Undo refactoring.. Classes are working again. Could not find the mistake :/

1 files changed, 293 insertions, 29 deletions

diff --git a/src/main/java/org/openslx/filetransfer/Downloader.java b/src/main/java/org/openslx/filetransfer/Downloader.java
index d9e41a5..c860f5e 100644
--- a/src/main/java/org/openslx/filetransfer/Downloader.java
+++ b/src/main/java/org/openslx/filetransfer/Downloader.java
@@ -1,46 +1,74 @@
 package org.openslx.filetransfer;
 
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
 import java.io.File;
 import java.io.IOException;
 import java.io.RandomAccessFile;
 import java.net.SocketTimeoutException;
+import java.nio.charset.StandardCharsets;
 
 import javax.net.ssl.SSLContext;
 import javax.net.ssl.SSLSocket;
+import javax.net.ssl.SSLSocketFactory;
 
 import org.apache.log4j.Logger;
 
-public class Downloader extends Transfer
+public class Downloader
 {
 	// Some instance variables.
+	private SSLSocketFactory sslSocketFactory;
+	private SSLSocket satelliteSocket;
+	private DataOutputStream dataToServer;
+	private DataInputStream dataFromServer;
+	private String TOKEN = null;
+	private String RANGE = null;
 	private String outputFilename = null;
+	private String ERROR = null;
 
-	private static final Logger log = Logger.getLogger( Downloader.class );
+	private static Logger log = Logger.getLogger( Downloader.class );
 
 	/***********************************************************************/
 	/**
-	 * Actively initiate a connection to a remote peer for downloading.
+	 * Constructor for satellite downloader.
+	 * Tries to connect to specific ip and port and sending type of action.
 	 * 
-	 * @param host Host name or address to connect to
-	 * @param port Port to connect to
-	 * @throws IOException
+	 * @param ip
+	 * @param port
 	 */
-	public Downloader( String host, int port, SSLContext context ) throws IOException
+	public Downloader( String ip, int port, SSLContext context )
 	{
-		super( host, port, context, log );
-		dataToServer.writeByte( 'D' );
+		try {
+			// create socket.
+			sslSocketFactory = context.getSocketFactory();
+
+			satelliteSocket = (SSLSocket)sslSocketFactory.createSocket( ip, port );
+			satelliteSocket.setSoTimeout( 2000 ); // set socket timeout.
+
+			dataToServer = new DataOutputStream( satelliteSocket.getOutputStream() );
+			dataToServer.writeByte( 'D' );
+			dataFromServer = new DataInputStream( satelliteSocket.getInputStream() );
+		} catch ( Exception e ) {
+			e.printStackTrace();
+		}
 	}
 
 	/***********************************************************************/
 	/**
-	 * Constructor used by Listener to create an incoming download connection.
+	 * Constructor for master downloader.
+	 * Given parameter is the socket over which the transfer is going.
 	 * 
-	 * @param socket established connection to peer which requested an upload.
-	 * @throws IOException 
+	 * @param socket
 	 */
-	protected Downloader( SSLSocket socket ) throws IOException
+	public Downloader( SSLSocket socket )
 	{
-		super( socket, log );
+		try {
+			satelliteSocket = socket;
+			dataToServer = new DataOutputStream( satelliteSocket.getOutputStream() );
+			dataFromServer = new DataInputStream( satelliteSocket.getInputStream() );
+		} catch ( IOException e ) {
+			e.printStackTrace();
+		}
 	}
 
 	/***********************************************************************/
@@ -67,16 +95,211 @@ public class Downloader extends Transfer
 
