negate a regular expression

[mlmll]

Hi all,

(Q1) I'd like to know if it's possible to negate a regular expression in general, and in htaccess files in particular, and if so, what's the operator ?

For instance, I'd like to negate the regexp

[tt]
^Mozilla
[/tt]

...so in human language, the criteria gives "does not start by 'Mozilla'"

(Q2) Also, do we have logical operators at hand within htaccess files ?

Browsed the docs/newsgroups/web and couldn't find any answer (I'm afraid answer to Q2 is no, but c'mon, there must be solutions for Q1 ! ;-) )

Thanks a lot for any hint.

 

[ifincham]

Hi,

Well with grep etc you can use the -v flag to negate the expression. For mod_rewrite, etc., you should be able to use a ! (logical NOT) prefix. See -->

http://httpd.apache.org/docs/mod/mod_rewrite.html

.

Regards

 

[mlmll]

Thanks ifincham for your hints.

I think I finally found a way to achieve what I want without having to negate any regular expression through this :

[tt]SetEnvIfNoCase Referer ^$ allowed_referer
SetEnvIfNoCase Referer ^

http://friendly\.site\.com

allowed_referer
SetEnvIfNoCase Referer ^

http://my\.site\.com

allowed_referer

#straps and belt
SetEnvIfNoCase Referer voila\.fr forbidden_referer
SetEnvIfNoCase Referer voila\.com forbidden_referer

#block spiders
BrowserMatch ^Mozilla allowed_agent
BrowserMatch ^Opera allowed_agent
#and for "Mozilla/4.0 (compatible; MSIE 5.0; Windows 95) TrueRobot; 1.4" (voila), squash 'em
BrowserMatch TrueRobot forbidden_agent
BrowserMatch Echo2 forbidden_agent


Order Allow,Deny
Allow from env=allowed_referer
Allow from env=allowed_agent
Deny from env=forbidden_agent
Deny from env=forbidden_referer[/tt]

Though, when I come to my.site.com through a link from google.com, access is allowed !! How come ?

Cheers,