Commercial File Transfer Protocol (FTP) Component.
The proxy scheme used by your FTP proxy server. Valid values are 0 to 6. The default value is 0 which indicates that no proxy server is used. Supported proxy methods are as follows:
Note: The ProxyHostname is the hostname of the firewall, if the proxy is a firewall. Also, the ProxyUsername and ProxyPassword are the firewall username/password (if the proxy is a firewall).
ProxyMethod = 1 (SITE site)
USER ProxyUsername
PASS ProxyPassword
SITE Hostname
USER Username
PASS Password
ProxyMethod = 2 (USER user@site)
USER Username@Hostname:Port
PASS Password
ProxyMethod = 3 (USER with login)
USER ProxyUsername
PASS ProxyPassword
USER Username@Hostname:Port
PASS Password
ProxyMethod = 4 (USER/PASS/ACCT)
USER Username@Hostname:Port ProxyUsername
PASS Password
ACCT ProxyPassword
ProxyMethod = 5 (OPEN site)
USER ProxyUsername
PASS ProxyPassword
OPEN Hostname
USER Username
PASS Password
ProxyMethod = 6 (firewallId@site)
USER ProxyUsername@Hostname
USER Username
PASS Password
public string ProxyPassword {get; set; }
The password for authenticating with the FTP proxy server.
public int ProxyPort {get; set; }
If an FTP proxy server is used, this is the port number at which the proxy server is listening for connections.
public string ProxyUsername {get; set; }
The username for authenticating with the FTP proxy server.
public int ReadTimeout {get; set; }
Maximum number of seconds to wait when reading from an FTP server. The ReadTimeout is the amount of time that needs to elapse while no additional data is forthcoming. So during a long download, if the data stream halts for more than this amount, it will timeout. Otherwise, there is no limit on the length of time for the entire download.
public bool RequireSslCertVerify {get; set; }
If true, then the FTP2 client will verify the server's SSL certificate. The certificate is expired, or if the cert's signature is invalid, the connection is not allowed. The default value of this property is false.
public bool RestartNext {get; set; }
Both uploads and downloads may be resumed by simply setting this property = true and re-calling the upload or download method.
Example: Restart/Resume FTP Download
Example: Restart/Resume FTP Upload
public string SessionLog {get; }
Contains the session log if KeepSessionLog is turned on.
public bool SkipFinalReply {get; set; }
Special property used to help specific customers with a certain type of embedded FTP server. Do not use unless advised by Chilkat.
public bool Ssl {get; set; }
Use SSL for FTP connections. You would typically set Ssl = true when connecting to port 990 on FTP servers that support SSL mode. Note: It is more common to use AuthTls.
public bool SslServerCertVerified {get; }
Read-only property that returns true if the FTP server's digital certificate was verified when connecting via SSL / TLS.
public int UploadRate {get; }
The average upload rate in bytes/second. This property is updated in real-time during any FTP upload (asynchronous or synchronous).
public string Username {get; set; }
Username for logging into the FTP server. Defaults to "anonymous".
public string Version {get; }
Version of the component, such as "1.0.0"
Methods
public bool AppendFile(string localFilename, string remoteFilename);
Same as PutFile but the file on the FTP server is appended.
Returns true for success, false for failure.
FTP Progress Monitoring Events
public bool AppendFileFromBinaryData(string remoteFilename, byte[] content);
Same as PutFileFromBinaryData, except the file on the FTP server is appended.
Returns true for success, false for failure.
FTP Progress Monitoring Events
public bool AppendFileFromTextData(string remoteFilename, string textData, string charset);
Same as PutFileFromTextData, except the file on the FTP server is appended.
Returns true for success, false for failure.
FTP Progress Monitoring Events
public void AsyncAbort();
Causes an asynchronous Get or Put to abort.
public bool AsyncAppendFileStart(string localFilename, string remoteFilename);
Initiates an asynchronous append. The file is uploaded and appended to an existing file on the FTP server. The append happens in a background thread and can be aborted by calling AsyncAbort. The AsyncFinished property can be checked periodically to determine when the background transfer is finished. The status of the transfer is available in the AsyncSuccess property. The last-error information is available in the AsyncLog property. The AsyncBytesSent property is updated in real time to reflect the current number of bytes sent while the transfer is in progress. The UploadRate is also updated with the current upload rate in bytes/second. While a transfer is in progress, a program may periodically read the UploadRate and AsyncBytesSent properties to display progress.
