ChatClient.cs

using System.Collections;
using System.Collections.Generic;
using System;
using UnityEngine;
using UnityEngine.UI;
using System.Net.Sockets;
using System.Text;
using System.Net;
using System.Threading.Tasks;
using System.Threading;

public class ChatClient : MonoBehaviour {

	// ゲームオブジェクト
	public InputField input_field;
	public GameObject content;
	public GameObject chat_log;

	public static string a;

	//おまじない
	private SynchronizationContext context;

	// サーバー情報
	private string server_ip_address = "192.168.0.25";
	private int port = 25252;

	// クライアントの送信窓口
	NetworkStream network_stream;

	// 送信内容
	private string send_text;

	// 受信用
	private TcpListener listener;
	private float request_span = 10f;
	private byte[] buffer = new byte[4096];


	// Start is called before the first frame update
	void Start() {

		context = SynchronizationContext.Current;

		//Componentを扱えるようにする
		input_field = input_field.GetComponent<InputField>();

		// 監視
		Task.Run(Listener);
	}

	private void Update() {
		if (a != "") {
			GameObject instance = Instantiate(chat_log);
			instance.transform.parent = content.transform;
			instance.transform.localScale = new Vector3(1, 1, 1);
			instance.GetComponent<Text>().text = a;
			a = "";
		}
	}

	public void InputText() {
		//テキストにinputFieldの内容を反映
		send_text = input_field.text;
	}

	// ボタンクリック時
	public void NetworkRequest() {
		// 接続要求
		network_stream = new TcpClient(server_ip_address, port).GetStream();

		// 送信の内容をセット
		if (send_text.Length == 0) return;
		byte[] send_string = Encoding.UTF8.GetBytes(send_text);

		// データを送信
		network_stream.Write(send_string, 0, send_string.Length);

		network_stream.Close();
	}


	public void Listener() {

		SynchronizationContext.SetSynchronizationContext(context);

		listener = new TcpListener(IPAddress.Any, port);

		Debug.Log("監視開始1");

		try {
			listener.Start();
		}
		catch (Exception e) {
			Debug.Log(e.Message);
			Debug.Log(e.TargetSite);
			Debug.Log(e.StackTrace);
		}

		Debug.Log("監視開始2");
		while (true) {
			//接続要求があったら受け入れる
			TcpClient client = listener.AcceptTcpClient();

			Debug.Log("きた！");

			network_stream = client.GetStream();

			// データを受信
			network_stream.Read(buffer, 0, buffer.Length);
			string message = Encoding.UTF8.GetString(buffer);
			Debug.Log(message);
			a = message;

			// バッファリセット
			buffer = new byte[4096];

			network_stream.Close();
		}
	}

}