lisp/net/eudcb-ph.el

   1 ;;; eudcb-ph.el --- Emacs Unified Directory Client - CCSO PH/QI Backend
   2
   3 ;; Copyright (C) 1998-2011 Free Software Foundation, Inc.
   4
   5 ;; Author: Oscar Figueiredo <oscar@cpe.fr>
   6 ;; Maintainer: Pavel Janík <Pavel@Janik.cz>
   7 ;; Keywords: comm
   8 ;; Package: eudc
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26
  27 ;;    This library provides specific CCSO PH/QI protocol support for the
  28 ;;    Emacs Unified Directory Client package.
  29
  30 ;;; Code:
  31
  32 (require 'eudc)
  33
  34 ;;{{{      Internal cooking
  35
  36 (eudc-protocol-set 'eudc-bbdb-conversion-alist 'eudc-ph-bbdb-conversion-alist 'ph)
  37 (eudc-protocol-set 'eudc-query-function 'eudc-ph-query-internal 'ph)
  38 (eudc-protocol-set 'eudc-list-attributes-function 'eudc-ph-get-field-list 'ph)
  39 (eudc-protocol-set 'eudc-protocol-has-default-query-attributes t 'ph)
  40
  41 (defvar eudc-ph-process-buffer nil)
  42 (defvar eudc-ph-read-point)
  43
  44 (defconst eudc-ph-default-server-port 105
  45   "Default TCP port for CCSO PH/QI directory services.")
  46
  47 (defun eudc-ph-query-internal (query &optional return-fields)
  48   "Query the PH/QI server with QUERY.
  49 QUERY can be a string NAME or a list made of strings NAME
  50 and/or cons cells (KEY . VALUE) where KEYs should be valid
  51 CCSO database keys.  NAME is equivalent to (DEFAULT . NAME),
  52 where DEFAULT is the default key of the database.
  53 RETURN-FIELDS is a list of database fields to return,
  54 defaulting to `eudc-default-return-attributes'."
  55   (let (request)
  56     (if (null return-fields)
  57         (setq return-fields eudc-default-return-attributes))
  58     (if (eq 'all return-fields)
  59         (setq return-fields '(all)))
  60     (setq request
  61           (concat "query "
  62                   (if (stringp query)
  63                       query
  64                     (mapconcat (function (lambda (elt)
  65                                            (if (stringp elt) elt)
  66                                            (format "%s=%s" (car elt) (cdr elt))))
  67                                query
  68                                " "))
  69                   (if return-fields
  70                       (concat " return " (mapconcat 'symbol-name return-fields " ")))))
  71     (and (> (length request) 6)
  72          (eudc-ph-do-request request)
  73          (eudc-ph-parse-query-result return-fields))))
  74
  75 (defun eudc-ph-get-field-list (full-records)
  76   "Return a list of valid field names for the current server.
  77 If FULL-RECORDS is non-nil, full records including field description
  78 are returned"
  79   (interactive)
  80   (eudc-ph-do-request "fields")
  81   (if full-records
  82       (eudc-ph-parse-query-result)
  83     (mapcar 'eudc-caar (eudc-ph-parse-query-result))))
  84
  85 (defun eudc-ph-parse-query-result (&optional fields)
  86   "Return a list of alists of key/values from in `eudc-ph-process-buffer'.
  87 Fields not in FIELDS are discarded."
  88   (let (record
  89         records
  90         line-regexp
  91         current-key
  92         key
  93         value
  94         ignore)
  95     (save-excursion
  96       (message "Parsing results...")
  97       (set-buffer eudc-ph-process-buffer)
  98       (goto-char (point-min))
  99       (while (re-search-forward "^\\(-[0-9]+\\):\\([0-9]+\\):" nil t)
 100         (catch 'ignore
 101           (setq line-regexp (concat "^\\(-[0-9]+\\):" (match-string 2) ":[ \t]*\\([-a-zA-Z_]*\\)?:[ \t]*\\(.*\\)$"))
 102           (beginning-of-line)
 103           (setq record nil
 104                 ignore nil
 105                 current-key nil)
 106           (while (re-search-forward line-regexp nil t)
 107             (catch 'skip-line
 108               (if (string= "-508" (match-string 1))
 109                   ;; A field is missing in this entry.  Skip it or skip the
 110                   ;; whole record (see `eudc-strict-return-matches')
 111                   (if (not eudc-strict-return-matches)
 112                       (throw 'skip-line t)
 113                     (while (re-search-forward line-regexp nil t))
 114                     (setq ignore t)
 115                     (throw 'ignore t)))
 116               (setq key   (and (not (string= (match-string 2) ""))
 117                                (intern (match-string 2)))
 118                     value (match-string 3))
 119               (if (and current-key
 120                        (eq key current-key))
 121                   (setq key nil)
 122                 (setq current-key key))
 123               (if (or (null fields)
 124                       (eq 'all fields)
 125                       (memq current-key fields))
 126                   (if key
 127                       (setq record (cons (cons key value) record)) ; New key
 128                     (setcdr (car record) (if (listp (eudc-cdar record))
 129                                              (append (eudc-cdar record) (list value))
 130                                            (list (eudc-cdar record) value))))))))
 131         (and (not ignore)
 132              (or (null fields)
 133                  (eq 'all fields)
 134                  (setq record (nreverse record)))
 135              (setq record (if (not (eq 'list eudc-duplicate-attribute-handling-method))
 136                               (eudc-filter-duplicate-attributes record)
 137                             (list record)))
 138              (setq records (append record records)))))
 139     (message "Done")
 140     records))
 141
 142 (defun eudc-ph-do-request (request)
 143   "Send REQUEST to the server.
