Hi, I'm trying to write a patternmatching regexp, with two optional parenthesis, but I can't figure out how to have an 'optional' match. I.e. I want a match, regardless if the last two fields are available or not. But if thy are available, I want to use them... I'm confident there is a simple solution - I just haven't found it yet...
In practice: The logfiles are from several Apache webservers. Some files contain two additonal fields containing Referer and Browser type, which are last on each line (example below, may be wrapped). 10.0.0.1 - - [30/Aug/2001:14:58:16 +0200] "GET /banner_1.gif HTTP/1.1" 200 12796 "http://example.com/"; "Mozilla/5.0 (Windows; U; Win98; en-US; m18) Gecko/20010131 Netscape6/6.01" My Patternmatching code look s as follows: if ( m/^(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}) # IP Address \x20(.+?) # User \x20(.+?) # unused \x20(\[.+\]) # Date \x20\"(.*?\n*?.*?) # Request (HTTP\/.*?|)\" # Match regardless of HTTP Version. \x20(\d+?) # Statuscodes \x20([\-\d]+?) # Size \x20(\".*?\") # Optional Referer \x20(\".*?\") # Optinal Browser type /ox ) However, it's the last two fields ($9 and $10) that I want to be optional. If they don't exist in the current line being matched, I still want the rest of the fields to be populated ($1 - $8). I.e. an 'optional' match... On alternativ is to have two different pattern matching statements, but that would complicate matters. There are more 'optionals' than just these examples... Any help would be greatly apprecieted. And yes, I have read the docs, but simply not understood them. TIA, ~Mike Mike Blomgren CCNOX Security Management & Technology AB Box 5227 102 45 STOCKHOLM www.ccnox.com _____________________________________________________________ The information included in this e-mail is intended only for the person or entity to which it is addressed. Any use of this information by persons or entities other than the intended recipient is prohibited. If you receive this transmission in error, please delete this email and destroy any copies of it. Any opinions expressed in this email are those of the individual and not necessarily those of the company CCNOX. _______________________________________________ ActivePerl mailing list [EMAIL PROTECTED] To unsubscribe: http://listserv.ActiveState.com/mailman/mysubs
