code.delx.au - gnu-emacs/blob - lisp/gnus/nnslashdot.el

   1 ;;; nnslashdot.el --- interfacing with Slashdot
   2 ;; Copyright (C) 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
   3
   4 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
   5 ;; Keywords: news
   6
   7 ;; This file is part of GNU Emacs.
   8
   9 ;; GNU Emacs is free software; you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published by
  11 ;; the Free Software Foundation; either version 2, or (at your option)
  12 ;; any later version.
  13
  14 ;; GNU Emacs is distributed in the hope that it will be useful,
  15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;; GNU General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22 ;; Boston, MA 02111-1307, USA.
  23
  24 ;;; Commentary:
  25
  26 ;;; Code:
  27
  28 (eval-when-compile (require 'cl))
  29
  30 (require 'nnoo)
  31 (require 'message)
  32 (require 'gnus-util)
  33 (require 'gnus)
  34 (require 'nnmail)
  35 (require 'mm-util)
  36 (require 'mm-url)
  37
  38 (nnoo-declare nnslashdot)
  39
  40 (defvoo nnslashdot-directory (nnheader-concat gnus-directory "slashdot/")
  41   "Where nnslashdot will save its files.")
  42
  43 (defvoo nnslashdot-active-url "http://slashdot.org/search.pl?section=&min=%d"
  44   "Where nnslashdot will fetch the active file from.")
  45
  46 (defvoo nnslashdot-comments-url "http://slashdot.org/comments.pl?sid=%s&threshold=%d&commentsort=%d&mode=flat&startat=%d"
  47   "Where nnslashdot will fetch comments from.")
  48
  49 (defvoo nnslashdot-article-url
  50     "http://slashdot.org/article.pl?sid=%s&mode=nocomment"
  51   "Where nnslashdot will fetch the article from.")
  52
  53 (defvoo nnslashdot-backslash-url "http://slashdot.org/slashdot.xml"
  54   "Where nnslashdot will fetch the stories from.")
  55
  56 (defvoo nnslashdot-use-front-page nil
  57   "Use the front page in addition to the backslash page.")
  58
  59 (defvoo nnslashdot-threshold -1
  60   "The article threshold.")
  61
  62 (defvoo nnslashdot-threaded t
  63   "Whether the nnslashdot groups should be threaded or not.")
  64
  65 (defvoo nnslashdot-group-number 0
  66   "The number of non-fresh groups to keep updated.")
  67
  68 (defvoo nnslashdot-login-name ""
  69   "The login name to use when posting.")
  70
  71 (defvoo nnslashdot-password ""
  72   "The password to use when posting.")
  73
  74 ;;; Internal variables
  75
  76 (defvar nnslashdot-groups nil)
  77 (defvar nnslashdot-buffer nil)
  78 (defvar nnslashdot-headers nil)
  79
  80 ;;; Interface functions
  81
  82 (nnoo-define-basics nnslashdot)
  83
  84 (deffoo nnslashdot-retrieve-headers (articles &optional group server fetch-old)
  85   (nnslashdot-possibly-change-server group server)
  86   (condition-case why
  87       (unless gnus-nov-is-evil
  88         (nnslashdot-retrieve-headers-1 articles group))
  89     (search-failed (nnslashdot-lose why))))
  90
  91 (deffoo nnslashdot-retrieve-headers-1 (articles group)
  92   (let* ((last (car (last articles)))
  93          (start (if nnslashdot-threaded 1 (pop articles)))
  94          (entry (assoc group nnslashdot-groups))
  95          (sid (nth 2 entry))
  96          (first-comments t)
  97          headers article subject score from date lines parent point cid
  98          s startats changed)
  99     (save-excursion
 100       (set-buffer nnslashdot-buffer)
 101       (let ((case-fold-search t))
 102         (erase-buffer)
 103         (when (= start 1)
 104           (mm-url-insert (format nnslashdot-article-url sid) t)
 105           (goto-char (point-min))
 106           (if (eobp)
 107               (error "Couldn't open connection to slashdot"))
 108           (re-search-forward "Posted by[ \t\r\n]+")
 109           (when (looking-at "\\(<a[^>]+>\\)?[ \t\r\n]*\\([^<\r\n]+\\)")
 110             (setq from (mm-url-decode-entities-string (match-string 2))))
 111           (search-forward "on ")
 112           (setq date (nnslashdot-date-to-date
 113                       (buffer-substring (point) (1- (search-forward "<")))))
 114           (setq lines (/ (- (point)
 115                             (progn (forward-line 1) (point)))
 116                          60))
 117           (push
 118            (cons
 119             1
 120             (make-full-mail-header
 121              1 group from date
 122              (concat "<" sid "%1@slashdot>")
