diff --git a/doc/classdiagram.xml b/doc/classdiagram.xml index e6dfb8c..9bc3e48 100644 --- a/doc/classdiagram.xml +++ b/doc/classdiagram.xml @@ -1 +1 @@ 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\ No newline at end of file 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\ No newline at end of file diff --git a/src/client/Client.java b/src/client/Client.java index 3005e2a..3d60b9d 100644 --- a/src/client/Client.java +++ b/src/client/Client.java @@ -1,10 +1,39 @@ package client; public class Client { + private String host; + private int port; + private String directory; public Client() { - + host = "localhost"; + port = 40000; + String d; + /* Follow XDG Base Directory Specification + * https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html + */ + if (System.getProperty("os.name").equals("Linux")) { + d = System.getenv().get("XDG_DATA_HOME"); + if (d == null || f.equals("")) { + d = System.getenv().get("HOME"); + if (d != null && (!f.equals(""))) { + d += "/.local/share"; + } else { + d += "." + } + } + } else { + d = "."; + } + d += "P2P_JAVA_PROJECT_CLIENT/"; + // create directory if not already exists + new File(d).mkdirs(); + } } public static void main(String [] args) { Client c = new Client("client"); + ClientManagementUDP cm = new ClientManagementUDP(c.directory, c.host, c.port); + Thread t = new Thread(cm); + t.setName("client P2P-JAVA-PROJECT"); + t.start(); } } diff --git a/src/client/ClientManagement.java b/src/client/ClientManagement.java deleted file mode 100644 index 967d31a..0000000 --- a/src/client/ClientManagement.java +++ /dev/null @@ -1,17 +0,0 @@ -package client; -import exception.NotFound; - -public class ClientManagment { - private String baseDirectory; - public ClientManagment(String baseDirectory) { - this.baseDirectory = baseDirectory; - } - - public void download(String filename) throws NotFound { - } - - public String listDirectory() { - - } - -} diff --git a/src/client/ClientManagementUDP.java b/src/client/ClientManagementUDP.java new file mode 100644 index 0000000..6dc1a4f --- /dev/null +++ b/src/client/ClientManagementUDP.java @@ -0,0 +1,140 @@ +package client; +import exception.NotFound; +import exception.ProtocolError; +import exception.InternalError; +import exception.TransmissionError; +import java.utils.Scanner; +import java.net.InetAddress; +import java.net.DatagramPacket; +import java.net.DatagramSocket; +import java.io.File; +import java.io.IOException; + +/** Implementation of P2P-JAVA-PROJECT VERSION 1.0 protocol for UDP. + * @author Louis Royer + * @author Flavien Haas + * @author JS Auge + * @version 1.0 + */ +public class ClientManagmentUDP implements Runnable { + private String baseDirectory; + private int UDPPort; + private String host; + private final String protocolID = "P2P-JAVA-PROJECT VERSION 1.0"; + + + /** Constructor for UDP implementation, with baseDirectory and UDPPort parameters. + * @param baseDirectory the root directory where files are stored + * @param UDPPort the server will listen on this port + */ + public ClientManagmentUDP(String baseDirectory, String host, int UDPPort) { + this.baseDirectory = baseDirectory; + this.host = host; + this.UDPPort = UDPPort; + } + + /** Implementation of Runnable + */ + public void run() { + System.out.println("Files present on the server:"); + try { + String msg = sendMsg(sendFileList()); + System.out.println(listDirectory(msg)); + System.out.println("Name of the file to download:"); + Scanner scanner = new Scanner(System.in); + f = scanner.nextLine(); + msg = sendMsg(sendDownloadRequest(f)); + download(msg, f); + } catch (ProtocolError e) { + System.out.println("Protocol error"); + } catch (NotFound e) { + System.out.println("File not found"); + } catch (InternalError e) { + System.out.println("Server internal error"); + } catch (IOException e) { + System.out.println("Cannot write to file"); + } + } + + /** Prepare request to download file + * @param filename name of the file to be downloaded + * @return request to be send + */ + private String sendDownloadRequest(String filename) { + return protocolID + "\nDOWNLOAD\n" + filename + "\n"; + } + + /** Download file. + * @param response Servers's response + * @throws NotFound + * @throws ProtocolError + * @throws InternalError + */ + private void download(String response, String filename) throws NotFound, ProtocolError, InternalError, IOException { + try { + String r[] = r.split('\n', 3); + checkProtocolID(r[0]); + String r2[] = r[1].split(' '); + if (r2[0] != "LOAD") { + throw ProtocolError; + } + int size = Integer.parseInt(r2[1]); + if (r[2].length() != size) { + throws TransmissionError; + } + FileWriter fileWriter = new FileWriter(baseDirectory + f); + fileWriter.write(r[2]); + fileWriter.close(); + + } catch (java.lang.ArrayIndexOutOfBoundsException e) { + throw ProtocolError; + } catch (ParseException e) { + throw ProtocolError; + } + } + + /** Prepare request to list files on server + * @return request to be send + */ + private String sendListDirectoryRequest() { + return protocolID + "\nLIST\n"; + } + + /** Parse list of directory response from server + * @param response server's response + * @return list of files, separated by CRLF + * @throws ProtocolError + */ + private String listDirectory(String response) throws ProtocolError { + try { + String r[] = r.split('\n'); + checkProtocolID(r[0]); + return r.split(protocolID + "\nLOAD \n")[1]; + } catch (java.lang.ArrayIndexOutOfBoundsException e) { + throw ProtocolError; + } + } + + /** Check client's protocol identifier matches message's protocol identifier. + * Throws a ProtocolError if mismatched. + * @param msgProtocolID part of the request containing protocol identifier + * @throws ProtocolError + */ + private void checkProtocolID(String msgProtocolID) throws ProtocolError { + if (protocolID != msgProtocolID) { + throw ProtocolError; + } + } + + /** Send message to server + * @param msg message to be send + * @return server's response + */ + private String sendMsg(String msg) { + InetAddress dst = InetAddress.getByName(host); + byte [] bytesString = msg.getBytes(); + DatagramPacket emission = new DatagramPacket(bytesString, bytesString.length, dst, UDPPort); + socket.send(emission); + socket.receive(reception); + return new String(reception.getData(), 0, reception.getLength()); +} diff --git a/src/exception/TransmissionError.java b/src/exception/TransmissionError.java new file mode 100644 index 0000000..67a01c7 --- /dev/null +++ b/src/exception/TransmissionError.java @@ -0,0 +1,2 @@ +package exception; +public class TransmissionError extends Exceptions {}