nnslashdot.el 16.5 KB
Newer Older
Gerd Moellmann's avatar
Gerd Moellmann committed
1
;;; nnslashdot.el --- interfacing with Slashdot
2
;; Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
Gerd Moellmann's avatar
Gerd Moellmann committed
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59

;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Keywords: news

;; 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.

;;; Commentary:

;; Note: You need to have `url' and `w3' installed for this
;; backend to work.

;;; Code:

(eval-when-compile (require 'cl))

(require 'nnoo)
(require 'message)
(require 'gnus-util)
(require 'gnus)
(require 'nnmail)
(require 'mm-util)
(eval-when-compile
  (ignore-errors
    (require 'nnweb)))
;; Report failure to find w3 at load time if appropriate.
(eval '(require 'nnweb))

(nnoo-declare nnslashdot)

(defvoo nnslashdot-directory (nnheader-concat gnus-directory "slashdot/")
  "Where nnslashdot will save its files.")

(defvoo nnslashdot-active-url "http://slashdot.org/search.pl?section=&min=%d"
  "Where nnslashdot will fetch the active file from.")

(defvoo nnslashdot-comments-url "http://slashdot.org/comments.pl?sid=%s&threshold=%d&commentsort=%d&mode=flat&startat=%d"
  "Where nnslashdot will fetch comments from.")

(defvoo nnslashdot-article-url
    "http://slashdot.org/article.pl?sid=%s&mode=nocomment"
  "Where nnslashdot will fetch the article from.")

60 61 62
(defvoo nnslashdot-backslash-url "http://slashdot.org/slashdot.xml"
  "Where nnslashdot will fetch the stories from.")

Gerd Moellmann's avatar
Gerd Moellmann committed
63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91
(defvoo nnslashdot-threshold -1
  "The article threshold.")

(defvoo nnslashdot-threaded t
  "Whether the nnslashdot groups should be threaded or not.")

(defvoo nnslashdot-group-number 0
  "The number of non-fresh groups to keep updated.")

(defvoo nnslashdot-login-name ""
  "The login name to use when posting.")

(defvoo nnslashdot-password ""
  "The password to use when posting.")

;;; Internal variables

(defvar nnslashdot-groups nil)
(defvar nnslashdot-buffer nil)
(defvar nnslashdot-headers nil)

;;; Interface functions

(nnoo-define-basics nnslashdot)

(deffoo nnslashdot-retrieve-headers (articles &optional group server fetch-old)
  (nnslashdot-possibly-change-server group server)
  (condition-case why
      (unless gnus-nov-is-evil
92
	(nnslashdot-retrieve-headers-1 articles group))
Gerd Moellmann's avatar
Gerd Moellmann committed
93 94
    (search-failed (nnslashdot-lose why))))