 123              "" 0 lines nil nil))
 124            headers)
 125           (setq start (if nnslashdot-threaded 2 (pop articles))))
 126         (while (and start (<= start last))
 127           (setq point (goto-char (point-max)))
 128           (mm-url-insert
 129            (format nnslashdot-comments-url sid
 130                    nnslashdot-threshold 0 (- start 2))
 131            t)
 132           (when (and nnslashdot-threaded first-comments)
 133             (setq first-comments nil)
 134             (goto-char (point-max))
 135             (while (re-search-backward "startat=\\([0-9]+\\)" nil t)
 136               (setq s (string-to-number (match-string 1)))
 137               (unless (memq s startats)
 138                 (push s startats)))
 139             (setq startats (sort startats '<)))
 140           (setq article (if (and article (< start article)) article start))
 141           (goto-char point)
 142           (while (re-search-forward
 143                   "<a name=\"\\([0-9]+\\)\"><\\(b\\|H4\\)>\\([^<]+\\)</\\(b\\|H4\\)>.*score:\\([^)]+\\))"
 144                   nil t)
 145             (setq cid (match-string 1)
 146                   subject (match-string 3)
 147                   score (match-string 5))
 148             (unless (assq article (nth 4 entry))
 149               (setcar (nthcdr 4 entry) (cons (cons article cid) (nth 4 entry)))
 150               (setq changed t))
 151             (when (string-match "^Re: *" subject)
 152               (setq subject (concat "Re: " (substring subject (match-end 0)))))
 153             (setq subject (mm-url-decode-entities-string subject))
 154             (search-forward "<BR>")
 155             (cond
 156              ((looking-at
 157                "by[ \t\n]+<a[^>]+>\\([^<]+\\)</a>[ \t\n]*(\\(<[^>]+>\\)*\\([^<>)]+\\))")
 158               (goto-char (- (match-end 0) 5))
 159               (setq from (concat
 160                           (mm-url-decode-entities-string (match-string 1))
 161                           " <" (match-string 3) ">")))
 162              ((looking-at "by[ \t\n]+<a[^>]+>\\([^<(]+\\) (\\([0-9]+\\))</a>")
 163               (goto-char (- (match-end 0) 5))
 164               (setq from (concat
 165                           (mm-url-decode-entities-string (match-string 1))
 166                           " <" (match-string 2) ">")))
 167              ((looking-at "by \\([^<>]*\\)[\t\n\r ]+on ")
 168               (goto-char (- (match-end 0) 5))
 169               (setq from (mm-url-decode-entities-string (match-string 1))))
 170              (t
 171               (setq from "")))
 172             (search-forward "on ")
 173             (setq date
 174                   (nnslashdot-date-to-date
 175                    (buffer-substring (point) (progn (skip-chars-forward "^()<>\n\r") (point)))))
 176             (setq lines (/ (abs (- (search-forward "<td")
 177                                    (search-forward "</td>")))
 178                            70))
 179             (if (not
 180                  (re-search-forward ".*cid=\\([0-9]+\\)\">Parent</A>" nil t))
 181                 (setq parent nil)
 182               (setq parent (match-string 1))
 183               (when (string= parent "0")
 184                 (setq parent nil)))
 185             (push
 186              (cons
 187               article
 188               (make-full-mail-header
 189                article
 190                (concat subject " (" score ")")
 191                from date
 192                (concat "<" sid "%" cid "@slashdot>")
 193                (if parent
 194                    (concat "<" sid "%" parent "@slashdot>")
 195                  "")
 196                0 lines nil nil))
 197              headers)
 198             (while (and articles (<= (car articles) article))
 199               (pop articles))
 200             (setq article (1+ article)))
 201           (if nnslashdot-threaded
 202               (progn
 203                 (setq start (pop startats))
 204                 (if start (setq start (+ start 2))))
 205             (setq start (pop articles))))))
 206     (if changed (nnslashdot-write-groups))
 207     (setq nnslashdot-headers (sort headers 'car-less-than-car))
 208     (save-excursion
 209       (set-buffer nntp-server-buffer)
 210       (erase-buffer)
 211       (mm-with-unibyte-current-buffer
