SimpleServer.java

package com.java_server;

import com.sun.net.httpserver.HttpServer;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpExchange;
import com.java_server.model.User;
import java.io.IOException;
import java.io.OutputStream;
import java.io.InputStream;
import java.net.InetSocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.Map;

public class SimpleServer {

    public static void main(String[] args) throws IOException {
        HttpServer server = HttpServer.create(new InetSocketAddress(8080), 0);
        System.out.println("Server started on port 8080...");
        server.createContext("/login", new LoginHandler());
        server.setExecutor(null);
        server.start();
    }

    static class LoginHandler implements HttpHandler {
        @Override
        public void handle(HttpExchange exchange) throws IOException {
            if ("POST".equalsIgnoreCase(exchange.getRequestMethod())) {
                String body = new String(exchange.getRequestBody().readAllBytes(), StandardCharsets.UTF_8);
                Map<String, String> parameters = parseFormData(body);
                User user = new User();
                user.setEmail(parameters.get("email"));
                user.setPassword(parameters.get("password"));
                String response = "Received User Data: \nEmail: " + user.getEmail() + "\nPassword: " + user.getPassword();
                exchange.sendResponseHeaders(200, response.getBytes().length);
                OutputStream os = exchange.getResponseBody();
                os.write(response.getBytes());
                os.close();
            } else {
                String response = "Method Not Allowed";
                exchange.sendResponseHeaders(405, response.getBytes().length);
                OutputStream os = exchange.getResponseBody();
                os.write(response.getBytes());
                os.close();
            }
        }

        private Map<String, String> parseFormData(String body) {
            Map<String, String> parameters = new HashMap<>();
            String[] pairs = body.split("&");
            for (String pair : pairs) {
                String[] keyValue = pair.split("=");
                if (keyValue.length == 2) {
                    parameters.put(keyValue[0], keyValue[1]);
                }
            }
            return parameters;
        }
    }
}