 	/***********************************************************************/
 	/**
-	 * Method to request a byte range within the file to download. This
-	 * method is called by the party that initiated the connection.
+	 * Method for sending token for identification from satellite to master.
+	 * 
+	 * @param t
+	 */
+	public Boolean sendToken( String token )
+	{
+		try {
+			TOKEN = token;
+			String sendToken = "TOKEN=" + TOKEN;
+			byte[] data = sendToken.getBytes( StandardCharsets.UTF_8 );
+			dataToServer.writeByte( data.length );
+			dataToServer.write( data );
+		} catch ( SocketTimeoutException ste ) {
+			ste.printStackTrace();
+			log.info( "Socket timeout occured ... close connection." );
+			this.close();
+		} catch ( IOException e ) {
+			e.printStackTrace();
+			readMetaData();
+			if ( ERROR != null ) {
+				if ( ERROR == "timeout" ) {
+					log.info( "Socket timeout occured ... close connection." );
+					this.close();
+				}
+			}
+			log.info( "Sending TOKEN in Downloader failed..." );
+			return false;
+		}
+		return true;
+	}
+
+	/***********************************************************************/
+	/**
+	 * Method to send range of the file, which should be uploaded.
+	 * Helpful for knowing how much was already uploaded if
+	 * connection aborts.
+	 * 
+	 * @param a
+	 * @param b
+	 */
+	public Boolean sendRange( int a, int b )
+	{
+		try {
+			RANGE = a + ":" + b;
+			String sendRange = "RANGE=" + RANGE;
+			byte[] data = sendRange.getBytes( StandardCharsets.UTF_8 );
+			dataToServer.writeByte( data.length );
+			dataToServer.write( data );
+		} catch ( SocketTimeoutException ste ) {
+			ste.printStackTrace();
+			log.info( "Socket timeout occured ... close connection." );
+			this.close();
+		} catch ( IOException e ) {
+			e.printStackTrace();
+			readMetaData();
+			if ( ERROR != null ) {
+				if ( ERROR == "timeout" ) {
+					log.info( "Socket timeout occured ... close connection." );
+					this.close();
+				}
+			}
+			log.info( "Sending RANGE in Uploader failed..." );
+			return false;
+		}
+		return true;
+	}
+
+	/***********************************************************************/
+	/**
+	 * Method for reading incoming token for identification.
 	 * 
-	 * @param startOffset offset in file where to start the transfer (inclusive)
-	 * @param endOffset end offset where to end the transfer (exclusive)
-	 * @return success or failure
 	 */
-	public boolean requestRange( long startOffset, long endOffset )
+	public String getToken()
 	{
-		return super.sendRange( startOffset, endOffset );
+		return TOKEN;
+	}
+
+	/***********************************************************************/
+	/**
+	 * Method for reading range of file, which is downloaded.
+	 * Helpful for knowing how much is already downloaded if connection aborts.
+	 */
+	public String getRange()
+	{
+		return RANGE;
+	}
+
+	/***********************************************************************/
+	/**
+	 * Getter for beginning of RANGE.
+	 * 
+	 * @return
+	 */
+	public int getStartOfRange()
+	{
+		if ( RANGE != null ) {
+			String[] splitted = RANGE.split( ":" );
+			return Integer.parseInt( splitted[0] );
+		}
+		return -1;
+	}
+
+	/***********************************************************************/
+	/**
+	 * Getter for end of RANGE.
+	 * 
+	 * @return
+	 */
+	public int getEndOfRange()
+	{
+		if ( RANGE != null ) {
+			String[] splitted = RANGE.split( ":" );
+			return Integer.parseInt( splitted[1] );
+		}
+		return -1;
+	}
+
+	/***********************************************************************/
+	/**
+	 * Method for returning difference of current Range.
+	 * 
+	 * @return
+	 */
+	public int getDiffOfRange()
+	{
+		int diff = Math.abs( getEndOfRange() - getStartOfRange() );
+		return diff;
+	}
+
+	/***********************************************************************/
+	/**
+	 * Method for reading MetaData, like TOKEN and FileRange.
+	 * Split incoming bytes after first '=' and store value to specific
+	 * variable.
+	 * 
+	 */
+	public Boolean readMetaData()
+	{
+		try {
+			while ( true ) {
+				byte[] incoming = new byte[ 255 ]; // TODO: problematische Größe.
+
+				// First get length.
+				int retLengthByte;
+				retLengthByte = dataFromServer.read( incoming, 0, 1 );
+				if (retLengthByte != 1) {
+					this.close();
+					return false;
+				}
+				
+				int length = incoming[0] & 0xFF;
+				log.info( "length (downloader): " + length );
+
+				if ( length == 0 )
+					break;
+
+				/**
+				 * Read the next available bytes and split by '=' for
+				 * getting TOKEN or RANGE.
+				 */
+				int hasRead = 0;
+				while ( hasRead < length ) {
+					int ret = dataFromServer.read( incoming, hasRead, length - hasRead );
+					if ( ret == -1 ) {
+						log.info( "Error occured while reading Metadata." );
+						return false;
+					}
+					hasRead += ret;
+				}
+
+				String data = new String( incoming, 0, length, "UTF-8" );
+				// System.out.println(data);
+
+				String[] splitted = data.split( "=" );
+				// System.out.println("splitted[0]: " + splitted[0]);
+				// System.out.println("splitted[1]: " + splitted[1]);
+				if ( splitted[0] != null && splitted[0].equals( "TOKEN" ) ) {
+					if ( splitted[1] != null )
+						TOKEN = splitted[1];
+					log.info( "TOKEN: " + TOKEN );
+				}
+				else if ( splitted[0].equals( "RANGE" ) ) {
+					if ( splitted[1] != null )
+						RANGE = splitted[1];
+					log.info( "RANGE: '" + RANGE + "'" );
+				}
+				else if ( splitted[0].equals( "ERROR" ) ) {
+					if ( splitted[1] != null )
+						ERROR = splitted[1];
+					log.info( "ERROR: " + ERROR );
+					return false;
+				}
+			}
+		} catch ( SocketTimeoutException ste ) {
+			ste.printStackTrace();
+			sendErrorCode( "timeout" );
+			log.info( "Socket Timeout occured in Downloader." );
+			this.close();
+			return false;
+		} catch ( Exception e ) {
+			e.printStackTrace();
+			this.close();
+			return false;
+		}
+		return true;
 	}
 
