Commons Net example source code file (TFTPServerPathTest.java)

This example Commons Net source code file (TFTPServerPathTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Commons Net tags/keywords

couldn't, file, file, fileinputstream, fileinputstream, fileoutputstream, io, ioexception, ioexception, server, string, testcase, tftpclient, tftpserver, tftpserver

The Commons Net TFTPServerPathTest.java source code

/*
 * 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.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.commons.net.tftp.TFTPServer.ServerMode;

import junit.framework.TestCase;

/**
 * Some basic tests to ensure that the TFTP Server is honoring its read/write mode, and preventing
 * files from being read or written from outside of the assigned roots.
 *
 * @author <A HREF="mailto:daniel.armbrust.list@gmail.com">Dan Armbrust
 *
 */
public class TFTPServerPathTest extends TestCase
{
    String filePrefix = "tftp-";
    File serverDirectory = new File(System.getProperty("java.io.tmpdir"));

    public void testReadOnly() throws IOException
    {
        // Start a read-only server
        TFTPServer tftpS = new TFTPServer(serverDirectory, serverDirectory, 6900,
                ServerMode.GET_ONLY, null, null);

        // Create our TFTP instance to handle the file transfer.
        TFTPClient tftp = new TFTPClient();
        tftp.open();
        tftp.setSoTimeout(2000);

        // make a file to work with.
        File file = new File(serverDirectory, filePrefix + "source.txt");
        file.createNewFile();

        // Read the file from the tftp server.
        File out = new File(serverDirectory, filePrefix + "out");

        // cleanup old failed runs
        out.delete();
        assertTrue("Couldn't clear output location", !out.exists());

        FileOutputStream output = new FileOutputStream(out);

        tftp.receiveFile(file.getName(), TFTP.BINARY_MODE, output, "localhost", 6900);
        output.close();

        assertTrue("file not created", out.exists());

        out.delete();

        FileInputStream fis = new FileInputStream(file);
        try
        {
            tftp.sendFile(out.getName(), TFTP.BINARY_MODE, fis, "localhost", 6900);
            fail("Server allowed write");
        }
        catch (IOException e)
        {
            // expected path
        }
        fis.close();
        file.delete();
        tftpS.shutdown();
    }

    public void testWriteOnly() throws IOException
    {
        // Start a write-only server
        TFTPServer tftpS = new TFTPServer(serverDirectory, serverDirectory, 6900,
                ServerMode.PUT_ONLY, null, null);

        // Create our TFTP instance to handle the file transfer.
        TFTPClient tftp = new TFTPClient();
        tftp.open();
        tftp.setSoTimeout(2000);

        // make a file to work with.
        File file = new File(serverDirectory, filePrefix + "source.txt");
        file.createNewFile();

        File out = new File(serverDirectory, filePrefix + "out");

        // cleanup old failed runs
        out.delete();
        assertTrue("Couldn't clear output location", !out.exists());

        FileOutputStream output = new FileOutputStream(out);

        try
        {
            tftp.receiveFile(file.getName(), TFTP.BINARY_MODE, output, "localhost", 6900);
            fail("Server allowed read");
        }
        catch (IOException e)
        {
            // expected path
        }
        output.close();
        out.delete();

        FileInputStream fis = new FileInputStream(file);
        tftp.sendFile(out.getName(), TFTP.BINARY_MODE, fis, "localhost", 6900);

        fis.close();

        assertTrue("file not created", out.exists());

        // cleanup
        file.delete();
        out.delete();
        tftpS.shutdown();
    }

    public void testWriteOutsideHome() throws IOException
    {
        // Start a server
        TFTPServer tftpS = new TFTPServer(serverDirectory, serverDirectory, 6900,
                ServerMode.GET_AND_PUT, null, null);

        // Create our TFTP instance to handle the file transfer.
        TFTPClient tftp = new TFTPClient();
        tftp.open();

        File file = new File(serverDirectory, filePrefix + "source.txt");
        file.createNewFile();

        assertFalse("test construction error", new File(serverDirectory, "../foo").exists());

        FileInputStream fis = new FileInputStream(file);
        try
        {
            tftp.sendFile("../foo", TFTP.BINARY_MODE, fis, "localhost", 6900);
            fail("Server allowed write!");
        }
        catch (IOException e)
        {
            // expected path
        }

        fis.close();

        assertFalse("file created when it should not have been",
                new File(serverDirectory, "../foo").exists());

        // cleanup
        file.delete();

        tftpS.shutdown();
    }


}