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1 | ;;; nnspool.el --- spool access using NNTP for GNU Emacs |
2 | ||
05328297 | 3 | ;; Copyright (C) 1988, 1989 Fujitsu Laboratories LTD. |
4 | ;; Copyright (C) 1988, 1989, 1990 Masanobu UMEDA | |
5 | ;; $Header: nnspool.el,v 1.10 90/03/23 13:25:25 umerin Locked $ | |
6 | ||
7 | ;; This file is part of GNU Emacs. | |
8 | ||
9 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
10 | ;; but WITHOUT ANY WARRANTY. No author or distributor | |
11 | ;; accepts responsibility to anyone for the consequences of using it | |
12 | ;; or for whether it serves any particular purpose or works at all, | |
13 | ;; unless he says so in writing. Refer to the GNU Emacs General Public | |
14 | ;; License for full details. | |
15 | ||
16 | ;; Everyone is granted permission to copy, modify and redistribute | |
17 | ;; GNU Emacs, but only under the conditions described in the | |
18 | ;; GNU Emacs General Public License. A copy of this license is | |
19 | ;; supposed to have been given to you along with GNU Emacs so you | |
20 | ;; can know your rights and responsibilities. It should be in a | |
21 | ;; file named COPYING. Among other things, the copyright notice | |
22 | ;; and this notice must be preserved on all copies. | |
23 | ||
05328297 | 24 | (require 'nntp) |
25 | ||
26 | (defvar nnspool-inews-program news-inews-program | |
27 | "*Program to post news.") | |
28 | ||
29 | (defvar nnspool-inews-switches '("-h") | |
30 | "*Switches for nnspool-request-post to pass to `inews' for posting news.") | |
31 | ||
32 | (defvar nnspool-spool-directory news-path | |
33 | "*Local news spool directory.") | |
34 | ||
35 | (defvar nnspool-active-file "/usr/lib/news/active" | |
36 | "*Local news active file.") | |
37 | ||
38 | (defvar nnspool-history-file "/usr/lib/news/history" | |
39 | "*Local news history file.") | |
40 | ||
41 | \f | |
42 | ||
43 | (defconst nnspool-version "NNSPOOL 1.10" | |
44 | "Version numbers of this version of NNSPOOL.") | |
45 | ||
46 | (defvar nnspool-current-directory nil | |
47 | "Current news group directory.") | |
48 | ||
49 | ;;; | |
50 | ;;; Replacement of Extended Command for retrieving many headers. | |
51 | ;;; | |
52 | ||
53 | (defun nnspool-retrieve-headers (sequence) | |
54 | "Return list of article headers specified by SEQUENCE of article id. | |
55 | The format of list is | |
56 | `([NUMBER SUBJECT FROM XREF LINES DATE MESSAGE-ID REFERENCES] ...)'. | |
57 | Reader macros for the vector are defined as `nntp-header-FIELD'. | |
58 | Writer macros for the vector are defined as `nntp-set-header-FIELD'. | |
59 | News group must be selected before calling me." | |
60 | (save-excursion | |
61 | (set-buffer nntp-server-buffer) | |
62 | ;;(erase-buffer) | |
63 | (let ((file nil) | |
64 | (number (length sequence)) | |
65 | (count 0) | |
66 | (headers nil) ;Result list. | |
67 | (article 0) | |
68 | (subject nil) | |
69 | (message-id nil) | |
70 | (from nil) | |
71 | (xref nil) | |
72 | (lines 0) | |
73 | (date nil) | |
74 | (references nil)) | |
75 | (while sequence | |
76 | ;;(nntp-send-strings-to-server "HEAD" (car sequence)) | |
77 | (setq article (car sequence)) | |
78 | (setq file | |
79 | (concat nnspool-current-directory (prin1-to-string article))) | |
80 | (if (and (file-exists-p file) | |
81 | (not (file-directory-p file))) | |
82 | (progn | |
83 | (erase-buffer) | |
84 | (insert-file-contents file) | |
85 | ;; Make message body invisible. | |
86 | (goto-char (point-min)) | |
87 | (search-forward "\n\n" nil 'move) | |
88 | (narrow-to-region (point-min) (point)) | |
89 | ;; Fold continuation lines. | |
90 | (goto-char (point-min)) | |
