irulse for http request

when HTTP_REQUEST { 
   if { [HTTP::host] equals "gp.study.teacheredu.cn" } { 
      pool gp_study_teacheredu 
   } elseif { [HTTP::uri] equals "http://study.teacheredu.cn/proj/proj/tlogin/hbGp?token=" } { 
      pool study_teacheredu_gpnl 
   } elseif { [HTTP::uri] equals "http://study.teacheredu.cn/proj/proj/tlogin/hbNl?token=" } { 
      pool study_teacheredu_gpnl 
   } else { 
      pool study_teacheredu 
   } 
}

Maybe try it this way...

when HTTP_REQUEST {
   if { [string tolower [HTTP::host]] equals "gp.study.teacheredu.cn" } {
      pool gp_study_teacheredu
   } else {
      switch -glob [HTTP::uri] {
         "/proj/proj/tlogin/hbGp?token=*" { 
            pool study_teacheredu_gpnl 
         }
         "/proj/proj/tlogin/hbNl?token=*" { 
            pool study_teacheredu_gpnl 
         }
         default { 
            pool study_teacheredu 
         }
      }
   }
}