基于Telethon开发Telegram Bot遇TimeoutError连接失败求助

我用Telethon开发了一个简单的Telegram Bot，代码如下：

from telethon import TelegramClient, events
from config import *
client = TelegramClient('bot_session',api_id= api_id, api_hash=api_hash)

@client.on(events.NewMessage(pattern= r'/start'))
async def start(event):
    await client.send_message(entity=event.chat_id,message='Hi')

client.start()
client.run_until_disconnected()

运行后出现连接超时错误，尝试过VPS、VPN及代理仍无法解决，错误信息如下：

Attempt 1 at connecting failed: TimeoutError: 
Attempt 2 at connecting failed: TimeoutError: 
Attempt 3 at connecting failed: TimeoutError: 
Attempt 4 at connecting failed: TimeoutError: 
Attempt 5 at connecting failed: TimeoutError: 
Attempt 6 at connecting failed: TimeoutError: 
Traceback (most recent call last):
  File "e:\MyPython\TelegramBot\TelegramBot-telethon.py", line 11, in <module>
    client.start()
  File "C:\Users\User\AppData\Local\Programs\Python\Python311\Lib\site-packages\telethon\client\auth.py", line 128, in start
    else self.loop.run_until_complete(coro)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\User\AppData\Local\Programs\Python\Python311\Lib\asyncio\base_events.py", line 653, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "C:\Users\User\AppData\Local\Programs\Python\Python311\Lib\site-packages\telethon\client\auth.py", line 135, in _start
    await self.connect()
  File "C:\Users\User\AppData\Local\Programs\Python\Python311\Lib\site-packages\telethon\client\telegrambaseclient.py", line 547, in connect
    if not await self._sender.connect(self._connection(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\User\AppData\Local\Programs\Python\Python311\Lib\site-packages\telethon\network\mtprotosender.py", line 134, in connect
    await self._connect()
  File "C:\Users\User\AppData\Local\Programs\Python\Python311\Lib\site-packages\telethon\network\mtprotosender.py", line 260, in _connect
    raise ConnectionError('Connection to Telegram failed {} time(s)'.format(self._retries))
ConnectionError: Connection to Telegram failed 5 time(s)

• 明确配置代理参数：如果使用代理，必须在Telethon客户端初始化时指定完整代理信息，比如socks5代理示例：

  from telethon import TelegramClient, events
  from config import *
  
  # 替换为你的代理地址、端口、用户名和密码（如有）
  proxy = ('socks5', 'proxy_host', proxy_port, True, 'proxy_user', 'proxy_pass')
  client = TelegramClient('bot_session', api_id=api_id, api_hash=api_hash, proxy=proxy)
  

  若用VPN，需确认系统全局代理已接管Python进程的网络请求，可检查HTTP_PROXY和HTTPS_PROXY环境变量是否正确设置。

• 切换Telegram备用服务器：默认服务器可能被屏蔽，尝试使用官方公开的备用IP，通过connection_details指定：

  from telethon import TelegramClient, events
  from telethon.network.connection.tcpabridged import ConnectionTcpAbridged
  from config import *
  
  # 示例备用IP，可替换为其他官方公开节点
  client = TelegramClient(
      'bot_session',
      api_id=api_id,
      api_hash=api_hash,
      connection=ConnectionTcpAbridged,
      connection_details=('149.154.167.50', 443)
  )
  

• 验证API信息有效性：确认从Telegram开发者平台获取的api_id和api_hash正确，且对应账号未被限制，可尝试用同一API信息登录官方Telegram客户端测试连接。

• 延长连接超时时间：初始化客户端时增加超时参数，给连接更多等待时间：

  client = TelegramClient(
      'bot_session',
      api_id=api_id,
      api_hash=api_hash,
      timeout=30  # 设置为30秒
  )
  

• 检查VPS网络限制：若使用VPS，通过命令测试Telegram服务器端口是否可通：

  telnet 149.154.167.50 443
  

  连接失败则联系VPS提供商解除端口限制，或更换其他地区节点。

• 更新Telethon版本：旧版本可能存在兼容问题，执行命令升级：

  pip install --upgrade telethon
  

内容的提问来源于stack exchange，提问作者Mohsen Rahmdeli