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Robert_47833's avatar
Robert_47833
Icon for Altostratus rankAltostratus
Apr 19, 2011

question about :matches_regex

Hi,met trouble in matches_regex now     difference in expressions below     set uri [HTTP::path]     {$uri matches_regex "^/(cjj)"} { pool cjj01-BRO }     {$uri matches_regex...
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dev
devops
iRules
hooleylist's avatar
hooleylist
Icon for Cirrostratus rankCirrostratus
Apr 19, 2011
Hi,

I think both of those regexes would have the same exact matching. The parentheses would capture a match into a backreference which wouldn't be usable. If you wanted to match a literal ( or ), I think you'd need to escape them with backslashes.

Regardless, if you're just trying to check if the URI starts wtih /cjj or /(cjj), you could use a string pattern instead. This would be significantly more efficient than a regex. 


switch -glob [HTTP::path] {
   "/(cjj)*" { pool cjj01-BRO }
   "/cjj*" { pool cjj01-WSE }
}

Aaron