1 /* 2 * Copyright (c) 1994, 2002, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.net; 27 28 import java.lang.StringIndexOutOfBoundsException; 29 import java.io.*; 30 import java.util.Vector; 31 import sun.net.NetworkClient; 32 33 /** 34 * This class implements that basic intefaces of transfer protocols. 35 * It is used by subclasses implementing specific protocols. 36 * 37 * @author Jonathan Payne 38 * @see sun.net.ftp.FtpClient 39 * @see sun.net.nntp.NntpClient 40 */ 41 42 public class TransferProtocolClient extends NetworkClient { 43 static final boolean debug = false; 44 45 /** Array of strings (usually 1 entry) for the last reply 46 from the server. */ 47 protected Vector serverResponse = new Vector(1); 48 49 /** code for last reply */ 50 protected int lastReplyCode; 51 52 53 /** 54 * Pulls the response from the server and returns the code as a 55 * number. Returns -1 on failure. 56 */ readServerResponse()57 public int readServerResponse() throws IOException { 58 StringBuffer replyBuf = new StringBuffer(32); 59 int c; 60 int continuingCode = -1; 61 int code; 62 String response; 63 64 serverResponse.setSize(0); 65 while (true) { 66 while ((c = serverInput.read()) != -1) { 67 if (c == '\r') { 68 if ((c = serverInput.read()) != '\n') 69 replyBuf.append('\r'); 70 } 71 replyBuf.append((char)c); 72 if (c == '\n') 73 break; 74 } 75 response = replyBuf.toString(); 76 replyBuf.setLength(0); 77 if (debug) { 78 System.out.print(response); 79 } 80 81 if (response.length() == 0) { 82 code = -1; 83 } else { 84 try { 85 code = Integer.parseInt(response.substring(0, 3)); 86 } catch (NumberFormatException e) { 87 code = -1; 88 } catch (StringIndexOutOfBoundsException e) { 89 /* this line doesn't contain a response code, so 90 we just completely ignore it */ 91 continue; 92 } 93 } 94 serverResponse.addElement(response); 95 if (continuingCode != -1) { 96 /* we've seen a XXX- sequence */ 97 if (code != continuingCode || 98 (response.length() >= 4 && response.charAt(3) == '-')) { 99 continue; 100 } else { 101 /* seen the end of code sequence */ 102 continuingCode = -1; 103 break; 104 } 105 } else if (response.length() >= 4 && response.charAt(3) == '-') { 106 continuingCode = code; 107 continue; 108 } else { 109 break; 110 } 111 } 112 113 return lastReplyCode = code; 114 } 115 116 /** Sends command <i>cmd</i> to the server. */ sendServer(String cmd)117 public void sendServer(String cmd) { 118 serverOutput.print(cmd); 119 if (debug) { 120 System.out.print("Sending: " + cmd); 121 } 122 } 123 124 /** converts the server response into a string. */ getResponseString()125 public String getResponseString() { 126 return (String) serverResponse.elementAt(0); 127 } 128 129 /** Returns all server response strings. */ getResponseStrings()130 public Vector getResponseStrings() { 131 return serverResponse; 132 } 133 134 /** standard constructor to host <i>host</i>, port <i>port</i>. */ TransferProtocolClient(String host, int port)135 public TransferProtocolClient(String host, int port) throws IOException { 136 super(host, port); 137 } 138 139 /** creates an uninitialized instance of this class. */ TransferProtocolClient()140 public TransferProtocolClient() {} 141 } 142