Add TCP support

Fixes #7

src/clientP2P/ClientManagementTCP.java

@@ -0,0 +1,224 @@
+package clientP2P;
+import exception.InternalError;
+import exception.ProtocolError;
+import exception.SizeError;
+import exception.TransmissionError;
+import exception.VersionError;
+import remoteException.EmptyFile;
+import remoteException.EmptyDirectory;
+import remoteException.InternalRemoteError;
+import remoteException.NotFound;
+import remoteException.ProtocolRemoteError;
+import remoteException.VersionRemoteError;
+import java.net.UnknownHostException;
+import java.util.Scanner;
+import java.net.InetAddress;
+import java.net.SocketException;
+import java.net.Socket;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.io.File;
+import java.nio.file.Paths;
+import java.nio.file.StandardOpenOption;
+import protocolP2P.ProtocolP2PPacketTCP;
+import protocolP2P.Payload;
+import protocolP2P.RequestResponseCode;
+import protocolP2P.FileList;
+import protocolP2P.FilePart;
+import protocolP2P.LoadRequest;
+
+/** Implementation of P2P-JAVA-PROJECT CLIENT
+ * @author	Louis Royer
+ * @author	Flavien Haas
+ * @author	JS Auge
+ * @version	1.0
+ */
+public class ClientManagementTCP implements Runnable {
+	private String baseDirectory;
+	private int TCPPort;
+	private String host;
+	private Socket socket;
+
+
+
+	/** Constructor for TCP implementation, with baseDirectory and TCPPort parameters.
+	 * @param baseDirectory	the root directory where files are stored
+	 * @param host	hostname of the server
+	 * @param TCPPort	the server will listen on this port
+	 */
+	public ClientManagementTCP(String baseDirectory, String host, int TCPPort) {
+		this.baseDirectory = baseDirectory;
+		this.host = host;
+		this.TCPPort = TCPPort;
+		try {
+			socket = new Socket(InetAddress.getByName(host), TCPPort);
+		} catch (SocketException e) {
+			System.err.println("Error: No TCP socket available.");
+			System.exit(-1);
+		} catch (UnknownHostException e) {
+			System.err.println("Error: Unknown host.");
+			System.exit(-1);
+		} catch (IOException e) {
+			System.err.println("Error: Cannot create TCP socket");
+			System.exit(-1);
+		}
+	}
+
+	/** Implementation of Runnable
+	 */
+	public void run() {
+		try {
+			String[] list = listDirectory();
+			System.out.println("Files present on the server:");
+			for(String listItem: list) {
+				System.out.println(listItem);
+			}
+			System.out.println("Name of the file to download:");
+			Scanner scanner = new Scanner(System.in);
+			String f = scanner.nextLine();
+			download(f);
+			System.out.println("File sucessfully downloaded");
+		} catch (EmptyDirectory e) {
+			System.err.println("Error: Server has no file in directory");
+		} catch (InternalError e) {
+			System.err.println("Error: Client internal error");
+		} catch (UnknownHostException e) {
+			System.err.println("Error: Server host is unknown");
+		} catch (IOException e) {
+			System.err.println("Error: Request cannot be send or response cannot be received");
+		} catch (TransmissionError e) {
+			System.err.println("Error: Message received is too big");
+		} catch (ProtocolError e) {
+			System.err.println("Error: Cannot decode server’s response");
+		} catch (VersionError e) {
+			System.err.println("Error: Server’s response use bad version of the protocol");
+		} catch (SizeError e) {
+			System.err.println("Error: Cannot handle this packets because of internal representation limitations of numbers on the client");
+		} catch (InternalRemoteError e) {
+			System.err.println("Error: Server internal error");
+		} catch (ProtocolRemoteError e) {
+			System.err.println("Error: Server cannot decode client’s request");
+		} catch (VersionRemoteError e) {
+			System.err.println("Error: Server cannot decode this version of the protocol");
+		} catch (NotFound e) {
+			System.err.println("Error: Server has not this file in directory");
+		} catch (EmptyFile e) {
+			System.err.println("Error: File is empty");
+		}
+	}
+
+	/** Try to download a file
+	 * @param filename	name of the file to download
+	 * @throws	NotFound
+	 * @throws	InternalError
+	 * @throws	UnknownHostException
+	 * @throws	IOException
+	 * @throws	TransmissionError
+	 * @throws	ProtocolError
+	 * @throws	VersionError
+	 * @throws	SizeError
+	 * @throws	InternalRemoteError
