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Catch robots.txt errors.

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This commit is contained in:
Bastian Kleineidam 2013-02-21 19:48:04 +01:00
parent b453c442c2
commit d0c3492cc7
1 changed files with 12 additions and 6 deletions
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18
dosagelib/util.py
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@ -183,6 +183,7 @@ def normaliseURL(url):
"""Removes any leading empty segments to avoid breaking urllib2; also replaces
HTML entities and character references.
"""
# XXX does not work for python3
if isinstance(url, unicode):
url = url.encode(UrlEncoding, 'ignore')
# XXX: brutal hack
@ -221,13 +222,18 @@ def check_robotstxt(url, session):
def get_robotstxt_parser(url, session=None):
"""Get a RobotFileParser for the given robots.txt URL."""
rp = robotparser.RobotFileParser()
req = urlopen(url, session, max_content_bytes=MaxContentBytes, raise_for_status=False)
if req.status_code in (401, 403):
rp.disallow_all = True
elif req.status_code >= 400:
try:
req = urlopen(url, session, max_content_bytes=MaxContentBytes, raise_for_status=False)
except Exception:
# connect or timeout errors are treated as an absent robotst.txt
rp.allow_all = True
elif req.status_code == 200:
rp.parse(req.content.splitlines())
else:
if req.status_code in (401, 403):
rp.disallow_all = True
elif req.status_code >= 400:
rp.allow_all = True
elif req.status_code == 200:
rp.parse(req.content.splitlines())
return rp