;;; www/main.scm --- General WWW navigation aids.

;; 	Copyright (C) 1997,2001,2002 Free Software Foundation, Inc.
;;
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this software; see the file COPYING.  If not, write to
;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
;; Boston, MA 02111-1307 USA

;;; Commentary:

;; This module exports the following procedures:
;;   (www:set-protocol-handler! proto handler)
;;   (www:get url-str)

;;; Code:

(define-module (www main)
  :use-module (www http)
  :use-module (www url))


(define dispatch-table
  (acons 'http http:get '()))

;; (www:get URL)
;;   parse a URL into portions, open a connection, and retrieve
;;   selected document

(define-public (www:set-protocol-handler! proto handler)
  (set! dispatch-table
	(assq-set! dispatch-table proto handler)))

(define-public (www:get url-str)
  (let ((url (url:parse url-str)))
    ;; get handler for this protocol
    (case (url:scheme url)
      ((http) (let ((msg (http:get url)))
                (http:message-body msg)))
      (else
       (let ((handle (assq-ref dispatch-table (url:scheme url))))
	 (if handle
	     (handle (url:host url)
		     (url:port url)
		     (url:path url))
	     (error "unknown URL scheme" (url:scheme url))))))))

;;; www/main.scm ends here