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authorGuido van Rossum <guido@python.org>1995-03-22 15:48:46 (GMT)
committerGuido van Rossum <guido@python.org>1995-03-22 15:48:46 (GMT)
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\renewcommand{\indexsubitem}{(in module ftplib)}
-To be provided.
+This module defines the class \code{FTP} and a few related items. The
+\code{FTP} class implements the client side of the FTP protocol. You
+can use this to write Python programs that perform a variety of
+automated FTP jobs, such as mirroring other ftp servers. It is also
+used bu the module \code{urllib} to handle URLs that use FTP. For
+more information on FTP (File Transfer Protocol), see Internet RFC
+959.
+
+Here's a sample session using the \code{ftplib} module:
+
+\begin{verbatim}
+>>> from ftplib import FTP
+>>> ftp = FTP('ftp.cwi.nl') # connect to host, default port
+>>> ftp.login() # default user anonymous, passwd user@hostname
+>>> ftp.retrlines('LIST') # list directory contents
+total 24418
+drwxrwsr-x 5 ftp-usr pdmaint 1536 Mar 20 09:48 .
+dr-xr-srwt 105 ftp-usr pdmaint 1536 Mar 21 14:32 ..
+-rw-r--r-- 1 ftp-usr pdmaint 5305 Mar 20 09:48 INDEX
+ .
+ .
+ .
+>>> ftp.quit()
+\end{verbatim}
+
+The module defines the following items:
+
+\begin{funcdesc}{FTP}{\optional{host\optional{\, user\, passwd\, acct}}}
+Return a new instance of the \code{FTP} class. When
+\var{host} is given, the method call \code{connect(\var{host})} is
+made. When \var{user} is given, additionally the method call
+\code{login(\var{user}, \var{passwd}, \var{acct})} is made (where
+\var{passwd} and \var{acct} default to the empty string when not given).
+\end{funcdesc}
+
+\begin{datadesc}{all_errors}
+The set of all exceptions (as a tuple) that methods of \code{FTP}
+instances may raise as a result of problems with the FTP connection
+(as opposed to programming errors made by the caller). This set
+includes the four exceptions listed below as well as
+\code{socket.error} and \code{IOError}.
+\end{datadesc}
+
+\begin{excdesc}{error_reply}
+Exception raised when an unexpected reply is received from the server.
+\end{excdesc}
+
+\begin{excdesc}{error_temp}
+Exception raised when an error code in the range 400--499 is received.
+\end{excdesc}
+
+\begin{excdesc}{error_perm}
+Exception raised when an error code in the range 500--599 is received.
+\end{excdesc}
+
+\begin{excdesc}{error_proto}
+Exception raised when a reply is received from the server that does
+not begin with a digit in the range 1--5.
+\end{excdesc}
+
+\subsection{FTP Objects}
+
+FTP instances have the following methods:
+
+\renewcommand{\indexsubitem}{(FTP object method)}
+
+\begin{funcdesc}{set_debuglevel}{level}
+Set the instance's debugging level. This controls the amount of
+debugging output printed. The default, 0, produces no debugging
+output. A value of 1 produces a moderate amount of debugging output,
+generally a single line per request. A value of 2 or higher produces
+the maximum amount of debugging output, logging each line sent and
+received on the control connection.
+\end{funcdesc}
+
+\begin{funcdesc}{connect}{host\optional{\, port}}
+Connect to the given host and port. The default port number is 21, as
+specified by the FTP protocol specification. It is rarely needed to
+specify a different port number. This function should be called only
+once for each instance; it should not be called at all if a host was
+given when the instance was created. All other methods can only be
+used after a connection has been made.
+\end{funcdesc}
+
+\begin{funcdesc}{getwelcome}{}
+Return the welcome message sent by the server in reply to the initial
+connection. (This message sometimes contains disclaimers or help
+information that may be relevant to the user.)
+\end{funcdesc}
+
+\begin{funcdesc}{login}{\optional{user\optional{\, passwd\optional{\, acct}}}}
+Log in as the given \var{user}. The \var{passwd} and \var{acct}
+parameters are optional and default to the empty string. If no
+\var{user} is specified, it defaults to \samp{anonymous}. If
+\var{user} is \code{anonymous}, the default \var{passwd} is
+\samp{\var{realuser}@\var{host}} where \var{realuser} is the real user
+name (glanced from the \samp{LOGNAME} or \samp{USER} environment
+variable) and \var{host} is the hostname as returned by
+\code{socket.gethostname()}. This function should be called only
+once for each instance, after a connection has been established; it
+should not be called at all if a host and user were given when the
+instance was created. Most FTP commands are only allowed after the
+client has logged in.