Returns true for success, false for failure.
public bool AsyncGetFileStart(string remoteFilename, string localFilename);
Initiates an asynchronous file download. The download happens in a background thread and can be aborted by calling AsyncAbort. The AsyncFinished property can be checked periodically to determine when the background transfer is finished. The status of the transfer is available in the AsyncSuccess property. The last-error information is available in the AsyncLog property. The AsyncBytesReceived property is updated in real time to reflect the current number of bytes received while the transfer is in progress. The DownloadRate is also updated with the current download rate in bytes/second. While a transfer is in progress, a program may periodically read the DownloadRate and AsyncBytesReceived properties to display progress.
Returns true for success, false for failure.
About asynchronous progress monitoring
Using synchronous methods in a background thread with progress monitoring
public bool AsyncPutFileStart(string localFilename, string remoteFilename);
Initiates an asynchronous file upload. The file is uploaded and creates a new file on the FTP server, or overwrites an existing file. The upload happens in a background thread and can be aborted by calling AsyncAbort. The AsyncFinished property can be checked periodically to determine when the background transfer is finished. The status of the transfer is available in the AsyncSuccess property. The last-error information is available in the AsyncLog property. The AsyncBytesSent property is updated in real time to reflect the current number of bytes sent while the transfer is in progress. The UploadRate is also updated with the current upload rate in bytes/second. While a transfer is in progress, a program may periodically read the UploadRate and AsyncBytesSent properties to display progress.
Returns true for success, false for failure.
About asynchronous progress monitoring
Using synchronous methods in a background thread with progress monitoring
public bool ChangeRemoteDir(string relativeDirPath);
Changes the current remote directory.
Returns true for success, false for failure.
public bool ClearControlChannel();
Reverts the FTP control channel from SSL/TLS to an unencrypted channel. This may be required when using FTPS with AUTH TLS where the FTP client is behind a DSL or cable-modem router that performs NAT (network address translation). If the control channel is encrypted, the router is unable to translate the IP address sent in the PORT command for data transfers. By clearing the control channel, the data transfers will remain encrypted, but the FTP commands are passed unencrypted. Your program would typically clear the control channel after authenticating.
Returns true for success, false for failure.
public void ClearDirCache();
TheNumFilesAndDirs property returns the count of files and sub-directories in the current remote FTP directory, according to the ListPattern property. For example, if ListPattern is set to “*.xml”, then NumFilesAndDirs returns the count of XML files in the remote directory.
The 1st time it is accessed, the component will (behind the scenes) fetch the directory listing from the FTP server. This information is cached in the component until (1) the current remote directory is changed, or (2) the ListPattern is changed, or (3) the this method (ClearDirCache) is called.
public void ClearSessionLog();
Clears the in-memory session log.
public bool Connect();
Connects and logs in to the FTP server using the username/password provided in the component properties. Check the integer value of the ConnectFailReason if this method returns false (indicating failure).
Returns true for success, false for failure.
public bool ConvertToTls();
To be documented soon...
public string CreatePlan(string localDir);
Creates an "FTP plan" that lists the FTP operations that would be performed when PutTree is called. Additionally, the PutPlan method executes an "FTP plan" and logs each successful operation to a plan log file. If a large-scale upload is interrupted, the PutPlan can be resumed, skipping over the operations already listed in the plan log file.
Returns a null on failure
public bool CreateRemoteDir(string dir);
Creates a directory on the FTP server. If the directory already exists, a new one is not created and false is returned.
Returns true for success, false for failure.
public int DeleteMatching(string remotePattern);
Deletes all the files in the current remote FTP directory matching the pattern. Returns the number of files deleted, or -1 for failure. The pattern is a string such as "*.txt", where any number of "*" wildcard characters can be used. "*" matches 0 or more of any character.
public bool DeleteRemoteFile(string filename);
Deletes a file on the FTP server.