+	 * @throws	ProtocolRemoteError
+	 * @throws	VersionRemoteError
+	 * @throws	EmptyFile
+	 */
+	private void download(String filename) throws EmptyFile, NotFound, InternalError, UnknownHostException, IOException, TransmissionError, ProtocolError, VersionError, SizeError, InternalRemoteError, ProtocolRemoteError, VersionRemoteError {
+		final long MAX_PARTIAL_SIZE = 1024;
+		ProtocolP2PPacketTCP d = new ProtocolP2PPacketTCP((Payload) new LoadRequest(filename, 0, MAX_PARTIAL_SIZE));
+		d.sendRequest((Object)socket);
+		boolean fileFullyWritten = false;
+		long offset = 0;
+		do {
+			try {
+				Payload p = d.receiveResponse().getPayload();
+				assert p instanceof FilePart : "This payload must be instance of FilePart";
+				if (!(p instanceof FilePart)) {
+					throw new InternalError();
+				} else {
+					FilePart fp = (FilePart)p;
+					if (!fp.getFilename().equals(filename)) {
+						System.err.println("Error: wrong file received: `" + fp.getFilename() + "`");
+						throw new ProtocolError();
+					}
+					if (fp.getOffset() == 0) {
+						System.err.println("Receiving first partialContent");
+						// first partialContent
+						// increment offset
+						offset = fp.getPartialContent().length;
+						/* write first partialContent */
+						try {
+							Files.write(new File(baseDirectory + filename).toPath(), fp.getPartialContent());
+						} catch (IOException e) {
+							System.err.println("Error: cannot write file (" + baseDirectory + filename + ")");
+						}
+						// next partialContentRequest
+						if (offset != fp.getTotalSize()) {
+							System.err.println("Sending following request with offset: " + offset + " maxpartialsize: " + MAX_PARTIAL_SIZE);
+							d = new ProtocolP2PPacketTCP((Payload) new LoadRequest(filename, offset, MAX_PARTIAL_SIZE));
+							d.sendRequest((Object)socket);
+						} else {
+							fileFullyWritten = true;
+						}
+					} else if (offset == fp.getOffset()){
+						System.err.println("Receiving following partialContent (offset: " + offset + ")");
+						// following
+						// increment offset
+						offset += fp.getPartialContent().length;
+						/* write following partialContent at end of file*/
+						try {
+							Files.write(Paths.get(baseDirectory + filename), fp.getPartialContent(), StandardOpenOption.APPEND);
+						} catch (IOException e) {
+							System.err.println("Error: cannot write file (" + baseDirectory + filename + ")");
+						}
+						if (offset >= fp.getTotalSize()) {
+							fileFullyWritten = true;
+						} else {
+							// next partialContentRequest
+							d = new ProtocolP2PPacketTCP((Payload) new LoadRequest(filename, offset, MAX_PARTIAL_SIZE));
+							d.sendRequest((Object)socket);
+						}
+					
+					} else {
+						System.err.println("offset: " + fp.getOffset() + " ; content.length: " + fp.getPartialContent().length + " ; totalSize: " + fp.getTotalSize());
+						System.err.println("Error: cannot handle non-consecutive partial files (not implemented)");
+						throw new InternalError();
+					}
+				}
+			} catch (EmptyDirectory e) {
+				throw new ProtocolError();
+			}
+		} while(!fileFullyWritten);
+	}
+
+	/** list server’s directory content
+	 * @return	list of files
+	 * @throws	InternalError
+	 * @throws	UnknowHostException
+	 * @throws	IOException
+	 * @throws	TransmissionError
+	 * @throws	ProtocolError
+	 * @throws	VersionError
+	 * @throws	SizeError
+	 * @throws	EmptyDirectory
+	 * @throws	InternalRemoteError
+	 * @throws	ProtocolRemoteError
+	 * @throws	VersionRemoteError
+	 */
+	private String[] listDirectory() throws EmptyDirectory, InternalError, UnknownHostException, IOException, TransmissionError, ProtocolError, VersionError, SizeError, InternalRemoteError, ProtocolRemoteError, VersionRemoteError {
+		ProtocolP2PPacketTCP d = new ProtocolP2PPacketTCP(new Payload(RequestResponseCode.LIST_REQUEST));
+		d.sendRequest((Object)socket);
+		try {
+			Payload p = d.receiveResponse().getPayload();
+			assert p instanceof FileList : "This payload must be instance of Filelist";
+			if (!(p instanceof FileList)) {
+				throw new InternalError();
+			} else {
+				return ((FileList)p).getFileList();
+			}
+		} catch (NotFound e) {
+			throw new ProtocolError();
+		} catch (EmptyFile e) {
+			throw new ProtocolError();
+		}
+	}
+}

