1;;; nnrss.el --- interfacing with RSS 2 3;; Copyright (C) 2001, 2002, 2003, 2004, 2005, 4;; 2006, 2007 Free Software Foundation, Inc. 5 6;; Author: Shenghuo Zhu <zsh@cs.rochester.edu> 7;; Keywords: RSS 8 9;; This file is part of GNU Emacs. 10 11;; GNU Emacs is free software; you can redistribute it and/or modify 12;; it under the terms of the GNU General Public License as published 13;; by the Free Software Foundation; either version 2, or (at your 14;; option) any later version. 15 16;; GNU Emacs is distributed in the hope that it will be useful, but 17;; WITHOUT ANY WARRANTY; without even the implied warranty of 18;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19;; General Public License for more details. 20 21;; You should have received a copy of the GNU General Public License 22;; along with GNU Emacs; see the file COPYING. If not, write to the 23;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 24;; Boston, MA 02110-1301, USA. 25 26;;; Commentary: 27 28;;; Code: 29 30(eval-when-compile (require 'cl)) 31 32(require 'gnus) 33(require 'nnoo) 34(require 'nnmail) 35(require 'message) 36(require 'mm-util) 37(require 'gnus-util) 38(require 'time-date) 39(require 'rfc2231) 40(require 'mm-url) 41(require 'rfc2047) 42(require 'mml) 43(eval-when-compile 44 (ignore-errors 45 (require 'xml))) 46(eval '(require 'xml)) 47 48(nnoo-declare nnrss) 49 50(defvoo nnrss-directory (nnheader-concat gnus-directory "rss/") 51 "Where nnrss will save its files.") 52 53;; (group max rss-url) 54(defvoo nnrss-server-data nil) 55 56;; (num timestamp url subject author date extra) 57(defvoo nnrss-group-data nil) 58(defvoo nnrss-group-max 0) 59(defvoo nnrss-group-min 1) 60(defvoo nnrss-group nil) 61(defvoo nnrss-group-hashtb nil) 62(defvoo nnrss-status-string "") 63 64(defconst nnrss-version "nnrss 1.0") 65 66(defvar nnrss-group-alist '() 67 "List of RSS addresses.") 68 69(defvar nnrss-use-local nil) 70 71(defvar nnrss-description-field 'X-Gnus-Description 72 "Field name used for DESCRIPTION. 73To use the description in headers, put this name into `nnmail-extra-headers'.") 74 75(defvar nnrss-url-field 'X-Gnus-Url 76 "Field name used for URL. 77To use the description in headers, put this name into `nnmail-extra-headers'.") 78 79(defvar nnrss-content-function nil 80 "A function which is called in `nnrss-request-article'. 81The arguments are (ENTRY GROUP ARTICLE). 82ENTRY is the record of the current headline. GROUP is the group name. 83ARTICLE is the article number of the current headline.") 84 85(defvar nnrss-file-coding-system mm-universal-coding-system 86 "Coding system used when reading and writing files.") 87 88(defvar nnrss-compatible-encoding-alist '((iso-8859-1 . windows-1252)) 89 "Alist of encodings and those supersets. 90The cdr of each element is used to decode data if it is available when 91the car is what the data specify as the encoding. Or, the car is used 92for decoding when the cdr that the data specify is not available.") 93 94(defvar nnrss-wash-html-in-text-plain-parts nil 95 "*Non-nil means render text in text/plain parts as HTML. 96The function specified by the `mm-text-html-renderer' variable will be 97used to render text. If it is nil, text will simply be folded.") 98 99(nnoo-define-basics nnrss) 100 101;;; Interface functions 102 103(defsubst nnrss-format-string (string) 104 (gnus-replace-in-string string " *\n *" " ")) 105 106(defun nnrss-decode-group-name (group) 107 (if (and group (mm-coding-system-p 'utf-8)) 108 (setq group (mm-decode-coding-string group 'utf-8)) 109 group)) 110 111(deffoo nnrss-retrieve-headers (articles &optional group server fetch-old) 112 (setq group (nnrss-decode-group-name group)) 113 (nnrss-possibly-change-group group server) 114 (let (e) 115 (save-excursion 116 (set-buffer nntp-server-buffer) 117 (erase-buffer) 118 (dolist (article articles) 119 (if (setq e (assq article nnrss-group-data)) 120 (insert (number-to-string (car e)) "\t" ;; number 121 ;; subject 122 (or (nth 3 e) "") 123 "\t" 124 ;; from 125 (or (nth 4 e) "(nobody)") 126 "\t" 127 ;; date 128 (or (nth 5 e) "") 129 "\t" 130 ;; id 131 (format "<%d@%s.nnrss>" (car e) group) 132 "\t" 133 ;; refs 134 "\t" 135 ;; chars 136 "-1" "\t" 137 ;; lines 138 "-1" "\t" 139 ;; Xref 140 "" "\t" 141 (if (and (nth 6 e) 142 (memq nnrss-description-field 143 nnmail-extra-headers)) 144 (concat (symbol-name nnrss-description-field) 145 ": " 146 (nnrss-format-string (nth 6 e)) 147 "\t") 148 "") 149 (if (and (nth 2 e) 150 (memq nnrss-url-field 151 nnmail-extra-headers)) 152 (concat (symbol-name