91 | (while (re-search-forward "\\(\r?\n[ \t]+\\)+" nil t) | |
92 | (replace-match " " t t)) | |
93 | ;; Make it possible to search for `\nFIELD'. | |
94 | (goto-char (point-min)) | |
95 | (insert "\n") | |
96 | ;; Extract From: | |
97 | (goto-char (point-min)) | |
98 | (if (search-forward "\nFrom: " nil t) | |
99 | (setq from (buffer-substring | |
100 | (point) | |
101 | (save-excursion (end-of-line) (point)))) | |
102 | (setq from "(Unknown User)")) | |
103 | ;; Extract Subject: | |
104 | (goto-char (point-min)) | |
105 | (if (search-forward "\nSubject: " nil t) | |
106 | (setq subject (buffer-substring | |
107 | (point) | |
108 | (save-excursion (end-of-line) (point)))) | |
109 | (setq subject "(None)")) | |
110 | ;; Extract Message-ID: | |
111 | (goto-char (point-min)) | |
112 | (if (search-forward "\nMessage-ID: " nil t) | |
113 | (setq message-id (buffer-substring | |
114 | (point) | |
115 | (save-excursion (end-of-line) (point)))) | |
116 | (setq message-id nil)) | |
117 | ;; Extract Date: | |
118 | (goto-char (point-min)) | |
119 | (if (search-forward "\nDate: " nil t) | |
120 | (setq date (buffer-substring | |
121 | (point) | |
122 | (save-excursion (end-of-line) (point)))) | |
123 | (setq date nil)) | |
124 | ;; Extract Lines: | |
125 | (goto-char (point-min)) | |
126 | (if (search-forward "\nLines: " nil t) | |
127 | (setq lines (string-to-int | |
128 | (buffer-substring | |
129 | (point) | |
130 | (save-excursion (end-of-line) (point))))) | |
131 | (setq lines 0)) | |
132 | ;; Extract Xref: | |
133 | (goto-char (point-min)) | |
134 | (if (search-forward "\nXref: " nil t) | |
135 | (setq xref (buffer-substring | |
136 | (point) | |
137 | (save-excursion (end-of-line) (point)))) | |
138 | (setq xref nil)) | |
139 | ;; Extract References: | |
140 | (goto-char (point-min)) | |
141 | (if (search-forward "\nReferences: " nil t) | |
142 | (setq references (buffer-substring | |
143 | (point) | |
144 | (save-excursion (end-of-line) (point)))) | |
145 | (setq references nil)) | |
146 | (setq headers | |
147 | (cons (vector article subject from | |
148 | xref lines date | |
149 | message-id references) headers)) | |
150 | )) | |
151 | (setq sequence (cdr sequence)) | |
152 | (setq count (1+ count)) | |
153 | (and (numberp nntp-large-newsgroup) | |
154 | (> number nntp-large-newsgroup) | |
155 | (zerop (% count 20)) | |
156 | (message "NNSPOOL: %d%% of headers received." | |
157 | (/ (* count 100) number))) | |
158 | ) | |
159 | (and (numberp nntp-large-newsgroup) | |
160 | (> number nntp-large-newsgroup) | |
161 | (message "NNSPOOL: 100%% of headers received.")) | |
162 | (nreverse headers) | |
163 | ))) | |
164 | ||
165 | \f | |
166 | ;;; | |
167 | ;;; Replacement of NNTP Raw Interface. | |
168 | ;;; | |
169 | ||
170 | (defun nnspool-open-server (host &optional service) | |
171 | "Open news server on HOST. | |
172 | If HOST is nil, use value of environment variable `NNTPSERVER'. | |
173 | If optional argument SERVICE is non-nil, open by the service name." | |
174 | (let ((host (or host (getenv "NNTPSERVER"))) | |
175 | (status nil)) | |
176 | (setq nntp-status-message-string "") | |
177 | (cond ((and (file-directory-p nnspool-spool-directory) | |
178 | (file-exists-p nnspool-active-file) | |
179 | (string-equal host (system-name))) | |
180 | (setq status (nnspool-open-server-internal host service))) | |
181 | ((string-equal host (system-name)) | |
182 | (setq nntp-status-message-string | |
183 | (format "%s has no news spool. Goodbye." host))) | |
184 | ((null host) | |
185 | (setq nntp-status-message-string "NNTP server is not specified.")) | |
186 | (t | |
187 | (setq nntp-status-message-string | |
188 | (format "NNSPOOL: cannot talk to %s." host))) | |
