http::redirect and http::close and not closing the session.

rule foo_uris_rule_v2 {
   when HTTP_REQUEST {
     set host [string tolower [getfield [HTTP::host] ":" 1]]
     set uri  [string tolower [HTTP::uri]]
     set matchstring [substr [substr $uri 1 "?"] 0 "/" ]
     if  { $matchstring == "" }
     {
        set matchstring $host$uri
     }
     else
     {
       set matchstring $host/$matchstring
     }
     set redstring [findclass $matchstring $::foo_uris_list " " ]
     set query_src [findstr [HTTP::uri] "?src=" 5 "&" ]
             if {$query_src == ""}
                  {
                     set query_src [findstr [HTTP::uri] "&src=" 5 "&" ]
                  }
             log local0. "query_src = $query_src"
             set query_trk_src [findstr [HTTP::uri] "trk_src=" 8 " " ]
             log local0. "query_trk_src = $query_trk_src"
             if { $query_src != "" }
             {
                 set redstring $redstring&src=$query_src
             }
             if { $query_trk_src != "" }
             {
                set redstring $redstring&trk_src=$query_trk_src
             }
     if {$redstring eq ""}
     {
        if { $host != "www.foo.com" and $host != "foo.com"}
        {
            set element [findclass "foo.com/" $::foo_uris_list " " ]
            log local0. "Defaulting subdomain to foo.com"
        }
     }
     if {$redstring != ""} {
         log local0. "redirecting to $redstring"
         HTTP::close
         HTTP::redirect $redstring
         HTTP::close
         event disable all
     }
}
}