Regex to extract a particular value from within a delimited string

Hi everyone, I'm currently working on a way to parse out a web server log file and I've managed to put together the regular expression that pulls each field that is delimited by space.

I have however realized it would be much more helpful if I could pull out a single value with a 'key-value pair' in the cookie field.

Here's the current expression I'm using:

(?<ip>\S+)\s+(?<xrfc931>\S+)\s+(?<username>\S+)\s+\[(?<date>\S+)\:+(?<time>\S+\:+\S+\:+\S+)\s+(?<xTimezone>[^\]]*)]\s+"(?<xhttpmethod>\S+)\s+(?:(?<uristem>\S+?)\?(?<uristemquery>\S+)|(?<uristem>\S+))\s+(?<xhttpprotocol>\S+)"\s+(?<viewstatus>\S+)\s+(?<xbytes>\S+)\s+\"(?<referer>[^\"]*)\"\s+\"(?<useragent>[^\"]*)\"(?:\s+\"(?<cookie>[^\"]*)\"|\s)

To parse out a line within a log file such as:

205.188.116.5 - - [25/May/2006:03:00:05 -0700] "GET /main.do HTTP/1.1" 302 - "-" "Mozilla/4.0 (compatible; MSIE 6.0; AOL 9.0; Windows NT 5.0; .NET CLR 1.1.4322; Hotbar 4.6.1)" "Beacon=hsareg.59808951.jdw0725590001.hsa0.1148551020.RemoveMe; __utma=175376801.1874071127.1148452243.1148452243.1148551027.2; __utmz=175376801.1148452243.1.1.utmccn=(direct)|utmcsr=(direct)|utmcmd=(none); ctc=on%5F3; cpa_ver3=249%2C898%2C2826%2C71%2C-1%2C1148551098%3B247%2C892%2C2817%2C130431%2C-1%2C1148551188%3B242%2C897%2C2834%2C130541%2C-1%2C1148452462%3B246%2C890%2C2816%2C130431%2C-1%2C1148551123; bht=24-13-0-0-0%3A45-18-0-0-0; id=78773248; fci=891-0-2-1148452463-2%3A892-0-2-1148551188-2; fcc=; __utmb=175376801; __utmc=175376801; JSESSIONID=DFEA5BD2A779EE45CC58145BD8D20D9F"

Instead of parsing out the entire cookie value, I'm hoping to define cookie as only the value for JSESSIONID. So in the above example cookie would be only '
DFEA5BD2A779EE45CC58145BD8D20D9F'

Is this possible using a regular expression?

Thanks!Start Free Trial