; tcp/ip samples

; retrieve currency exchange rates
; via FXP protocol
; use international currency codes
; like EUR, USD, DEM, ATS etc. as
; parameters
(define (rate from to)
  (let* ((sock (make-client-socket
	"fxp.oanda.com" 5011))
	(in (socket-input sock))
	(out (socket-output sock)))
    (display "fxp/1.1#0d#0a" out)
    (display "quotecurrency: " out)
    (display from out)
    (display "#0d#0a" out)
    (display "basecurrency: " out)
    (display to out)
    (display "#0d#0a#0d#0a" out)
    (read-line in)
    (read-line in)
    (read-line in)
    (let ((rate (read in)))
	(socket-shutdown sock)
	rate)))

; retrieve current time from atomic
; clock in Braunschweig, Germany
(define (atomic-time)
 (let ((sock (make-client-socket
	"ptbtime1.ptb.de" 13)))
    (write (read-line 
	(socket-input sock)))
    (socket-shutdown sock) #n))"