irule redirect and switch -glob

I gather you are trying to use partial matching with the -glob option. Try this...

when HTTP_REQUEST {
  switch -glob [string tolower [HTTP::uri]] {
    "/filetransfer*" { pool "mix_prod_v1_filetransfer" }
    "*/view.net" { pool "mix_prod_v1_view" }
    "*/webimagedownloader/*" { pool "mix_prod_v1_webimage" }
    default { pool "mix2prod.test_pool" }
  }
}

I've included all three type of pattern matching. Adjust as needed.

item* -- starts with item
*item -- ends with item
*item* -- contains item