J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1994-2002 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any 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 | */ |
| 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. */ |
| 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. */ |
| 125 | public String getResponseString() { |
| 126 | return (String) serverResponse.elementAt(0); |
| 127 | } |
| 128 | |
| 129 | /** Returns all server response strings. */ |
| 130 | public Vector getResponseStrings() { |
| 131 | return serverResponse; |
| 132 | } |
| 133 | |
| 134 | /** standard constructor to host <i>host</i>, port <i>port</i>. */ |
| 135 | public TransferProtocolClient(String host, int port) throws IOException { |
| 136 | super(host, port); |
| 137 | } |
| 138 | |
| 139 | /** creates an uninitialized instance of this class. */ |
| 140 | public TransferProtocolClient() {} |
| 141 | } |