Returns true for success, false for failure.
public bool DeleteTree();
Deletes the entire subtree and all files from the current remote FTP directory. To delete a subtree on the FTP server, your program would first navigate to the root of the subtree to be deleted by calling ChangeRemoteDir, and then call DeleteTree. There are two event callbacks: VerifyDeleteFile and VerifyDeleteDir. Both are called prior to deleting each file or directory. The arguments to the callback include the full filepath of the file or directory, and an output-only "skip" flag. If your application sets the skip flag to true, the file or directory is NOT deleted. If a directory is not deleted, all files and sub-directories will remain. Example programs can be found at http://www.example-code.com/
Returns true for success, false for failure.
Delete FTP Directory Tree
public int DetermineProxyMethod();
Automatically determines the ProxyMethod that should be used with an FTP proxy server. Tries each of the five possible ProxyMethod settings and returns the value (1-5) of the ProxyMethod that succeeded.
This method may take a minute or two to complete. Returns 0 if no proxy methods were successful. Returns -1 to indicate an error (i.e. it was unable to test all proxy methods.)
Automatically Determine FTP Proxy Method
public string DetermineSettings();
Discovers which combinations of FTP2 property settings result in successful data transfers.
DetermineSettings tries 13 different combinations of these properties:
Ssl
AuthTls
AuthSsl
Port
Passive
PassiveUseHostAddr
Within the FTP protocol, the process of fetching a directory listing is also considered a “data transfer”. The DetermineSettings method works by checking to see which combinations result in a successful directory listing download. The method takes no arguments and returns a string containing an XML report of the results. It is a blocking call that may take approximately a minute to run. If you are unsure about how to interpret the results, cut-and-paste it into an email and send it to support@chilkatsoft.com.Returns a null on failure
DetermineSettings Example
public string DirTreeXml();
Recursively downloads the structure of a complete remote directory tree. Returns an XML document with the directory structure. A zero-length string is returned to indicate failure.
Returns a null on failure
Download Directory Tree Listing as XML
public bool Disconnect();
Disconnects from the FTP server, ending the current session.
Returns true for success, false for failure.
public bool DownloadTree(string localRoot);
Downloads an entire tree from the FTP server and recreates the directory tree on the local filesystem.
This method downloads all the files and subdirectories in the current remote directory. An application would first navigate to the directory to be downloaded via ChangeRemoteDir and then call this method.
There are three event callbacks (for programming languages supporting events): BeginDownloadFile, EndDownloadFile, and VerifyDownloadDir. The 1st argument to each callback is the fully qualified pathname of the file or directory. The BeginDownloadFile event callbacks has a "skip" argument, which is output-only. The application can set it to true to prevent the file from being downloaded. The VerifyDownloadDir also has a "skip" argument where the application can cause an entire sub-tree to be skipped. The EndDownloadFile event includes a "numBytes" argument containing the size of the file in bytes.
Returns true for success, false for failure.
C# FTP Events
Download Directory Tree Listing as XML
public string Feat();
Sends a FEAT command to the FTP server and returns the response. Returns a zero-length string to indicate failure. Here is a typical response:
211-Features:
MDTM
REST STREAM
SIZE
MLST type*;size*;modify*;
MLSD
AUTH SSL
AUTH TLS
UTF8
CLNT
MFMT
211 End
Returns a null on failure
FTP FEAT Command
public DateTime GetCreateTime(int index);
Returns the create time for the Nth file or sub-directory in the current remote directory. The first file/dir is at index 0, and the last one is at index (NumFilesAndDirs-1)
public DateTime GetCreateTimeByName(string filename);
Returns the file-creation time for a remote file by filename.
public string GetCurrentRemoteDir();
Returns the current remote directory.
Returns a null on failure
public bool GetFile(string remoteFilename, string localFilename);
Downloads a file from the FTP server to the local filesystem.
Returns true for success, false for failure.