95 96 97 98 99 100
(deffoo nnslashdot-retrieve-headers-1 (articles group)
  (let* ((last (car (last articles)))
	 (start (if nnslashdot-threaded 1 (pop articles)))
	 (entry (assoc group nnslashdot-groups))
	 (sid (nth 2 entry))
	 (first-comments t)
101
	 headers article subject score from date lines parent point cid
102
	 s startats changed)
Gerd Moellmann's avatar
Gerd Moellmann committed
103 104 105 106 107 108 109 110
    (save-excursion
      (set-buffer nnslashdot-buffer)
      (let ((case-fold-search t))
	(erase-buffer)
	(when (= start 1)
	  (nnweb-insert (format nnslashdot-article-url
				(nnslashdot-sid-strip sid)) t)
	  (goto-char (point-min))
111 112 113 114
	  (re-search-forward "Posted by[ \t\r\n]+")
	  (when (looking-at "\\(<a[^>]+>\\)?[ \t\r\n]*\\([^<\r\n]+\\)")
	    (setq from (nnweb-decode-entities-string (match-string 2))))
	  (search-forward "on ")
Gerd Moellmann's avatar
Gerd Moellmann committed
115 116 117 118 119 120 121 122 123 124 125 126
	  (setq date (nnslashdot-date-to-date
		      (buffer-substring (point) (1- (search-forward "<")))))
	  (setq lines (/ (- (point)
			    (progn (forward-line 1) (point)))
			 60))
	  (push
	   (cons
	    1
	    (make-full-mail-header
	     1 group from date
	     (concat "<" (nnslashdot-sid-strip sid) "%1@slashdot>")
	     "" 0 lines nil nil))
127 128 129
	   headers)
	  (setq start (if nnslashdot-threaded 2 (pop articles))))
	(while (and start (<= start last))
Gerd Moellmann's avatar
Gerd Moellmann committed
130 131 132 133
	  (setq point (goto-char (point-max)))
	  (nnweb-insert
	   (format nnslashdot-comments-url
		   (nnslashdot-sid-strip sid)
134
		   nnslashdot-threshold 0 (- start 2))
Gerd Moellmann's avatar
Gerd Moellmann committed
135
	   t)
136
	  (when (and nnslashdot-threaded first-comments)
Gerd Moellmann's avatar
Gerd Moellmann committed
137 138 139 140 141 142 143
	    (setq first-comments nil)
	    (goto-char (point-max))
	    (while (re-search-backward "startat=\\([0-9]+\\)" nil t)
	      (setq s (string-to-number (match-string 1)))
	      (unless (memq s startats)
		(push s startats)))
	    (setq startats (sort startats '<)))
144
	  (setq article (if (and article (< start article)) article start))
Gerd Moellmann's avatar
Gerd Moellmann committed
145 146 147 148
	  (goto-char point)
	  (while (re-search-forward
		  "<a name=\"\\([0-9]+\\)\"><\\(b\\|H4\\)>\\([^<]+\\)</\\(b\\|H4\\)>.*score:\\([^)]+\\))"
		  nil t)
149
	    (setq cid (match-string 1)
Gerd Moellmann's avatar
Gerd Moellmann committed
150 151
		  subject (match-string 3)
		  score (match-string 5))
152 153 154
	    (unless (assq article (nth 4 entry))
	      (setcar (nthcdr 4 entry) (cons (cons article cid) (nth 4 entry)))
	      (setq changed t))
Gerd Moellmann's avatar
Gerd Moellmann committed
155 156
	    (when (string-match "^Re: *" subject)
	      (setq subject (concat "Re: " (substring subject (match-end 0)))))
157 158
	    (setq subject (nnweb-decode-entities-string subject))
	    (search-forward "<BR>")
Gerd Moellmann's avatar
Gerd Moellmann committed
159
	    (if (looking-at
160
		 "by[ \t\n]+<a[^>]+>\\([^<]+\\)</a>[ \t\n]*(\\(<[^>]+>\\)*\\([^<>)]+\\))")
Gerd Moellmann's avatar
Gerd Moellmann committed
161 162
		(progn
		  (goto-char (- (match-end 0) 5))
163
		  (setq from (concat
Gerd Moellmann's avatar
Gerd Moellmann committed
164
			      (nnweb-decode-entities-string (match-string 1))
165
			      " <" (match-string 3) ">")))
Gerd Moellmann's avatar
Gerd Moellmann committed
166
	      (setq from "")
167
	      (when (looking-at "by \\([^<>]*\\) on ")
Gerd Moellmann's avatar
Gerd Moellmann committed
168 169 170 171 172
		(goto-char (- (match-end 0) 5))
		(setq from (nnweb-decode-entities-string (match-string 1)))))
	    (search-forward " on ")
	    (setq date
		  (nnslashdot-date-to-date
173 174
		   (buffer-substring (point) (progn (skip-chars-forward "^()<>\n\r") (point)))))
	    (setq lines (/ (abs (- (search-forward "<td")
Gerd Moellmann's avatar
Gerd Moellmann committed
175 176
				   (search-forward "</td>")))
			   70))
177 178 179 180 181 182
	    (if (not
		 (re-search-forward ".*cid=\\([0-9]+\\)\">Parent</A>" nil t))
		(setq parent nil)
	      (setq parent (match-string 1))
	      (when (string= parent "0")
		(setq parent nil)))
Gerd Moellmann's avatar
Gerd Moellmann committed
183 184
	    (push
	     (cons
185
	      article
Gerd Moellmann's avatar
Gerd Moellmann committed
186
	      (make-full-mail-header
187
	       article
Gerd Moellmann's avatar
Gerd Moellmann committed
188 189
	       (concat subject " (" score ")")
	       from date
190
	       (concat "<" (nnslashdot-sid-strip sid) "%" cid "@slashdot>")
Gerd Moellmann's avatar
Gerd Moellmann committed
191
	       (if parent
192
		   (concat "<" (nnslashdot-sid-strip sid) "%"
193
			   parent "@slashdot>")
Gerd Moellmann's avatar
Gerd Moellmann committed
194 195
		 "")
	       0 lines nil nil))
196 197 198 199
	     headers)
	    (while (and articles (<= (car articles) article))
	      (pop articles))
	    (setq article (1+ article)))
200
	  (if nnslashdot-threaded
201 202 203 204 205
	      (progn
		(setq start (pop startats))
		(if start (setq start (+ start 2))))
	    (setq start (pop articles))))))
    (if changed (nnslashdot-write-groups))
Gerd Moellmann's avatar
Gerd Moellmann committed
206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236
    (setq nnslashdot-headers (sort headers 'car-less-than-car))
    (save-excursion
      (set-buffer nntp-server-buffer)
      (erase-buffer)
      (mm-with-unibyte-current-buffer
       (dolist (header nnslashdot-headers)
	 (nnheader-insert-nov (cdr header)))))
    'nov))

