Python开发Telegram Bot发送PDF/G-drive链接报错求助

我用Python开发Telegram Bot，想让Bot发送PDF文件或Google Drive链接，但运行时报错，报错信息如下：

No error handlers are registered, logging exception.
Traceback (most recent call last):
  File "/home/murgod/.local/lib/python3.9/site-packages/telegram/ext/dispatcher.py", line 557, in process_update
    handler.handle_update(update, self, check, context)
  File "/home/murgod/.local/lib/python3.9/site-packages/telegram/ext/handler.py", line 199, in handle_update
    return self.callback(update, context)
  File "/home/murgod/KubeBot/KubeBot-4/GKEbot.py", line 217, in send_resume
    bot.send_document(
  File "/home/murgod/.local/lib/python3.9/site-packages/telegram/bot.py", line 133, in decorator
    result = func(*args, **kwargs)
  File "/home/murgod/.local/lib/python3.9/site-packages/telegram/bot.py", line 976, in send_document
    return self._message(  # type: ignore[return-value]
  File "/home/murgod/.local/lib/python3.9/site-packages/telegram/bot.py", line 339, in _message
    result = self._post(endpoint, data, timeout=timeout, api_kwargs=api_kwargs)
  File "/home/murgod/.local/lib/python3.9/site-packages/telegram/bot.py", line 298, in _post
    return self.request.post(
  File "/home/murgod/.local/lib/python3.9/site-packages/telegram/utils/request.py", line 361, in post
    result = self._request_wrapper(
  File "/home/murgod/.local/lib/python3.9/site-packages/telegram/utils/request.py", line 279, in _request_wrapper
    raise BadRequest(message)
telegram.error.BadRequest: Wrong file identifier/http url specified

对应的实现代码：

def xyz(update, context):
   resume_url = ''  
   bot.send_document(
       chat_id=update.effective_chat.id,
       document=xyz_url,
       filename='xyz.pdf',          
   )

xyz_handler = CommandHandler('xyz', xyz)
dispatcher.add_handler(xyz_handler)

• 修正变量错误：代码里定义的是resume_url，调用时却用了未定义的xyz_url，且resume_url是空字符串，这直接导致URL无效。先统一变量名，填入有效的文件URL或本地文件路径。
• 处理Google Drive链接：普通G-drive分享链接无法被Telegram Bot识别，需要转换为可直接下载的格式：
  1. 提取链接中的FILE_ID，将原链接/file/d/[FILE_ID]/view格式，替换为/uc?id=[FILE_ID]&export=download
  2. 确保目标文件已设置为公开可下载权限，否则Bot无法访问
• 发送本地PDF文件：如果是本地文件，直接传入文件路径即可，比如document='/home/xxx/xyz.pdf'，无需使用URL
• 验证URL有效性：先在浏览器打开目标URL，确认能直接下载PDF后，再放到代码中测试
• 添加错误捕获：在函数中加入异常捕获，方便定位问题：

  from telegram.error import BadRequest
  
  def xyz(update, context):
      try:
          # 替换为有效的URL或本地路径
          valid_doc = "https://xxx.com/xyz.pdf"
          context.bot.send_document(
              chat_id=update.effective_chat.id,
              document=valid_doc,
              filename='xyz.pdf'
          )
      except BadRequest as e:
          update.message.reply_text(f"发送失败：{str(e)}")
  

• 使用context.bot调用方法：推荐用context.bot替代全局bot变量，避免全局变量引发的潜在问题

内容的提问来源于stack exchange，提问作者Nani