Commons Net example source code file (TFTPTest.java)

This example Commons Net source code file (TFTPTest.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

bufferedinputstream, couldn't, exception, exception, file, file, fileinputstream, fileinputstream, fileoutputstream, inputstream, io, ioexception, ioexception, tftpclient, tftpserver

The Commons Net TFTPTest.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.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

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

import junit.framework.TestCase;

/**
 * Test the TFTP Server and TFTP Client by creating some files in the system temp folder and then
 * uploading and downloading them.
 *
 * @author <A HREF="mailto:daniel.armbrust.list@gmail.com">Dan Armbrust
 *
 */
public class TFTPTest extends TestCase
{
    private static TFTPServer tftpS;
    private static final File serverDirectory = new File(System.getProperty("java.io.tmpdir"));
    private static final String filePrefix = "tftp-";
    private static final File[] files = new File[8];

    static int testsLeftToRun = 6;

    // only want to do this once...
    static
    {
        try
        {
            files[0] = createFile(new File(serverDirectory, filePrefix + "empty.txt"), 0);
            files[1] = createFile(new File(serverDirectory, filePrefix + "small.txt"), 1);
            files[2] = createFile(new File(serverDirectory, filePrefix + "511.txt"), 511);
            files[3] = createFile(new File(serverDirectory, filePrefix + "512.txt"), 512);
            files[4] = createFile(new File(serverDirectory, filePrefix + "513.txt"), 513);
            files[5] = createFile(new File(serverDirectory, filePrefix + "med.txt"), 1000 * 1024);
            files[6] = createFile(new File(serverDirectory, filePrefix + "big.txt"), 5000 * 1024);
            files[7] = createFile(new File(serverDirectory, filePrefix + "huge.txt"), 37000 * 1024);

            // Start the server
            tftpS = new TFTPServer(serverDirectory, serverDirectory, 6900, ServerMode.GET_AND_PUT,
                    null, null);
            tftpS.setSocketTimeout(2000);
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }

    }

    @Override
    protected void tearDown() throws Exception
    {
        testsLeftToRun--;
        if (testsLeftToRun <= 0)
        {
            if (tftpS != null)
            {
                tftpS.shutdown();
            }
            for (int i = 0; i < files.length; i++)
            {
                files[i].delete();
            }
        }
        super.tearDown();
    }

    /*
     * Create a file, size specified in bytes
     */
    private static File createFile(File file, int size) throws IOException
    {
        OutputStream os = new BufferedOutputStream(new FileOutputStream(file));
        byte[] temp = "0".getBytes();
        for (int i = 0; i < size; i++)
        {
            os.write(temp);
        }
        os.close();
        return file;
    }

    public void testTFTPBinaryDownloads() throws Exception
    {
        // test with the smaller files
        for (int i = 0; i < 6; i++)
        {
            testDownload(TFTP.BINARY_MODE, files[i]);
        }
    }

    public void testASCIIDownloads() throws Exception
    {
        // test with the smaller files
        for (int i = 0; i < 6; i++)
        {
            try {
                testDownload(TFTP.ASCII_MODE, files[i]);
            } catch (IOException e) {
                fail("Entry "+i+" Error "+e.toString());
            }

        }
    }

    public void testTFTPBinaryUploads() throws Exception
    {
        // test with the smaller files
        for (int i = 0; i < 6; i++)
        {
            testUpload(TFTP.BINARY_MODE, files[i]);
        }
    }

    public void testASCIIUploads() throws Exception
    {
        // test with the smaller files
        for (int i = 0; i < 6; i++)
        {
            testUpload(TFTP.ASCII_MODE, files[i]);
        }
    }

    public void testHugeUploads() throws Exception
    {
        for (int i = 5; i < files.length; i++)
        {
            testUpload(TFTP.BINARY_MODE, files[i]);
        }
    }

    public void testHugeDownloads() throws Exception
    {
        // test with the smaller files
        for (int i = 5; i < files.length; i++)
        {
            testDownload(TFTP.BINARY_MODE, files[i]);
        }
    }

    private void testDownload(int mode, File file) throws IOException
    {
        // Create our TFTP instance to handle the file transfer.
        TFTPClient tftp = new TFTPClient();
        tftp.open();
        tftp.setSoTimeout(2000);

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

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

        FileOutputStream output = new FileOutputStream(out);

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

        assertTrue("file not created", out.exists());
        assertTrue("files not identical on file " + file, filesIdentical(out, file));

        // delete the downloaded file
        out.delete();
    }

    private void testUpload(int mode, File file) throws Exception
    {
        // Create our TFTP instance to handle the file transfer.
        TFTPClient tftp = new TFTPClient();
        tftp.open();
        tftp.setSoTimeout(2000);

        File in = new File(serverDirectory, filePrefix + "upload");
        // cleanup old failed runs
        in.delete();
        assertTrue("Couldn't clear output location", !in.exists());

        FileInputStream fis = new FileInputStream(file);
        tftp.sendFile(in.getName(), mode, fis, "localhost", 6900);
        fis.close();

        // need to give the server a bit of time to receive our last packet, and
        // close out its file buffers, etc.
        Thread.sleep(100);
        assertTrue("file not created", in.exists());
        assertTrue("files not identical on file " + file, filesIdentical(file, in));

        in.delete();
    }

    private boolean filesIdentical(File a, File b) throws IOException
    {
        if (!a.exists() || !b.exists())
        {
            return false;
        }

        if (a.length() != b.length())
        {
            return false;
        }

        InputStream fisA = new BufferedInputStream(new FileInputStream(a));
        InputStream fisB = new BufferedInputStream(new FileInputStream(b));

        int aBit = fisA.read();
        int bBit = fisB.read();

        while (aBit != -1)
        {
            if (aBit != bBit)
            {
                fisA.close();
                fisB.close();
                return false;
            }
            aBit = fisA.read();
            bBit = fisB.read();
        }

        fisA.close();
        fisB.close();
        return true;
    }
}