FTP Progress Monitoring Events
public string GetFilename(int index);
Returns the filename for the Nth file or sub-directory in the current remote directory. The first file/dir is at index 0, and the last one is at index (NumFilesAndDirs-1)
Returns a null on failure
public bool GetIsDirectory(int index);
Returns true for a sub-directory and false for a file, for the Nth entry in the current remote directory. The first file/dir is at index 0, and the last one is at index (NumFilesAndDirs-1)
public bool GetIsSymbolicLink(int index);
Returns true if the remote file is a symbolic link. (Symbolic links only exist on Unix/Linux systems, not on Windows filesystems.)
public DateTime GetLastAccessTime(int index);
Returns the last access time for the Nth file or sub-directory in the current remote directory. The first file/dir is at index 0, and the last one is at index (NumFilesAndDirs-1)
public DateTime GetLastAccessTimeByName(string filename);
Returns a remote file's last-access time.
public DateTime GetLastModifiedTime(int index);
Returns the last modified time for the Nth file or sub-directory in the current remote directory. The first file/dir is at index 0, and the last one is at index (NumFilesAndDirs-1)
public DateTime GetLastModifiedTimeByName(string filename);
Returns the last-modified date/time for a remote file.
public byte[] GetRemoteFileBinaryData(string remoteFilename);
Downloads the contents of a remote file into a byte array.
Returns a null reference on failure.
Returns null on failure
public string GetRemoteFileTextC(string remoteFilename, string charset);
Downloads a text file directly into a string variable. The character encoding of the text file is specified by the charset argument, which is a value such as utf-8, iso-8859-1, Shift_JIS, etc.
Returns a null on failure
public string GetRemoteFileTextData(string remoteFilename);
Downloads the content of a remote text file directly into an in-memory string.
Note: If the remote text file does not use the ANSI character encoding, call GetRemoteFileTextC instead, which allows for the character encoding to be specified so that characters are properly interpreted.
Returns a null on failure
public int GetSize(int index);
Returns the size of the Nth remote file in the current directory.
public int GetSizeByName(string filename);
Returns a remote file's size in bytes.
public string GetSizeStr(int index);
Returns the size of a remote filename as a string. This is helpful for file sizes that are greater then 2GB.
Returns a null on failure
public string GetSizeStrByName(string filename);
To be documented soon...
public Cert GetSslServerCert();
Returns the FTP server's digital certificate (for SSL / TLS connections).
public string GetTextDirListing(string pattern);
Returns a listing of the files and directories in the current directory matching the pattern. Passing "*.*" will return all the files and directories.
Returns a null on failure
public string GetXmlDirListing(string pattern);
Returns (in XML format) the files and directories in the current directory matching the pattern. Passing "*.*" will return all the files and directories.
Returns a null on failure
public bool IsUnlocked();
Return true if the component is already unlocked.
public int MGetFiles(string remotePattern, string localDir);
Copies all the files in the current remote FTP directory to a local directory. To copy all the files in a remote directory, set remotePattern to "*.*" The pattern can contain any number of "*"characters where "*" matches 0 or more of any character. The return value is the number of files transferred, and on error, a value of -1 is returned. Detailed information about the transfer can be obtained from the last-error information (LastErrorText/LastErrorHtml/LastErrorXml/SaveLastError).
FTP Progress Monitoring Events
public int MPutFiles(string pattern);
Uploads all the files matching pattern on the local computer to the current remote FTP directory. The pattern parameter can include directory information, such as "C:/my_dir/*.txt" or it can simply be a pattern such as "*.*" that matches the files in the application's current directory. Subdirectories are not recursed. The return value is the number of files copied, with a value of -1 returned for errors. Detailed information about the transfer can be obtained from the XML log.[
public bool Noop();
Issues a no-op command to the FTP server.
public bool PutFile(string localFilename, string remoteFilename);
Uploads a local file to the current directory on the FTP server.
Returns true for success, false for failure.
FTP Progress Monitoring Events
public bool PutFileFromBinaryData(string remoteFilename, byte[] content);
Creates a file on the remote server containing the data passed in a byte array.
Returns true for success, false for failure.
