Rewriting - syntax

For performance reasons I'd suggest an else in there... However you may also want to investigate using a switch statement, or using a class (DataGroup) and the findclass/class commands to lookup the recieved host and return the redirection host (The findclass should scale better, and mean you don't have to re-write your iRule whenever you add a new host).

e.g. (Without checking for syntax, this is for v10)

  
  when HTTP_REQUEST {   
    set redirecthost [class search -value "theclass" equals [HTTP::host]]   
    if { $redirecthost ne "" } {  
      HTTP::redirect $redirecthost  
    }  
  }  
  

You can add the embelishments...

We are running v 9.4.7.

 

 

I will modify the iRule to use if and elseif - would this show us the best performance?

This triggers an error - forgive me, I'm not too familiar with syntax:

01070151:3: Rule [cplanning-rewrite] error:  
 line 8: [undefined procedure: elseif] [elseif { ([HTTP::host] eq "ourdomain.com") } {  
 switch -glob [HTTP::host] {  
 "/" { HTTP::redirect "http://anotherdomain.com" }  
 default { HTTP::redirect "http://anotherdomain.com[HTTP::uri]" } 
 }  
 } ] 
 

The iRule:

 
 when HTTP_REQUEST {  
     if { ([HTTP::host] eq "www.ourdomain.com") } {  
         switch -glob [HTTP::host] {  
              "/" { HTTP::redirect "http://anotherdomain.com" }  
              default {  HTTP::redirect "http://anotherdomain.com[HTTP::uri]" } 
         }  
     }  
     elseif { ([HTTP::host] eq "ourdomain.com") } {  
         switch -glob [HTTP::host] {  
              "/" { HTTP::redirect "http://anotherdomain.com" }  
              default {  HTTP::redirect "http://anotherdomain.com[HTTP::uri]" } 
         }  
     }  
 } 
 

Hi Joe,

I think the use of the syntax might be a bit off

Here is what I think it might look like

   
   when HTTP_REQUEST {   
       switch -glob [HTTP::host] {   
           "ourdomain.com" -    
           "www.ourdomain.com" {   
                  HTTP::redirect "http://anotherdomain.com[HTTP::uri]"   
                                                     }   
       }   
   }  
   

I hope this helps

Bhattman

So the "-" in between the hosts means either or?

Hi Joe,

I think this consolidated version should do the same:

  
  when HTTP_REQUEST {    
     switch [string tolower [HTTP::host]] {    
        "ourdomain.com" -     
        "www.ourdomain.com" {    
           "http://anotherdomain.com[HTTP::uri]"  
        }  
     }    
  }   
  

http://www.tcl.tk/man/tcl8.4/TclCmd/switch.htm

If a body is specified as - it means that the body for the next pattern should also be used as the body for this pattern (if the next pattern also has a body of - then the body after that is used, and so on). This feature makes it possible to share a single body among several patterns.

Aaron

A big thank you to everyone who helped out. I appreciate your time!