when HTTP_REQUEST {

# Assume there is no redirections/rewrites

	set isRedirected false

# Variable used by the rand() function. Varies from 0 to 1. Examples : 0.05 is 5%, 0.50 is 50%.

   set percentage 0

# This variable will be set to a Pool name and sent to the client as a cookie (yp_mobile_backend)

   set pool_selected ""

# Variable used to trigger redirections/rewrites needed when requests are sent to ResponsiveWeb only.

   set toResponsiveWeb false

# Get yp_mobile_responsive1 cookie from browser. Use it if it matches one of the existing pools :

# CANPAGES_WEB_POOL_01 = Responsive web pool

   switch [HTTP::cookie yp_mobile_responsive1] {

      CANPAGES_WEB_POOL_01 {

         pool [HTTP::cookie yp_mobile_responsive1]

         set toResponsiveWeb true

      }

      default {

# If no cookie exists, use the rand() function to calculate a number from 0 to 1.

# If the number is less than 0.01 (i.e. 1%), proxy the request to the Responsive Web pool.

# Else, proxy the request to the Amazon Mobile Web pool.

# Add the name of the pool to the $selected variable so we can later send the cookie and its value in the response.

         if { rand() < $percentage } {

			if {[HTTP::host] equals "mobile.canpages.ca" } 	{
				[HTTP::header replace "Host" "canpages.ca"]
			}

            pool CANPAGES_WEB_POOL_01

            set toResponsiveWeb true

            set pool_selected CANPAGES_WEB_POOL_01

         } else {

			if {[[HTTP::host] equals "mobile.canpages.ca"] } {

			HTTP::respond 301 Location http://mobile.canpages.ca[HTTP::uri]

            pool CANPAGES_EXTERNAL_POOL_01

			set pool_selected CANPAGES_EXTERNAL_POOL_01

            set isRedirected true

			}

         }

      }

   }


   }
when HTTP_RESPONSE {

# If a pool name was added to the $selected variable, send that value inside the yp_mobile_responsive1 cookie

   if {$pool_selected ne ""}{

      HTTP::cookie insert name yp_mobile_responsive1 value $selected path "/"

   }

}