189 | ) | |
190 | status | |
191 | )) | |
192 | ||
193 | (defun nnspool-close-server () | |
194 | "Close news server." | |
195 | (nnspool-close-server-internal)) | |
196 | ||
197 | (fset 'nnspool-request-quit (symbol-function 'nnspool-close-server)) | |
198 | ||
199 | (defun nnspool-server-opened () | |
200 | "Return server process status, T or NIL. | |
201 | If the stream is opened, return T, otherwise return NIL." | |
202 | (and nntp-server-buffer | |
203 | (get-buffer nntp-server-buffer))) | |
204 | ||
205 | (defun nnspool-status-message () | |
206 | "Return server status response as string." | |
207 | nntp-status-message-string | |
208 | ) | |
209 | ||
210 | (defun nnspool-request-article (id) | |
211 | "Select article by message ID (or number)." | |
212 | (let ((file (if (stringp id) | |
213 | (nnspool-find-article-by-message-id id) | |
214 | (concat nnspool-current-directory (prin1-to-string id))))) | |
215 | (if (and (stringp file) | |
216 | (file-exists-p file) | |
217 | (not (file-directory-p file))) | |
218 | (save-excursion | |
219 | (nnspool-find-file file))) | |
220 | )) | |
221 | ||
222 | (defun nnspool-request-body (id) | |
223 | "Select article body by message ID (or number)." | |
224 | (if (nnspool-request-article id) | |
225 | (save-excursion | |
226 | (set-buffer nntp-server-buffer) | |
227 | (goto-char (point-min)) | |
228 | (if (search-forward "\n\n" nil t) | |
229 | (delete-region (point-min) (point))) | |
230 | t | |
231 | ) | |
232 | )) | |
233 | ||
234 | (defun nnspool-request-head (id) | |
235 | "Select article head by message ID (or number)." | |
236 | (if (nnspool-request-article id) | |
237 | (save-excursion | |
238 | (set-buffer nntp-server-buffer) | |
239 | (goto-char (point-min)) | |
240 | (if (search-forward "\n\n" nil t) | |
241 | (delete-region (1- (point)) (point-max))) | |
242 | t | |
243 | ) | |
244 | )) | |
245 | ||
246 | (defun nnspool-request-stat (id) | |
247 | "Select article by message ID (or number)." | |
248 | (error "NNSPOOL: STAT is not implemented.")) | |
249 | ||
250 | (defun nnspool-request-group (group) | |
251 | "Select news GROUP." | |
252 | (let ((pathname (nnspool-article-pathname | |
253 | (nnspool-replace-chars-in-string group ?. ?/)))) | |
254 | (if (file-directory-p pathname) | |
255 | (setq nnspool-current-directory pathname)) | |
256 | )) | |
257 | ||
258 | (defun nnspool-request-list () | |
259 | "List valid newsgoups." | |
260 | (save-excursion | |
261 | (nnspool-find-file nnspool-active-file))) | |
262 | ||
263 | (defun nnspool-request-last () | |
a0963566 | 264 | "Set current article pointer to the previous article in the current news group." |
05328297 | 265 | (error "NNSPOOL: LAST is not implemented.")) |
266 | ||
267 | (defun nnspool-request-next () | |
268 | "Advance current article pointer." | |
269 | (error "NNSPOOL: NEXT is not implemented.")) | |
270 | ||
271 | (defun nnspool-request-post () | |
272 | "Post a new news in current buffer." | |
273 | (save-excursion | |
274 | ;; We have to work in the server buffer because of NEmacs hack. | |
275 | (copy-to-buffer nntp-server-buffer (point-min) (point-max)) | |
276 | (set-buffer nntp-server-buffer) | |
277 | (apply 'call-process-region | |
278 | (point-min) (point-max) | |
279 | nnspool-inews-program 'delete t nil nnspool-inews-switches) | |
280 | (prog1 | |
281 | (or (zerop (buffer-size)) | |
282 | ;; If inews returns strings, it must be error message | |
283 | ;; unless SPOOLNEWS is defined. | |
284 | ;; This condition is very weak, but there is no good rule | |
285 | ;; identifying errors when SPOOLNEWS is defined. | |
286 | ;; Suggested by ohm@kaba.junet. | |
287 | (string-match "spooled" (buffer-string))) | |
