twisted.protocols.ftp.FTP

class documentation

class FTP(basic.LineReceiver, policies.TimeoutMixin): (source)

Protocol Interpreter for the File Transfer Protocol

Method	`cleanupDTP`	Call when DTP connection exits
Method	`connectionLost`	Called when the connection is shut down.
Method	`connectionMade`	Called when a connection is made.
Method	`ftp_CDUP`	Undocumented
Method	`ftp_CWD`	Undocumented
Method	`ftp_DELE`	Undocumented
Method	`ftp_EPRT`	Extended request for a data connection.
Method	`ftp_EPSV`	Extended request for a passive connection.
Method	`ftp_FEAT`	Advertise the features supported by the server.
Method	`ftp_LIST`	This command causes a list to be sent from the server to the passive DTP. If the pathname specifies a directory or other group of files, the server should transfer a list of files in the specified directory...
Method	`ftp_MDTM`	File Modification Time (MDTM)
Method	`ftp_MKD`	Undocumented
Method	`ftp_MODE`	Undocumented
Method	`ftp_NLST`	This command causes a directory listing to be sent from the server to the client. The pathname should specify a directory or other system-specific file group descriptor. An empty path implies the current working directory...
Method	`ftp_NOOP`	Undocumented
Method	`ftp_OPTS`	Handle OPTS command.
Method	`ftp_PASS`	Second part of login. Get the password the peer wants to authenticate with.
Method	`ftp_PASV`	Request for a passive connection
Method	`ftp_PORT`	Undocumented
Method	`ftp_PWD`	Undocumented
Method	`ftp_QUIT`	Undocumented
Method	`ftp_RETR`	This command causes the content of a file to be sent over the data transfer channel. If the path is to a folder, an error will be raised.
Method	`ftp_RMD`	Undocumented
Method	`ftp_RNFR`	Undocumented
Method	`ftp_RNTO`	Undocumented
Method	`ftp_SIZE`	File SIZE
Method	`ftp_STOR`	STORE (STOR)
Method	`ftp_STRU`	Undocumented
Method	`ftp_SYST`	Undocumented
Method	`ftp_TYPE`	REPRESENTATION TYPE (TYPE)
Method	`ftp_USER`	First part of login. Get the username the peer wants to authenticate as.
Method	`getDTPPort`	Return a port for passive access, using `self.passivePortRange` attribute.
Method	`lineReceived`	Override this for when each line is received.
Method	`processCommand`	Undocumented
Method	`reply`	Undocumented
Method	`sendLine`	(Private) Encodes and sends a line
Method	`timeoutConnection`	Called when the connection times out.
Method	`type_A`	Undocumented
Method	`type_I`	Undocumented
Method	`type_UNKNOWN`	Undocumented
Constant	`FEATURES`	Undocumented
Constant	`PUBLIC_COMMANDS`	Undocumented
Class Variable	`AUTHED`	Command channel was successfully authenticated.
Class Variable	`dtpTimeout`	Undocumented
Class Variable	`INAUTH`	Command channel is in the process of being authenticated.
Class Variable	`portal`	Undocumented
Class Variable	`RENAMING`	Command channel is between the renaming command sequence.
Class Variable	`UNAUTH`	Command channel is not yet authenticated.
Instance Variable	`binary`	The transfer mode. If false, ASCII.
Instance Variable	`disconnected`	Undocumented
Instance Variable	`dtpFactory`	Generates a single DTP for this session
Instance Variable	`dtpInstance`	Undocumented
Instance Variable	`dtpPort`	Port returned from listenTCP
Instance Variable	`listenFactory`	A callable with the signature of `twisted.internet.interfaces.IReactorTCP.listenTCP` which will be used to create Ports for passive connections (mainly for testing).
Instance Variable	`passivePortRange`	iterator used as source of passive port numbers.
Instance Variable	`shell`	The connected avatar
Instance Variable	`state`	The current server state. One of `UNAUTH`, `INAUTH`, `AUTHED`, `RENAMING`.
Instance Variable	`transport`	Undocumented
Method	`_encodeName`	Encode `name` to be sent over the wire.
Method	`_validateNetworkProtocol`	Validate the network protocol requested in an EPRT or EPSV command.
Class Variable	`_encoding`	Undocumented
Instance Variable	`_epsvAll`	If true, "EPSV ALL" was received from the client, requiring the server to reject all data connection setup commands other than EPSV. See RFC 2428.
Instance Variable	`_fromName`	Undocumented
Instance Variable	`_supportedNetworkProtocols`	A collection of network protocol numbers supported by the EPRT and EPSV commands.
Instance Variable	`_user`	Undocumented