nnrss-url-field) 153 ": " 154 (nnrss-format-string (nth 2 e)) 155 "\t") 156 "") 157 "\n"))))) 158 'nov) 159 160(deffoo nnrss-request-group (group &optional server dont-check) 161 (setq group (nnrss-decode-group-name group)) 162 (nnheader-message 6 "nnrss: Requesting %s..." group) 163 (nnrss-possibly-change-group group server) 164 (prog1 165 (if dont-check 166 t 167 (nnrss-check-group group server) 168 (nnheader-report 'nnrss "Opened group %s" group) 169 (nnheader-insert 170 "211 %d %d %d %s\n" nnrss-group-max nnrss-group-min nnrss-group-max 171 (prin1-to-string group) 172 t)) 173 (nnheader-message 6 "nnrss: Requesting %s...done" group))) 174 175(deffoo nnrss-close-group (group &optional server) 176 t) 177 178(eval-when-compile 179 (defvar mm-text-html-renderer) 180 (defvar mm-text-html-washer-alist)) 181 182(deffoo nnrss-request-article (article &optional group server buffer) 183 (setq group (nnrss-decode-group-name group)) 184 (when (stringp article) 185 (setq article (if (string-match "\\`<\\([0-9]+\\)@" article) 186 (string-to-number (match-string 1 article)) 187 0))) 188 (nnrss-possibly-change-group group server) 189 (let ((e (assq article nnrss-group-data)) 190 (nntp-server-buffer (or buffer nntp-server-buffer)) 191 post err) 192 (when e 193 (with-current-buffer nntp-server-buffer 194 (erase-buffer) 195 (if group 196 (insert "Newsgroups: " group "\n")) 197 (if (nth 3 e) 198 (insert "Subject: " (nth 3 e) "\n")) 199 (if (nth 4 e) 200 (insert "From: " (nth 4 e) "\n")) 201 (if (nth 5 e) 202 (insert "Date: " (nnrss-format-string (nth 5 e)) "\n")) 203 (let ((header (buffer-string)) 204 (text (nth 6 e)) 205 (link (nth 2 e)) 206 (enclosure (nth 7 e)) 207 (comments (nth 8 e)) 208 ;; Enable encoding of Newsgroups header in XEmacs. 209 (default-enable-multibyte-characters t) 210 (rfc2047-header-encoding-alist 211 (if (mm-coding-system-p 'utf-8) 212 (cons '("Newsgroups" . utf-8) 213 rfc2047-header-encoding-alist) 214 rfc2047-header-encoding-alist)) 215 rfc2047-encode-encoded-words body fn) 216 (when (or text link enclosure comments) 217 (insert "\n") 218 (insert "<#multipart type=alternative>\n" 219 "<#part type=\"text/plain\">\n") 220 (setq body (point)) 221 (when text 222 (insert text) 223 (goto-char body) 224 (if (and nnrss-wash-html-in-text-plain-parts 225 (progn 226 (require 'mm-view) 227 (setq fn (or (cdr (assq mm-text-html-renderer 228 mm-text-html-washer-alist)) 229 mm-text-html-renderer)))) 230 (progn 231 (narrow-to-region body (point-max)) 232 (if (functionp fn) 233 (funcall fn) 234 (apply (car fn) (cdr fn))) 235 (widen) 236 (goto-char body) 237 (re-search-forward "[^\t\n ]" nil t) 238 (beginning-of-line) 239 (delete-region body (point)) 240 (goto-char (point-max)) 241 (skip-chars-backward "\t\n ") 242 (end-of-line) 243 (delete-region (point) (point-max)) 244 (insert "\n")) 245 (while (re-search-forward "\n+" nil t) 246 (replace-match " ")) 247 (goto-char body) 248 ;; See `nnrss-check-group', which inserts "<br /><br />". 249 (when (search-forward "<br /><br />" nil t) 250 (if (eobp) 251 (replace-match "\n") 252 (replace-match "\n\n"))) 253 (unless (eobp) 254 (let ((fill-column default-fill-column) 255 (window (get-buffer-window nntp-server-buffer))) 256 (when window 257 (setq fill-column 258 (max 1 (/ (* (window-width window) 7) 8)))) 259 (fill-region (point) (point-max)) 260 (goto-char (point-max)) 261 ;; XEmacs version of `fill-region' inserts newline. 262 (unless (bolp) 263 (insert "\n"))))) 264 (when (or link enclosure) 265 (insert "\n"))) 266 (when link 267 (insert link "\n")) 268 (when enclosure 269 (insert (car enclosure) " " 270 (nth 2 enclosure) " " 271 (nth 3 enclosure) "\n")) 272 (when comments 273 (insert comments "\n")) 274 (setq body (buffer-substring body (point))) 275 (insert "<#/part>\n" 276 "<#part type=\"text/html\">\n" 277 "<html><head></head><body>\n") 278 (when text 279 (insert text "\n")) 280 (when link 281 (insert "<p><a href=\"" link "\">link</a></p>\n")) 282 (when enclosure 283 (insert "<p><a href=\"" (car enclosure) "\">" 284 (cadr enclosure) "</a> " (nth 2 enclosure) 285 " " (nth 3 enclosure) "</p>\n")) 286 (when comments 287 (insert "<p><a href=\"" comments "\">comments</a></p>\n")) 288 (insert "</body></html>\n" 289 "<#/part>\n" 290 "<#/multipart>\n")) 291 (condition-case nil 292 (mml-to-mime) 293 (error 294 (erase-buffer) 295 (insert header 296 "Content-Type: text/plain; charset=gnus-decoded\n" 297 "Content-Transfer-Encoding: 8bit\n\n" 298 body) 299 (nnheader-message 300 3 "Warning - there might be invalid characters")))) 301 (goto-char (point-min)) 302 (search-forward "\n\n") 303 (forward-line -1) 304 (insert (format "Message-ID: <%d@%s.nnrss>\n" 305 (car e) 306 (let ((rfc2047-encoding-type 'mime) 307 rfc2047-encode-max-chars) 308 (rfc2047-encode-string 309 (gnus-replace-in-string group "[\t\n ]+" "_"))))) 310 (when nnrss-content-function 311 (funcall nnrss-content-function e group article)))) 312 (cond 313 (err 314 (nnheader-report 'nnrss err)) 315 ((not e) 316 (nnheader-report 'nnrss "no such id: %d" article)) 317 (t 318 (nnheader-report 'nnrss "article %s retrieved" (car e)) 319 ;; we return the article number. 