src/clientP2P/ClientManagementUDP.java

@@ -54,7 +54,7 @@ public class ClientManagementUDP implements Runnable {
 			socket = new DatagramSocket();
 			socket.connect(InetAddress.getByName(host), UDPPort);
 		} catch (SocketException e) {
-			System.err.println("Error: No socket available.");
+			System.err.println("Error: No UDP socket available.");
 			System.exit(-1);
 		} catch (UnknownHostException e) {
 			System.err.println("Error: Unknown host.");

src/clientP2P/ClientP2P.java

@@ -1,6 +1,6 @@
 package clientP2P;
 import clientP2P.ClientManagementUDP;
-//import clientP2P.ClientManagementTCP;
+import clientP2P.ClientManagementTCP;
 import tools.Directories;
 import java.util.Scanner;
 
@@ -26,6 +26,7 @@ public class ClientP2P {
 			case "UDP":
 			case "udp":
 			case "2" :
+				System.out.println("Starting with UDP");
 				ClientManagementUDP cmudp = new ClientManagementUDP(c.directories.getDataHomeDirectory(), c.host, c.port);
 				t = new Thread(cmudp);
 				break;
@@ -33,10 +34,10 @@ public class ClientP2P {
 			case "tcp":
 			case "1":
 			default:
-				//ClientManagementTCP cmtcp = new ClientManagementTCP(c.directories.getDataHomeDirectory(), c.host, c.port);
-				//t = new Thread(cmtcp);
-				//break;
-				throw new java.lang.UnsupportedOperationException();
+				System.out.println("Starting with TCP");
+				ClientManagementTCP cmtcp = new ClientManagementTCP(c.directories.getDataHomeDirectory(), c.host, c.port);
+				t = new Thread(cmtcp);
+				break;
 		  }
 
 		t.setName("client P2P-JAVA-PROJECT");

src/protocolP2P/ProtocolP2PPacket.java

@@ -64,7 +64,7 @@ public abstract class ProtocolP2PPacket {
 	public abstract ProtocolP2PPacket receiveResponse() throws EmptyFile, NotFound, EmptyDirectory, InternalRemoteError, VersionRemoteError, ProtocolRemoteError, TransmissionError, ProtocolError, VersionError, InternalError, SizeError, IOException;
 
 	/** Receive a request, subclasses must overwrite this constructor.
-	 * @param serverSocket	socket used to get the request
+	 * @param socket	socket used to get the request
 	 * @throws	TransmissionError
 	 * @throws	ProtocolError
 	 * @throws	VersionError
@@ -72,7 +72,7 @@ public abstract class ProtocolP2PPacket {
 	 * @throws	SizeError
 	 * @throws	IOException
 	 */
-	protected ProtocolP2PPacket(Object serverSocket) throws TransmissionError, ProtocolError, VersionError, InternalError, SizeError, IOException {}
+	protected ProtocolP2PPacket(Object socket) throws TransmissionError, ProtocolError, VersionError, InternalError, SizeError, IOException {}
 