+\end{funcdesc}
+
+\begin{funcdesc}{abort}{}
+Abort a file transfer that is in progress. Using this does not always
+work, but it's worth a try.
+\end{funcdesc}
+
+\begin{funcdesc}{sendcmd}{command}
+Send a simple command string to the server and return the response
+string.
+\end{funcdesc}
+
+\begin{funcdesc}{voidcmd}{command}
+Send a simple command string to the server and handle the response.
+Return nothing if a response code in the range 200--299 is received.
+Raise an exception otherwise.
+\end{funcdesc}
+
+\begin{funcdesc}{retrbinary}{command\, callback\, maxblocksize}
+Retrieve a file in binary transfer mode. \var{command} should be an
+appropriate \samp{RETR} command, i.e.\ \code{"RETR \var{filename}"}.
+The \var{callback} function is called for each block of data received,
+with a single string argument giving the data block.
+The \var{maxblocksize} argument specifies the maximum block size
+(which may not be the actual size of the data blocks passed to
+\var{callback}).
+\end{funcdesc}
+
+\begin{funcdesc}{retrlines}{command\optional{\, callback}}
+Retrieve a file or directory listing in \ASCII{} transfer mode.
+var{command} should be an appropriate \samp{RETR} command (see
+\code{retrbinary()} or a \samp{LIST} command (usually just the string
+\code{"LIST"}). The \var{callback} function is called for each line,
+with the trailing CRLF stripped. The default \var{callback} prints
+the line to \code{sys.stdout}.
+\end{funcdesc}
+
+\begin{funcdesc}{storbinary}{command\, file\, blocksize}
+Store a file in binary transfer mode. \var{command} should be an
+appropriate \samp{STOR} command, i.e.\ \code{"STOR \var{filename}"}.
+\var{file} is an open file object which is read until EOF using its
+\code{read()} method in blocks of size \var{blocksize} to provide the
+data to be stored.
+\end{funcdesc}
+
+\begin{funcdesc}{storlines}{command\, file}
+Store a file in \ASCII{} transfer mode. \var{command} should be an
+appropriate \samp{STOR} command (see \code{storbinary()}). Lines are
+read until EOF from the open file object \var{file} using its
+\code{readline()} method to privide the data to be stored.
+\end{funcdesc}
+
+\begin{funcdesc}{nlst}{argument\optional{\, \ldots}}
+Return a list of files as returned by the \samp{NLST} command. The
+optional var{argument} is a directory to list (default is the current
+server directory). Multiple arguments can be used to pass
+non-standard options to the \samp{NLST} command.
+\end{funcdesc}
+
+\begin{funcdesc}{dir}{argument\optional{\, \ldots}}
+Return a directory listing as returned by the \samp{LIST} command, as
+a list of lines. The optional var{argument} is a directory to list
+(default is the current server directory). Multiple arguments can be
+used to pass non-standard options to the \samp{LIST} command. If the
+last argument is a function, it is used as a \var{callback} function
+as for \code{retrlines()}.
+\end{funcdesc}
+
+\begin{funcdesc}{rename}{fromname\, toname}
+Rename file \var{fromname} on the server to \var{toname}.
+\end{funcdesc}
+
+\begin{funcdesc}{cwd}{pathname}
+Set the current directory on the server.
+\end{funcdesc}
+
+\begin{funcdesc}{mkd}{pathname}
+Create a new directory on the server.
+\end{funcdesc}
+
+\begin{funcdesc}{pwd}{}
+Return the pathname of the current directory on the server.
+\end{funcdesc}
+
+\begin{funcdesc}{quit}{}
+Send a \samp{QUIT} command to the server and close the connection.
+This is the ``polite'' way to close a connection, but it may raise an
+exception of the server reponds with an error to the \code{QUIT}
+command.
+\end{funcdesc}
+
+\begin{funcdesc}{close}{}
+Close the connection unilaterally. This should not be applied to an
+already closed connection (e.g.\ after a successful call to
+\code{quit()}.
+\end{funcdesc}