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add a simple cache

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* tekuti/cache.scm: Add a simple cache.
This commit is contained in:
Andy Wingo 2010-12-03 19:59:32 +01:00
parent 55617ccff2
commit c099b9532c
2 changed files with 48 additions and 0 deletions
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1
Makefile.am
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@ -3,6 +3,7 @@ moddir=$(prefix)/share/guile/site
SOURCES = \
tekuti/base64.scm \
tekuti/boot.scm \
tekuti/cache.scm \
tekuti/comment.scm \
tekuti/config.scm \
tekuti/filters.scm \

47
tekuti/cache.scm Normal file
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@ -0,0 +1,47 @@
;; Tekuti
;; Copyright (C) 2010 Andy Wingo <wingo at pobox dot com>
;; 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 3 of
;; the License, 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 program; if not, contact:
;;
;; Free Software Foundation Voice: +1-617-542-5942
;; 59 Temple Place - Suite 330 Fax: +1-617-542-2652
;; Boston, MA 02111-1307, USA gnu@gnu.org
;;; Commentary:
;;
;; A cache for responses.
;;
;;; Code:
(define-module (tekuti cache)
#:use-module (web request)
#:export (cache-hit?
cache-ref
cache-set))
(define (cache-hit? cache master request)
(and cache
(equal? (car cache) master)
(eq? (request-method request) 'GET)
(assoc (request-uri request) (cdr cache))
#t))
(define (cache-ref cache master request)
(apply values (assoc-ref (cdr cache) (request-uri request))))
(define (cache-set cache master request . args)
(append (if (and cache (< (length cache) 20))
cache
(list master))
(acons (request-uri request) args '())))