--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/net/TransferProtocolClient.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,141 @@
+/*
+ * Copyright 1994-2002 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.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() {}
+}