 144 Wait for response and return the buffer containing it."
 145   (let (process
 146         buffer)
 147     (unwind-protect
 148         (progn
 149           (message "Contacting server...")
 150           (setq process (eudc-ph-open-session))
 151           (if process
 152               (with-current-buffer (setq buffer (process-buffer process))
 153                 (eudc-ph-send-command process request)
 154                 (message "Request sent, waiting for reply...")
 155                 (eudc-ph-read-response process))))
 156       (if process
 157           (eudc-ph-close-session process)))
 158     buffer))
 159
 160 (defun eudc-ph-open-session (&optional server)
 161   "Open a connection to the given CCSO/QI SERVER.
 162 SERVER is either a string naming the server or a list (NAME PORT)."
 163   (let (process
 164         host
 165         port)
 166     (catch 'done
 167       (if (null server)
 168           (setq server (or eudc-server
 169                            (call-interactively 'eudc-ph-set-server))))
 170       (string-match "\\(.*\\)\\(:\\(.*\\)\\)?" server)
 171       (setq host (match-string 1 server))
 172       (setq port (or (match-string 3 server)
 173                      eudc-ph-default-server-port))
 174       (setq eudc-ph-process-buffer (get-buffer-create (format " *PH-%s*" host)))
 175       (with-current-buffer eudc-ph-process-buffer
 176         (erase-buffer)
 177         (setq eudc-ph-read-point (point))
 178         (and (featurep 'xemacs) (featurep 'mule)
 179              (set-buffer-file-coding-system 'binary t)))
 180       (setq process (open-network-stream "ph" eudc-ph-process-buffer host port))
 181       (if (null process)
 182           (throw 'done nil))
 183       (set-process-query-on-exit-flag process t)
 184       process)))
 185
 186 (defun eudc-ph-close-session (process)
 187   (with-current-buffer (process-buffer process)
 188     (eudc-ph-send-command process "quit")
 189     (eudc-ph-read-response process)
 190     (run-at-time 2 nil 'delete-process process)))
 191
 192 (defun eudc-ph-send-command (process command)
 193   (goto-char (point-max))
 194   (process-send-string process command)
 195   (process-send-string process "\r\n")
 196   )
 197
 198 (defun eudc-ph-read-response (process &optional return-response)
 199   "Read a response from the PH/QI query process PROCESS.
 200 Returns nil if response starts with an error code.  If the
 201 response is successful the return code or the response itself is returned
 202 depending on RETURN-RESPONSE."
 203   (let ((case-fold-search nil)
 204         return-code
 205         match-end)
 206     (goto-char eudc-ph-read-point)
 207     ;; CCSO protocol : response complete if status >= 200
 208     (while (not (re-search-forward "^\\(^[2-5].*\\):.*\n" nil t))
 209       (accept-process-output process)
 210       (goto-char eudc-ph-read-point))
 211     (setq match-end (point))
 212     (goto-char eudc-ph-read-point)
 213     (if (and (setq return-code (match-string 1))
 214              (setq return-code (string-to-number return-code))
 215              (>= (abs return-code) 300))
 216         (progn (setq eudc-ph-read-point match-end) nil)
 217       (setq eudc-ph-read-point match-end)
 218       (if return-response
 219           (buffer-substring (point) match-end)
 220         return-code))))
 221
 222 ;;}}}
 223
 224 ;;{{{      High-level interfaces (interactive functions)
 225
 226 (defun eudc-ph-customize ()
 227   "Customize the EUDC PH support."
 228   (interactive)
 229   (customize-group 'eudc-ph))
 230
 231 (defun eudc-ph-set-server (server)
 232   "Set the PH server to SERVER."
 233   (interactive "sNew PH/QI Server: ")
 234   (message "Selected PH/QI server is now %s" server)
 235   (eudc-set-server server 'ph))
 236
 237 ;;}}}
 238
 239 (eudc-register-protocol 'ph)
 240
 241 (provide 'eudcb-ph)
 242
 243 ;;; eudcb-ph.el ends here