Inherited from LineReceiver:

Method	`clearLineBuffer`	Clear buffered data.
Method	`dataReceived`	Protocol.dataReceived. Translates bytes into lines, and calls lineReceived (or rawDataReceived, depending on mode.)
Method	`lineLengthExceeded`	Called when the maximum line length has been reached. Override if it needs to be dealt with in some special way.
Method	`rawDataReceived`	Override this for when raw data is received.
Method	`setLineMode`	Sets the line-mode of this receiver.
Method	`setRawMode`	Sets the raw mode of this receiver. Further data received will be sent to rawDataReceived rather than lineReceived.
Constant	`MAX_LENGTH`	The maximum length of a line to allow (If a sent line is longer than this, the connection is dropped). Default is 16384.
Class Variable	`delimiter`	The line-ending delimiter to use. By default this is `b'\r\n'`.
Instance Variable	`line_mode`	Undocumented
Instance Variable	`_buffer`	Undocumented
Instance Variable	`_busyReceiving`	Undocumented

Inherited from Protocol (via LineReceiver):

Method	`logPrefix`	Return a prefix matching the class name, to identify log messages related to this protocol instance.
Class Variable	`factory`	Undocumented

Inherited from BaseProtocol (via LineReceiver, Protocol):

Method	`makeConnection`	Make a connection to a transport and a server.
Instance Variable	`connected`	Undocumented

Inherited from _PauseableMixin (via LineReceiver, Protocol, BaseProtocol):

Method	`pauseProducing`	Undocumented
Method	`resumeProducing`	Undocumented
Method	`stopProducing`	Undocumented
Instance Variable	`paused`	Undocumented

Inherited from TimeoutMixin (via LineReceiver, Protocol, BaseProtocol, _PauseableMixin):

Method	`callLater`	Wrapper around `reactor.callLater` for test purpose.
Method	`resetTimeout`	Reset the timeout count down.
Method	`setTimeout`	Change the timeout period
Instance Variable	`timeOut`	The number of seconds after which to timeout the connection.
Method	`__timedOut`	Undocumented
Instance Variable	`__timeoutCall`	Undocumented

def cleanupDTP(self): (source) ¶

Call when DTP connection exits

def connectionLost(self, reason): (source) ¶

from twisted.internet.interfaces.IProtocol

overrides twisted.internet.protocol.Protocol.connectionLost

Called when the connection is shut down.

Clear any circular references here, and any external references to this Protocol. The connection has been closed.

Parameters
reason:`twisted.python.failure.Failure`	Undocumented

def connectionMade(self): (source) ¶

from twisted.internet.interfaces.IProtocol

overrides twisted.internet.protocol.BaseProtocol.connectionMade

Called when a connection is made.

This may be considered the initializer of the protocol, because it is called when the connection is completed. For clients, this is called once the connection to the server has been established; for servers, this is called after an accept() call stops blocking and a socket has been received. If you need to send any greeting or initial message, do it here.

def ftp_CDUP(self): (source) ¶

Undocumented

def ftp_CWD(self, path): (source) ¶

Undocumented

def ftp_DELE(self, path): (source) ¶

Undocumented

def ftp_EPRT(self, extendedAddress): (source) ¶

Extended request for a data connection.

As described by RFC 2428 section 2:

    The EPRT command allows for the specification of an extended
    address for the data connection.  The extended address MUST
    consist of the network protocol as well as the network and
    transport addresses.

def ftp_EPSV(self, protocol=''): (source) ¶

Extended request for a passive connection.

