Is it possible to replace extended ASCII characters in URI to UTF-8 character set

based on kevin's code, you can try this...

when RULE_INIT {
    set map_list [list]
    for {set i 128} {$i<192} {incr i} {
        lappend map_list [binary format c $i] %C2%[format %X $i]
    }
        for {set i 192} {$i<256} {incr i} {
        lappend map_list [binary format c $i] %C3%[format %X $i]
    }
    set static::extended_ascii_map_list $map_list
}

when HTTP_REQUEST {
    HTTP::uri [string map $static::extended_ascii_map_list [HTTP::uri]]
}