 	/** Construct a packet from byte[], subclasses must overwrite this constructor.
 	 * @param packet	Packet received

src/protocolP2P/ProtocolP2PPacketTCP.java

@@ -0,0 +1,287 @@
+package protocolP2P;
+import exception.InternalError;
+import exception.ProtocolError;
+import exception.SizeError;
+import exception.TransmissionError;
+import exception.VersionError;
+import remoteException.EmptyDirectory;
+import remoteException.InternalRemoteError;
+import remoteException.NotFound;
+import remoteException.ProtocolRemoteError;
+import remoteException.VersionRemoteError;
+import remoteException.EmptyFile;
+import tools.BytesArrayTools;
+import protocolP2P.Payload;
+import protocolP2P.RequestResponseCode;
+import protocolP2P.LoadRequest;
+import protocolP2P.FileList;
+import protocolP2P.FilePart;
+import java.util.ArrayList;
+import java.lang.Byte;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.net.Socket;
+
+/** Representation of packet.
+ * @author	Louis Royer
+ * @author	Flavien Haas
+ * @author	JS Auge
+ * @version	1.0
+ */
+public class ProtocolP2PPacketTCP extends ProtocolP2PPacket {
+	
+	private Socket responseSocket; // socket used to recept request and send response
+	private Socket requestSocket; // socket used to send request and to reception response
+	
+	/** Constructor with payload parameter (typically used when sending packet).
+	 * @param payload	the payload associated with the packet to send
+	 */
+	public ProtocolP2PPacketTCP(Payload payload) {
+		super(payload);
+	}
+
+
+	/** Send a Packet. Socket must be set and connected.
+	 * @param socket	Socket used to send Packet.
+	 * @throws	InternalError
+	 * @throws	IOException
+	 */
+	protected void send(Socket socket) throws InternalError, IOException {
+		assert socket != null : "Trying to send a Packet but no socket defined";
+		assert socket.isConnected() : "Trying to send a Packet but socket not connected";
+		if (socket == null || (!socket.isConnected())) {
+			throw new InternalError();
+		}
+		// generate Packet
+		byte[] packet = toPacket();
+		// send it
+		OutputStream outputStream = socket.getOutputStream();
+		outputStream.write(packet);
+		outputStream.flush();
+	}
+
+	/** Send a Request throught socket. Socket must be connected (typically used from client).
+	 * @param socket	Socket. Must be connected.
+	 * @throws	InternalError
+	 * @throws	IOException
+	 */
+	public void sendRequest(Object socket) throws InternalError, IOException {
+		assert socket instanceof Socket: "Wrong socket type";
+		if (socket instanceof Socket) {
+			requestSocket = (Socket)socket;
+			send(requestSocket);
+		} else {
+			throw new InternalError();
+		}
+	}
+
+	/** Receive Request (typically used from server).
+	 * @param socket	socket used to receive request
+	 * @throws	TransmissionError
+	 * @throws	ProtocolError
+	 * @throws	VersionError
+	 * @throws	InternalError
+	 * @throws	SizeError
+	 * @throws	IOException
+	 * @return	ProtocolP2PPacket received.
+	 */
+	public ProtocolP2PPacketTCP(Object socket) throws TransmissionError, ProtocolError, VersionError, InternalError, SizeError, IOException {
+		super(socket);
+		assert socket instanceof Socket : "Wrong socket type";
+		if (!(socket instanceof Socket)) {
+			throw new InternalError();
+		}
+		Socket ss = (Socket)socket;
+		byte[] packet = new byte[1024];
+		ss.getInputStream().read(packet);
+		// contruction
+		boolean protocolError = false;
+		try {
+			constructPacket(packet, ss);
+			Payload payload = getPayload();
+			switch (payload.getRequestResponseCode()) {
+				case PROTOCOL_ERROR :
+					// we do not want to create an infinite loop of protocolError message exchange.
+					protocolError = true;
+					break;
+				case VERSION_ERROR :
+				case INTERNAL_ERROR :
+				case EMPTY_DIRECTORY :
+				case NOT_FOUND :
+				case EMPTY_FILE:
+				case LOAD_RESPONSE:
+				case LIST_RESPONSE:
+					// we were expecting a request, but we are receiving a response
+					throw new ProtocolError();
+				default :
+					break;
+			}
+		} catch (TransmissionError e) {
+			(new ProtocolP2PPacketTCP(new Payload(RequestResponseCode.INTERNAL_ERROR))).send(ss);
+			throw e;
+		} catch (ProtocolError e) {
+			(new ProtocolP2PPacketTCP(new Payload(RequestResponseCode.PROTOCOL_ERROR))).send(ss);
+			throw e;
+		} catch (VersionError e) {
+			(new ProtocolP2PPacketTCP(new Payload(RequestResponseCode.VERSION_ERROR))).send(ss);
+			throw e;
+		} catch (InternalError e) {
+			(new ProtocolP2PPacketTCP(new Payload(RequestResponseCode.INTERNAL_ERROR))).send(ss);
+			throw e;
+		} catch (SizeError e) {
+			(new ProtocolP2PPacketTCP(new Payload(RequestResponseCode.INTERNAL_ERROR))).send(ss);
+			throw e;
+		}
+		if (protocolError) {
+			throw new ProtocolError();
+		}
+	}
+
+	/** Send a Response to a Request (typically used from server).
+	 * @param response	Packet to send as a response.
+	 * @throws	InternalError
+	 * @throws	IOException
+	 */
+	public void sendResponse(ProtocolP2PPacket response) throws InternalError, IOException {
+		assert response instanceof ProtocolP2PPacketTCP: "Wrong Packet type";