320 (cons nnrss-group (car e)))))) 321 322(deffoo nnrss-request-list (&optional server) 323 (nnrss-possibly-change-group nil server) 324 (nnrss-generate-active) 325 t) 326 327(deffoo nnrss-open-server (server &optional defs connectionless) 328 (nnrss-read-server-data server) 329 (nnoo-change-server 'nnrss server defs) 330 t) 331 332(deffoo nnrss-request-expire-articles 333 (articles group &optional server force) 334 (setq group (nnrss-decode-group-name group)) 335 (nnrss-possibly-change-group group server) 336 (let (e days not-expirable changed) 337 (dolist (art articles) 338 (if (and (setq e (assq art nnrss-group-data)) 339 (nnmail-expired-article-p 340 group 341 (if (listp (setq days (nth 1 e))) days 342 (days-to-time (- days (time-to-days '(0 0))))) 343 force)) 344 (setq nnrss-group-data (delq e nnrss-group-data) 345 changed t) 346 (push art not-expirable))) 347 (if changed 348 (nnrss-save-group-data group server)) 349 not-expirable)) 350 351(deffoo nnrss-request-delete-group (group &optional force server) 352 (setq group (nnrss-decode-group-name group)) 353 (nnrss-possibly-change-group group server) 354 (let (elem) 355 ;; There may be two or more entries in `nnrss-group-alist' since 356 ;; this function didn't delete them formerly. 357 (while (setq elem (assoc group nnrss-group-alist)) 358 (setq nnrss-group-alist (delq elem nnrss-group-alist)))) 359 (setq nnrss-server-data 360 (delq (assoc group nnrss-server-data) nnrss-server-data)) 361 (nnrss-save-server-data server) 362 (ignore-errors 363 (delete-file (nnrss-make-filename group server))) 364 t) 365 366(deffoo nnrss-request-list-newsgroups (&optional server) 367 (nnrss-possibly-change-group nil server) 368 (save-excursion 369 (set-buffer nntp-server-buffer) 370 (erase-buffer) 371 (dolist (elem nnrss-group-alist) 372 (if (third elem) 373 (insert (car elem) "\t" (third elem) "\n")))) 374 t) 375 376(nnoo-define-skeleton nnrss) 377 378;;; Internal functions 379(eval-when-compile (defun xml-rpc-method-call (&rest args))) 380 381(defun nnrss-get-encoding () 382 "Return an encoding attribute specified in the current xml contents. 383If `nnrss-compatible-encoding-alist' specifies the compatible encoding, 384it is used instead. If the xml contents doesn't specify the encoding, 385return `utf-8' which is the default encoding for xml if it is available, 386otherwise return nil." 387 (goto-char (point-min)) 388 (if (re-search-forward 389 "<\\?[^>]*encoding=\\(\"\\([^\">]+\\)\"\\|'\\([^'>]+\\)'\\)" 390 nil t) 391 (let ((encoding (intern (downcase (or (match-string 2) 392 (match-string 3)))))) 393 (or 394 (mm-coding-system-p (cdr (assq encoding 395 nnrss-compatible-encoding-alist))) 396 (mm-coding-system-p encoding) 397 (mm-coding-system-p (car (rassq encoding 398 nnrss-compatible-encoding-alist))))) 399 (mm-coding-system-p 'utf-8))) 400 401(defun nnrss-fetch (url &optional local) 402 "Fetch URL and put it in a the expected Lisp structure." 403 (mm-with-unibyte-buffer 404 ;;some CVS versions of url.el need this to close the connection quickly 405 (let (cs xmlform htmlform) 406 ;; bit o' work necessary for w3 pre-cvs and post-cvs 407 (if local 408 (let ((coding-system-for-read 'binary)) 409 (insert-file-contents url)) 410 ;; FIXME: shouldn't binding `coding-system-for-read' be moved 411 ;; to `mm-url-insert'? 412 (let ((coding-system-for-read 'binary)) 413 (condition-case err 414 (mm-url-insert url) 415 (error (if (or debug-on-quit debug-on-error) 416 (signal (car err) (cdr err)) 417 (message "nnrss: Failed to fetch %s" url)))))) 418 (nnheader-remove-cr-followed-by-lf) 419 ;; Decode text according to the encoding attribute. 