FTP Class
Properties Methods Events Configuration Settings Errors
The FTP Class can be used to transfer files to and from FTP servers using the FTP Protocol.
Syntax
FTP
Remarks
The FTP Class supports both plaintext and SSL/TLS connections. When connecting over SSL/TLS the SSLServerAuthentication event allows you to check the server identity and other security attributes. The SSLStatus event provides information about the SSL handshake. Additional SSL related settings are also supported via the Config method.
The FTP Class implements a standard FTP client as specified in RFC 959 and RFC 1579 with the added option of SSL security (RFC 2228) in both the protocol and data channels.
The first step in using the class is specifying the RemoteHost, User and Password. The file to upload to or download from is given by the RemoteFile property. The file to download to or upload from is specified by LocalFile. The current path in the server is specified by the RemotePath property. The Passive property is especially useful if the client is behind a firewall which inhibits incoming connections to higher ports.
If LocalFile is set to something other than an empty string, then files are received in LocalFile, otherwise the data is received through the Transfer event. StartTransfer and EndTransfer are fired at the beginning and end of transmission.
The PITrail event traces the interaction between the client and the server (the FTP Protocol Interface connection).
Directory listings are received through the DirList event.
Property List
The following is the full list of the properties of the class with short descriptions. Click on the links for further details.
Account | The user account to login with. |
Command | Used to send additional commands directly to the server. |
Connected | Shows whether the class is connected. |
DirListCount | The number of records in the DirList arrays. |
DirListEntry | This property contains the raw entry as received from the server. |
DirListFileName | This property shows the file name in the last directory listing. |
DirListFileSize | This property shows the file size in the last directory listing. |
DirListFileTime | This property shows the file time in the last directory listing. |
DirListIsDir | This property specifies whether entries in the last directory listing are directories. |
FileExists | Returns True if the file specified by RemoteFile exists on the remote server. |
FileSize | The size of the file pointed to by RemoteFile . |
FileTime | The last modification time of the file pointed to by RemoteFile . |
FirewallAutoDetect | This property tells the class whether or not to automatically detect and use firewall system settings, if available. |
FirewallType | This property determines the type of firewall to connect through. |
FirewallHost | This property contains the name or IP address of firewall (optional). |
FirewallPassword | This property contains a password if authentication is to be used when connecting through the firewall. |
FirewallPort | This property contains the TCP port for the firewall Host . |
FirewallUser | This property contains a user name if authentication is to be used connecting through a firewall. |
Idle | The current status of the class. |
LastReply | The last reply from the server. |
LocalFile | The path to a local file for download/upload. If the file exists, it is overwritten. |
LocalHost | The name of the local host or user-assigned IP interface through which connections are initiated or accepted. |
Overwrite | Indicates whether or not the class should overwrite files during transfer. |
Passive | Controls whether to direct the server into passive mode. Recommended if behind a firewall. |
Password | The password to log in. |
RemoteFile | The name of the remote file for uploading, downloading, etc. |
RemoteHost | The domain name or IP address of the FTP server. |
RemotePath | The current path in the FTP server. |
RemotePort | The port for the FTP service (default is 21). |
SSLAcceptServerCertEncoded | The certificate (PEM/base64 encoded). |
SSLCertEncoded | The certificate (PEM/base64 encoded). |
SSLCertStore | The name of the certificate store for the client certificate. |
SSLCertStorePassword | If the certificate store is of a type that requires a password, this property is used to specify that password in order to open the certificate store. |
SSLCertStoreType | The type of certificate store for this certificate. |
SSLCertSubject | The subject of the certificate used for client authentication. |
SSLEnabled | Whether TLS/SSL is enabled. |
SSLServerCertEncoded | The certificate (PEM/base64 encoded). |
SSLStartMode | Determines how the class starts the SSL negotiation. |
StartByte | The byte index in RemoteFile and LocalFile from which to start the transmission. |
Timeout | A timeout for the class. |
TransferMode | The transfer mode (ASCII or Binary). If the value is 0 (default), the initial server mode will be used. |
User | The user identifier to use for login. |
Method List
The following is the full list of the methods of the class with short descriptions. Click on the links for further details.
