Python URL重定向 - 處理302，移動到404

Question

我知道我們可以使用requests和urllib2包來處理重定向。我不想使用requests，因爲它不是預建套件。請幫我用urllib2來處理一個需要302然後移動到404的URL。我不關心404，我想跟蹤它是301還是302.

我提到了這個doc但它仍然拋出404

這裏是我的代碼

import urllib2 
class My_HTTPRedirectHandler(urllib2.HTTPRedirectHandler): 
    def http_error_302(self, req, fp, code, msg, headers): 
     return urllib2.HTTPRedirectHandler.http_error_302(self, req, fp, code, msg, headers) 

my_opener = urllib2.build_opener(My_HTTPRedirectHandler) 
urllib2.install_opener(my_opener) 
response =urllib2.urlopen("MY URL") 
print response.read() 

這裏是我的迴應

Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
    File "/usr/lib/python2.7/urllib2.py", line 126, in urlopen 
    return _opener.open(url, data, timeout) 
    File "/usr/lib/python2.7/urllib2.py", line 406, in open 
    response = meth(req, response) 
    File "/usr/lib/python2.7/urllib2.py", line 519, in http_response 
    'http', request, response, code, msg, hdrs) 
    File "/usr/lib/python2.7/urllib2.py", line 438, in error 
    result = self._call_chain(*args) 
    File "/usr/lib/python2.7/urllib2.py", line 378, in _call_chain 
    result = func(*args) 
    File "<stdin>", line 3, in http_error_302 
    File "/usr/lib/python2.7/urllib2.py", line 625, in http_error_302 
    return self.parent.open(new, timeout=req.timeout) 
    File "/usr/lib/python2.7/urllib2.py", line 406, in open 
    response = meth(req, response) 
    File "/usr/lib/python2.7/urllib2.py", line 519, in http_response 
    'http', request, response, code, msg, hdrs) 
    File "/usr/lib/python2.7/urllib2.py", line 444, in error 
    return self._call_chain(*args) 
    File "/usr/lib/python2.7/urllib2.py", line 378, in _call_chain 
    result = func(*args) 
    File "/usr/lib/python2.7/urllib2.py", line 527, in http_error_default 
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp) 
urllib2.HTTPError: HTTP Error 404: Not Found  

Answer 1

這是更好地使用httplib和HTTP/1.1 HEAD方法。這樣沒有收到任何答覆機構。

What’s the best way to get an HTTP response code from a URL?