;;;; Programmer: Kevin M. Rosenberg
;;;; Date Started: Apr 2000
;;;;
-;;;; $Id: web-utils.lisp,v 1.2 2002/10/06 13:30:17 kevin Exp $
+;;;; $Id$
;;;;
-;;;; This file, part of Kmrcl, is Copyright (c) 2002 by Kevin M. Rosenberg
+;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
;;;;
-;;;; Kmrcl users are granted the rights to distribute and use this software
-;;;; as governed by the terms of the GNU General Public License.
+;;;; KMRCL users are granted the rights to distribute and use this software
+;;;; as governed by the terms of the Lisp Lesser GNU Public License
+;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
;;;; *************************************************************************
-(in-package :kmrcl)
-(declaim (optimize (speed 3) (safety 1)))
+(in-package #:kmrcl)
;;; HTML/XML constants
-(defvar *std-xml-header*
- (format nil
- "<?xml version=\"1.0\" ?>~%<?xml-stylesheet type=\"text/css\" href=\"/umlsclass.css\" ?>~%~%"))
+(defvar *standard-xml-header*
+ #.(format nil "<?xml version=\"1.0\" encoding=\"iso-8859-1\" standalone=\"yes\"?>~%"))
-(defun std-xml-header ()
- *std-xml-header*)
+(defvar *standard-html-header* "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML//EN\">")
+
+(defvar *standard-xhtml-header*
+ #.(format nil "<?xml version=\"1.0\" encoding=\"iso-8859-1\" standalone=\"yes\"?>~%<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.1//EN\" \"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd\">"))
+
+
+;;; User agent functions
+
+(defun user-agent-ie-p (agent)
+ "Takes a user-agent string and returns T for Internet Explorer."
+ (or (string-starts-with "Microsoft" agent)
+ (string-starts-with "Internet Explore" agent)
+ (search "Safari" agent)
+ (search "MSIE" agent)))
;;; URL Functions
(defun base-url! (url)
(setq *base-url* url))
-(defun make-url (page-name &key (base-dir *base-url*) (vars nil))
- (concatenate 'string base-dir page-name
- (if vars
- (string-trim-last-character
- (concatenate 'string "?"
- (mapcar-append-string
- #'(lambda (var)
- (when (and (car var) (cadr var))
- (concatenate 'string
- (car var) "=" (cadr var) "&")))
- vars)))
- "")))
+(defun make-url (page-name &key (base-dir *base-url*) (format :html) (vars nil))
+ (let ((amp (case format
+ (:html
+ "&")
+ ((:xml :ie-xml)
+ "&"))))
+ (concatenate 'string
+ base-dir page-name
+ (if vars
+ (let ((first-var (first vars)))
+ (concatenate 'string
+ "?" (car first-var) "=" (cadr first-var)
+ (mapcar-append-string
+ #'(lambda (var)
+ (when (and (car var) (cadr var))
+ (concatenate 'string
+ amp (car var) "=" (cadr var))))
+ (rest vars))))
+ ""))))
+
+(defun make-url-new (page-name &key (base-dir *base-url*) (format :html)
+ (vars nil))
+ (let ((amp (ecase format
+ (:html "&")
+ ((:xml :ie-xml) "&"))))
+ (concatenate 'string
+ base-dir page-name
+ (if vars
+ (let ((first-var (first vars)))
+ (concatenate 'string
+ "?" (car first-var) "=" (cadr first-var)
+ (mapcar-append-string
+ #'(lambda (var)
+ (when (and (car var) (cadr var))
+ (concatenate 'string
+ amp (car var) "=" (cadr var))))
+ (rest vars))))
+ ""))))
+(defun decode-uri-query-string (s)
+ "Decode a URI query string field"
+ (declare (simple-string s)
+ (optimize (speed 3) (safety 0) (space 0)))
+ (do* ((old-len (length s))
+ (new-len (- old-len (* 2 (the fixnum (count-string-char s #\%)))))
+ (new (make-string new-len))
+ (p-old 0)
+ (p-new 0 (1+ p-new)))
+ ((= p-new new-len) new)
+ (declare (simple-string new)
+ (fixnum p-old p-new old-len new-len))
+ (let ((c (schar s p-old)))
+ (when (char= c #\+)
+ (setq c #\space))
+ (case c
+ (#\%
+ (unless (>= old-len (+ p-old 3))
+ (error "#\% not followed by enough characters"))
+ (setf (schar new p-new)
+ (code-char
+ (parse-integer (subseq s (1+ p-old) (+ p-old 3))
+ :radix 16)))
+ (incf p-old 3))
+ (t
+ (setf (schar new p-new) c)
+ (incf p-old))))))