1 ;;; nndoc.el --- single file access for Gnus
2 ;; Copyright (C) 1995 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
5 ;; Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to
22 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
32 (defvar nndoc-article-type 'mbox
33 "*Type of the file - one of `mbox', `babyl' or `digest'.")
35 (defconst nndoc-type-to-regexp
37 (concat "^" rmail-unix-mail-delimiter)
38 (concat "^" rmail-unix-mail-delimiter)
40 (list 'babyl "\^_\^L *\n" "\^_" nil "^$" nil nil)
42 "^------------------------------*[\n \t]+"
43 "^------------------------------[\n \t]+"
45 "^-----------------------------------------*[\n \t]+"
47 "Regular expressions for articles of the various types.")
51 (defvar nndoc-article-begin nil)
52 (defvar nndoc-article-end nil)
53 (defvar nndoc-head-begin nil)
54 (defvar nndoc-head-end nil)
55 (defvar nndoc-first-article nil)
56 (defvar nndoc-end-of-file nil)
58 (defvar nndoc-current-server nil)
59 (defvar nndoc-server-alist nil)
60 (defvar nndoc-server-variables
62 (list 'nndoc-article-type nndoc-article-type)
63 '(nndoc-article-begin nil)
64 '(nndoc-article-end nil)
65 '(nndoc-head-begin nil)
67 '(nndoc-first-article nil)
68 '(nndoc-current-buffer nil)
69 '(nndoc-group-alist nil)
70 '(nndoc-end-of-file nil)
71 '(nndoc-address nil)))
73 (defconst nndoc-version "nndoc 0.1"
76 (defvar nndoc-current-buffer nil
77 "Current nndoc news buffer.")
79 (defvar nndoc-address nil)
83 (defvar nndoc-status-string "")
85 (defvar nndoc-group-alist nil)
87 ;;; Interface functions
89 (defun nndoc-retrieve-headers (sequence &optional newsgroup server)
91 (set-buffer nntp-server-buffer)
94 article p beg end lines)
95 (nndoc-possibly-change-buffer newsgroup server)
96 (if (stringp (car sequence))
98 (set-buffer nndoc-current-buffer)
99 (goto-char (point-min))
100 (re-search-forward (or nndoc-first-article
101 nndoc-article-begin) nil t)
102 (or (not nndoc-head-begin)
103 (re-search-forward nndoc-head-begin nil t))
104 (re-search-forward nndoc-head-end nil t)
106 (setq article (car sequence))
107 (set-buffer nndoc-current-buffer)
108 (if (not (nndoc-forward-article (max 0 (- article prev))))
112 (re-search-backward nndoc-article-begin nil t)
116 (setq lines (count-lines
119 (and (re-search-forward nndoc-article-end nil t)
120 (goto-char (match-beginning 0)))
121 (goto-char (point-max)))))
124 (set-buffer nntp-server-buffer)
125 (insert (format "221 %d Article retrieved.\n" article))
126 (insert-buffer-substring nndoc-current-buffer beg p)
127 (goto-char (point-max))
128 (insert (format "Lines: %d\n" lines))
132 sequence (cdr sequence)))
134 ;; Fold continuation lines.
