double wildcard match for uri patterns

Hi Jay,

You can use string match with multiple wildcards:

 
 string match -nocase "*pattern*" "some string" 
 

Or you could use the -glob flag for switch:

 
 switch -glob [string tolower [HTTP::uri]] { 
    "uri1*xxxURI2*" { 
       ... 
 

Either string-based option would be more efficient than a regex.

Aaron

Aaron,

 

 

Thanks for the response. However I am unclear on the syntax...

 

 

how does the below look?

 

 

if { [HTTP::uri] equals string match -nocase "portal/aaa/org/memberapp?*pageLabel=application*" } {

 

HTTP::redirect http://redirecttotaget

 

}

 

 

 

 

All I have a total of 3 patterns that i will need to check for... so should I just use or statements ? or try and integrate this with a matchclass I had run into problems using a wildcard with a match class in the past.

 

 

 

Thanks

 

 

If you have multiple patterns you want to check, a switch statement would help keep them organized:

 

 

   
   when HTTP_REQUEST {   
      
       Check requested URI   
      switch -glob [HTTP::uri] {   
         "*pattern1* -   
         "*pattern2* -   
         "*pattern3* {   
             Execute this code for the first three patterns   
            HTTP::redirect "http://first_redirect.example.com"   
         }   
         "*pattern4* -   
         "*pattern5* {   
             Execute this code for the next two patterns   
            HTTP::redirect "http://second_redirect.example.com"   
         }   
         default {   
             Execute this code for the any cases that haven't been matched   
            HTTP::redirect "http://default_redirect.example.com"   
         }   
      }   
   }   
   

 

 

Else, if you wanted to use a single if statement you could do something like this:

 

 

   
   when HTTP_REQUEST {   
      
       Check requested URI   
      if { ([string match -nocase "portal/aaa/org/memberapp?*pageLabel=application*" [HTTP::uri] ]) \   
         or ([string match -nocase "*pattern2*" [HTTP::uri]]) \   
         or ([string match -nocase "*pattern3*" [HTTP::uri]])}{   
      
         log local0. "[IP::client_addr]:[TCP::client_port]: Matched check for [HTTP::uri]"   
         HTTP::redirect http://redirecttotaget   
      }   
   }   
   

 

 

Aaron

great, thanks. which option is more efficient in the irule ?

 

 

Thanks

I've read in the forums and an old article (Click here) that an if statement is more efficient than a switch for a handful of comparisons. After that a switch is more efficient. At some point (around 100 elements) a datagroup would be more efficient than a switch. I haven't actually tested this before though.

 

 

I'd guess the difference isn't huge for a handful of comparisons. I think it's more important that you use a form that's easy for you to read.

 

 

If speed/resource usage is critical for you, you can test the versions using the timing command (Click here).

 

 

Aaron

I dont think for this specific change we are at the point where speed / resource usage is an issues since this will be in place only for a couple of hours.

 

 

I was curious if one was better over the other.

 

 

Thanks for your help.

if i use:

 

 

or ([string match -nocase [HTTP::uri] "/portal/acs/corg/memberapp?jay"]) that works, however if I use:

 

 

 

or ([string match -nocase [HTTP::uri] "/portal/acs/corg/memberapp?*jay=*"])}{ -- seems like the * does not work as a wildcard...

 

any thoughts ?

 

 

thanks

 

 

the 1st or the second wild card neither of them are matched.

 

 

/portal/acs/corg/memberapp?*jay=*

 

 

I tried to use the below uri to test:

 

 

/portal/acs/corg/memberapp?111jay=222; this does not match, I try to swap the *'s individually and same results. I will try to use \ for escaping ?

 

 

Thanks

using:

 

 

or ([string match -nocase [HTTP::uri] "/portal/acs/corg/memberapp/jay?*"])}{

 

 

I get the * to work as a wild card.. what I need is to have a string append at the end of the wild card .

Sorry... I had the pattern and string reversed in my last post. It should be:

 

 

string match -nocase $pattern $string_to_compare

 

 

Aaron