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import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.net.ServerSocket;

import java.net.Socket;

import java.nio.charset.StandardCharsets;

import java.time.LocalDateTime;

public class SimpleHttpServer {

private final int port;

public SimpleHttpServer(int port) {

this.port = port;

}

public void start() {

try(final ServerSocket server = new ServerSocket(port)) {

System.out.println("Listening for connection on port " + port);

while (true) {

try(final Socket client = server.accept()) {

// 1. Read HTTP request from the client socket

InputStreamReader isr = new InputStreamReader(client.getInputStream());

BufferedReader reader = new BufferedReader(isr);

String line = reader.readLine();

while (!line.isEmpty()) {

System.out.println(line);

line = reader.readLine();

}

// 2. Prepare an HTTP response

LocalDateTime date = LocalDateTime.now();

String response = "HTTP/1.1 200 OK \r\n\r\n" + date;

System.out.println(response);

// 3. Send HTTP response to the client

client.getOutputStream().write(response.getBytes(StandardCharsets.UTF_8));

client.getOutputStream().flush();

} catch (Exception e) {

e.printStackTrace();

}

}

} catch (Exception e) {

e.fillInStackTrace();

}

}

}