along with mkdirs for directory cases, I was finding that I was not getting anywhere near the structure I have in the ftp server back.

Also, what I have right now isn’t working – it doesn’t even manage to print the file or directory names correctly and I have absolutely no idea why. Show 8 more comments. Sorted by: Reset to default. Highest score default Trending recent votes count more Date modified newest first Date created oldest first. So suppose you have a tree like.

Basically, you should change your code to: if file. Improve this answer. RealSkeptic RealSkeptic Thanks a million for all of your help here! This has easily been the best help I have ever gotten on stack overflow, you had me working through my problem myself and making the necessary changes I needed as I went along. Rather than just being given a lump of code, I learned a few neat new things : — Slippy. Add a comment. Martin Prikryl Martin Prikryl k 52 52 gold badges silver badges bronze badges.

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Долгая история. Чутье подсказывало Беккеру, что это открытие не сулит ему ничего хорошего. – Все равно расскажите. ГЛАВА 15 Сьюзан Флетчер расположилась за компьютерным терминалом Третьего узла.

 
 

Hot How-to.Org.apache.commons.net.ftp.ftpclient download file example

 
 

The error I get is as follows:. I managed to do upload functionality of a directory that I have locally, but can’t quite get downloading to work, after numerous attempts I really need some help. Your problem well, your current problem after we got rid of the. What you do is skip the dot files, see that someDir is a directory, then immediately go inside it, skip its dot files, and see someFile. You have not created someDir locally as yet, so you get an exception.

Your exception handler does not stop execution, so control goes back to the upper level of the recursion. At this point it creates the directory. So next time you run your program, the local someDir directory is already created from the previous run, and you see no problem.

Stack Overflow for Teams — Start collaborating and sharing organizational knowledge. Create a free Team Why Teams? Learn more about Collectives. Learn more about Teams. Asked 8 years ago. Modified 4 years, 6 months ago. Viewed 5k times. The error I get is as follows: java.

Improve this question. Martin Prikryl k 52 52 gold badges silver badges bronze badges. Slippy Slippy 1, 4 4 gold badges 20 20 silver badges 42 42 bronze badges. What did you try and where did it fail? Added code to show you my current code the exact way it sits. Thanks for the fast reply by the way. Well, what did you try not the part that is working, the part that you said you tried and failed , and in what way did it fail? Helping would indeed be easier if you mentioned which part of the process gives you trouble – downloading the file when you get to it?

Traversing remote directiories? Traversing recursively? Preserving folder structure? Well, when I had the download code inside the for loop, along with mkdirs for directory cases, I was finding that I was not getting anywhere near the structure I have in the ftp server back. Also, what I have right now isn’t working – it doesn’t even manage to print the file or directory names correctly and I have absolutely no idea why. Show 8 more comments.

Sorted by: Reset to default. Highest score default Trending recent votes count more Date modified newest first Date created oldest first. Returns: A Socket corresponding to the established data connection. Null is returned if an FTP protocol error is reported at any point during the establishment and initialization of the connection. Parameters: command – The text representation of the FTP command to send.

Returns: True if successfully completed, false if not. This exception may be caught either as an IOException or independently as itself. Parameters: bytes – The number of bytes which the server should allocate. Parameters: remote – The name of the remote file. The CopyStreamException allows you to determine the number of bytes transferred and the IOException causing the error. You must close the OutputStream when you finish writing to it.

The OutputStream itself will take care of closing the parent data connection socket upon being closed. To finalize the file transfer you must call completePendingCommand and check its return value to verify success. If this is not done, subsequent commands may behave unexpectedly. Returns: An OutputStream through which the remote file can be appended. If the data connection cannot be opened e.

Parameters: pathname – The new current working directory. These commands require some action by the programmer after the reception of a positive intermediate command.

After the programmer’s code completes its actions, it must call this method to receive the completion reply from the server and verify the success of the entire transaction.

In the case of this class, configuring merely makes the config object available for the factory methods that construct parsers. Specified by: configure in interface Configurable Parameters: config – FTPClientConfig object used to provide non-standard configurations to the parser. Since: 1.

Parameters: pathname – The pathname of the file to be deleted. Parameters: command – The command to invoke params – The parameters string, may be null Returns: True if successfully completed, false if not, in which case call FTP.