 212        (dolist (header nnslashdot-headers)
 213          (nnheader-insert-nov (cdr header)))))
 214     'nov))
 215
 216 (deffoo nnslashdot-request-group (group &optional server dont-check)
 217   (nnslashdot-possibly-change-server nil server)
 218   (let ((elem (assoc group nnslashdot-groups)))
 219     (cond
 220      ((not elem)
 221       (nnheader-report 'nnslashdot "Group does not exist"))
 222      (t
 223       (nnheader-report 'nnslashdot "Opened group %s" group)
 224       (nnheader-insert
 225        "211 %d %d %d %s\n" (cadr elem) 1 (cadr elem)
 226        (prin1-to-string group))))))
 227
 228 (deffoo nnslashdot-close-group (group &optional server)
 229   (nnslashdot-possibly-change-server group server)
 230   (when (gnus-buffer-live-p nnslashdot-buffer)
 231     (save-excursion
 232       (set-buffer nnslashdot-buffer)
 233       (kill-buffer nnslashdot-buffer)))
 234   t)
 235
 236 (deffoo nnslashdot-request-article (article &optional group server buffer)
 237   (nnslashdot-possibly-change-server group server)
 238   (let (contents cid)
 239     (condition-case why
 240         (save-excursion
 241           (set-buffer nnslashdot-buffer)
 242           (let ((case-fold-search t))
 243             (goto-char (point-min))
 244             (when (and (stringp article)
 245                        (string-match "%\\([0-9]+\\)@" article))
 246               (setq cid (match-string 1 article))
 247               (let ((map (nth 4 (assoc group nnslashdot-groups))))
 248                 (while map
 249                   (if (equal (cdar map) cid)
 250                       (setq article (caar map)
 251                             map nil)
 252                     (setq map (cdr map))))))
 253             (when (numberp article)
 254               (if (= article 1)
 255                   (progn
 256                     (re-search-forward
 257                      "Posted by")
 258                     (search-forward "<BR>")
 259                     (setq contents
 260                           (buffer-substring
 261                            (point)
 262                            (progn
 263                              (re-search-forward
 264                               "<IFRAME\\|<SCRIPT LANGUAGE=\"JAVASCRIPT\">\\|<!-- no ad 6 -->\\|&lt;&nbsp;[ \t\r\n]*<A HREF=\"\\(\\(http:\\)?//slashdot\\.org\\)?/article")
 265                              (match-beginning 0)))))
 266                 (setq cid (cdr (assq article
 267                                      (nth 4 (assoc group nnslashdot-groups)))))
 268                 (search-forward (format "<a name=\"%s\">" cid))
 269                 (setq contents
 270                       (buffer-substring
 271                        (re-search-forward "<td[^>]*>")
 272                        (search-forward "</td>")))))))
 273       (search-failed (nnslashdot-lose why)))
 274
 275     (when contents
 276       (save-excursion
 277         (set-buffer (or buffer nntp-server-buffer))
 278         (erase-buffer)
 279         (mm-with-unibyte-current-buffer
 280           (insert contents)
 281           (goto-char (point-min))
 282           (while (re-search-forward "\\(<br>\r?\\)+" nil t)
 283             (replace-match "<p>" t t))
 284           (goto-char (point-min))
 285           (insert "Content-Type: text/html\nMIME-Version: 1.0\n")
 286           (insert "Newsgroups: " (caddr (assoc group nnslashdot-groups))
 287                   "\n")
 288           (let ((header (cdr (assq article nnslashdot-headers))))
 289             (nnheader-insert-header header))
 290           (nnheader-report 'nnslashdot "Fetched article %s" article))
 291         (cons group article)))))
 292
 293 (deffoo nnslashdot-close-server (&optional server)
 294   (when (and (nnslashdot-server-opened server)
 295              (gnus-buffer-live-p nnslashdot-buffer))
 296     (save-excursion
 297       (set-buffer nnslashdot-buffer)
 298       (kill-buffer nnslashdot-buffer)))
 299   (nnoo-close-server 'nnslashdot server))
 300
 301 (deffoo nnslashdot-request-list (&optional server)
 302   (nnslashdot-possibly-change-server nil server)
 303   (let ((number 0)
 304         (first nnslashdot-use-front-page)
 305         sid elem description articles gname)
 306     (condition-case why
 307         ;; First we do the Ultramode to get info on all the latest groups.
