Swoole如何实现TCP服务？TCP客户端如何连接？

Swoole\Server

Swoole\Server

connect

receive

close

<?php
$server = new Swoole\Server("127.0.0.1", 9501);

$server->on('connect', function (Swoole\Server $server, int $fd) {
    echo "connection open: {$fd}\n";
});

$server->on('receive', function (Swoole\Server $server, int $fd, int $reactor_id, string $data) {
    echo "received data: {$data}\n";
    $server->send($fd, 'Swoole: '.$data);
});

$server->on('close', function (Swoole\Server $server, int $fd) {
    echo "connection close: {$fd}\n";
});

$server->start();
?>

connect

receive

close

open_length_check

package_length_type

package_length_offset

package_body_offset

connect

receive

close

workerStart

task

workerError

socket

import socket

HOST = '127.0.0.1'
PORT = 9501

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.connect((HOST, PORT))
    s.sendall(b'Hello, Swoole!')
    data = s.recv(1024)

print('Received', repr(data))

java.net.Socket

import java.net.*;
import java.io.*;

public class TCPClient {
    public static void main(String[] args) throws IOException {

        String hostName = "127.0.0.1";
        int portNumber = 9501;

        try (
            Socket socket = new Socket(hostName, portNumber);
            PrintWriter out =
                new PrintWriter(socket.getOutputStream(), true);
            BufferedReader in =
                new BufferedReader(
                    new InputStreamReader(socket.getInputStream()));
        ) {
            out.println("Hello, Swoole!");
            String response = in.readLine();
            System.out.println("Response: " + response);

        } catch (UnknownHostException e) {
            System.err.println("Don't know about host " + hostName);
            System.exit(1);
        } catch (IOException e) {
            System.err.println("Couldn't get I/O for the connection to " +
                hostName);
            System.exit(1);
        }
    }
}