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;;; url-ldap.el --- LDAP Uniform Resource Locator retrieval code
;; Author: $Author: wmperry $
;; Created: $Date: 1999/11/26 12:11:50 $
;; Version: $Revision: 1.1.1.1 $
;; Keywords: comm, data, processes
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Copyright (c) 1998 - 1999 Free Software Foundation, Inc.
;;;
;;; This file is part of GNU Emacs.
;;;
;;; GNU Emacs 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.
;;;
;;; GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to the
;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;;; Boston, MA 02111-1307, USA.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(require 'url-vars)
(require 'url-parse)
(require 'url-util)
;; This has been implemented from RFC2255 'The LDAP URL Format' (Dec 1997)
;;
;; basic format is: ldap://host:port/dn?attributes?scope?filter?extensions
;;
;; Test URLs:
;; ldap://ldap.itd.umich.edu/cn%3Dumbflabmanager%2C%20ou%3DUser%20Groups%2C%20ou%3DGroups%2C%20o%3DUniversity%20of%20Michigan%2C%20c%3DUS
;; ldap://ldap.itd.umich.edu/o=University%20of%20Michigan,c=US
;;
;; For simple queries, I have verified compatibility with Netscape
;; Communicator v4.5 under linux.
;;
;; For anything _useful_ though, like specifying the attributes,
;; scope, filter, or extensions, netscape claims the URL format is
;; unrecognized. So I don't think it supports anything other than the
;; defaults (scope=base,attributes=*,filter=(objectClass=*)
(defconst url-ldap-default-port 389 "Default LDAP port.")
(defalias 'url-ldap-expand-file-name 'url-default-expander)
(defvar url-ldap-pretty-names
'(("l" . "City")
("objectclass" . "Object Class")
("o" . "Organization")
("ou" . "Organizational Unit")
("cn" . "Name")
("sn" . "Last Name")
("givenname" . "First Name")
("mail" . "Email")
("title" . "Title")
("c" . "Country")
("postalcode" . "ZIP Code")
("telephonenumber" . "Phone Number")
("facsimiletelephonenumber" . "Fax")
("postaladdress" . "Mailing Address")
("description" . "Notes"))
"*An assoc list mapping LDAP attribute names to pretty descriptions of them.")
(defvar url-ldap-attribute-formatters
'(("mail" . (lambda (x) (format "<a href='mailto:%s'>%s</a>" x x)))
("owner" . url-ldap-dn-formatter)
("creatorsname" . url-ldap-dn-formatter)
("jpegphoto" . url-ldap-image-formatter)
("usercertificate" . url-ldap-certificate-formatter)
("modifiersname" . url-ldap-dn-formatter)
("namingcontexts" . url-ldap-dn-formatter)
("defaultnamingcontext" . url-ldap-dn-formatter)
("member" . url-ldap-dn-formatter))
"*An assoc list mapping LDAP attribute names to pretty formatters for them.")
