Kafedra: tbtavadt "Tarmoqni dasturlash asoslari" fani bo’yicha

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TDA Laboratoriya 1-8.

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Next /title> /head> <body> <h2>Bu faylda hech qanday ma'lumot yo'q /h1> <a href="index.html">Asosiy sahifaga o'tish /a> /body> /html> O’ZBEKISTON RESPUBLIKASI AXBOROT TEXNOLOGIYALARI VA KOMUNIKATSIYALARINI RIVOJLANTIRISH VAZIRLIGI <h2> </h2> Kafedra: TBTAvaDT “Tarmoqni dasturlash asoslari” fani bo’yicha 6-Laboratoriya ishi Mavzu: Fayllarni ko’chiruvchi tarmoq dasturni yaratish. . 004/L1– guruh talabasi Bajardi: Sobirov Ibrohim Tekshirdi: Akmuradov B Ishdan maqsad: Java dasturlash tili java.net.* va java.io.* paketlari klasslaridan foydalanib fayllarni ko’chirish tarmoq dasturini yaratish. <h2>Dastur kodi:</h2> FTPServer klassi: package lab6; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.File; import java.io.IOException; import java.net.ServerSocket; import java.net.Socket; import java.nio.file.Files; import java.util.Arrays; import java.util.Optional; public class FTPServer { public static void main(String[] args) throws IOException { ServerSocket server = new ServerSocket(8080); System.out.println("Server started"); File folder = new File("/home/ik/Projects/tda_lab_IK/folder_server"); while (true) { Socket soc = server.accept(); DataOutputStream dos = new DataOutputStream(soc.getOutputStream()); DataInputStream dis = new DataInputStream(soc.getInputStream()); System.out.println("New session"); int act; String emptyMsg = "Folder is empty!"; printMenu(dos); do { File[] files = folder.listFiles(); if (files = null) { dos.writeUTF("Internal server error"); break; } dos.writeUTF("Enter menu number in range [0-3]"); act = dis.readInt(); String res = ""; switch (act) { case 0: { res = "Session ended"; System.out.println(res); } break; case 1: { res = Arrays.stream(files) .map(File getName) .reduce((s1, s2) > s1 + "\n" + s2) .orElse(emptyMsg); System.out.println("Files list:\n" + res); } break; case 2: { if (files.length = 0) { res = emptyMsg; } else { Optional<File> opt = Optional.empty(); dos.writeUTF("Enter existing filename"); do { String filename = dis.readUTF(); if (filename.equals("!")) { res = "Cancelled"; dos.writeInt(1); break; } opt = Arrays.stream(files) .filter(file > file.getName().equals(filename)) .findFirst(); dos.writeInt(opt.isEmpty() ? 0 : 2); } while (opt.isEmpty()); if (opt.isPresent()) { byte[] bytes = Files.readAllBytes(opt.get().toPath()); dos.writeInt(bytes.length); dos.write(bytes); res = "Downloaded file: " + opt.get().getName(); } } System.out.println("Download > " + res); } break; case 3: { dos.writeUTF("Select your file"); String filename = dis.readUTF(); String originalName = filename; while (!filename.equals("!") & new File(folder, filename).exists() ) { dos.writeInt(0); dos.writeUTF(filename + " exists. Dou you:\n" + "c: cancel\n" + "r: rename\n" + "s: select other file"); String s = dis.readUTF(); if (s.equalsIgnoreCase("c")) { res = "Cancelled"; break; } filename = dis.readUTF(); if (s.equalsIgnoreCase("s")) { originalName = filename; } } if (filename.equals("!")) { res = "Cancelled"; dos.writeInt(1); } else if (!new File(folder, filename).exists()) { dos.writeInt(2); int len = dis.readInt(); byte[] data = new byte[len]; dis.read(data); Files.write(folder.toPath().resolve(filename), data); res = originalName + " uploaded as " + filename; } } } if (filename.equals("!")) { res = "Cancelled"; dos.writeInt(1); } else if (!new File(folder, filename).exists()) { dos.writeInt(2); int len = dis.readInt(); byte[] data = new byte[len]; dis.read(data); Files.write(folder.toPath().resolve(filename), data); res = originalName + " uploaded as " + filename; } System.out.println("Upload > " + res); } break; default: { printMenu(dos); continue; } } dos.writeUTF(res); System.out.println(" "); } while (act = 0); } } static void printMenu(DataOutputStream dos) throws IOException { dos.writeUTF("Menu:\n" + "0 > End session\n" + "1 > List all files\n" + "2 > Download file\n" + "3 > Upload file\n" + "Other > Menu" ); } } FTPClient klassi: package lab6; import java.io.DataInputStream; import java.io.DataOutputStream; import java.net.Socket; import java.nio.file.Files; import java.nio.file.Path; import java.util.List; import java.util.Scanner; import java.util.stream.Collectors; public class FTPClient { public static void main(String[] args) throws Exception { Scanner in = new Scanner(System.in); Socket soc = new Socket("localhost", 8080); DataOutputStream dos = new DataOutputStream(soc.getOutputStream()); DataInputStream dis = new DataInputStream(soc.getInputStream()); int act; Path folder = Path.of("/home/ik/Projects/tda_lab_IK/folder_client"); System.out.println("Client started"); System.out.println(dis.readUTF()); do { System.out.println(dis.readUTF()); act = in.nextInt(); dos.writeInt(act); switch (act) { case 2: { System.out.println(dis.readUTF()); String filename = in.next(); dos.writeUTF(filename); int code; while ((code = dis.readInt()) = 0) { System.out.println("File not found"); filename = in.next(); dos.writeUTF(filename); } if (code = 2) { int len = dis.readInt(); byte[] data = new byte[len]; dis.read(data); Files.write(folder.resolve(filename), data); } } break; case 3: { System.out.println(dis.readUTF()); List list = Files.list(folder).collect(Collectors.toList()); if (list.isEmpty()) { System.out.println("Empty client folder"); dos.writeUTF("!"); } else { for (int i = 0; i < list.size(); i +) { System.out.println(i + "." + list.get(i).getFileName()); } int k; do { System.out.print("Enter available file number: "); k = in.nextInt(); } while (k = list.size()); dos.writeUTF(list.get(k).getFileName().toString()); int code; while ((code = dis.readInt()) = 0) { System.out.println(dis.readUTF()); String s = in.next(); dos.writeUTF(s); if (s.equalsIgnoreCase("c")) { break; } if (s.equalsIgnoreCase("s")) { for (int i = 0; i < list.size(); i +) { System.out.println(i + "." + list.get(i).getFileName()); } do { System.out.print("Enter available file number: "); k = in.nextInt(); } while (k = list.size()); dos.writeUTF(list.get(k).getFileName().toString()); } else { dos.writeUTF(in.next()); } } if (code = 2) { byte[] bytes = Files.readAllBytes(list.get(k)); dos.writeInt(bytes.length); dos.write(bytes); } } } break; } System.out.println(dis.readUTF()); System.out.println(" "); } while (act = 0); } } </file></a></body>

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