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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 | +} | |