[logs] regexless parsing, again?

Christina Noren cfrln at cfrln.com
Fri Sep 14 15:40:04 PDT 2007


why do you care which vendor created the web access log if it's the  
same format?

and why on earth would you build a system that accepts syslog input  
without recording and being able to use the originating host's IP in  
other logic?

On Sep 14, 2007, at 2:41 PM, Kinsley, Michael wrote:

> Consider the following:
> 	- You are receiving Web access logs from 2 different boxes (they
> stream to us over syslog)
> 	- Each server is from a different vendor.
> 		*These happen to be vendors that both said: "Hey, we
> will follow the W3C standard for our access logs".
>
> Can you devise a regular expression that can discriminate between  
> vendor
> x logs and vendor y?
>
> Answer: Not without hard coding an IP Address or host name... and then
> we would need to store this "Meta-Information" somewhere else... and
> then we need a procedural language to go map and sort these results.

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