420 (when (setq cs (nnrss-get-encoding)) 421 (insert (prog1 422 (mm-decode-coding-string (buffer-string) cs) 423 (erase-buffer) 424 (mm-enable-multibyte)))) 425 (goto-char (point-min)) 426 427 ;; Because xml-parse-region can't deal with anything that isn't 428 ;; xml and w3-parse-buffer can't deal with some xml, we have to 429 ;; parse with xml-parse-region first and, if that fails, parse 430 ;; with w3-parse-buffer. Yuck. Eventually, someone should find out 431 ;; why w3-parse-buffer fails to parse some well-formed xml and 432 ;; fix it. 433 434 (condition-case err1 435 (setq xmlform (xml-parse-region (point-min) (point-max))) 436 (error 437 (condition-case err2 438 (setq htmlform (caddar (w3-parse-buffer 439 (current-buffer)))) 440 (error 441 (message "\ 442nnrss: %s: Not valid XML %s and w3-parse doesn't work %s" 443 url err1 err2))))) 444 (if htmlform 445 htmlform 446 xmlform)))) 447 448(defun nnrss-possibly-change-group (&optional group server) 449 (when (and server 450 (not (nnrss-server-opened server))) 451 (nnrss-open-server server)) 452 (when (and group (not (equal group nnrss-group))) 453 (nnrss-read-group-data group server) 454 (setq nnrss-group group))) 455 456(defvar nnrss-extra-categories '(nnrss-snarf-moreover-categories)) 457 458(defun nnrss-generate-active () 459 (when (y-or-n-p "Fetch extra categories? ") 460 (dolist (func nnrss-extra-categories) 461 (funcall func))) 462 (save-excursion 463 (set-buffer nntp-server-buffer) 464 (erase-buffer) 465 (dolist (elem nnrss-group-alist) 466 (insert (prin1-to-string (car elem)) " 0 1 y\n")) 467 (dolist (elem nnrss-server-data) 468 (unless (assoc (car elem) nnrss-group-alist) 469 (insert (prin1-to-string (car elem)) " 0 1 y\n"))))) 470 471(eval-and-compile (autoload 'timezone-parse-date "timezone")) 472 473(defun nnrss-normalize-date (date) 474 "Return a date string of DATE in the RFC822 style. 475This function handles the ISO 8601 date format described in 476<URL:http://www.w3.org/TR/NOTE-datetime>, and also the RFC822 style 477which RSS 2.0 allows." 478 (let (case-fold-search vector year month day time zone cts) 479 (cond ((null date)) 480 ;; RFC822 481 ((string-match " [0-9]+ " date) 482 (setq vector (timezone-parse-date date) 483 year (string-to-number (aref vector 0))) 484 (when (>= year 1969) 485 (setq month (string-to-number (aref vector 1)) 486 day (string-to-number (aref vector 2))) 487 (unless (>= (length (setq time (aref vector 3))) 3) 488 (setq time "00:00:00")) 489 (when (and (setq zone (aref vector 4)) 490 (not (string-match "\\`[A-Z+-]" zone))) 491 (setq zone nil)))) 492 ;; ISO 8601 493 ((string-match 494 (eval-when-compile 495 (concat 496 ;; 1. year 497 "\\(199[0-9]\\|20[0-9][0-9]\\)" 498 "\\(-" 499 ;; 3. month 500 "\\([01][0-9]\\)" 501 "\\(-" 502 ;; 5. day 503 "\\([0-3][0-9]\\)" 504 "\\)?\\)?\\(T" 505 ;; 7. hh:mm 506 "\\([012][0-9]:[0-5][0-9]\\)" 507 "\\(" 508 ;; 9. :ss 509 "\\(:[0-5][0-9]\\)" 510 "\\(\\.[0-9]+\\)?\\)?\\)?" 511 ;; 13+14,15,16. zone 512 "\\(\\(\\([+-][012][0-9]\\):\\([0-5][0-9]\\)\\)" 513 "\\|\\([+-][012][0-9][0-5][0-9]\\)" 514 "\\|\\(Z\\)\\)?")) 515 date) 516 (setq year (string-to-number (match-string 1 date)) 517 month (string-to-number (or (match-string 3 date) "1")) 518 day (string-to-number (or (match-string 5 date) "1")) 519 time (if (match-beginning 9) 520 (substring date (match-beginning 7) (match-end 9)) 521 (concat (or (match-string 7 date) "00:00") ":00")) 522 zone (cond ((match-beginning 13) 523 (concat (match-string 13 date) 524 (match-string 14 date))) 525 ((match-beginning 16) ;; Z 526 "+0000") 527 (t ;; nil if zone is not provided. 528 (match-string 15 date)))))) 529 (if month 530 (progn 531 (setq cts (current-time-string (encode-time 0 0 0 day month year))) 532 (format "%s, %02d %s %04d %s%s" 533 (substring cts 0 3) day (substring cts 4 7) year time 534 (if zone 535 (concat " " zone) 536 ""))) 537 (message-make-date)))) 538 539;;; data functions 540 541(defun nnrss-read-server-data (server) 542 (setq nnrss-server-data nil) 543 (let ((file (nnrss-make-filename "nnrss" server))) 544 (when (file-exists-p file) 545 ;; In Emacs 21.3 and earlier, `load' doesn't support non-ASCII 546 ;; file names. So, we use `insert-file-contents' instead. 547 (mm-with-multibyte-buffer 548 (let ((coding-system-for-read nnrss-file-coding-system) 549 (file-name-coding-system nnmail-pathname-coding-system)) 550 (insert-file-contents file) 551 (eval-region (point-min) (point-max))))))) 552 553(defun nnrss-save-server-data (server) 554 (gnus-make-directory nnrss-directory) 555 (let ((coding-system-for-write nnrss-file-coding-system) 556 (file-name-coding-system nnmail-pathname-coding-system)) 557 (with-temp-file (nnrss-make-filename "nnrss" server) 558 (insert (format ";; -*- coding: %s; -*-\n" 559 nnrss-file-coding-system)) 560 (gnus-prin1 `(setq nnrss-group-alist ',nnrss-group-alist)) 561 (insert "\n") 562 (gnus-prin1 `(setq nnrss-server-data ',nnrss-server-data))))) 563 564(defun nnrss-read-group-data (group server) 565 (setq nnrss-group-data nil) 566 (setq nnrss-group-hashtb (gnus-make-hashtable)) 567 (let ((pair (assoc group nnrss-server-data))) 568 (setq nnrss-group-max (or (cadr pair) 0)) 569 (setq nnrss-group-min (+ nnrss-group-max 1))) 570 (let ((file (nnrss-make-filename group server))) 571 (when (file-exists-p file) 572 ;; In Emacs 21.3 and earlier, `load' doesn't support non-ASCII 573 ;; file names. So, we use `insert-file-contents' instead. 