135 (goto-char (point-min))
136 (while (re-search-forward "\\(\r?\n[ \t]+\\)+" nil t)
137 (replace-match " " t t))
140 (defun nndoc-open-server (server &optional defs)
141 (nnheader-init-server-buffer)
142 (if (equal server nndoc-current-server)
144 (if nndoc-current-server
145 (setq nndoc-server-alist
146 (cons (list nndoc-current-server
147 (nnheader-save-variables nndoc-server-variables))
148 nndoc-server-alist)))
149 (let ((state (assoc server nndoc-server-alist)))
152 (nnheader-restore-variables (nth 1 state))
153 (setq nndoc-server-alist (delq state nndoc-server-alist)))
154 (nnheader-set-init-variables nndoc-server-variables defs)))
155 (setq nndoc-current-server server)
156 (let ((defs (cdr (assq nndoc-article-type nndoc-type-to-regexp))))
157 (setq nndoc-article-begin (nth 0 defs))
158 (setq nndoc-article-end (nth 1 defs))
159 (setq nndoc-head-begin (nth 2 defs))
160 (setq nndoc-head-end (nth 3 defs))
161 (setq nndoc-first-article (nth 4 defs))
162 (setq nndoc-end-of-file (nth 5 defs)))
165 (defun nndoc-close-server (&optional server)
168 (defun nndoc-server-opened (&optional server)
169 (and (equal server nndoc-current-server)
171 (buffer-name nntp-server-buffer)))
173 (defun nndoc-status-message (&optional server)
176 (defun nndoc-request-article (article &optional newsgroup server buffer)
177 (nndoc-possibly-change-buffer newsgroup server)
179 (let ((buffer (or buffer nntp-server-buffer)))
182 (if (stringp article)
184 (nndoc-narrow-to-article article)
185 (insert-buffer-substring nndoc-current-buffer)
188 (defun nndoc-request-group (group &optional server dont-check)
191 (if (not (nndoc-possibly-change-buffer group server))
193 (setq nndoc-status-string "No such file or buffer")
198 (set-buffer nntp-server-buffer)
200 (let ((number (nndoc-number-of-articles)))
203 (nndoc-close-group group)
205 (insert (format "211 %d %d %d %s\n" number 1 number group))
208 (defun nndoc-close-group (group &optional server)
209 (nndoc-possibly-change-buffer group server)
210 (kill-buffer nndoc-current-buffer)
211 (setq nndoc-group-alist (delq (assoc group nndoc-group-alist)
213 (setq nndoc-current-buffer nil)
216 (defun nndoc-request-list (&optional server)
219 (defun nndoc-request-newgroups (date &optional server)
222 (defun nndoc-request-list-newsgroups (&optional server)
225 (defalias 'nndoc-request-post 'nnmail-request-post)
226 (defalias 'nndoc-request-post-buffer 'nnmail-request-post-buffer)
229 ;;; Internal functions.
231 (defun nndoc-possibly-change-buffer (group source)
234 ;; The current buffer is this group's buffer.
235 ((and nndoc-current-buffer
236 (eq nndoc-current-buffer
237 (setq buf (cdr (assoc group nndoc-group-alist))))))
238 ;; We change buffers by taking an old from the group alist.
239 ;; `source' is either a string (a file name) or a buffer object.
241 (setq nndoc-current-buffer buf))
242 ;; It's a totally new group.
243 ((or (and (bufferp nndoc-address)
244 (buffer-name nndoc-address))
245 (and (stringp nndoc-address)
246 (file-exists-p nndoc-address)
247 (not (file-directory-p nndoc-address))))
248 (setq nndoc-group-alist
249 (cons (cons group (setq nndoc-current-buffer
251 (concat " *nndoc " group "*"))))
254 (set-buffer nndoc-current-buffer)
255 (buffer-disable-undo (current-buffer))
257 (if (stringp nndoc-address)
258 (insert-file-contents nndoc-address)
260 (set-buffer nndoc-address)
262 (insert-buffer-substring nndoc-address))
265 (defun nndoc-forward-article (n)
267 (re-search-forward nndoc-article-begin nil t)
268 (or (not nndoc-head-begin)
269 (re-search-forward nndoc-head-begin nil t))
270 (re-search-forward nndoc-head-end nil t))
274 (defun nndoc-number-of-articles ()
276 (set-buffer nndoc-current-buffer)
278 (goto-char (point-min))
280 (if (re-search-forward (or nndoc-first-article
281 nndoc-article-begin) nil t)
284 (while (and (re-search-forward nndoc-article-begin nil t)
285 (or (not nndoc-end-of-file)
286 (not (looking-at nndoc-end-of-file)))
287 (or (not nndoc-head-begin)
288 (re-search-forward nndoc-head-begin nil t))
289 (re-search-forward nndoc-head-end nil t))
290 (setq num (1+ num)))))
293 (defun nndoc-narrow-to-article (article)
295 (set-buffer nndoc-current-buffer)
297 (goto-char (point-min))
298 (while (and (re-search-forward nndoc-article-begin nil t)
299 (not (zerop (setq article (1- article))))))
300 (if (not (zerop article))
304 (or (and (re-search-forward nndoc-article-end nil t)
311 ;;; nndoc.el ends here