Nagios Support Forum

Posted: **Fri Dec 28, 2012 12:59 am**

In Website Wizard, option for Web page Regular Expression Match. What would be use of that and let me know any example for expression of the contend of webpage.
Thanks!!

Posted: **Fri Dec 28, 2012 10:34 am**

The idea with the regex match or inverse regex match is to search the content of the page you requested for a particular string, often to verify the status of something that could only be checked by looking at that page. A simple example would be:

Code: Select all

./check_http -H www.nagios.com -s yahoo     - Checks for string yahoo on www.nagios.com and if found returns OK, fails if not found                                                                                                             
HTTP CRITICAL - string not found|time=0.685802s;;;0.000000 size=38262B;;;0

./check_http -H www.nagios.com -s nagios     - Checks for string nagios on www.nagios.com and if found returns OK, fails if not found                                                                                                        
HTTP OK HTTP/1.1 200 OK - 0.709 second response time |time=0.709339s;;;0.000000 size=38332B;;;0

./check_http -H www.nagios.com --invert-regex yahoo     - Checks for string yahoo on www.nagios.com and if found returns Critical, OK if not found                                                                                                
HTTP OK - HTTP/1.0 303 See Other - 0.128 second response time |time=0.128157s;;;0.000000 size=193B;;;0

Hope that helps!

Posted: **Mon Dec 31, 2012 5:07 am**

Thanks!!

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