Unity3d 5.x的极简Python服务器

TL；DR：我在Unity3D客户端应用程序和服务器上的UDP python侦听器之间通信时遇到问题。

我正试图通过Unity 5.x NetworkTransport LLAPI和Python 3.x套接字模块从Unity3D游戏客户端简单地获得低级别的调用和响应

目标：将发送到服务器的消息弹回到客户端。

问题：

• 当我运行Unity3d客户端时，套接字打开，服务器每秒打印一个新的recvfrom数据，但unity从未接收到反弹的数据
• 大约10秒后，客户端会收到一个Timeout错误和一个DisconnectEvent

状态：

客户：Unity 5.4

服务器：亚马逊AWS，端口8888打开

服务器端python应用程序：

import socket
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.bind(('', 8888))
print ('Listening on port 8888')
while True:
    data, addr = s.recvfrom(4096)
    if data:
        for i in range(0, len(data)):
            print (data[i])
        print (data, addr)
        s.sendto(data, addr)

客户端Unity网络类：

using UnityEngine;
using UnityEngine.Networking;
using System.Collections;
public class NetworkExecutor : MonoBehaviour
{
    const string addr = IP_ADDR;
    const int port = PORT;
    bool connected = false;
    // Doing lots of error checks but no need to save them. Let's def this and hold onto it.
    byte e;
    void Start ()
    {
        // Some testing involves waiting for responses or repetitious send/receive calls.
        // We do this in coroutines for both efficiency and human sanity.
        StartCoroutine(TestNetwork());
    }
    IEnumerator TestNetwork()
    {
        // Define network configurations.
        ConnectionConfig config = new ConnectionConfig();
        int reliableChannel = config.AddChannel(QosType.Reliable);
        int maxConnections = 10;
        HostTopology hostTopo = new HostTopology(config, maxConnections);
        // Initialize and connect network with config.
        NetworkTransport.Init();
        int hostId = NetworkTransport.AddHost(hostTopo);
        int connectionId = NetworkTransport.Connect(hostId, addr, port, 0, out e);
        Debug.Log("<b>Connect.</b> Host ID: " + hostId + " Connection ID: " + connectionId);
        ErrStr(e);
        // Send test message.
        byte[] msg = System.Text.Encoding.UTF8.GetBytes("Send string");
        NetworkTransport.Send(hostId, connectionId, reliableChannel, msg, 4096, out e);
        Debug.Log("<b>Send.</b> Msg: " + msg);
        ErrStr(e);
        // Receive test message.
        int recHostId;
        int recConnectionId;
        int recChannelId;
        int recSize;
        msg = System.Text.Encoding.UTF8.GetBytes("Unmodified byte buffer.");
        NetworkEventType eventType = NetworkTransport.Receive(out recHostId, out recConnectionId, out recChannelId, msg, 4096, out recSize, out e);
        Debug.Log("<b>Receive.</b> Type: " + eventType + " Msg: " + System.Text.Encoding.UTF8.GetString(msg));
        Debug.Log("(hID:" + recHostId + " cID:" + recConnectionId + " chId:" + recChannelId + " " + recSize + ")");
        ErrStr(e);
        NetworkTransport.Disconnect(hostId, connectionId, out e);
        ErrStr(e);
        yield break;
    }
    string ErrStr(byte e)
    {
        switch ((NetworkError)e)
        {
            case NetworkError.Ok:
                return "Ok";
            case NetworkError.WrongHost:
                return "<color=red>Wrong Host</color>";
            case NetworkError.WrongConnection:
                return "<color=red>Wrong Connection</color>";
            case NetworkError.WrongChannel:
                return "<color=red>Wrong Channel</color>";
            case NetworkError.NoResources:
                return "<color=red>No Resources</color>";
            case NetworkError.BadMessage:
                return "<color=red>Bad Message</color>";
            case NetworkError.Timeout:
                return "<color=red>Timeout</color>";
            case NetworkError.MessageToLong:
                return "<color=red>Message Too Long</color>";
            case NetworkError.WrongOperation:
                return "<color=red>Wrong Operation</color>";
            case NetworkError.VersionMismatch:
                return "<color=red>Version Mismatch</color>";
            case NetworkError.CRCMismatch:
                return "<color=red>CRC Mismatch</color>";
            case NetworkError.DNSFailure:
                return "<color=red>DNS Failure</color>";
            default:
                return "<color=red><b>Big problem, we don't know this error code.</b></color>";
        }
    }
}

**原谅这一团糟。与我天生的冲动相反，这里忽略了许多编码惯例和良好实践。这是因为该应用程序仅用于理解Unity和Python最基本的底层网络使用。当一个基元信号量可以建立时，它将被丢弃并正确重写。