/**
* Default constructor. Create a new FTP client and connect to a specified server.
*
* @param server Address of an FTP server
*/
public Ftp(String server) {
serverAddr = server;
debug = true;
try {
sock = new Socket(server, 21);
System.out.println("Connected to " + server);
out = new PrintWriter(sock.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(sock.getInputStream()));
System.out.println(getResponse());
} catch (IOException e) {
System.err.println(e.getMessage());
System.exit(1);
}
}
/**
* Main method which is in charge of parsing and interpreting user input and interacting with the
* FTP client.
*
* @param args Command line arguments; should only contain the server
*/
public static void main(String args[]) {
boolean eof = false;
String input = null;
Scanner in = new Scanner(System.in);
if (args.length != 1) {
System.err.println("Usage: java Ftp <server>");
System.exit(1);
}
/* Create a new FTP client */
Ftp client = new Ftp(args[0]);
do {
try {
System.out.print(prompt);
input = in.nextLine();
} catch (NoSuchElementException e) {
eof = true;
}
/* Keep going if we have not hit end of file */
if (!eof && input.length() > 0) {
int cmd = -1;
String argv[] = input.split("\\s+");
for (int i = 0; i < commands.length && cmd == -1; i++)
if (commands[i].equalsIgnoreCase(argv[0])) cmd = i;
/* Execute the command */
switch (cmd) {
case ASCII:
client.ascii();
break;
case BINARY:
client.binary();
break;
case CD:
client.cd(argv[1]);
break;
case CDUP:
client.cdup();
break;
case DEBUG:
client.toggleDebug();
break;
case DIR:
client.dir();
break;
case GET:
client.get(argv[1]);
break;
case HELP:
for (int i = 0; i < HELP_MESSAGE.length; i++) System.out.println(HELP_MESSAGE[i]);
break;
case PASSIVE:
client.pasv();
break;
case PWD:
client.pwd();
break;
case QUIT:
eof = true;
break;
case USER:
client.user(argv[1]);
String password = PasswordField.getPassword("Password: "******"Invalid command");
}
}
} while (!eof);
/* Clean up */
client.close();
}