 308         (progn
 309           (mm-with-unibyte-buffer
 310             (mm-url-insert nnslashdot-backslash-url t)
 311             (goto-char (point-min))
 312             (if (eobp)
 313                 (error "Couldn't open connection to slashdot"))
 314             (while (search-forward "<story>" nil t)
 315               (narrow-to-region (point) (search-forward "</story>"))
 316               (goto-char (point-min))
 317               (re-search-forward "<title>\\([^<]+\\)</title>")
 318               (setq description
 319                     (mm-url-decode-entities-string (match-string 1)))
 320               (re-search-forward "<url>\\([^<]+\\)</url>")
 321               (setq sid (match-string 1))
 322               (string-match "sid=\\([0-9/]+\\)\\(.shtml\\|$\\)" sid)
 323               (setq sid (match-string 1 sid))
 324               (re-search-forward "<comments>\\([^<]+\\)</comments>")
 325               (setq articles (string-to-number (match-string 1)))
 326               (setq gname (concat description " (" sid ")"))
 327               (if (setq elem (assoc gname nnslashdot-groups))
 328                   (setcar (cdr elem) articles)
 329                 (push (list gname articles sid (current-time) nil)
 330                       nnslashdot-groups))
 331               (goto-char (point-max))
 332               (widen)))
 333           ;; Then do the older groups.
 334           (while (or first
 335                      (> (- nnslashdot-group-number number) 0))
 336             (setq first nil)
 337             (mm-with-unibyte-buffer
 338               (let ((case-fold-search t))
 339                 (mm-url-insert (format nnslashdot-active-url number) t)
 340                 (goto-char (point-min))
 341                 (while (re-search-forward
 342                         "article.pl\\?sid=\\([^&]+\\).*>\\([^<]+\\)</a>"
 343                         nil t)
 344                   (setq sid (match-string 1)
 345                         description
 346                         (mm-url-decode-entities-string (match-string 2)))
 347                   (forward-line 1)
 348                   (when (re-search-forward "with \\([0-9]+\\) comment" nil t)
 349                     (setq articles (1+ (string-to-number (match-string 1)))))
 350                   (setq gname (concat description " (" sid ")"))
 351                   (if (setq elem (assoc gname nnslashdot-groups))
 352                       (setcar (cdr elem) articles)
 353                     (push (list gname articles sid (current-time) nil)
 354                           nnslashdot-groups)))))
 355             (incf number 30)))
 356       (search-failed (nnslashdot-lose why)))
 357     (nnslashdot-write-groups)
 358     (nnslashdot-generate-active)
 359     t))
 360
 361 (deffoo nnslashdot-request-newgroups (date &optional server)
 362   (nnslashdot-possibly-change-server nil server)
 363   (nnslashdot-generate-active)
 364   t)
 365
 366 (deffoo nnslashdot-request-post (&optional server)
 367   (nnslashdot-possibly-change-server nil server)
 368   (let ((sid (message-fetch-field "newsgroups"))
 369         (subject (message-fetch-field "subject"))
 370         (references (car (last (split-string
 371                                 (message-fetch-field "references")))))
 372         body quoted pid)
 373     (string-match "%\\([0-9]+\\)@slashdot" references)
 374     (setq pid (match-string 1 references))
 375     (message-goto-body)
 376     (narrow-to-region (point) (progn (message-goto-signature) (point)))
 377     (goto-char (point-min))
 378     (while (not (eobp))
 379       (if (looking-at "> ")
 380           (progn
 381             (delete-region (point) (+ (point) 2))
 382             (unless quoted
 383               (insert "<blockquote>\n"))
 384             (setq quoted t))
 385         (when quoted
 386           (insert "</blockquote>\n")
 387           (setq quoted nil)))
 388       (forward-line 1))
 389     (goto-char (point-min))
 390     (while (re-search-forward "^ *\n" nil t)
 391       (replace-match "<p>\n"))
 392     (widen)
 393     (when (message-goto-signature)
 394       (forward-line -1)
 395       (insert "<p>\n")
 396       (while (not (eobp))
 397         (end-of-line)
 398         (insert "<br>")
 399         (forward-line 1)))
 400     (message-goto-body)
 401     (setq body (buffer-substring (point) (point-max)))
 402     (erase-buffer)
 403     (mm-url-fetch-form
 404      "http://slashdot.org/comments.pl"
 405      `(("sid" . ,sid)
 406        ("pid" . ,pid)
 407        ("rlogin" . "userlogin")
 408        ("unickname" . ,nnslashdot-login-name)
 409        ("upasswd" . ,nnslashdot-password)
 410        ("postersubj" . ,subject)
 411        ("op" . "Submit")
 412        ("postercomment" . ,body)
 413        ("posttype" . "html")))))
 414
 415 (deffoo nnslashdot-request-delete-group (group &optional force server)
 416   (nnslashdot-possibly-change-server group server)
 417   (setq nnslashdot-groups (delq (assoc group nnslashdot-groups)
 418                                 nnslashdot-groups))
 419   (nnslashdot-write-groups))
 420
 421 (deffoo nnslashdot-request-close ()
 422   (setq nnslashdot-headers nil
 423         nnslashdot-groups nil))
 424
 425 (deffoo nnslashdot-request-expire-articles
 426     (articles group &optional server force)
 427   (nnslashdot-possibly-change-server group server)
 428   (let ((item (assoc group nnslashdot-groups)))
 429     (when item
 430       (if (fourth item)
 431           (when (and (>= (length articles) (cadr item)) ;; All are expirable.