+		if (response instanceof ProtocolP2PPacketTCP) {
+			ProtocolP2PPacketTCP r = (ProtocolP2PPacketTCP) response;
+			assert responseSocket != null : "Cannot send response to a packet not received";
+			if (responseSocket == null) {
+				throw new InternalError();
+			}
+			r.send(responseSocket);
+		} else {
+			throw new InternalError();
+		}
+	}
+
+	/** Receive response (typically used by client).
+	 * @return	ProtocolP2PPacket received
+	 * @throws	EmptyFile
+	 * @throws	NotFound
+	 * @throws	EmptyDirectory
+	 * @throws	InternalRemoteError
+	 * @throws	VersionRemoteError
+	 * @throws	ProtocolRemoteError
+	 * @throws	TransmissionError
+	 * @throws	ProtocolError
+	 * @throws	VersionError
+	 * @throws	InternalError
+	 * @throws	SizeError
+	 * @throws	IOException
+	 */
+	public ProtocolP2PPacket receiveResponse() throws EmptyFile, NotFound, EmptyDirectory, InternalRemoteError, VersionRemoteError, ProtocolRemoteError, TransmissionError, ProtocolError, VersionError, InternalError, SizeError, IOException {
+		assert requestSocket != null : "Cannot receive response because request packet not sent.";
+		if (requestSocket == null) {
+			throw new InternalError();
+		}
+		// reception
+		byte[] packet = new byte[8192];
+		requestSocket.getInputStream().read(packet);
+		// contruction
+		try {
+			ProtocolP2PPacketTCP p = new ProtocolP2PPacketTCP(packet);
+			Payload payload = p.getPayload();
+			switch (payload.getRequestResponseCode()) {
+				case PROTOCOL_ERROR :
+					throw new ProtocolRemoteError();
+				case VERSION_ERROR :
+					throw new VersionRemoteError();
+				case INTERNAL_ERROR :
+					throw new InternalRemoteError();
+				case EMPTY_DIRECTORY :
+					throw new EmptyDirectory();
+				case NOT_FOUND :
+					throw new NotFound();
+				case EMPTY_FILE:
+					throw new EmptyFile();
+				default :
+					return (ProtocolP2PPacket)p;
+			}
+		} catch (TransmissionError e) {
+			(new ProtocolP2PPacketTCP(new Payload(RequestResponseCode.INTERNAL_ERROR))).send(requestSocket);
+			throw e;
+		} catch (ProtocolError e) {
+			(new ProtocolP2PPacketTCP(new Payload(RequestResponseCode.PROTOCOL_ERROR))).send(requestSocket);
+			throw e;
+		} catch (VersionError e) {
+			(new ProtocolP2PPacketTCP(new Payload(RequestResponseCode.VERSION_ERROR))).send(requestSocket);
+			throw e;
+		} catch (InternalError e) {
+			(new ProtocolP2PPacketTCP(new Payload(RequestResponseCode.INTERNAL_ERROR))).send(requestSocket);
+			throw e;
+		} catch (SizeError e) {
+			(new ProtocolP2PPacketTCP(new Payload(RequestResponseCode.INTERNAL_ERROR))).send(requestSocket);
+			throw e;
+		}
+	}
+
+	/** Private constructor with packet as byte[] parameter (typically used when receiving Packet response).
+	 * @param packet	the full Packet received
+	 * @throws	TransmissionError
+	 * @throws	ProtocolError
+	 * @throws	VersionError
+	 * @throws	InternalError
+	 * @throws	SizeError
+	 */
+	private ProtocolP2PPacketTCP(byte[] packet) throws TransmissionError, ProtocolError, VersionError, InternalError, SizeError {
+		super(packet);
+		constructPacket(packet);
+	}
+
+	/** Private constructor helper with packet as byte[] parameter (typically used when receiving Packet response/request).
+	 * @param packet	the full Packet received
+	 * @throws	TransmissionError
+	 * @throws	ProtocolError
+	 * @throws	VersionError
+	 * @throws	InternalError
+	 * @throws	SizeError
+	 */
+	private void constructPacket(byte[] packet) throws TransmissionError, ProtocolError, VersionError, InternalError, SizeError {
+		// unwrap version
+		version = packet[VERSION_POSITION];
+		checkProtocolVersion(); // this can throw VersionError
+		RequestResponseCode r = RequestResponseCode.fromCode(packet[RequestResponseCode.RRCODE_POSITION]); // this can throw ProtocolError
+		switch (r) {
+			case LIST_RESPONSE:
+				payload = (Payload) new FileList(packet);
+				break;
+			case LOAD_RESPONSE:
+				payload = (Payload) new FilePart(packet);
+				break;
+			case LOAD_REQUEST:
+				payload = (Payload) new LoadRequest(packet);
+				break;
+			default:
+				payload = new Payload(packet); // this can throw TransmissionError
+				break;
+		}
+	}
+
+	/** Private constructor helper with packet as byte[] parameter and (typically used when receiving Packet request).
+	 * @param packet	the full Packet received
+	 * @param responseSocket	socket address used to reception this request (use this one to respond)
+	 * @throws	TransmissionError
+	 * @throws	ProtocolError
+	 * @throws	VersionError
+	 * @throws	InternalError
+	 * @throws	SizeError
+	 */
+	private void constructPacket(byte[] packet, Socket responseSocket) throws TransmissionError, ProtocolError, VersionError, InternalError, SizeError {
+		constructPacket(packet);
+		this.responseSocket = responseSocket;
+	}
+
+	/** Returns a byte[] containing full packet (typically used when sending packet).
+	 * This packet is complete and ready to be send.
+	 * @return the full packet to send
+	 * @throws	InternalError
+	 */
+	protected byte[] toPacket() throws InternalError {
+		byte[] packet = payload.toPacket();
+		packet[VERSION_POSITION] = version;
+		return packet;
+	}
+
+}

