diff options
Diffstat (limited to 'Lib/robotparser.py')
| -rw-r--r-- | Lib/robotparser.py | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/Lib/robotparser.py b/Lib/robotparser.py index 6f85afa..3f4396b 100644 --- a/Lib/robotparser.py +++ b/Lib/robotparser.py @@ -23,15 +23,14 @@ class RobotFileParser: def set_url(self, url): self.url = url -## import urlmisc -## self.url = urlmisc.canonical_url(url) def read(self): import urllib self.parse(urllib.urlopen(self.url).readlines()) def parse(self, lines): - import regsub, string, regex + """parse the input lines from a robot.txt file""" + import string, re active = [] for line in lines: if self.debug: print '>', line, @@ -43,7 +42,7 @@ class RobotFileParser: line = string.strip(line[:string.find(line, '#')]) if not line: continue - line = regsub.split(line, ' *: *') + line = re.split(' *: *', line) if len(line) == 2: line[0] = string.lower(line[0]) if line[0] == 'user-agent': @@ -56,7 +55,7 @@ class RobotFileParser: if line[1]: if self.debug: print '>> disallow:', line[1] for agent in active: - self.rules[agent].append(regex.compile(line[1])) + self.rules[agent].append(re.compile(line[1])) else: pass for agent in active: @@ -68,30 +67,31 @@ class RobotFileParser: self.modified() # returns true if agent is allowed to fetch url - def can_fetch(self, agent, url): + def can_fetch(self, useragent, url): + """using the parsed robots.txt decide if useragent can fetch url""" import urlparse - ag = agent + ag = useragent if not self.rules.has_key(ag): ag = '*' if not self.rules.has_key(ag): - if self.debug: print '>> allowing', url, 'fetch by', agent + if self.debug: print '>> allowing', url, 'fetch by', useragent return 1 path = urlparse.urlparse(url)[2] for rule in self.rules[ag]: - if rule.match(path) != -1: - if self.debug: print '>> disallowing', url, 'fetch by', agent + if rule.match(path) is not None: + if self.debug: print '>> disallowing', url, 'fetch by', useragent return 0 - if self.debug: print '>> allowing', url, 'fetch by', agent + if self.debug: print '>> allowing', url, 'fetch by', useragent return 1 -def test(): +def _test(): rp = RobotFileParser() rp.debug = 1 - rp.set_url('http://www.automatrix.com/robots.txt') + rp.set_url('http://www.musi-cal.com/robots.txt') rp.read() print rp.rules - print rp.can_fetch('*', 'http://www.calendar.com/concerts/') + print rp.can_fetch('*', 'http://www.musi-cal.com.com/') print rp.can_fetch('Musi-Cal-Robot', - 'http://dolphin:80/cgi-bin/music-search?performer=Rolling+Stones') + 'http://www.musi-cal.com/cgi-bin/event-search?city=San+Francisco') - print rp.can_fetch('Lycos', 'http://www/~skip/volkswagen/') - print rp.can_fetch('Lycos', 'http://www/~skip/volkswagen/vanagon-list-001') +if __name__ == "__main__": + _test() |