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ukitsysadmin_95's avatar
ukitsysadmin_95
Icon for Nimbostratus rankNimbostratus
Jun 04, 2009

redirect example.xx to www.example.xx

Hello

 

 

I'm new to irules, and would love some help on creating an irule for my problem below

 

 

Our web farm hosts a single domain name, but multiple geographic suffix's. e.g.

 

example.co.uk

 

example.be

 

example.fr

 

example.se

 

 

Now our back-end database will only accept www.example.xx (xx = country suffix)

 

 

So what we have to do is the following

 

 

DNS A records for

 

www point straight to our web farm (the database will accept www.example.xx)

 

 

But for anyone who uses the url, without www

 

example.co.uk

 

example.be

 

 

we have a standalone web server that redirects the url example.xx to www.example.xx for our site to work

 

 

I know irules can do this but I haven't a clue on where to start, this will improve performance and remove the single point of failure being the standalone web server

 

 

can anyone please help ????

 

 

many thanks in advance

 

 

application delivery
dev
devops
iRules

5 Replies

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  • Colin_Walker_12's avatar
    Colin_Walker_12
    Historic F5 Account
    Jun 04, 2009
    So all you need to do is redirect anything that comes in without www to the www prepended version?

    That's straight-forward: 

     
 when HTTP_REQUEST { 
   if { !([HTTP::host] starts_with "www.") } { 
     HTTP::redirect "http://www.[HTTP::host][HTTP::uri]" 
   } 
 }

    This will take any request coming in to a domain that does not begin with www., and redirect it to the exact same place, but with www. at the beginning of the host name. Of course, this would apply to all domains. If you wanted to limit it to just the domains you listed you could add in a switch statement or a class search, something like that.

    Is this what you were looking for?

    Colin
  • ukitsysadmin_95's avatar
    ukitsysadmin_95
    Icon for Nimbostratus rankNimbostratus
    Jun 05, 2009
    Hi Colin,

     

     

    thats great thanks, how would you add in a swtich statement or class search of data list group, so it make it easier to add domains, etc, etc

     

     

    thanks again

     

     

    James
  • JRahm's avatar
    JRahm
    Icon for Admin rankAdmin
    Jun 05, 2009
    This is domain independent, [HTTP::host] returns the domain that was submitted, and then just prepends www. to it. Now, if you're going to redirect to different domains/uri's based on source, welll that's a different story. Can you provide an example scenario?
  • ukitsysadmin_95's avatar
    ukitsysadmin_95
    Icon for Nimbostratus rankNimbostratus
    Jun 08, 2009
    What i'm wanting to achieve, is the following

     

    just say over the years we have numerous different domains that all used to display different web sites and now we want all the old domain names to point and re-point to their local geographical web site

     

    from my first post, our database will only except these address:

     

    www.abc.co.uk

     

    www.abc.nl

     

    www.abc.be

     

    so on and so on

     

    So I want to redirect any abc.xx to www.abc.xx (xx being geographical suffix)

     

    for example, our main UK site is www.abc.co.uk

     

    all our old domains that we want to repoint would be

     

    abc.co.uk

     

    www.zxy.co.uk

     

    zxy.co.uk

     

    def.co.uk

     

    www.def.co.uk

     

    ghk.co.uk

     

    www.ghk.co.uk

     

    then the same for our dutch sites, www.abc.nl

     

    abc.nl

     

    www.zxy.nl

     

    zxy.nl

     

    def.nl

     

    www.def.nl

     

    ghk.nl

     

    www.ghk.nl

     

    if its possible, can we use a "data list group" to make administering all these domains eaiser in thr future ?

     

    I hope this all makes sense
  • hooleylist's avatar
    hooleylist
    Icon for Cirrostratus rankCirrostratus
    Jun 15, 2009
    If you only want to redirect domains which are listed in a datagroup, you could define them in a datagroup in lowercase and then use an iRule like this: 

     
 when HTTP_REQUEST { 
  
     Check if Host header is present with a length 
    if {[string length [HTTP::host]]}{ 
  
        Save host header value in lowercase 
       set host [string tolower [HTTP::host]] 
  
        Check if Host header does not start with www 
       if {!($host starts_with "www.")}{ 
  
           Check if host is listed in the domain datagroup 
          if {[matchclass $host equals $::domains_to_redirect]}{ 
  
              Redirect client to same URI but with www prepended to the host header value 
             HTTP::redirect "http://www.[HTTP::host][HTTP::uri]"  
          } 
       } 
    } 
 }

    Aaron