Basic upload functionality to predifined location, with basic file browser

1 files changed, 253 insertions, 0 deletions

diff --git a/org/apache/commons/net/tftp/TFTPRequestPacket.java b/org/apache/commons/net/tftp/TFTPRequestPacket.java
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+/*

+ * Licensed to the Apache Software Foundation (ASF) under one or more

+ * contributor license agreements.  See the NOTICE file distributed with

+ * this work for additional information regarding copyright ownership.

+ * The ASF licenses this file to You under the Apache License, Version 2.0

+ * (the "License"); you may not use this file except in compliance with

+ * the License.  You may obtain a copy of the License at

+ *

+ *      http://www.apache.org/licenses/LICENSE-2.0

+ *

+ * Unless required by applicable law or agreed to in writing, software

+ * distributed under the License is distributed on an "AS IS" BASIS,

+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

+ * See the License for the specific language governing permissions and

+ * limitations under the License.

+ */

+

+package org.apache.commons.net.tftp;

+

+import java.net.DatagramPacket;

+import java.net.InetAddress;

+

+/***

+ * An abstract class derived from TFTPPacket definiing a TFTP Request

+ * packet type.  It is subclassed by the

+ * {@link org.apache.commons.net.tftp.TFTPReadRequestPacket}

+ *   and

+ * {@link org.apache.commons.net.tftp.TFTPWriteRequestPacket}

+ *  classes.

+ * <p>

+ * Details regarding the TFTP protocol and the format of TFTP packets can

+ * be found in RFC 783.  But the point of these classes is to keep you

+ * from having to worry about the internals.  Additionally, only very

+ * few people should have to care about any of the TFTPPacket classes

+ * or derived classes.  Almost all users should only be concerned with the

+ * {@link org.apache.commons.net.tftp.TFTPClient} class

+ * {@link org.apache.commons.net.tftp.TFTPClient#receiveFile receiveFile()}

+ * and

+ * {@link org.apache.commons.net.tftp.TFTPClient#sendFile sendFile()}

+ * methods.

+ * <p>

+ * <p>

+ * @author Daniel F. Savarese

+ * @see TFTPPacket

+ * @see TFTPReadRequestPacket

+ * @see TFTPWriteRequestPacket

+ * @see TFTPPacketException

+ * @see TFTP

+ ***/

+

+public abstract class TFTPRequestPacket extends TFTPPacket

+{

+    /***

+     * An array containing the string names of the transfer modes and indexed

+     * by the transfer mode constants.

+     ***/

+    static final String[] _modeStrings = { "netascii", "octet" };

+

+    /***

+     * A null terminated byte array representation of the ascii names of the

+     * transfer mode constants.  This is convenient for creating the TFTP

+     * request packets.

+     ***/

+    static final byte[] _modeBytes[] = {

+                                           { (byte)'n', (byte)'e', (byte)'t', (byte)'a', (byte)'s', (byte)'c',

+                                             (byte)'i', (byte)'i', 0 },

+                                           { (byte)'o', (byte)'c', (byte)'t', (byte)'e', (byte)'t', 0 }

+                                       };

+

+    /*** The transfer mode of the request. ***/

+    int _mode;

+

+    /*** The filename of the request. ***/

+    String _filename;

+

+    /***

+     * Creates a request packet of a given type to be sent to a host at a

+     * given port with a filename and transfer mode request.

+     * <p>

+     * @param destination  The host to which the packet is going to be sent.

+     * @param port  The port to which the packet is going to be sent.

+     * @param type The type of the request (either TFTPPacket.READ_REQUEST or

+     *             TFTPPacket.WRITE_REQUEST).

+     * @param filename The requested filename.

+     * @param mode The requested transfer mode.  This should be on of the TFTP

+     *        class MODE constants (e.g., TFTP.NETASCII_MODE).

+     ***/

+    TFTPRequestPacket(InetAddress destination, int port,

+                      int type, String filename, int mode)

+    {

+        super(type, destination, port);

+

+        _filename = filename;

+        _mode = mode;

+    }

+

+    /***

+     * Creates a request packet of a given type based on a received

+     * datagram.  Assumes the datagram is at least length 4, else an

+     * ArrayIndexOutOfBoundsException may be thrown.

+     * <p>

+     * @param type The type of the request (either TFTPPacket.READ_REQUEST or

+     *             TFTPPacket.WRITE_REQUEST).

+     * @param datagram  The datagram containing the received request.

