Re for Apache log file format
Andreas Perstinger
andipersti at gmail.com
Tue Oct 8 06:23:20 EDT 2013
On 08.10.2013 08:33, Sam Giraffe wrote:
> #this is a single line
> string = '192.168.122.3 - - [29/Sep/2013:03:52:33 -0700] "GET / HTTP/1.0"
> 302 276 "-" "check_http/v1.4.16 (nagios-plugins 1.4.16)"'
>
> #trying to break up the pattern match for easy to read code
> pattern = re.compile(r'(?P<ip>\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\s+'
> r'(?P<ident>\-)\s+'
> r'(?P<username>\-)\s+'
> r'(?P<TZ>\[(.*?)\])\s+'
> r'(?P<url>\"(.*?)\")\s+'
> r'(?P<httpcode>\d{3})\s+'
> r'(?P<size>\d+)\s+'
> r'(?P<referrer>\"\")\s+'
> r'(?P<agent>\((.*?)\))')
[SNIP]
> The python interpreter is skipping to the 'math = re.search' and then the
> 'if' statement right after it looks at the <ip>, instead of moving onto
> <ident> and so on.
I'm not sure if I understand your problem, but your regex pattern only
matches up to the size. When you look for the referrer, the pattern
expects two quotes but in your string you have "-" (quote, dash, quote).
Thus there is no match (i.e. "match" is None) and the if-statement will
print "not found".
Bye, Andreas
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