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package client;

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.Socket;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

public class Client {

private static final int PORT = 8484;
private static final String HOST = "localhost";
private static final int delim = 1024 * 1024;//1 mb

public static void main(String[] arr) {

System.out.println("Вы успешно соеденены с сервером.");

try (Socket socket = new Socket(HOST, PORT);
InputStream inputStream = socket.getInputStream();
OutputStream outputStream = socket.getOutputStream();
DataInputStream dataInputStream = new DataInputStream(inputStream);
DataOutputStream dataOutputStream = new DataOutputStream(outputStream);) {
//выбор файла
String line = dataInputStream.readUTF();
Set<String> names = new HashSet();
names.addAll(Arrays.asList(line.split("n")));
System.out.println("Выберите файл:n" + line);
BufferedReader consoleReader = new BufferedReader(new InputStreamReader(System.in));
String fileName;
System.out.println("Введите название необходимого файла:");
while (true) {
fileName = consoleReader.readLine();
if (names.contains(fileName)) {
break;
} else {
System.out.println("Файл с таким названием не существует. Попробуйте ещё раз");
}
}
//путь
Path path;
System.out.println("Введите место для сохранения файла");
for (;;) {
String pathForSave = consoleReader.readLine();
path = Paths.get(pathForSave);
if (!Files.exists(path)) {
System.out.println("Вы ввели неверный путь. Попробуйте еще раз");
} else {
break;
}
}
dataOutputStream.writeUTF(fileName);
//загрузка файла
int length = dataInputStream.readInt();
System.out.println("Загрузка файла...");
byte[] data = new byte[length];
if (length > 0) {
for (int i = 0; i < length; i += delim) {
int len = length - i < delim ? length - i : delim;
dataInputStream.readFully(data, i, len);
dataOutputStream.writeUTF(Status.SUCCESS.name());
}
}
//сохранение файла
File file = new File(path.toString(), fileName);
try (FileOutputStream fileOuputStream = new FileOutputStream(file)) {
fileOuputStream.write(data);
}
System.out.println("Файл успешно загружен.");
dataOutputStream.writeUTF(Status.SUCCESS.name());
} catch (IOException e) {
System.out.println("При загрузке файла произошла ошибка.");
}
}

private enum Status {

SUCCESS,
ERROR
}
}
     
 
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