FTP Progress Monitoring Events
public bool PutFileFromTextData(string remoteFilename, string textData, string charset);
Creates a file on the remote server containing the data passed in a string. Returns true for success, false for failure.[
FTP Progress Monitoring Events
public bool PutPlan(string plan, string alreadyDoneFilename);
Executes an "FTP plan" (created by the CreatePlan method) and logs each successful operation to a plan log file. If a large-scale upload is interrupted, the PutPlan can be resumed, skipping over the operations already listed in the plan log file. When resuming an interrupted PutPlan method, use the same log file. All completed operations found
in the already-existing log will automatically be skipped.
Returns true for success, false for failure.
public bool PutTree(string localDir);
Uploads an entire directory tree from the local filesystem to the remote FTP server, recreating the directory tree on the server. The PutTree method copies a directory tree to the current remote directory on the FTP server.
Returns true for success, false for failure.
FTP Progress Monitoring Events
public bool Quote(string cmd);
Sends an arbitrary (raw) command to the FTP server and returns the raw response.
public bool RemoveRemoteDir(string dir);
Removes a directory from the FTP server.
public bool RenameRemoteFile(string existingFilename, string newFilename);
Renames a file or directory on the FTP server. To move a file from one directory to another on a remote FTP server, call this method and include the source and destination directory filepath.
public bool SaveLastError(string filename);
Saves the last error information to an XML formatted file.
public string SendCommand(string cmd);
Sends an raw command to the FTP server and returns the raw response.
Returns a null on failure
public bool SetModeZ();
Chilkat FTP2 supports MODE Z, which is a transfer mode implemented by some FTP servers. It allows for files to be uploaded and downloaded using compressed streams (using the zlib deflate algorithm).
Call this method after connecting to enable Mode Z. Once enabled, all transfers (uploads, downloads, and directory listings) are compressed.
Returns true for success, false for failure.
public void SetOldestDate(DateTime oldestDateTime);
Used in conjunction with the DownloadTree method. Call this method prior to calling DownloadTree to set the oldest date for a file to be downloaded. When DownloadTree is called, any file older than this date will not be downloaded.
public void SetSslCertRequirement(string reqName, string reqValue);
Enforces a requirement on the FTP server's certificate. The reqName can be "SubjectDN", "SubjectCN", "IssuerDN", or "IssuerCN". The reqName specifies the part of the certificate, and the reqValue is the value that it must match (exactly). If the FTP server's certificate does not match, the SSL / TLS connection is aborted.
public void SetSslClientCert(Cert cert);
Allows for a client-side certificate to be used for the SSL / TLS connection.
public bool SetTypeAscii();
Set the FTP transfer mode to us-ascii.
Returns true for success, false for failure.
public bool SetTypeBinary();
Set the FTP transfer mode to binary.
Returns true for success, false for failure.
public bool Site(string params);
Sends an arbitrary "site" command to the FTP server. The params argument should contain the parameters to the site command as they would appear on a command line. For example: "recfm=fb lrecl=600".
Returns true for success, false for failure.
public void SleepMs(int millisec);
Causes the calling process to sleep for a number of milliseconds.
public string Stat();
Sends a STAT command to the FTP server and returns the server's reply.
Returns a null on failure
public bool SyncLocalTree(string localRoot, int mode);
Downloads files from the FTP server to a local directory tree. Synchronization modes include:
mode=0: Download all files
mode=1: Download all files that do not exist on the local filesystem.
mode=2: Download newer or non-existant files.
mode=3: Download only newer files. If a file does not already exist on the local filesystem, it is not downloaded from the server.
Example: Synchronize Local Directory Tree
public bool SyncRemoteTree(string localRoot, int mode);
Uploads a directory tree from the local filesystem to the FTP server. Synchronization modes include:
mode=0: Upload all files
mode=1: Upload all files that do not exist on the FTP server.
mode=2: Upload newer or non-existant files.
mode=3: Upload only newer files. If a file does not already exist on the FTP server, it is not uploaded.
Example: Synchronize Remote Directory Tree
public string Syst();
Sends a SYST command to the FTP server to find out the type of operating
system at the server. The method returns the FTP server's response string. Refer to RFC 959 for details.
Returns a null on failure
public bool UnlockComponent(string unlockCode);
Unlocks the component. This must be called once prior to calling any other method.