src/protocolP2P/ProtocolP2PPacketUDP.java

@@ -90,7 +90,7 @@ public class ProtocolP2PPacketUDP extends ProtocolP2PPacket {
 	}
 
 	/** Receive Request (typically used from server).
-	 * @param serverSocket	socket used to receive request
+	 * @param socket	socket used to receive request
 	 * @throws	TransmissionError
 	 * @throws	ProtocolError
 	 * @throws	VersionError
@@ -99,13 +99,13 @@ public class ProtocolP2PPacketUDP extends ProtocolP2PPacket {
 	 * @throws	IOException
 	 * @return	ProtocolP2PPacket received.
 	 */
-	public ProtocolP2PPacketUDP(Object serverSocket) throws TransmissionError, ProtocolError, VersionError, InternalError, SizeError, IOException {
-		super(serverSocket);
-		assert serverSocket instanceof DatagramSocket : "Wrong socket type";
-		if (!(serverSocket instanceof DatagramSocket)) {
+	public ProtocolP2PPacketUDP(Object socket) throws TransmissionError, ProtocolError, VersionError, InternalError, SizeError, IOException {
+		super(socket);
+		assert socket instanceof DatagramSocket : "Wrong socket type";
+		if (!(socket instanceof DatagramSocket)) {
 			throw new InternalError();
 		}
-		DatagramSocket ss = (DatagramSocket)serverSocket;
+		DatagramSocket ss = (DatagramSocket)socket;
 		byte[] packet = new byte[1024];
 		DatagramPacket reception = new DatagramPacket(packet, packet.length);
 		ss.receive(reception);