288 | ;; Make status message by unfolding lines. | |
289 | (subst-char-in-region (point-min) (point-max) ?\n ?\\ 'noundo) | |
290 | (setq nntp-status-message-string (buffer-string)) | |
291 | (erase-buffer)) | |
292 | )) | |
293 | ||
294 | \f | |
295 | ;;; | |
296 | ;;; Replacement of Low-Level Interface to NNTP Server. | |
297 | ;;; | |
298 | ||
299 | (defun nnspool-open-server-internal (host &optional service) | |
300 | "Open connection to news server on HOST by SERVICE (default is nntp)." | |
301 | (save-excursion | |
302 | (if (not (string-equal host (system-name))) | |
303 | (error "NNSPOOL: cannot talk to %s." host)) | |
304 | ;; Initialize communication buffer. | |
305 | (setq nntp-server-buffer (get-buffer-create " *nntpd*")) | |
306 | (set-buffer nntp-server-buffer) | |
307 | (buffer-flush-undo (current-buffer)) | |
308 | (erase-buffer) | |
309 | (kill-all-local-variables) | |
310 | (setq case-fold-search t) ;Should ignore case. | |
311 | (setq nntp-server-process nil) | |
312 | (setq nntp-server-name host) | |
313 | ;; It is possible to change kanji-fileio-code in this hook. | |
314 | (run-hooks 'nntp-server-hook) | |
315 | t | |
316 | )) | |
317 | ||
318 | (defun nnspool-close-server-internal () | |
319 | "Close connection to news server." | |
320 | (if (get-file-buffer nnspool-history-file) | |
321 | (kill-buffer (get-file-buffer nnspool-history-file))) | |
322 | (if nntp-server-buffer | |
323 | (kill-buffer nntp-server-buffer)) | |
324 | (setq nntp-server-buffer nil) | |
325 | (setq nntp-server-process nil)) | |
326 | ||
327 | (defun nnspool-find-article-by-message-id (id) | |
a0963566 | 328 | "Return full pathname of an article identified by message-ID." |
05328297 | 329 | (save-excursion |
330 | (let ((buffer (get-file-buffer nnspool-history-file))) | |
331 | (if buffer | |
332 | (set-buffer buffer) | |
333 | ;; Finding history file may take lots of time. | |
334 | (message "Reading history file...") | |
335 | (set-buffer (find-file-noselect nnspool-history-file)) | |
336 | (message "Reading history file... done"))) | |
337 | ;; Search from end of the file. I think this is much faster than | |
338 | ;; do from the beginning of the file. | |
339 | (goto-char (point-max)) | |
340 | (if (re-search-backward | |
341 | (concat "^" (regexp-quote id) | |
342 | "[ \t].*[ \t]\\([^ \t/]+\\)/\\([0-9]+\\)[ \t]*$") nil t) | |
343 | (let ((group (buffer-substring (match-beginning 1) (match-end 1))) | |
344 | (number (buffer-substring (match-beginning 2) (match-end 2)))) | |
345 | (concat (nnspool-article-pathname | |
346 | (nnspool-replace-chars-in-string group ?. ?/)) | |
347 | number)) | |
348 | ))) | |
349 | ||
350 | (defun nnspool-find-file (file) | |
351 | "Insert FILE in server buffer safely." | |
352 | (set-buffer nntp-server-buffer) | |
353 | (erase-buffer) | |
354 | (condition-case () | |
355 | (progn (insert-file-contents file) t) | |
356 | (file-error nil) | |
357 | )) | |
358 | ||
359 | (defun nnspool-article-pathname (group) | |
360 | "Make pathname for GROUP." | |
361 | (concat (file-name-as-directory nnspool-spool-directory) group "/")) | |
362 | ||
363 | (defun nnspool-replace-chars-in-string (string from to) | |
364 | "Replace characters in STRING from FROM to TO." | |
365 | (let ((string (substring string 0)) ;Copy string. | |
366 | (len (length string)) | |
367 | (idx 0)) | |
368 | ;; Replace all occurence of FROM with TO. | |
369 | (while (< idx len) | |
370 | (if (= (aref string idx) from) | |
371 | (aset string idx to)) | |
372 | (setq idx (1+ idx))) | |
373 | string | |
374 | )) | |
49116ac0 JB |
375 | |
376 | (provide 'nnspool) | |
6594deb0 ER |
377 | |
378 | ;;; nnspool.el ends here |