+     * @throws TFTPPacketException  If the datagram isn't a valid TFTP

+     *         request packet of the appropriate type.

+     ***/

+    TFTPRequestPacket(int type, DatagramPacket datagram)

+    throws TFTPPacketException

+    {

+        super(type, datagram.getAddress(), datagram.getPort());

+

+        byte[] data;

+        int index, length;

+        String mode;

+        StringBuffer buffer;

+

+        data = datagram.getData();

+

+        if (getType() != data[1])

+            throw new TFTPPacketException("TFTP operator code does not match type.");

+

+        buffer = new StringBuffer();

+

+        index = 2;

+        length = datagram.getLength();

+

+        while (index < length && data[index] != 0)

+        {

+            buffer.append((char)data[index]);

+            ++index;

+        }

+

+        _filename = buffer.toString();

+

+        if (index >= length)

+            throw new TFTPPacketException("Bad filename and mode format.");

+

+        buffer.setLength(0);

+        ++index; // need to advance beyond the end of string marker

+        while (index < length && data[index] != 0)

+        {

+            buffer.append((char)data[index]);

+            ++index;

+        }

+

+        mode = buffer.toString().toLowerCase(java.util.Locale.ENGLISH);

+        length = _modeStrings.length;

+

+        for (index = 0; index < length; index++)

+        {

+            if (mode.equals(_modeStrings[index]))

+            {

+                _mode = index;

+                break;

+            }

+        }

+

+        if (index >= length)

+        {

+            throw new TFTPPacketException("Unrecognized TFTP transfer mode: " + mode);

+            // May just want to default to binary mode instead of throwing

+            // exception.

+            //_mode = TFTP.OCTET_MODE;

+        }

+    }

+

+

+    /***

+     * This is a method only available within the package for

+     * implementing efficient datagram transport by elminating buffering.

+     * It takes a datagram as an argument, and a byte buffer in which

+     * to store the raw datagram data.  Inside the method, the data

+     * is set as the datagram's data and the datagram returned.

+     * <p>

+     * @param datagram  The datagram to create.

+     * @param data The buffer to store the packet and to use in the datagram.

+     * @return The datagram argument.

+     ***/

+    @Override

+    final DatagramPacket _newDatagram(DatagramPacket datagram, byte[] data)

+    {

+        int fileLength, modeLength;

+

+        fileLength = _filename.length();

+        modeLength = _modeBytes[_mode].length;

+

+        data[0] = 0;

+        data[1] = (byte)_type;

+        System.arraycopy(_filename.getBytes(), 0, data, 2, fileLength);

+        data[fileLength + 2] = 0;

+        System.arraycopy(_modeBytes[_mode], 0, data, fileLength + 3,

+                         modeLength);

+

+        datagram.setAddress(_address);

+        datagram.setPort(_port);

+        datagram.setData(data);

+        datagram.setLength(fileLength + modeLength + 3);

+        

+        return datagram;

+    }

+

+    /***

+     * Creates a UDP datagram containing all the TFTP

+     * request packet data in the proper format.

+     * This is a method exposed to the programmer in case he

+     * wants to implement his own TFTP client instead of using

+     * the {@link org.apache.commons.net.tftp.TFTPClient}

+     * class.  Under normal circumstances, you should not have a need to call

+     * this method.

+     * <p>

+     * @return A UDP datagram containing the TFTP request packet.

+     ***/

+    @Override

+    public final DatagramPacket newDatagram()

+    {

+        int fileLength, modeLength;

+        byte[] data;

+

+        fileLength = _filename.length();

+        modeLength = _modeBytes[_mode].length;

+

+        data = new byte[fileLength + modeLength + 4];

+        data[0] = 0;

+        data[1] = (byte)_type;

+        System.arraycopy(_filename.getBytes(), 0, data, 2, fileLength);

+        data[fileLength + 2] = 0;

+        System.arraycopy(_modeBytes[_mode], 0, data, fileLength + 3,

+                         modeLength);

+

+        return new DatagramPacket(data, data.length, _address, _port);

+    }

+

+    /***

+     * Returns the transfer mode of the request.

+     * <p>

+     * @return The transfer mode of the request.

+     ***/

+    public final int getMode()

+    {

+        return _mode;

+    }

+

+    /***

+     * Returns the requested filename.

+     * <p>

+     * @return The requested filename.

+     ***/

+    public final String getFilename()

+    {

+        return _filename;

+    }

+}