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| 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 | */ | ||
| 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 | } | ||