Io::all::lwp acts as glue between io::all and lwp, so that files can be read and written through the network using the convenient io:all interface. note that this module is not used directly: you just use io::all, which knows when to autoload io::all::http, io::all::https, io::all::ftp, or io::all::gopher, which implement the specific protocols based on io::all::lwp.