com.dalsemi.shell.server.ftp
Class FTPServer
java.lang.Object
|
+--java.lang.Thread
|
+--com.dalsemi.shell.server.Server
|
+--com.dalsemi.shell.server.ftp.FTPServer
- public class FTPServer
- extends Server
A simple server that uses FTP as described in RFC 959. This server uses a ServerSocket to listen
on the specified port (defaults to port 21) for FTP connection requests. For each connection made,
an FTP session is created. All command processing is handled by the FTP session, not this server.
|
Constructor Summary |
FTPServer()
Prepares the FTP server to listen on the well known FTP port (21). |
FTPServer(int port)
Prepares the FTP server to listen on an arbitrary port. |
|
Method Summary |
protected Session |
acceptNewSession()
Listens on the connection port for connection requests. |
void |
broadcast(String sendThis)
This method does not apply to an FTPServer, so it does nothing. |
protected void |
closeAllPorts()
Closes the ServerSocket used to listen for connections. |
static String |
getConnectionMsgFile()
Gets the name of the file to be displayed when a user connects to this server. |
static String |
getWelcomeMsgFile()
Gets the name of the file to be displayed when after a user logs in to this server. |
static boolean |
isAnonymousAllowed()
Indicates whether anonymous login is allowed to this FTP server. |
static boolean |
isRootAllowed()
Indicates whether root access is allowed to this FTP server. |
static String |
logAnon()
Returns the name of the file where anonymous logins should be logged. |
| Methods inherited from class java.lang.Thread |
activeCount,
checkAccess,
countStackFrames,
currentThread,
destroy,
dumpStack,
enumerate,
getName,
getPriority,
getThreadGroup,
interrupt,
interrupted,
isAlive,
isDaemon,
isInterrupted,
join,
join,
join,
resume,
setDaemon,
setName,
setPriority,
sleep,
sleep,
start,
stop,
stop,
suspend,
toString,
yield |
FTPServer
public FTPServer()
throws IOException
- Prepares the FTP server to listen on the well known FTP port (21). The server will not
be started and no connections will be accepted until its
run() method is executed.
FTPServer
public FTPServer(int port)
throws IOException
- Prepares the FTP server to listen on an arbitrary port. The server will not
be started and no connections will be accepted until its
run() method is executed.
getConnectionMsgFile
public static String getConnectionMsgFile()
- Gets the name of the file to be displayed when a user connects to this server. The
contents of this file will be displayed before the login message. This file is specified
by setting the "FTP_CONNECT" environment variable equal to the name of the file. This
method will always return the value the variable had when the server was constructed.
Changing the value of environment variable after creating the server will have no effect.
- Returns:
- the name of the connection file to display, or
null
if no connection file was specified
getWelcomeMsgFile
public static String getWelcomeMsgFile()
- Gets the name of the file to be displayed when after a user logs in to this server.
This file is specified by setting the "FTP_WELCOME" environment variable equal to
the name of the file. This method will always return the value the variable had
when the server was constructed. Changing the value of environment variable after
creating the server will have no effect.
- Returns:
- the name of the welcome file to display, or
null
if no welcome file was specified
isAnonymousAllowed
public static boolean isAnonymousAllowed()
- Indicates whether anonymous login is allowed to this FTP server. This
is specified with the environment variable "FTP_ANON_ALLOWED". Set the
variable to "false" to disallow anonymous login. All other values will
be interpreted as
true and anonymous logins will be accepted.
This method will always return the value the variable had when the server
was constructed. Changing the value of environment variable after
creating the server will have no effect.
- Returns:
true if anonymous is allowed to login
isRootAllowed
public static boolean isRootAllowed()
- Indicates whether root access is allowed to this FTP server. This
is specified with the environment variable "FTP_ROOT_ALLOWED". Set the
variable to "false" to disallow root login. All other values will
be interpreted as
true and root logins will be accepted.
This method will always return the value the variable had when the server
was constructed. Changing the value of environment variable after
creating the server will have no effect.
- Returns:
true if root is allowed to login
logAnon
public static String logAnon()
- Returns the name of the file where anonymous logins should be logged. This is specified
with the environment variable "FTP_LOG_ANON". This method will always return the value
the variable had when the server was constructed. Changing the value of environment
variable after creating the server will have no effect.
- Returns:
- the name of the ftp log file, or
null if none specified
acceptNewSession
protected Session acceptNewSession()
- Listens on the connection port for connection requests. Once a
request is made, it creates, initializes, and returns a new
FTPSession to handle that request. This method will block until
a connection is made.
- Overrides:
- acceptNewSession in class Server
- Returns:
- a new
FTPSession
closeAllPorts
protected void closeAllPorts()
throws IOException
- Closes the ServerSocket used to listen for connections.
- Overrides:
- closeAllPorts in class Server
broadcast
public void broadcast(String sendThis)
- This method does not apply to an FTPServer, so it does nothing.
- Overrides:
- broadcast in class Server
- Tags copied from class: Server
- Parameters:
sendThis - message to send to all sessions