/*
* @(#)TransferProtocolClient.java 1.23 95/12/07 Jonathan Payne
*
* Copyright (c) 1994 Sun Microsystems, Inc. All Rights Reserved.
*
* Permission to use, copy, modify, and distribute this software
* and its documentation for NON-COMMERCIAL purposes and without
* fee is hereby granted provided that this copyright notice
* appears in all copies. Please refer to the file "copyright.html"
* for further important copyright and licensing information.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
* THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
* TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
*/
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 1.23, 07 Dec 1995
* @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 XXX- 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() {}
}