Abort | Abort Current Upload/Download. |
Append | Append data from LocalFile to a RemoteFile on an FTP server. |
Config | Sets or retrieves a configuration setting. |
DeleteFile | Remove a file specified by FileName from an FTP server. |
DoEvents | Processes events from the internal message queue. |
Download | Download a RemoteFile from an FTP server. |
Interrupt | Interrupt the current method. |
ListDirectory | List the current directory specified by RemotePath on an FTP server. |
ListDirectoryLong | List extended directory information for RemotePath . |
Logoff | Logoff from the FTP server by posting a QUIT command. |
Logon | Logon to the FTP RemoteHost using the current User and Password . |
MakeDirectory | Create a directory on an FTP server. |
RemoveDirectory | Remove a directory specified by DirName from an FTP server. |
RenameFile | Change the name of RemoteFile to NewName . |
Reset | Reset the class. |
SetDownloadStream | Sets the stream to which the downloaded data from the server will be written. |
SetUploadStream | Sets the stream from which the class will read data to upload to the server. |
StoreUnique | Upload a file with a Unique Name to an FTP server. |
Upload | Upload a file specified by LocalFile to an FTP server. |
Event List
The following is the full list of the events fired by the class with short descriptions. Click on the links for further details.
ConnectionStatus | Fired to indicate changes in connection state. |
DirList | Fired when a directory entry is received. |
EndTransfer | Fired when a file completes downloading/uploading. |
Error | Information about errors during data delivery. |
PITrail | Traces the commands sent to the server, and the respective replies. |
SSLServerAuthentication | Fired after the server presents its certificate to the client. |
SSLStatus | Shows the progress of the secure connection. |
StartTransfer | Fired when a file starts downloading/uploading. |
Transfer | Fired during file download/upload. |
Configuration Settings
The following is a list of configuration settings for the class with short descriptions. Click on the links for further details.
ActiveModeIP | Allows the specification of the IP address that the server will connect to for active mode connections. |
ActiveModePORTAddress | Allows the specification of the PORT address value for active mode connections. |
AppendToLocalFile | Append downloaded files to a local file. |
ApplyFileMaskLocally | Whether to filter the directory listing locally or on the server. |
AutoSelectDataIP | Automatically select the data connection IP. |
CalculatePercentDone | Enables or Disables calculating the percent complete for downloads. |
CheckTotalEntry | Whether to ignore directory listing total lines. |
DILinger | When set to True, DI connections are terminated gracefully. |
DILingerTime | Time in seconds to have the DI connection linger. |
FileTimeFormat | The format of file time reported by the server. |
IgnoreEntries | Directory entry data to ignore. |
MaskSensitive | Masks passwords in logs. |
ModeZCompressionLevel | Used to specify the level of compression used. |
PortRange | Allows the specification of a port range where the class listens for active mode connections. |
PreserveFileTime | Attempts to preserve timestamps when transferring files. |
RealTimeUpload | Enables real time uploading. |
RealTimeUploadAgeLimit | The age limit in seconds when using RealTimeUpload. |
ReusePISSLSessionInDI | Whether the PI SSL session will be reused for the DI connection. |
ReuseSSLSessionInDI | Whether the SSL session will be reused for the DI connection. |
UseClearChannel | Allows for the Clear Command Channel (CCC) command. |
UseClearDataChannel | Allows for the PROT C command. |
UseEPSV | Allows extended passive mode. |
UseMLSD | Uses listings for machine processing. |
UseMLST | Uses single file listing for machine processing. |
UseModeZ | Allows compression to be used when transferring data. |
UseOldAUTHSSL | Allows use of the 'AUTH SSL' command instead of 'AUTH TLS'. |
UseProtWhenImplicit | Sends the PROT P command to the server. |
UseRemoteHostAddressForPassive | Instructs the class to use the address specified by RemoteHost when establishing a data connection. |
VirtualHostName | Sends the HOST command to the server. |
ConnectionTimeout | Sets a separate timeout value for establishing a connection. |
FirewallAutoDetect | Tells the class whether or not to automatically detect and use firewall system settings, if available. |