As described by RFC 2428 section 3:

    The EPSV command requests that a server listen on a data port
    and wait for a connection.  The EPSV command takes an optional
    argument.  The response to this command includes only the TCP
    port number of the listening connection.  The format of the
    response, however, is similar to the argument of the EPRT
    command.  This allows the same parsing routines to be used for
    both commands.  In addition, the format leaves a place holder
    for the network protocol and/or network address, which may be
    needed in the EPSV response in the future.

def ftp_FEAT(self): (source) ¶

Advertise the features supported by the server.

http://tools.ietf.org/html/rfc2389

def ftp_LIST(self, path=''): (source) ¶

This command causes a list to be sent from the server to the passive DTP. If the pathname specifies a directory or other group of files, the server should transfer a list of files in the specified directory. If the pathname specifies a file then the server should send current information on the file. A null argument implies the user's current working or default directory.

def ftp_MDTM(self, path): (source) ¶

File Modification Time (MDTM)

The FTP command, MODIFICATION TIME (MDTM), can be used to determine when a file in the server NVFS was last modified. This command has existed in many FTP servers for many years, as an adjunct to the REST command for STREAM mode, thus is widely available. However, where supported, the "modify" fact that can be provided in the result from the new MLST command is recommended as a superior alternative.

http://tools.ietf.org/html/rfc3659

def ftp_MKD(self, path): (source) ¶

Undocumented

def ftp_MODE(self, mode): (source) ¶

Undocumented

def ftp_NLST(self, path): (source) ¶

This command causes a directory listing to be sent from the server to the client. The pathname should specify a directory or other system-specific file group descriptor. An empty path implies the current working directory. If the path is non-existent, send nothing. If the path is to a file, send only the file name.

Parameters
path:`str`	The path for which a directory listing should be returned.
Returns
`Deferred`	a `Deferred` which will be fired when the listing request is finished.

def ftp_NOOP(self): (source) ¶

Undocumented

def ftp_OPTS(self, option): (source) ¶

Handle OPTS command.

http://tools.ietf.org/html/draft-ietf-ftpext-utf-8-option-00

def ftp_PASS(self, password): (source) ¶

Second part of login. Get the password the peer wants to authenticate with.

def ftp_PASV(self): (source) ¶

Request for a passive connection

from the rfc:

    This command requests the server-DTP to "listen" on a data port
    (which is not its default data port) and to wait for a connection
    rather than initiate one upon receipt of a transfer command.  The
    response to this command includes the host and port address this
    server is listening on.

def ftp_PORT(self, address): (source) ¶

Undocumented

def ftp_PWD(self): (source) ¶

Undocumented

def ftp_QUIT(self): (source) ¶

Undocumented

def ftp_RETR(self, path): (source) ¶

This command causes the content of a file to be sent over the data transfer channel. If the path is to a folder, an error will be raised.

Parameters
path:`str`	The path to the file which should be transferred over the data transfer channel.
Returns
`Deferred`	a `Deferred` which will be fired when the transfer is done.

def ftp_RMD(self, path): (source) ¶

Undocumented

def ftp_RNFR(self, fromName): (source) ¶

Undocumented

def ftp_RNTO(self, toName): (source) ¶

Undocumented

def ftp_SIZE(self, path): (source) ¶

File SIZE

The FTP command, SIZE OF FILE (SIZE), is used to obtain the transfer size of a file from the server-FTP process. This is the exact number of octets (8 bit bytes) that would be transmitted over the data connection should that file be transmitted. This value will change depending on the current STRUcture, MODE, and TYPE of the data connection or of a data connection that would be created were one created now. Thus, the result of the SIZE command is dependent on the currently established STRU, MODE, and TYPE parameters.

The SIZE command returns how many octets would be transferred if the file were to be transferred using the current transfer structure, mode, and type. This command is normally used in conjunction with the RESTART (REST) command when STORing a file to a remote server in STREAM mode, to determine the restart point. The server-PI might need to read the partially transferred file, do any appropriate conversion, and count the number of octets that would be generated when sending the file in order to correctly respond to this command. Estimates of the file transfer size MUST NOT be returned; only precise information is acceptable.

http://tools.ietf.org/html/rfc3659

def ftp_STOR(self, path): (source) ¶

STORE (STOR)

This command causes the server-DTP to accept the data transferred via the data connection and to store the data as a file at the server site. If the file specified in the pathname exists at the server site, then its contents shall be replaced by the data being transferred. A new file is created at the server site if the file specified in the pathname does not already exist.

def ftp_STRU(self, structure): (source) ¶

Undocumented

def ftp_SYST(self): (source) ¶

Undocumented

def ftp_TYPE(self, type): (source) ¶

REPRESENTATION TYPE (TYPE)

The argument specifies the representation type as described in the Section on Data Representation and Storage. Several types take a second parameter. The first parameter is denoted by a single Telnet character, as is the second Format parameter for ASCII and EBCDIC; the second parameter for local byte is a decimal integer to indicate Bytesize. The parameters are separated by a <SP> (Space, ASCII code 32).

def ftp_USER(self, username): (source) ¶

First part of login. Get the username the peer wants to authenticate as.

def getDTPPort(self, factory, interface=''): (source) ¶

Return a port for passive access, using self.passivePortRange attribute.