Parameters: command – The command to invoke params – The parameters string, may be null Returns: The array of replies, or null if the command failed, in which case call FTP. No communication with the FTP server is conducted, but this causes all future data transfers to require the FTP server to connect to the client’s data port.

Additionally, to accommodate differences between socket implementations on different platforms, this method causes the client to issue a PORT command before every data transfer. Use this method only for data transfers between the client and server.

This method causes a PASV or EPSV command to be issued to the server before the opening of every data connection, telling the server to open a data port to which the client will connect to conduct data transfers. Use this method only for server to server data transfers. 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.

Gets how long to wait for control keep-alive message replies. Returns: wait time in milliseconds. Returns: wait time. Gets the time to wait between sending control connection keepalive messages when processing file upload or download.

See the class Javadoc section “Control channel keep-alive feature”. Note: the timeout will also be applied when calling accept whilst establishing an active local data connection. 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. Until 3. Beginning with 3. Returns: True, if the IP address from the server’s response will be used pre 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. Parameters: pathname – The file path to query. 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. Returns: An Instant representing the last file modification time, may be null. The Instant 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.

Useful when there are multiple network cards. Parameters: ipAddress – The external IP address of this machine. Parameters: minPort – The lowest available port inclusive. Since: 2. 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: timeout – number of milliseconds to wait defaults to Since: 3. Sets how long to wait for control keep-alive message replies. Parameters: timeoutMillis – number of milliseconds to wait defaults to Since: 3.

Parameters: timeout – The default timeout that is used when opening a data connection socket. The value 0 or null means an infinite timeout. Sets the timeout in milliseconds to use when reading from the data connection. The type 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 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. The timestamp should be in the form yyyyMMDDhhmmss. 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.

Viewed 2k times. Following is the error Exception in thread “main” java. Improve this question. Darpan Sanghavi 1, 2 2 gold badges 18 18 silver badges 31 31 bronze badges.

Which of these two approaches causes the error? An Exception is nice, however the stracktrace and the line number where the exception in your code occurred would be more useful. Could you please edit your question and add both? Add a comment. Sorted by: Reset to default. Highest score default Trending recent votes count more Date modified newest first Date created oldest first. Sign up or log in Sign up using Google. Sign up using Facebook.

You have not created someDir locally as yet, so you get an exception. Your exception handler does not stop execution, so control goes back to the upper level of the recursion.

At this point it creates the directory. So next time you run your program, the local someDir directory is already created from the previous run, and you see no problem. Stack Overflow for Teams — Start collaborating and sharing organizational knowledge. Create a free Team Why Teams? Learn more about Collectives. Learn more about Teams. Asked 8 years ago. Modified 4 years, 6 months ago. Viewed 5k times. The error I get is as follows: java. Improve this question. Martin Prikryl k 52 52 gold badges silver badges bronze badges.

Slippy Slippy 1, 4 4 gold badges 20 20 silver badges 42 42 bronze badges. What did you try and where did it fail? Added code to show you my current code the exact way it sits. Thanks for the fast reply by the way. Well, what did you try not the part that is working, the part that you said you tried and failed , and in what way did it fail?

Helping would indeed be easier if you mentioned which part of the process gives you trouble – downloading the file when you get to it? Traversing remote directiories? 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. Parameters: pathname – The file path to query. 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. Returns: An Instant representing the last file modification time, may be null. The Instant 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. Useful when there are multiple network cards. Parameters: ipAddress – The external IP address of this machine.

Parameters: minPort – The lowest available port inclusive. Since: 2. 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: timeout – number of milliseconds to wait defaults to Since: 3. Sets how long to wait for control keep-alive message replies.

Parameters: timeoutMillis – number of milliseconds to wait defaults to Since: 3. Parameters: timeout – The default timeout that is used when opening a data connection socket. The value 0 or null means an infinite timeout.

Sets the timeout in milliseconds to use when reading from the data connection. The type 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 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. The timestamp should be in the form yyyyMMDDhhmmss. 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. 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.

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. 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. Parameters: local – The local InputStream from which to read the file. Parameters: remote – The name on which to base the unique name given to the remote file.