FirewallHost | Name or IP address of firewall (optional). |
FirewallPassword | Password to be used if authentication is to be used when connecting through the firewall. |
FirewallPort | The TCP port for the FirewallHost;. |
FirewallType | Determines the type of firewall to connect through. |
FirewallUser | A user name if authentication is to be used connecting through a firewall. |
KeepAliveInterval | The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received. |
KeepAliveRetryCount | The number of keep-alive packets to be sent before the remotehost is considered disconnected. |
KeepAliveTime | The inactivity time in milliseconds before a TCP keep-alive packet is sent. |
Linger | When set to True, connections are terminated gracefully. |
LingerTime | Time in seconds to have the connection linger. |
LocalHost | The name of the local host through which connections are initiated or accepted. |
LocalPort | The port in the local host where the class binds. |
MaxLineLength | The maximum amount of data to accumulate when no EOL is found. |
MaxTransferRate | The transfer rate limit in bytes per second. |
ProxyExceptionsList | A semicolon separated list of hosts and IPs to bypass when using a proxy. |
TCPKeepAlive | Determines whether or not the keep alive socket option is enabled. |
TcpNoDelay | Whether or not to delay when sending packets. |
UseIPv6 | Whether to use IPv6. |
LogSSLPackets | Controls whether SSL packets are logged when using the internal security API. |
OpenSSLCADir | The path to a directory containing CA certificates. |
OpenSSLCAFile | Name of the file containing the list of CA's trusted by your application. |
OpenSSLCipherList | A string that controls the ciphers to be used by SSL. |
OpenSSLPrngSeedData | The data to seed the pseudo random number generator (PRNG). |
ReuseSSLSession | Determines if the SSL session is reused. |
SSLCACertFilePaths | The paths to CA certificate files on Unix/Linux. |
SSLCACerts | A newline separated list of CA certificate to use during SSL client authentication. |
SSLCipherStrength | The minimum cipher strength used for bulk encryption. |
SSLEnabledCipherSuites | The cipher suite to be used in an SSL negotiation. |
SSLEnabledProtocols | Used to enable/disable the supported security protocols. |
SSLEnableRenegotiation | Whether the renegotiation_info SSL extension is supported. |
SSLIncludeCertChain | Whether the entire certificate chain is included in the SSLServerAuthentication event. |
SSLNegotiatedCipher | Returns the negotiated ciphersuite. |
SSLNegotiatedCipherStrength | Returns the negotiated ciphersuite strength. |
SSLNegotiatedCipherSuite | Returns the negotiated ciphersuite. |
SSLNegotiatedKeyExchange | Returns the negotiated key exchange algorithm. |
SSLNegotiatedKeyExchangeStrength | Returns the negotiated key exchange algorithm strength. |
SSLNegotiatedVersion | Returns the negotiated protocol version. |
SSLProvider | The name of the security provider to use. |
SSLSecurityFlags | Flags that control certificate verification. |
SSLServerCACerts | A newline separated list of CA certificate to use during SSL server certificate validation. |
TLS12SignatureAlgorithms | Defines the allowed TLS 1.2 signature algorithms when UseInternalSecurityAPI is True. |
TLS12SupportedGroups | The supported groups for ECC. |
TLS13KeyShareGroups | The groups for which to pregenerate key shares. |
TLS13SignatureAlgorithms | The allowed certificate signature algorithms. |
TLS13SupportedGroups | The supported groups for (EC)DHE key exchange. |
AbsoluteTimeout | Determines whether timeouts are inactivity timeouts or absolute timeouts. |
FirewallData | Used to send extra data to the firewall. |
InBufferSize | The size in bytes of the incoming queue of the socket. |
OutBufferSize | The size in bytes of the outgoing queue of the socket. |
BuildInfo | Information about the product's build. |
CodePage | The system code page used for Unicode to Multibyte translations. |
LicenseInfo | Information about the current license. |
ProcessIdleEvents | Whether the class uses its internal event loop to process events when the main thread is idle. |
SelectWaitMillis | The length of time in milliseconds the class will wait when DoEvents is called if there are no events to process. |
UseInternalSecurityAPI | Tells the class whether or not to use the system security libraries or an internal implementation. |