574 (mm-with-multibyte-buffer 575 (let ((coding-system-for-read nnrss-file-coding-system) 576 (file-name-coding-system nnmail-pathname-coding-system)) 577 (insert-file-contents file) 578 (eval-region (point-min) (point-max)))) 579 (dolist (e nnrss-group-data) 580 (gnus-sethash (or (nth 2 e) (nth 6 e)) t nnrss-group-hashtb) 581 (when (and (car e) (> nnrss-group-min (car e))) 582 (setq nnrss-group-min (car e))) 583 (when (and (car e) (< nnrss-group-max (car e))) 584 (setq nnrss-group-max (car e))))))) 585 586(defun nnrss-save-group-data (group server) 587 (gnus-make-directory nnrss-directory) 588 (let ((coding-system-for-write nnrss-file-coding-system) 589 (file-name-coding-system nnmail-pathname-coding-system)) 590 (with-temp-file (nnrss-make-filename group server) 591 (insert (format ";; -*- coding: %s; -*-\n" 592 nnrss-file-coding-system)) 593 (gnus-prin1 `(setq nnrss-group-data ',nnrss-group-data))))) 594 595(defun nnrss-make-filename (name server) 596 (expand-file-name 597 (nnrss-translate-file-chars 598 (concat name 599 (and server 600 (not (equal server "")) 601 "-") 602 server 603 ".el")) 604 nnrss-directory)) 605 606(gnus-add-shutdown 'nnrss-close 'gnus) 607 608(defun nnrss-close () 609 "Clear internal nnrss variables." 610 (setq nnrss-group-data nil 611 nnrss-server-data nil 612 nnrss-group-hashtb nil 613 nnrss-group-alist nil)) 614 615;;; URL interface 616 617(defun nnrss-no-cache (url) 618 "") 619 620(defun nnrss-insert-w3 (url) 621 (mm-with-unibyte-current-buffer 622 (condition-case err 623 (mm-url-insert url) 624 (error (if (or debug-on-quit debug-on-error) 625 (signal (car err) (cdr err)) 626 (message "nnrss: Failed to fetch %s" url)))))) 627 628(defun nnrss-decode-entities-string (string) 629 (if string 630 (mm-with-multibyte-buffer 631 (insert string) 632 (mm-url-decode-entities-nbsp) 633 (buffer-string)))) 634 635(defalias 'nnrss-insert 'nnrss-insert-w3) 636 637(defun nnrss-mime-encode-string (string) 638 (mm-with-multibyte-buffer 639 (insert string) 640 (mm-url-decode-entities-nbsp) 641 (goto-char (point-min)) 642 (while (re-search-forward "[\t\n ]+" nil t) 643 (replace-match " ")) 644 (goto-char (point-min)) 645 (skip-chars-forward " ") 646 (delete-region (point-min) (point)) 647 (goto-char (point-max)) 648 (skip-chars-forward " ") 649 (delete-region (point) (point-max)) 650 (let ((rfc2047-encoding-type 'mime) 651 rfc2047-encode-max-chars) 652 (rfc2047-encode-region (point-min) (point-max))) 653 (goto-char (point-min)) 654 (while (search-forward "\n" nil t) 655 (delete-backward-char 1)) 656 (buffer-string))) 657 658;;; Snarf functions 659 660(defun nnrss-check-group (group server) 661 (let (file xml subject url extra changed author date feed-subject 662 enclosure comments rss-ns rdf-ns content-ns dc-ns) 663 (if (and nnrss-use-local 664 (file-exists-p (setq file (expand-file-name 665 (nnrss-translate-file-chars 666 (concat group ".xml")) 667 nnrss-directory)))) 668 (setq xml (nnrss-fetch file t)) 669 (setq url (or (nth 2 (assoc group nnrss-server-data)) 670 (second (assoc group nnrss-group-alist)))) 671 (unless url 672 (setq url 673 (cdr 674 (assoc 'href 675 (nnrss-discover-feed 676 (read-string 677 (format "URL to search for %s: " group) "http://"))))) 678 (let ((pair (assoc group nnrss-server-data))) 679 (if pair 680 (setcdr (cdr pair) (list url)) 681 (push (list group nnrss-group-max url) nnrss-server-data))) 682 (setq changed t)) 683 (setq xml (nnrss-fetch url))) 684 ;; See 685 ;; http://feeds.archive.org/validator/docs/howto/declare_namespaces.html 686 ;; for more RSS namespaces. 