 	/***********************************************************************/
@@ -84,20 +307,21 @@ public class Downloader extends Transfer
 	 * Method for reading Binary. Reading the current Range of incoming binary.
 	 * 
 	 */
-	public boolean receiveBinary()
+	public Boolean readBinary()
 	{
 		RandomAccessFile file = null;
 		try {
-			int chunkLength = getDiffOfRange();
-			byte[] incoming = new byte[ 64000 ];
+			int length = getDiffOfRange();
+			byte[] incoming = new byte[ 4000 ]; 
 			int hasRead = 0;
 			file = new RandomAccessFile( new File( outputFilename ), "rw" );
 			file.seek( getStartOfRange() );
-			while ( hasRead < chunkLength ) {
-				int ret = dataFromServer.read( incoming, 0, Math.min( chunkLength - hasRead, incoming.length ) );
+			while ( hasRead < length ) {
+				int ret = dataFromServer.read( incoming, 0, Math.min( length - hasRead, incoming.length ) );
 				// log.info("hasRead: " + hasRead + " length: " + length + " ret: " + ret); 
 				if ( ret == -1 ) {
-					log.info( "Error occured while receiving payload." );
+					log.info( "Error occured in Downloader.readBinary(),"
+							+ " while reading binary." );
 					return false;
 				}
 				hasRead += ret;
@@ -109,7 +333,6 @@ public class Downloader extends Transfer
 			sendErrorCode( "timeout" );
 			log.info( "Socket timeout occured ... close connection." );
 			this.close();
-			return false;
 		} catch ( Exception e ) {
 			e.printStackTrace();
 			log.info( "Reading RANGE " + getStartOfRange() + ":" + getEndOfRange()
@@ -124,8 +347,49 @@ public class Downloader extends Transfer
 					e.printStackTrace();
 				}
 			}
-			RANGE = null; // Reset range for next iteration
 		}
 		return true;
 	}
+
+	/***********************************************************************/
+	/**
+	 * Method for sending error Code to server. For example in case of wrong
+	 * token, send code for wrong token.
+	 * 
+	 */
+	public Boolean sendErrorCode( String errString )
+	{
+		try {
+			String sendError = "ERROR=" + errString;
+			byte[] data = sendError.getBytes( StandardCharsets.UTF_8 );
+			dataToServer.writeByte( data.length );
+			dataToServer.write( data );
+		} catch ( IOException e ) {
+			e.printStackTrace();
+			this.close();
+			return false;
+		}
+		return true;
+	}
+
+	/***********************************************************************/
+	/**
+	 * Method for closing connection, if download has finished.
+	 * 
+	 */
+	public void close()
+	{
+		try {
+			if ( satelliteSocket != null ) {
+				this.satelliteSocket.close();
+				satelliteSocket = null;
+			}
+			if ( dataFromServer != null )
+				dataFromServer.close();
+			if ( dataToServer != null )
+				dataToServer.close();
+		} catch ( IOException e ) {
+			e.printStackTrace();
+		}
+	}
 }