alias download {
  if ($sock(download)) echo -a There is already a download in progress, please wait until it has finished.
  else {
    %dl.file = $1
    if ($file($nopath(%dl.file))) write -c $nopath(%dl.file)
    sockopen download $http.parse($1).host 80
  }
}
on *:SOCKOPEN:download:{
  sockwrite -nt $sockname GET $http.parse(%dl.file).path HTTP/1.1
  sockwrite -nt $sockname Host: $+($http.parse(%dl.file).host,$str($crlf,2))
}
on *:SOCKREAD:download:{
  if (%dl.header != 1) {
    var %header
    sockread %header
    while ($sockbr) {
      if (Content-length: * iswm %header) {
        %dl.length = $gettok(%header,2,32)
        echo -a Filesize of $+($nopath(%dl.file),:) $bytes(%dl.length,b) bytes
      }
      if (!%header) {
        %dl.header = 1
        break
      }
      sockread %header
    }
  }
  echo -a Beginning download.
  sockread 4096 &data
  while ($sockbr) {
    bwrite $nopath(%dl.file) -1 -1 &data
    sockread 4096 &data
  }
}
on *:SOCKCLOSE:download:{
  echo -a Download of $nopath(%dl.file) completed.
  unset %dl.*
}
alias http.parse {
  if ($regex($1-,^http://([^/]+)(/.*))) {
    if ($prop == host) return $regml(1)
    if ($prop == path) return $iif(($regml(2)),$regml(2),/)
  }
}