(deffoo nnslashdot-request-group (group &optional server dont-check)
  (nnslashdot-possibly-change-server nil server)
  (let ((elem (assoc group nnslashdot-groups)))
    (cond
     ((not elem)
      (nnheader-report 'nnslashdot "Group does not exist"))
     (t
      (nnheader-report 'nnslashdot "Opened group %s" group)
      (nnheader-insert
       "211 %d %d %d %s\n" (cadr elem) 1 (cadr elem)
       (prin1-to-string group))))))

(deffoo nnslashdot-close-group (group &optional server)
  (nnslashdot-possibly-change-server group server)
  (when (gnus-buffer-live-p nnslashdot-buffer)
    (save-excursion
      (set-buffer nnslashdot-buffer)
      (kill-buffer nnslashdot-buffer)))
  t)

(deffoo nnslashdot-request-article (article &optional group server buffer)
  (nnslashdot-possibly-change-server group server)
237
  (let (contents cid)
Gerd Moellmann's avatar
Gerd Moellmann committed
238 239 240 241 242 243 244
    (condition-case why
	(save-excursion
	  (set-buffer nnslashdot-buffer)
	  (let ((case-fold-search t))
	    (goto-char (point-min))
	    (when (and (stringp article)
		       (string-match "%\\([0-9]+\\)@" article))
245 246 247 248 249 250 251
	      (setq cid (match-string 1 article))
	      (let ((map (nth 4 (assoc group nnslashdot-groups))))
		(while map
		  (if (equal (cdar map) cid)
		      (setq article (caar map)
			    map nil)
		    (setq map (cdr map))))))
Gerd Moellmann's avatar
Gerd Moellmann committed
252 253 254
	    (when (numberp article)
	      (if (= article 1)
		  (progn
255
		    (re-search-forward
256
		     "Posted by")
Gerd Moellmann's avatar
Gerd Moellmann committed
257 258 259 260 261 262
		    (search-forward "<BR>")
		    (setq contents
			  (buffer-substring
			   (point)
			   (progn
			     (re-search-forward
263
			      "&lt;&nbsp;[ \t\r\n]*<A HREF=\"\\(\\(http:\\)?//slashdot\\.org\\)?/article")
Gerd Moellmann's avatar
Gerd Moellmann committed
264
			     (match-beginning 0)))))
265
		(setq cid (cdr (assq article
266 267
				     (nth 4 (assoc group nnslashdot-groups)))))
		(search-forward (format "<a name=\"%s\">" cid))
Gerd Moellmann's avatar
Gerd Moellmann committed
268 269
		(setq contents
		      (buffer-substring
270
		       (re-search-forward "<td[^>]*>")
Gerd Moellmann's avatar
Gerd Moellmann committed
271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304
		       (search-forward "</td>")))))))
      (search-failed (nnslashdot-lose why)))

    (when contents
      (save-excursion
	(set-buffer (or buffer nntp-server-buffer))
	(erase-buffer)
	(mm-with-unibyte-current-buffer
	  (insert contents)
	  (goto-char (point-min))
	  (while (re-search-forward "\\(<br>\r?\\)+" nil t)
	    (replace-match "<p>" t t))
	  (goto-char (point-min))
	  (insert "Content-Type: text/html\nMIME-Version: 1.0\n")
	  (insert "Newsgroups: " (caddr (assoc group nnslashdot-groups))
		  "\n")
	  (let ((header (cdr (assq article nnslashdot-headers))))
	    (nnheader-insert-header header))
	  (nnheader-report 'nnslashdot "Fetched article %s" article))
	(cons group article)))))

(deffoo nnslashdot-close-server (&optional server)
  (when (and (nnslashdot-server-opened server)
	     (gnus-buffer-live-p nnslashdot-buffer))
    (save-excursion
      (set-buffer nnslashdot-buffer)
      (kill-buffer nnslashdot-buffer)))
  (nnoo-close-server 'nnslashdot server))