687 (setq dc-ns (nnrss-get-namespace-prefix xml "http://purl.org/dc/elements/1.1/") 688 rdf-ns (nnrss-get-namespace-prefix xml "http://www.w3.org/1999/02/22-rdf-syntax-ns#") 689 rss-ns (nnrss-get-namespace-prefix xml "http://purl.org/rss/1.0/") 690 content-ns (nnrss-get-namespace-prefix xml "http://purl.org/rss/1.0/modules/content/")) 691 (dolist (item (nreverse (nnrss-find-el (intern (concat rss-ns "item")) xml))) 692 (when (and (listp item) 693 (string= (concat rss-ns "item") (car item)) 694 (if (setq url (nnrss-decode-entities-string 695 (nnrss-node-text rss-ns 'link (cddr item)))) 696 (not (gnus-gethash url nnrss-group-hashtb)) 697 (setq extra (or (nnrss-node-text content-ns 'encoded item) 698 (nnrss-node-text rss-ns 'description item))) 699 (not (gnus-gethash extra nnrss-group-hashtb)))) 700 (setq subject (nnrss-node-text rss-ns 'title item)) 701 (setq extra (or extra 702 (nnrss-node-text content-ns 'encoded item) 703 (nnrss-node-text rss-ns 'description item))) 704 (if (setq feed-subject (nnrss-node-text dc-ns 'subject item)) 705 (setq extra (concat feed-subject "<br /><br />" extra))) 706 (setq author (or (nnrss-node-text rss-ns 'author item) 707 (nnrss-node-text dc-ns 'creator item) 708 (nnrss-node-text dc-ns 'contributor item))) 709 (setq date (nnrss-normalize-date 710 (or (nnrss-node-text dc-ns 'date item) 711 (nnrss-node-text rss-ns 'pubDate item)))) 712 (setq comments (nnrss-node-text rss-ns 'comments item)) 713 (when (setq enclosure (cadr (assq (intern (concat rss-ns "enclosure")) item))) 714 (let ((url (cdr (assq 'url enclosure))) 715 (len (cdr (assq 'length enclosure))) 716 (type (cdr (assq 'type enclosure))) 717 (name)) 718 (setq len 719 (if (and len (integerp (setq len (string-to-number len)))) 720 ;; actually already in `ls-lisp-format-file-size' but 721 ;; probably not worth to require it for one function 722 (do ((size (/ len 1.0) (/ size 1024.0)) 723 (post-fixes (list "" "k" "M" "G" "T" "P" "E") 724 (cdr post-fixes))) 725 ((< size 1024) 726 (format "%.1f%s" size (car post-fixes)))) 727 "0")) 728 (setq url (or url "")) 729 (setq name (if (string-match "/\\([^/]*\\)$" url) 730 (match-string 1 url) 731 "file")) 732 (setq type (or type "")) 733 (setq enclosure (list url name len type)))) 734 (push 735 (list 736 (incf nnrss-group-max) 737 (current-time) 738 url 739 (and subject (nnrss-mime-encode-string subject)) 740 (and author (nnrss-mime-encode-string author)) 741 date 742 (and extra (nnrss-decode-entities-string extra)) 743 enclosure 744 comments) 745 nnrss-group-data) 746 (gnus-sethash (or url extra) t nnrss-group-hashtb) 747 (setq changed t)) 748 (setq extra nil)) 749 (when changed 750 (nnrss-save-group-data group server) 751 (let ((pair (assoc group nnrss-server-data))) 752 (if pair 753 (setcar (cdr pair) nnrss-group-max) 754 (push (list group nnrss-group-max) nnrss-server-data))) 755 (nnrss-save-server-data server)))) 756 757(defun nnrss-opml-import (opml-file) 758 "OPML subscriptions import. 759Read the file and attempt to subscribe to each Feed in the file." 760 (interactive "fImport file: ") 761 (mapc 762 (lambda (node) 763 (let ((xmlurl (cdr (assq 'xmlUrl (cadr node))))) 764 (when (and xmlurl 765 (not (string-match "\\`[\t ]*\\'" xmlurl)) 766 (prog1 767 (y-or-n-p (format "Subscribe to %s " xmlurl)) 768 (message ""))) 769 (condition-case err 770 (progn 771 (gnus-group-make-rss-group xmlurl) 772 (forward-line 1)) 773 (error 774 (message 775 "Failed to subscribe to %s (%s); type any key to continue: " 776 xmlurl 777 (error-message-string err)) 778 (let ((echo-keystrokes 0)) 779 (read-char))))))) 780 (nnrss-find-el 'outline 781 (mm-with-multibyte-buffer 782 (insert-file-contents opml-file) 783 (xml-parse-region (point-min) (point-max)))))) 784 785(defun nnrss-opml-export () 786 "OPML subscription export. 787Export subscriptions to a buffer in OPML Format." 788 (interactive) 789 (with-current-buffer (get-buffer-create "*OPML Export*") 790 (mm-set-buffer-file-coding-system 'utf-8) 791 (insert "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" 792 "<!-- OPML generated by Emacs Gnus' nnrss.el -->\n" 793 "<opml version=\"1.1\">\n" 794 " <head>\n" 795 " <title>mySubscriptions</title>\n" 796 " <dateCreated>" (format-time-string "%a, %d %b %Y %T %z") 797 "</dateCreated>\n" 798 " <ownerEmail>" user-mail-address "</ownerEmail>\n" 799 " <ownerName>" (user-full-name) "</ownerName>\n" 800 " </head>\n" 801 " <body>\n") 802 (dolist (sub nnrss-group-alist) 803 (insert " <outline text=\"" (car sub) 804 "\" xmlUrl=\"" (cadr sub) "\"/>\n")) 805 (insert " </body>\n" 806 "</opml>\n")) 807 (pop-to-buffer "*OPML Export*") 808 (when (fboundp 'sgml-mode) 809 (sgml-mode))) 810 811(defun nnrss-generate-download-script () 812 "Generate a download script in the current buffer. 813It is useful when `(setq nnrss-use-local t)'." 814 (interactive) 815 (insert "#!