src/serverP2P/ServerManagementTCP.java

@@ -0,0 +1,185 @@
+package serverP2P;
+import java.util.Vector;
+import java.io.File;
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.SocketException;
+import java.nio.file.Paths;
+import java.nio.file.Files;
+import java.net.ServerSocket;
+import java.net.Socket;
+import protocolP2P.ProtocolP2PPacketTCP;
+import protocolP2P.ProtocolP2PPacket;
+import protocolP2P.RequestResponseCode;
+import protocolP2P.Payload;
+import protocolP2P.LoadRequest;
+import protocolP2P.FileList;
+import protocolP2P.FilePart;
+import exception.InternalError;
+import exception.ProtocolError;
+import exception.SizeError;
+import exception.TransmissionError;
+import exception.VersionError;
+import remoteException.EmptyDirectory;
+import remoteException.InternalRemoteError;
+import remoteException.NotFound;
+import remoteException.ProtocolRemoteError;
+import remoteException.VersionRemoteError;
+import remoteException.EmptyFile;
+import java.util.Arrays;
+
+
+/** Implementation of P2P-JAVA-PROJECT VERSION 1.0 protocol for TCP.
+ * @author	Louis Royer
+ * @author	Flavien Haas
+ * @author	JS Auge
+ * @version	1.0
+ */
+public class ServerManagementTCP implements Runnable {
+
+	private String[] fileList;
+	private String baseDirectory;
+	private int TCPPort;
+	private ServerSocket socket;
+
+	/** Constructor for TCP implementation, with baseDirectory and TCPPort parameters.
+	 * @param baseDirectory	the root directory where files are stored
+	 * @param TCPPort	the server will listen on this port
+	 */
+	public ServerManagementTCP(String baseDirectory, int TCPPort) {
+		this.baseDirectory = baseDirectory;
+		this.TCPPort = TCPPort;
+		initFileList();
+		try {
+			socket = new ServerSocket(TCPPort);
+		} catch (SocketException e) {
+			System.err.println("Error: cannot listen on port " + TCPPort + " (TCP)");
+			System.exit(-1);
+		} catch (IOException e) {
+			System.err.println("Error: cannot openning TCP socket");
+			System.exit(-2); 
+		}
+	}
+
+	/** Implementation of runnable. This methods allows to run the server.
+	 */
+	public void run() {
+		// TODO: handling multiple clients
+		try {
+			Socket s = socket.accept();
+			System.err.println("Accepting new connection");
+			while(true) {
+				try {
+					ProtocolP2PPacketTCP pd = new ProtocolP2PPacketTCP((Object)s);
+					Payload p = pd.getPayload();
+					switch (p.getRequestResponseCode()) {
+						case LOAD_REQUEST:
+							System.out.println("Received LOAD_REQUEST");
+							assert p instanceof LoadRequest : "payload must be an instance of LoadRequest";
+							if (!(p instanceof LoadRequest)) {
+								sendInternalError(pd);
+							} else {
+								String filename = ((LoadRequest)p).getFilename();
+								long offset = ((LoadRequest)p).getOffset();
+								long maxSizePartialContent = ((LoadRequest)p).getMaxSizePartialContent();
+								try {
+									byte[] fullLoad = Files.readAllBytes(Paths.get(baseDirectory + filename));
+									long sizeToSend = 0;
+									if (fullLoad.length - offset < maxSizePartialContent) {
+										System.out.println("Sending last partialContent");
+										sizeToSend = fullLoad.length - offset;
+									} else {
+										sizeToSend = maxSizePartialContent;
+									}
+									System.out.println("maxSizePartialContent: " + maxSizePartialContent);
+									System.out.println("Sending " + filename + " from " + offset + " to " + (offset + sizeToSend));
+									byte[] load = Arrays.copyOfRange(fullLoad, (int)offset, (int)(offset + sizeToSend));
+									if (Arrays.binarySearch(fileList, filename) >= 0) {
+										try {
+											if (load.length == 0) {
+												pd.sendResponse((ProtocolP2PPacket)new ProtocolP2PPacketTCP(new Payload(RequestResponseCode.EMPTY_FILE)));
+											} else {
+												pd.sendResponse((ProtocolP2PPacket)new ProtocolP2PPacketTCP((Payload)(new FilePart(filename, fullLoad.length, offset, load))));
+											}
+										} catch (Exception e2) {
+											System.err.println(e2);
+										}
+									} else {
+										System.err.println("File requested not found: `" + filename + "` " + Arrays.binarySearch(fileList, filename));
+										System.err.println("File list:");
+										for (String f: fileList) {
+											System.err.println("- " + f);
+										}
+										
+										throw new IOException(); // to send a NOT_FOUND in the catch block
+									}
+								} catch (IOException e) {
+									try {
+										pd.sendResponse((ProtocolP2PPacket)new ProtocolP2PPacketTCP(new Payload(RequestResponseCode.NOT_FOUND)));
+									} catch (Exception e2) {
+										System.err.println(e2);
+									}
+								}
+							}
+							break;
+						case LIST_REQUEST:
+							System.out.println("Received LIST_REQUEST");
+							try {
+								if (fileList.length == 0) {
+									System.err.println("Sending EMPTY_DIRECTORY");
+									pd.sendResponse((ProtocolP2PPacket)new ProtocolP2PPacketTCP(new Payload(RequestResponseCode.EMPTY_DIRECTORY)));
+								} else {
+									System.out.println("Sending LIST_RESPONSE");
+									pd.sendResponse((ProtocolP2PPacket)new ProtocolP2PPacketTCP((Payload)(new FileList(fileList))));
+								}
+							} catch (Exception e2) {
+								System.err.println(e2);
+							}
+							break;
+						default:
+							sendInternalError(pd);
+					}
+				} catch (IOException e) {
+				} catch (TransmissionError e) {
+				} catch (ProtocolError e) {
+				} catch (VersionError e) {
+				} catch (InternalError e) {
+				} catch (SizeError e) {
+				}
+			}
+		} catch (IOException e) {
+		}
+	}
+
+	/** Initialize local list of all files allowed to be shared.
+	 */
+	private void initFileList() {
+		File folder = new File(baseDirectory);
+		Vector<String> v = new Vector<String>();
+		File[] files = folder.listFiles();
+		/* Add non-recursively files's names to fileList */
+		for (File f : files) {
+			if (f.isFile()) {
+				v.add(f.getName());
+			}
+		}
+		fileList = new String[v.size()];
+		v.toArray(fileList);
+		Arrays.sort(fileList);
+	}
+
+
+	
+	/** Send an internal error message.
+	 * @param pd	ProtocolP2PPacketTCP to respond
+	 */
+	private void sendInternalError(ProtocolP2PPacketTCP pd) {
+		try {
+			pd.sendResponse((ProtocolP2PPacket)new ProtocolP2PPacketTCP(new Payload(RequestResponseCode.INTERNAL_ERROR)));
+		} catch (Exception e) {
+			System.err.println(e);
+		}
+	}
+
+}
+