(deffoo nnslashdot-request-list (&optional server)
  (nnslashdot-possibly-change-server nil server)
  (let ((number 0)
	sid elem description articles gname)
    (condition-case why
305 306
	;; First we do the Ultramode to get info on all the latest groups.
	(progn
Gerd Moellmann's avatar
Gerd Moellmann committed
307
	  (mm-with-unibyte-buffer
308
	    (nnweb-insert nnslashdot-backslash-url t)
Gerd Moellmann's avatar
Gerd Moellmann committed
309 310 311 312 313 314 315 316 317
	    (goto-char (point-min))
	    (while (search-forward "<story>" nil t)
	      (narrow-to-region (point) (search-forward "</story>"))
	      (goto-char (point-min))
	      (re-search-forward "<title>\\([^<]+\\)</title>")
	      (setq description
		    (nnweb-decode-entities-string (match-string 1)))
	      (re-search-forward "<url>\\([^<]+\\)</url>")
	      (setq sid (match-string 1))
318 319
	      (string-match "sid=\\([0-9/]+\\)\\(.shtml\\|$\\)" sid)
	      (setq sid (match-string 1 sid))
Gerd Moellmann's avatar
Gerd Moellmann committed
320 321 322 323 324
	      (re-search-forward "<comments>\\([^<]+\\)</comments>")
	      (setq articles (string-to-number (match-string 1)))
	      (setq gname (concat description " (" sid ")"))
	      (if (setq elem (assoc gname nnslashdot-groups))
		  (setcar (cdr elem) articles)
325 326
		(push (list gname articles sid (current-time) nil)
		      nnslashdot-groups))
Gerd Moellmann's avatar
Gerd Moellmann committed
327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346
	      (goto-char (point-max))
	      (widen)))
	  ;; Then do the older groups.
	  (while (> (- nnslashdot-group-number number) 0)
	    (mm-with-unibyte-buffer
	      (let ((case-fold-search t))
		(nnweb-insert (format nnslashdot-active-url number) t)
		(goto-char (point-min))
		(while (re-search-forward
			"article.pl\\?sid=\\([^&]+\\).*<b>\\([^<]+\\)</b>"
			nil t)
		  (setq sid (match-string 1)
			description
			(nnweb-decode-entities-string (match-string 2)))
		  (forward-line 1)
		  (when (re-search-forward "<b>\\([0-9]+\\)</b>" nil t)
		    (setq articles (string-to-number (match-string 1))))
		  (setq gname (concat description " (" sid ")"))
		  (if (setq elem (assoc gname nnslashdot-groups))
		      (setcar (cdr elem) articles)
347 348
		    (push (list gname articles sid (current-time) nil)
			  nnslashdot-groups)))))
Gerd Moellmann's avatar
Gerd Moellmann committed
349 350 351 352 353
	    (incf number 30)))
      (search-failed (nnslashdot-lose why)))
    (nnslashdot-write-groups)
    (nnslashdot-generate-active)
    t))
354

Gerd Moellmann's avatar
Gerd Moellmann committed
355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418
(deffoo nnslashdot-request-newgroups (date &optional server)
  (nnslashdot-possibly-change-server nil server)
  (nnslashdot-generate-active)
  t)

(deffoo nnslashdot-request-post (&optional server)
  (nnslashdot-possibly-change-server nil server)
  (let ((sid (nnslashdot-sid-strip (message-fetch-field "newsgroups")))
	(subject (message-fetch-field "subject"))
	(references (car (last (split-string
				(message-fetch-field "references")))))
	body quoted pid)
    (string-match "%\\([0-9]+\\)@slashdot" references)
    (setq pid (match-string 1 references))
    (message-goto-body)
    (narrow-to-region (point) (progn (message-goto-signature) (point)))
    (goto-char (point-min))
    (while (not (eobp))
      (if (looking-at "> ")
	  (progn
	    (delete-region (point) (+ (point) 2))
	    (unless quoted
	      (insert "<blockquote>\n"))
	    (setq quoted t))
	(when quoted
	  (insert "</blockquote>\n")
	  (setq quoted nil)))
      (forward-line 1))
    (goto-char (point-min))
    (while (re-search-forward "^ *\n" nil t)
      (replace-match "<p>\n"))
    (widen)
    (when (message-goto-signature)
      (forward-line -1)
      (insert "<p>\n")
      (while (not (eobp))
	(end-of-line)
	(insert "<br>")
	(forward-line 1)))
    (message-goto-body)
    (setq body (buffer-substring (point) (point-max)))
    (erase-buffer)
    (nnweb-fetch-form
     "http://slashdot.org/comments.pl"
     `(("sid" . ,sid)
       ("pid" . ,pid)
       ("rlogin" . "userlogin")
       ("unickname" . ,nnslashdot-login-name)
       ("upasswd" . ,nnslashdot-password)
       ("postersubj" . ,subject)
       ("op" . "Submit")
       ("postercomment" . ,body)
       ("posttype" . "html")))))