 432                      (nnmail-expired-article-p
 433                       group
 434                       (fourth item)
 435                       force))
 436             (setq nnslashdot-groups (delq item nnslashdot-groups))
 437             (nnslashdot-write-groups)
 438             (setq articles nil)) ;; all expired.
 439         (setcdr (cddr item) (list (current-time)))
 440         (nnslashdot-write-groups))))
 441   articles)
 442
 443 (nnoo-define-skeleton nnslashdot)
 444
 445 ;;; Internal functions
 446
 447 (defun nnslashdot-possibly-change-server (&optional group server)
 448   (nnslashdot-init server)
 449   (when (and server
 450              (not (nnslashdot-server-opened server)))
 451     (nnslashdot-open-server server))
 452   (unless nnslashdot-groups
 453     (nnslashdot-read-groups)))
 454
 455 (defun nnslashdot-make-tuple (tuple n)
 456   (prog1
 457       tuple
 458     (while (> n 1)
 459       (unless (cdr tuple)
 460         (setcdr tuple (list nil)))
 461       (setq tuple (cdr tuple)
 462             n (1- n)))))
 463
 464 (defun nnslashdot-read-groups ()
 465   (let ((file (expand-file-name "groups" nnslashdot-directory)))
 466     (when (file-exists-p file)
 467       (mm-with-unibyte-buffer
 468         (insert-file-contents file)
 469         (goto-char (point-min))
 470         (setq nnslashdot-groups (read (current-buffer))))
 471       (if (and nnslashdot-groups (< (length (car nnslashdot-groups)) 5))
 472           (let ((groups nnslashdot-groups))
 473             (while groups
 474               (nnslashdot-make-tuple (car groups) 5)
 475               (setq groups (cdr groups))))))))
 476
 477 (defun nnslashdot-write-groups ()
 478   (with-temp-file (expand-file-name "groups" nnslashdot-directory)
 479     (gnus-prin1 nnslashdot-groups)))
 480
 481 (defun nnslashdot-init (server)
 482   "Initialize buffers and such."
 483   (unless (file-exists-p nnslashdot-directory)
 484     (gnus-make-directory nnslashdot-directory))
 485   (unless (gnus-buffer-live-p nnslashdot-buffer)
 486     (setq nnslashdot-buffer
 487           (save-excursion
 488             (nnheader-set-temp-buffer
 489              (format " *nnslashdot %s*" server))))
 490     (push nnslashdot-buffer gnus-buffers)))
 491
 492 (defun nnslashdot-date-to-date (sdate)
 493   (condition-case err
 494       (let ((elem (delete "" (split-string sdate))))
 495         (concat (substring (nth 0 elem) 0 3) " "
 496                 (substring (nth 1 elem) 0 3) " "
 497                 (substring (nth 2 elem) 0 2) " "
 498                 (substring (nth 3 elem) 1 6) " "
 499                 (format-time-string "%Y") " "
 500                 (nth 4 elem)))
 501     (error "")))
 502
 503 (defun nnslashdot-generate-active ()
 504   (save-excursion
 505     (set-buffer nntp-server-buffer)
 506     (erase-buffer)
 507     (dolist (elem nnslashdot-groups)
 508       (when (numberp (cadr elem))
 509         (insert (prin1-to-string (car elem))
 510                 " " (number-to-string (cadr elem)) " 1 y\n")))))
 511
 512 (defun nnslashdot-lose (why)
 513   (error "Slashdot HTML has changed; please get a new version of nnslashdot"))
 514
 515 (provide 'nnslashdot)
 516
 517 ;;; arch-tag: aa73df7a-f7e6-4eef-bdea-5ce2f8c691b3
 518 ;;; nnslashdot.el ends here