(defsubst url-ldap-attribute-pretty-name (n)
(or (cdr-safe (assoc (downcase n) url-ldap-pretty-names)) n))
(defsubst url-ldap-attribute-pretty-desc (n v)
(if (string-match "^\\([^;]+\\);" n)
(setq n (match-string 1 n)))
(funcall (or (cdr-safe (assoc (downcase n) url-ldap-attribute-formatters)) 'identity) v))
(defun url-ldap-dn-formatter (dn)
(concat "<a href='/"
(url-hexify-string dn)
"'>" dn "</a>"))
(defun url-ldap-certificate-formatter (data)
(condition-case ()
(require 'ssl)
(error nil))
(let ((vals (and (fboundp 'ssl-certificate-information)
(ssl-certificate-information data))))
(if (not vals)
"<b>Unable to parse certificate</b>"
(concat "<table border=0>\n"
(mapconcat
(lambda (ava)
(format "<tr><td>%s</td><td>%s</td></tr>\n" (car ava) (cdr ava)))
vals "\n")
"</table>\n"))))
(defun url-ldap-image-formatter (data)
(format "<img alt='JPEG Photo' src='data:image/jpeg;base64,%s'>"
(url-hexify-string (base64-encode-string data))))
;;;###autoload
(defun url-ldap (url)
(save-excursion
(set-buffer (generate-new-buffer " *url-ldap*"))
(setq url-current-object url)
(insert "Content-type: text/html\r\n\r\n")
(if (not (fboundp 'ldap-search-internal))
(insert "<html>\n"
" <head>\n"
" <title>LDAP Not Supported</title>\n"
" <base href='" (url-recreate-url url) "'>\n"
" </head>\n"
" <body>\n"
" <h1>LDAP Not Supported</h1>\n"
" <p>\n"
" This version of Emacs does not support LDAP.\n"
" </p>\n"
" </body>\n"
"</html>\n")
(let* ((binddn nil)
(data (url-filename url))
(host (url-host url))
(port (url-port url))
(base-object nil)
(attributes nil)
(scope nil)
(filter nil)
(extensions nil)
(connection nil)
(results nil)
(extract-dn (and (fboundp 'function-max-args)
(= (function-max-args 'ldap-search-internal) 7))))
;; Get rid of leading /
(if (string-match "^/" data)
(setq data (substring data 1)))
(setq data (mapcar (lambda (x) (if (/= (length x) 0) x nil)) (split-string data "\\?"))
base-object (nth 0 data)
attributes (nth 1 data)
scope (nth 2 data)
filter (nth 3 data)
extensions (nth 4 data))
;; fill in the defaults
(setq base-object (url-unhex-string (or base-object ""))
scope (intern (url-unhex-string (or scope "base")))
filter (url-unhex-string (or filter "(objectClass=*)")))
(if (not (memq scope '(base one tree)))
(error "Malformed LDAP URL: Unknown scope: %S" scope))
;; Convert to the internal LDAP support scoping names.
(setq scope (cdr (assq scope '((base . base) (one . onelevel) (sub . subtree)))))
(if attributes
(setq attributes (mapcar 'url-unhex-string (split-string attributes ","))))
;; Parse out the exentions
(if extensions
(setq extensions (mapcar (lambda (ext)
(if (string-match "\\([^=]*\\)=\\(.*\\)" ext)
(cons (match-string 1 ext) (match-string 2 ext))
(cons ext ext)))
(split-string extensions ","))
extensions (mapcar (lambda (ext)
(cons (url-unhex-string (car ext))
(url-unhex-string (cdr ext))))
extensions)))
(setq binddn (cdr-safe (or (assoc "bindname" extensions)
(assoc "!bindname" extensions))))
;; Now, let's actually do something with it.
(setq connection (ldap-open host (if binddn (list 'binddn binddn)))
results (if extract-dn
(ldap-search-internal connection filter base-object scope attributes nil t)
(ldap-search-internal connection filter base-object scope attributes nil)))
(ldap-close connection)
(insert "<html>\n"
" <head>\n"
" <title>LDAP Search Results</title>\n"
" <base href='" (url-recreate-url url) "'>\n"
" </head>\n"
" <body>\n"
" <h1>" (int-to-string (length results)) " matches</h1>\n")
(mapc (lambda (obj)
(insert " <hr>\n"
" <table border=1>\n")
(if extract-dn
(insert " <tr><th colspan=2>" (car obj) "</th></tr>\n"))
(mapc (lambda (attr)
(if (= (length (cdr attr)) 1)
;; single match, easy
(insert " <tr><td>"
(url-ldap-attribute-pretty-name (car attr))
"</td><td>"
(url-ldap-attribute-pretty-desc (car attr) (car (cdr attr)))
"</td></tr>\n")
;; Multiple matches, slightly uglier
(insert " <tr>\n"
(format " <td valign=top>" (length (cdr attr)))
(url-ldap-attribute-pretty-name (car attr)) "</td><td>"
(mapconcat (lambda (x)
(url-ldap-attribute-pretty-desc (car attr) x))
(cdr attr)
"<br>\n")
"</td>"
" </tr>\n")))
(if extract-dn (cdr obj) obj))
(insert " </table>\n"))
results)
(insert " <hr>\n"
" </body>\n"
"</html>\n")))
(current-buffer)))
(provide 'url-ldap)
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