Parameters
factory:`twisted.internet.protocol.ServerFactory`	the protocol factory to connect to the port.
interface:`str`	the local IPv4 or IPv6 address to which to bind; defaults to "", i.e. all IPv4 addresses.

def lineReceived(self, line): (source) ¶

overrides twisted.protocols.basic.LineReceiver.lineReceived

Override this for when each line is received.

Parameters
line:`bytes`	The line which was received with the delimiter removed.

def processCommand(self, cmd, *params): (source) ¶

Undocumented

def reply(self, key, *args): (source) ¶

Undocumented

def sendLine(self, line): (source) ¶

overrides twisted.protocols.basic.LineReceiver.sendLine

(Private) Encodes and sends a line

Parameters
line	`bytes` or `unicode`

def timeoutConnection(self): (source) ¶

overrides twisted.protocols.policies.TimeoutMixin.timeoutConnection

Called when the connection times out.

Override to define behavior other than dropping the connection.

def type_A(self, code): (source) ¶

Undocumented

def type_I(self, code): (source) ¶

Undocumented

def type_UNKNOWN(self, code): (source) ¶

Undocumented

FEATURES: list[str] = (source) ¶

Undocumented

Value

['FEAT', 'MDTM', 'PASV', 'SIZE', 'TYPE A;I']

PUBLIC_COMMANDS: list[str] = (source) ¶

Undocumented

Value

['FEAT', 'QUIT']

AUTHED: int = (source) ¶

Command channel was successfully authenticated.

dtpTimeout: int = (source) ¶

Undocumented

INAUTH: int = (source) ¶

Command channel is in the process of being authenticated.

portal = (source) ¶

Undocumented

RENAMING: int = (source) ¶

Command channel is between the renaming command sequence.

UNAUTH: int = (source) ¶

Command channel is not yet authenticated.

binary: bool = (source) ¶

The transfer mode. If false, ASCII.

disconnected: bool = (source) ¶

Undocumented

dtpFactory = (source) ¶

Generates a single DTP for this session

dtpInstance = (source) ¶

Undocumented

dtpPort = (source) ¶

Port returned from listenTCP

listenFactory = (source) ¶

A callable with the signature of twisted.internet.interfaces.IReactorTCP.listenTCP which will be used to create Ports for passive connections (mainly for testing).

passivePortRange: iterator = (source) ¶

iterator used as source of passive port numbers.

shell = (source) ¶

The connected avatar

state = (source) ¶

The current server state. One of UNAUTH, INAUTH, AUTHED, RENAMING.

transport = (source) ¶

overrides twisted.internet.protocol.BaseProtocol.transport

Undocumented

def _encodeName(self, name): (source) ¶

Encode name to be sent over the wire.

This encodes unicode objects as UTF-8 and leaves bytes as-is.

As described by RFC 3659 section 2.2:

    Various FTP commands take pathnames as arguments, or return
    pathnames in responses. When the MLST command is supported, as
    indicated in the response to the FEAT command, pathnames are to be
    transferred in one of the following two formats.

        pathname = utf-8-name / raw
        utf-8-name = <a UTF-8 encoded Unicode string>
        raw = <any string that is not a valid UTF-8 encoding>

    Which format is used is at the option of the user-PI or server-PI
    sending the pathname.

Parameters
name:`bytes` or `unicode`	Name to be encoded.
Returns
`bytes`	Wire format of `name`.

def _validateNetworkProtocol(self, protocol): (source) ¶

Validate the network protocol requested in an EPRT or EPSV command.

For now we just hardcode the protocols we support, since this layer doesn't have a good way to discover that.

Parameters
protocol:`str`	An address family number. See RFC 2428 section 2.
Raises
`FTPCmdError`	If validation fails.

_encoding: str = (source) ¶

Undocumented

_epsvAll: bool = (source) ¶

If true, "EPSV ALL" was received from the client, requiring the server to reject all data connection setup commands other than EPSV. See RFC 2428.

_fromName = (source) ¶

Undocumented

_supportedNetworkProtocols = (source) ¶

A collection of network protocol numbers supported by the EPRT and EPSV commands.

_user = (source) ¶

Undocumented