1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | import re #This regular expression is the heart of the code. #Python uses Perl regex, so it should be readily portable #The r'' string form is just a convenience so you don't have to escape backslashes COMBINED_LOGLINE_PAT = re.compile( r'(?P<origin>\d+\.\d+\.\d+\.\d+) ' + r'(?P<identd>-|\w*) (?P<auth>-|\w*) ' + r'\[(?P<date>[^\[\]:]+) ![]() + r'"(?P<method>\w+) (?P<path>[\S]+) (?P<protocol>[^"]+)" (?P<status>\d+) (?P<bytes>-|\d+)' + r'( (?P<referrer>"[^"]*")( (?P<client>"[^"]*")( (?P<cookie>"[^"]*"))?)?)?\s*\Z' ) logline = raw_input(" ![]() match_info = COMBINED_LOGLINE_PAT.match(logline) print #Add a new line #Print all named groups matched in the regular expression for key, value in match_info.groupdict().items(): print key, ":", value |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | import re import sys #This regular expression is the heart of the code. #Python uses Perl regex, so it should be readily portable #The r'' string form is just a convenience so you don't have to escape backslashes COMBINED_LOGLINE_PAT = re.compile( r'(?P<origin>\d+\.\d+\.\d+\.\d+) ' + r'(?P<identd>-|\w*) (?P<auth>-|\w*) ' + r'\[(?P<date>[^\[\]:]+) ![]() + r'"(?P<method>\w+) (?P<path>[\S]+) (?P<protocol>[^"]+)" (?P<status>\d+) (?P<bytes>-|\d+)' + r'( (?P<referrer>"[^"]*")( (?P<client>"[^"]*")( (?P<cookie>"[^"]*"))?)?)?\s*\Z' ) #Patterns in the client field for sniffing out bots BOT_TRACES = [ (re.compile(r".*http://help\.yahoo\.com/help/us/ysearch/slurp.*"), "Yahoo robot"), (re.compile(r".*\+http://www\.google\.com/bot\.html.*"), "Google robot"), (re.compile(r".*\+http://about\.ask\.com/en/docs/about/webmasters.shtml.*"), "Ask Jeeves/Teoma robot"), (re.compile(r".*\+http://search\.msn\.com\/msnbot\.htm.*"), "MSN robot"), (re.compile(r".*http://www\.entireweb\.com/about/search_tech/speedy_spider/.*"), "Speedy Spider"), (re.compile(r".*\+http://www\.baidu\.com/search/spider_jp\.html.*"), "Baidu spider"), (re.compile(r".*\+http://www\.gigablast\.com/spider\.html.*"), "Gigabot robot"), ] for line in sys.stdin: match_info = COMBINED_LOGLINE_PAT.match(line) if not match_info: sys.stderr.write("Unable to parse log line\n") continue isbot = False for pat, botname in BOT_TRACES: if pat.match(match_info.group('client')): isbot = True break if not isbot: sys.stdout.write(line) |
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