src/serverP2P/ServerManagementUDP.java

@@ -52,7 +52,7 @@ public class ServerManagementUDP implements Runnable {
 		try {
 			socket = new DatagramSocket(UDPPort);
 		} catch (SocketException e) {
-			System.err.println("Error: cannot listen on port " + UDPPort);
+			System.err.println("Error: cannot listen on port " + UDPPort + " (UDP)");
 			System.exit(-1);
 		}
 	}

src/serverP2P/ServerP2P.java

@@ -1,5 +1,6 @@
 package serverP2P;
 import serverP2P.ServerManagementUDP;
+import serverP2P.ServerManagementTCP;
 import tools.Directories;
 
 public class ServerP2P {
@@ -14,10 +15,14 @@ public class ServerP2P {
 	}
 	public static void main(String [] args) {
 		ServerP2P s = new ServerP2P();
-		ServerManagementUDP sm = new ServerManagementUDP(s.directories.getDataHomeDirectory(), s.port);
-		Thread t = new Thread(sm);
-		t.setName("server P2P-JAVA-PROJECT");
-		t.start();
+		ServerManagementUDP smudp = new ServerManagementUDP(s.directories.getDataHomeDirectory(), s.port);
+		ServerManagementTCP smtcp = new ServerManagementTCP(s.directories.getDataHomeDirectory(), s.port);
+		Thread tudp = new Thread(smudp);
+		tudp.setName("server UDP P2P-JAVA-PROJECT");
+		tudp.start();
+		Thread ttcp = new Thread(smtcp);
+		ttcp.setName("server TCP P2P-JAVA-PROJECT");
+		ttcp.start();
 	}
 
 }