Parameters: pathname – The pathname to mount. All rights reserved. Skip navigation links. Object org. SocketClient org. FTP org. This class takes care of all low level details of interacting with an FTP server and provides a convenient higher level interface. As with all classes derived from SocketClient , you must first connect to the server with connect before doing anything, and finally disconnect after you’re completely finished interacting with the server.

Then you need to check the FTP reply code to see if the connection was successful. A constant indicating the FTP session is expecting all transfers to occur between the client local and server and that the server should connect to the client’s data port to initiate a data transfer.

A constant indicating the FTP session is expecting all transfers to occur between two remote servers and that the server the client is connected to should connect to the other server’s data port to initiate a data transfer. The system property “org. A constant indicating the FTP session is expecting all transfers to occur between the client local and server and that the server is in passive mode, requiring the client to connect to the server’s data port to initiate a transfer.

A constant indicating the FTP session is expecting all transfers to occur between two remote servers and that the server the client is connected to is in passive mode, requiring the other server to connect to the first server’s data port to initiate a data transfer.

For example:. Establishes a data connection with the FTP server, returning a Socket for the connection if successful. Appends to a file on the server with the given name, taking input from the given InputStream.

Which of these two approaches causes the error? An Exception is nice, however the stracktrace and the line number where the exception in your code occurred would be more useful. Could you please edit your question and add both?

Add a comment. Sorted by: Reset to default. Highest score default Trending recent votes count more Date modified newest first Date created oldest first. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.

Browse other questions tagged java ftps or ask your own question. The Overflow Blog. Best practices to increase the speed for Next. Help us identify new roles for community members. Navigation and UI research starting soon. Temporary policy: ChatGPT is banned. I’m standing down as a moderator. The error I get is as follows:. I managed to do upload functionality of a directory that I have locally, but can’t quite get downloading to work, after numerous attempts I really need some help.

Your problem well, your current problem after we got rid of the. What you do is skip the dot files, see that someDir is a directory, then immediately go inside it, skip its dot files, and see someFile.

You have not created someDir locally as yet, so you get an exception. Your exception handler does not stop execution, so control goes back to the upper level of the recursion. At this point it creates the directory. So next time you run your program, the local someDir directory is already created from the previous run, and you see no problem. Stack Overflow for Teams — Start collaborating and sharing organizational knowledge.

Create a free Team Why Teams? Learn more about Collectives. Learn more about Teams. Asked 8 years ago. Modified 4 years, 6 months ago. Viewed 5k times. The error I get is as follows: java. Improve this question. Martin Prikryl k 52 52 gold badges silver badges bronze badges. Slippy Slippy 1, 4 4 gold badges 20 20 silver badges 42 42 bronze badges.

What did you try and where did it fail? Added code to show you my current code the exact way it sits. Thanks for the fast reply by the way. Well, what did you try not the part that is working, the part that you said you tried and failed , and in what way did it fail?

Helping would indeed be easier if you mentioned which part of the process gives you trouble – downloading the file when you get to it? Traversing remote directiories? Traversing recursively? Preserving folder structure? Well, when I had the download code inside the for loop, along with mkdirs for directory cases, I was finding that I was not getting anywhere near the structure I have in the ftp server back.

Also, what I have right now isn’t working – it doesn’t even manage to print the file or directory names correctly and I have absolutely no idea why. Show 8 more comments. Sorted by: Reset to default. Highest score default Trending recent votes count more Date modified newest first Date created oldest first.

WebNote: When connecting to FTPClient, some default properties need to be set. Such as. setBufferSize (int bufSize): Set the one-time read size when transferring files;. . WebJun 01,  · 1. Download files recursively from a directory present on unix server to local directory by ftp using Java code. 1. When downloading a listed file using Apache . WebAug 06,  · Apache Commons Net API for downloading files by FTP protocol The replace.meent class provides two methods for downloading . WebHere are the examples of the java api replace.meveFileStream() taken from open source .

По-видимому, Стратмор проверял свой план с помощью программы «Мозговой штурм». Если кто-то имеет возможность читать его электронную почту, то и остальная информация на его компьютере становится доступной… – Переделка «Цифровой крепости» – чистое безумие! – кричал Хейл.  – Ты отлично понимаешь, что это за собой влечет – полный доступ АНБ к любой информации.  – Сирена заглушала его слова, но Хейл старался ее перекричать.  – Ты считаешь, что мы готовы взять на себя такую ответственность.