;;; -*- Mode: LISP; Syntax: COMMON-LISP; Package: CL-WEBDAV; Base: 10 -*- ;;; $Header: /usr/local/cvsrep/cl-webdav/authorized-file-resources.lisp,v 1.7 2007/04/18 19:21:00 edi Exp $ ;;; Copyright (c) 2007-2010, Dr. Edmund Weitz. All rights reserved. ;;; Redistribution and use in source and binary forms, with or without ;;; modification, are permitted provided that the following conditions ;;; are met: ;;; * Redistributions of source code must retain the above copyright ;;; notice, this list of conditions and the following disclaimer. ;;; * Redistributions in binary form must reproduce the above ;;; copyright notice, this list of conditions and the following ;;; disclaimer in the documentation and/or other materials ;;; provided with the distribution. ;;; THIS SOFTWARE IS PROVIDED BY THE AUTHOR 'AS IS' AND ANY EXPRESSED ;;; OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED ;;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ;;; ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY ;;; DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL ;;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE ;;; GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS ;;; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, ;;; WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING ;;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ;;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. (in-package :cl-webdav) (defclass authorized-file-resource (file-resource) () (:documentation "A subclass of FILE-RESOURCE representing file resources which are associated with a certain user.")) (defmethod create-dav-dispatcher :around ((resource-class (eql 'authorized-file-resource)) &optional ms-workaround-p) "This :AROUND method wraps the normal DAV dispatcher with one that checks basic HTTP authentication first." (let ((normal-dispatcher (call-next-method))) (lambda (request) (or (options-dispatcher request) (let ((handler (funcall normal-dispatcher request))) (when handler (multiple-value-bind (user password) (authorization request) (cond ((and user ;; we allow only certain characters (ppcre:scan "^[a-zA-Z0-9_-]+$" user) ;; password must match user name, test is ;; case-insensitive (equalp user password)) handler) (t #'require-authorization))))))))) (defmethod file-resource-base-path-namestring ((resource-class (eql 'authorized-file-resource))) "We compute the base path by attaching the downcased user name to the base path returned for plain file resources. We also create the directory if necessary." (namestring (truename (ensure-directories-exist (format nil "~A~A/" (file-resource-base-path-namestring 'file-resource) ;; note that this assumes that we're within a HTTP request ;; which is OK (string-downcase (authorization))))))) (defmethod accept-request-p ((resource-class (eql 'authorized-file-resource)) request) "We just use the method for FILE-RESOURCE." (accept-request-p 'file-resource request))