python requests ,打开网页，如果header host错误会导致TooManyRedirects: Exceeded 30 redirects. 还有404错误

python requests ,打开网页，如果header host错误会导致TooManyRedirects: Exceeded 30 redirects. 还有404错误

二级域名写成顶级域名

例如 my.youkuaiyun.com 写成 www.youkuaiyun.com

Traceback (most recent call last):
  File "K:/download/feng/eng_room.py", line 72, in <module>
    response = requests.get(url, params=params, headers=headers, cookies=cookies)
  File "K:\ProgramData\Anaconda3\envs\py37\lib\site-packages\requests\api.py", line 73, in get
    return request("get", url, params=params, **kwargs)
  File "K:\ProgramData\Anaconda3\envs\py37\lib\site-packages\requests\api.py", line 59, in request
    return session.request(method=method, url=url, **kwargs)
  File "K:\ProgramData\Anaconda3\envs\py37\lib\site-packages\requests\sessions.py", line 589, in request
    resp = self.send(prep, **send_kwargs)
  File "K:\ProgramData\Anaconda3\envs\py37\lib\site-packages\requests\sessions.py", line 725, in send
    history = [resp for resp in gen]
  File "K:\ProgramData\Anaconda3\envs\py37\lib\site-packages\requests\sessions.py", line 725, in <listcomp>
    history = [resp for resp in gen]
  File "K:\ProgramData\Anaconda3\envs\py37\lib\site-packages\requests\sessions.py", line 192, in resolve_redirects
    f"Exceeded {self.max_redirects} redirects.", response=resp
requests.exceptions.TooManyRedirects: Exceeded 30 redirects.

域名错误

host:www.youkuaiyun.com写成了 www.cdn.net

404错误