/*
* @(#)TransferProtocolClient.java 1.38 06/10/10
*
* Copyright 1990-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*
*/
package sun.net;
import java.lang.StringIndexOutOfBoundsException;
import java.io.*;
import java.util.Vector;
import sun.net.NetworkClient;
/**
* This class implements that basic intefaces of transfer protocols.
* It is used by subclasses implementing specific protocols.
*
* @version 1.33, 08/19/02
* @author Jonathan Payne
* @see sun.net.ftp.FtpClient
* @see sun.net.nntp.NntpClient
*/
public class TransferProtocolClient extends NetworkClient {
static final boolean debug = false;
/** Array of strings (usually 1 entry) for the last reply
from the server. */
protected Vector serverResponse = new Vector(1);
/** code for last reply */
protected int lastReplyCode;
/**
* Pulls the response from the server and returns the code as a
* number. Returns -1 on failure.
*/
public int readServerResponse() throws IOException {
StringBuffer replyBuf = new StringBuffer(32);
int c;
int continuingCode = -1;
int code;
String response;
serverResponse.setSize(0);
while (true) {
while ((c = serverInput.read()) != -1) {
if (c == '\r') {
if ((c = serverInput.read()) != '\n')
replyBuf.append('\r');
}
replyBuf.append((char) c);
if (c == '\n')
break;
}
response = replyBuf.toString();
replyBuf.setLength(0);
if (debug) {
System.out.print(response);
}
try {
code = Integer.parseInt(response.substring(0, 3));
} catch (NumberFormatException e) {
code = -1;
} catch (StringIndexOutOfBoundsException e) {
/* this line doesn't contain a response code, so
we just completely ignore it */
continue;
}
serverResponse.addElement(response);
if (continuingCode != -1) {
/* we've seen a sequence */
if (code != continuingCode ||
(response.length() >= 4 && response.charAt(3) == '-')) {
continue;
} else {
/* seen the end of code sequence */
continuingCode = -1;
break;
}
} else if (response.length() >= 4 && response.charAt(3) == '-') {
continuingCode = code;
continue;
} else {
break;
}
}
return lastReplyCode = code;
}
/** Sends command <i>cmd</i> to the server. */
public void sendServer(String cmd) {
serverOutput.print(cmd);
if (debug) {
System.out.print("Sending: " + cmd);
}
}
/** converts the server response into a string. */
public String getResponseString() {
return (String) serverResponse.elementAt(0);
}
/** Returns all server response strings. */
public Vector getResponseStrings() {
return serverResponse;
}
/** standard constructor to host <i>host</i>, port <i>port</i>. */
public TransferProtocolClient(String host, int port) throws IOException {
super(host, port);
}
/** creates an uninitialized instance of this class. */
public TransferProtocolClient() {}
}