| /* |
| * Copyright (c) 1994, 2002, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 in the LICENSE file that |
| * accompanied this code). |
| * |
| * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.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. |
| * |
| * @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); |
| } |
| |
| if (response.length() == 0) { |
| code = -1; |
| } else { |
| 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() {} |
| } |