/bin/sh\n") 816 (insert "WGET=wget\n") 817 (insert "RSSDIR='" (expand-file-name nnrss-directory) "'\n") 818 (dolist (elem nnrss-server-data) 819 (let ((url (or (nth 2 elem) 820 (second (assoc (car elem) nnrss-group-alist))))) 821 (insert "$WGET -q -O \"$RSSDIR\"/'" 822 (nnrss-translate-file-chars (concat (car elem) ".xml")) 823 "' '" url "'\n")))) 824 825(defun nnrss-translate-file-chars (name) 826 (let ((nnheader-file-name-translation-alist 827 (append nnheader-file-name-translation-alist '((?' . ?_))))) 828 (nnheader-translate-file-chars name))) 829 830(defvar nnrss-moreover-url 831 "http://w.moreover.com/categories/category_list_rss.html" 832 "The url of moreover.com categories.") 833 834(defun nnrss-snarf-moreover-categories () 835 "Snarf RSS links from moreover.com." 836 (interactive) 837 (let (category name url changed) 838 (with-temp-buffer 839 (nnrss-insert nnrss-moreover-url) 840 (goto-char (point-min)) 841 (while (re-search-forward 842 "<a name=\"\\([^\"]+\\)\">\\|<a href=\"\\(http://[^\"]*moreover\\.com[^\"]+page\\?c=\\([^\"&]+\\)&o=rss\\)" nil t) 843 (if (match-string 1) 844 (setq category (match-string 1)) 845 (setq url (match-string 2) 846 name (mm-url-decode-entities-string 847 (rfc2231-decode-encoded-string 848 (match-string 3)))) 849 (if category 850 (setq name (concat category "." name))) 851 (unless (assoc name nnrss-server-data) 852 (setq changed t) 853 (push (list name 0 url) nnrss-server-data))))) 854 (if changed 855 (nnrss-save-server-data "")))) 856 857(defun nnrss-node-text (namespace local-name element) 858 (let* ((node (assq (intern (concat namespace (symbol-name local-name))) 859 element)) 860 (text (if (and node (listp node)) 861 (nnrss-node-just-text node) 862 node)) 863 (cleaned-text (if text 864 (gnus-replace-in-string 865 (gnus-replace-in-string 866 text "^[\000-\037\177]+\\|^ +\\| +$" "") 867 "\r\n" "\n")))) 868 (if (string-equal "" cleaned-text) 869 nil 870 cleaned-text))) 871 872(defun nnrss-node-just-text (node) 873 (if (and node (listp node)) 874 (mapconcat 'nnrss-node-just-text (cddr node) " ") 875 node)) 876 877(defun nnrss-find-el (tag data &optional found-list) 878 "Find the all matching elements in the data. 879Careful with this on large documents!" 880 (when (consp data) 881 (dolist (bit data) 882 (when (car-safe bit) 883 (when (equal tag (car bit)) 884 ;; Old xml.el may return a list of string. 885 (when (and (consp (caddr bit)) 886 (stringp (caaddr bit))) 887 (setcar (cddr bit) (caaddr bit))) 888 (setq found-list 889 (append found-list 890 (list bit)))) 891 (if (and (consp (car-safe (caddr bit))) 892 (not (stringp (caddr bit)))) 893 (setq found-list 894 (append found-list 895 (nnrss-find-el 896 tag (caddr bit)))) 897 (setq found-list 898 (append found-list 899 (nnrss-find-el 900 tag (cddr bit)))))))) 901 found-list) 902 903(defun nnrss-rsslink-p (el) 904 "Test if the element we are handed is an RSS autodiscovery link." 905 (and (eq (car-safe el) 'link) 906 (string-equal (cdr (assoc 'rel (cadr el))) "alternate") 907 (or (string-equal (cdr (assoc 'type (cadr el))) 908 "application/rss+xml") 909 (string-equal (cdr (assoc 'type (cadr el))) "text/xml")))) 910 911(defun nnrss-get-rsslinks (data) 912 "Extract the <link> elements that are links to RSS from the parsed data." 913 (delq nil (mapcar 914 (lambda (el) 915 (if (nnrss-rsslink-p el) el)) 916 (nnrss-find-el 'link data)))) 917 918(defun nnrss-extract-hrefs (data) 919 "Recursively extract hrefs from a page's source. 920DATA should be the output of `xml-parse-region' or 921`w3-parse-buffer'." 922 (mapcar (lambda (ahref) 923 (cdr (assoc 'href (cadr ahref)))) 924 (nnrss-find-el 'a data))) 925 926(defmacro nnrss-match-macro (base-uri item onsite-list offsite-list) 927 `(cond ((or (string-match (concat "^" ,base-uri) ,item) 928 (not (string-match "://" ,item))) 929 (setq ,onsite-list (append ,onsite-list (list ,item)))) 930 (t (setq ,offsite-list (append ,offsite-list (list ,item)))))) 931 932(defun nnrss-order-hrefs (base-uri hrefs) 933 "Given a list of hrefs, sort them using the following priorities: 934 1. links ending in .rss 935 2. links ending in .rdf 936 3. links ending in .xml 937 4. links containing the above 938 5. offsite links 939 940BASE-URI is used to determine the location of the links and 941whether they are `offsite' or `onsite'." 