捕获 http 错误 [英] Catching http errors
本文介绍了捕获 http 错误的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
例如,如何在 python 和 urllib(2) 中捕获页面的 404 和 403 错误?
how can I catch the 404 and 403 errors for pages in python and urllib(2), for example?
有没有大类包装器的快速方法?
Are there any fast ways without big class-wrappers?
添加信息(堆栈跟踪):
Added info (stack trace):
Traceback (most recent call last):
File "test.py", line 3, in <module>
page = urllib2.urlopen("http://localhost:4444")
File "/usr/lib/python2.6/urllib2.py", line 126, in urlopen
return _opener.open(url, data, timeout)
File "/usr/lib/python2.6/urllib2.py", line 391, in open
response = self._open(req, data)
File "/usr/lib/python2.6/urllib2.py", line 409, in _open
'_open', req)
File "/usr/lib/python2.6/urllib2.py", line 369, in _call_chain
result = func(*args)
File "/usr/lib/python2.6/urllib2.py", line 1161, in http_open
return self.do_open(httplib.HTTPConnection, req)
File "/usr/lib/python2.6/urllib2.py", line 1136, in do_open
raise URLError(err)
urllib2.URLError: <urlopen error [Errno 111] Connection refused>
推荐答案
import urllib2
try:
page = urllib2.urlopen("some url")
except urllib2.HTTPError, err:
if err.code == 404:
print "Page not found!"
elif err.code == 403:
print "Access denied!"
else:
print "Something happened! Error code", err.code
except urllib2.URLError, err:
print "Some other error happened:", err.reason
在您的情况下,错误已经在建立 HTTP 连接之前发生 - 因此您需要添加另一个捕获 URLError
的错误处理程序.但这与 404 或 403 错误无关.
In your case, the error happens already before the HTTP connection could be built - therefore you need to add another error handler that catches URLError
. But this has nothing to do with 404 or 403 errors.
这篇关于捕获 http 错误的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
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