(deffoo nnslashdot-request-delete-group (group &optional force server)
  (nnslashdot-possibly-change-server group server)
  (setq nnslashdot-groups (delq (assoc group nnslashdot-groups)
				nnslashdot-groups))
  (nnslashdot-write-groups))

(deffoo nnslashdot-request-close ()
  (setq nnslashdot-headers nil
	nnslashdot-groups nil))

419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436
(deffoo nnslashdot-request-expire-articles
    (articles group &optional server force)
  (nnslashdot-possibly-change-server group server)
  (let ((item (assoc group nnslashdot-groups)))
    (when item
      (if (fourth item)
	  (when (and (>= (length articles) (cadr item)) ;; All are expirable.
		     (nnmail-expired-article-p
		      group
		      (fourth item)
		      force))
	    (setq nnslashdot-groups (delq item nnslashdot-groups))
	    (nnslashdot-write-groups)
	    (setq articles nil)) ;; all expired.
	(setcdr (cddr item) (list (current-time)))
	(nnslashdot-write-groups))))
  articles)

Gerd Moellmann's avatar
Gerd Moellmann committed
437 438 439 440 441 442 443 444 445 446 447 448
(nnoo-define-skeleton nnslashdot)

;;; Internal functions

(defun nnslashdot-possibly-change-server (&optional group server)
  (nnslashdot-init server)
  (when (and server
	     (not (nnslashdot-server-opened server)))
    (nnslashdot-open-server server))
  (unless nnslashdot-groups
    (nnslashdot-read-groups)))

449 450 451 452 453 454 455 456 457
(defun nnslashdot-make-tuple (tuple n)
  (prog1
      tuple
    (while (> n 1)
      (unless (cdr tuple)
	(setcdr tuple (list nil)))
      (setq tuple (cdr tuple)
	    n (1- n)))))

Gerd Moellmann's avatar
Gerd Moellmann committed
458 459 460 461 462 463
(defun nnslashdot-read-groups ()
  (let ((file (expand-file-name "groups" nnslashdot-directory)))
    (when (file-exists-p file)
      (mm-with-unibyte-buffer
	(insert-file-contents file)
	(goto-char (point-min))
464 465 466 467 468 469
	(setq nnslashdot-groups (read (current-buffer))))
      (if (and nnslashdot-groups (< (length (car nnslashdot-groups)) 5))
	  (let ((groups nnslashdot-groups))
	    (while groups
	      (nnslashdot-make-tuple (car groups) 5)
	      (setq groups (cdr groups))))))))
Gerd Moellmann's avatar
Gerd Moellmann committed
470 471 472

(defun nnslashdot-write-groups ()
  (with-temp-file (expand-file-name "groups" nnslashdot-directory)
473 474
    (gnus-prin1 nnslashdot-groups)))

Gerd Moellmann's avatar
Gerd Moellmann committed
475 476 477 478 479 480 481 482
(defun nnslashdot-init (server)
  "Initialize buffers and such."
  (unless (file-exists-p nnslashdot-directory)
    (gnus-make-directory nnslashdot-directory))
  (unless (gnus-buffer-live-p nnslashdot-buffer)
    (setq nnslashdot-buffer
	  (save-excursion
	    (nnheader-set-temp-buffer
483 484
	     (format " *nnslashdot %s*" server))))
    (push nnslashdot-buffer gnus-buffers)))
Gerd Moellmann's avatar
Gerd Moellmann committed
485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512

(defun nnslashdot-date-to-date (sdate)
  (condition-case err
      (let ((elem (delete "" (split-string sdate))))
	(concat (substring (nth 0 elem) 0 3) " "
		(substring (nth 1 elem) 0 3) " "
		(substring (nth 2 elem) 0 2) " "
		(substring (nth 3 elem) 1 6) " "
		(format-time-string "%Y") " "
		(nth 4 elem)))
    (error "")))

(defun nnslashdot-generate-active ()
  (save-excursion
    (set-buffer nntp-server-buffer)
    (erase-buffer)
    (dolist (elem nnslashdot-groups)
      (insert (prin1-to-string (car elem))
	      " " (number-to-string (cadr elem)) " 1 y\n"))))

(defun nnslashdot-lose (why)
  (error "Slashdot HTML has changed; please get a new version of nnslashdot"))

(defalias 'nnslashdot-sid-strip 'identity)

(provide 'nnslashdot)

;;; nnslashdot.el ends here