942 (let (rss-onsite-end rdf-onsite-end xml-onsite-end 943 rss-onsite-in rdf-onsite-in xml-onsite-in 944 rss-offsite-end rdf-offsite-end xml-offsite-end 945 rss-offsite-in rdf-offsite-in xml-offsite-in) 946 (dolist (href hrefs) 947 (cond ((null href)) 948 ((string-match "\\.rss$" href) 949 (nnrss-match-macro 950 base-uri href rss-onsite-end rss-offsite-end)) 951 ((string-match "\\.rdf$" href) 952 (nnrss-match-macro 953 base-uri href rdf-onsite-end rdf-offsite-end)) 954 ((string-match "\\.xml$" href) 955 (nnrss-match-macro 956 base-uri href xml-onsite-end xml-offsite-end)) 957 ((string-match "rss" href) 958 (nnrss-match-macro 959 base-uri href rss-onsite-in rss-offsite-in)) 960 ((string-match "rdf" href) 961 (nnrss-match-macro 962 base-uri href rdf-onsite-in rdf-offsite-in)) 963 ((string-match "xml" href) 964 (nnrss-match-macro 965 base-uri href xml-onsite-in xml-offsite-in)))) 966 (append 967 rss-onsite-end rdf-onsite-end xml-onsite-end 968 rss-onsite-in rdf-onsite-in xml-onsite-in 969 rss-offsite-end rdf-offsite-end xml-offsite-end 970 rss-offsite-in rdf-offsite-in xml-offsite-in))) 971 972(defun nnrss-discover-feed (url) 973 "Given a page, find an RSS feed using Mark Pilgrim's 974`ultra-liberal rss locator' (http://diveintomark.org/2002/08/15.html)." 975 976 (let ((parsed-page (nnrss-fetch url))) 977 978;; 1. if this url is the rss, use it. 979 (if (nnrss-rss-p parsed-page) 980 (let ((rss-ns (nnrss-get-namespace-prefix parsed-page "http://purl.org/rss/1.0/"))) 981 (nnrss-rss-title-description rss-ns parsed-page url)) 982 983;; 2. look for the <link rel="alternate" 984;; type="application/rss+xml" and use that if it is there. 985 (let ((links (nnrss-get-rsslinks parsed-page))) 986 (if links 987 (let* ((xml (nnrss-fetch 988 (cdr (assoc 'href (cadar links))))) 989 (rss-ns (nnrss-get-namespace-prefix xml "http://purl.org/rss/1.0/"))) 990 (nnrss-rss-title-description rss-ns xml (cdr (assoc 'href (cadar links))))) 991 992;; 3. look for links on the site in the following order: 993;; - onsite links ending in .rss, .rdf, or .xml 994;; - onsite links containing any of the above 995;; - offsite links ending in .rss, .rdf, or .xml 996;; - offsite links containing any of the above 997 (let* ((base-uri (progn (string-match ".*://[^/]+/?" url) 998 (match-string 0 url))) 999 (hrefs (nnrss-order-hrefs 1000 base-uri (nnrss-extract-hrefs parsed-page))) 1001 (rss-link nil)) 1002 (while (and (eq rss-link nil) (not (eq hrefs nil))) 1003 (let ((href-data (nnrss-fetch (car hrefs)))) 1004 (if (nnrss-rss-p href-data) 1005 (let* ((rss-ns (nnrss-get-namespace-prefix href-data "http://purl.org/rss/1.0/"))) 1006 (setq rss-link (nnrss-rss-title-description 1007 rss-ns href-data (car hrefs)))) 1008 (setq hrefs (cdr hrefs))))) 1009 (if rss-link rss-link 1010 1011;; 4. check syndic8 1012 (nnrss-find-rss-via-syndic8 url)))))))) 1013 1014(defun nnrss-find-rss-via-syndic8 (url) 1015 "Query syndic8 for the rss feeds it has for URL." 1016 (if (not (locate-library "xml-rpc")) 1017 (progn 1018 (message "XML-RPC is not available... not checking Syndic8.") 1019 nil) 1020 (require 'xml-rpc) 1021 (let ((feedid (xml-rpc-method-call 1022 "http://www.syndic8.com/xmlrpc.php" 1023 'syndic8.FindSites 1024 url))) 1025 (when feedid 1026 (let* ((feedinfo (xml-rpc-method-call 1027 "http://www.syndic8.com/xmlrpc.php" 1028 'syndic8.GetFeedInfo 1029 feedid)) 1030 (urllist 1031 (delq nil 1032 (mapcar 1033 (lambda (listinfo) 1034 (if (string-equal 1035 (cdr (assoc "status" listinfo)) 1036 "Syndicated") 1037 (cons 1038 (cdr (assoc "sitename" listinfo)) 1039 (list 1040 (cons 'title 1041 (cdr (assoc 1042 "sitename" listinfo))) 1043 (cons 'href 1044 (cdr (assoc 1045 "dataurl" listinfo))))))) 1046 feedinfo)))) 1047 (if (not (> (length urllist) 1)) 1048 (cdar urllist) 1049 (let ((completion-ignore-case t) 1050 (selection 1051 (mapcar (lambda (listinfo) 1052 (cons (cdr (assoc "sitename" listinfo)) 1053 (string-to-number 1054 (cdr (assoc "feedid" listinfo))))) 1055 feedinfo))) 1056 (cdr (assoc 1057 (completing-read 1058 "Multiple feeds found. Select one: " 1059 selection nil t) urllist))))))))) 1060 1061(defun nnrss-rss-p (data) 1062 "Test if DATA is an RSS feed. 1063Simply ensures that the first element is rss or rdf." 1064 (or (eq (caar data) 'rss) 1065 (eq (caar data) 'rdf:RDF))) 1066 1067(defun nnrss-rss-title-description (rss-namespace data url) 1068 "Return the title of an RSS feed." 1069 (if (nnrss-rss-p data) 1070 (let ((description (intern (concat rss-namespace "description"))) 1071 (title (intern (concat rss-namespace "title"))) 1072 (channel (nnrss-find-el (intern (concat rss-namespace "channel")) 1073 data))) 1074 (list 1075 (cons 'description (caddr (nth 0 (nnrss-find-el description channel)))) 1076 (cons 'title (caddr (nth 0 (nnrss-find-el title channel)))) 1077 (cons 'href url))))) 1078 1079(defun nnrss-get-namespace-prefix (el uri) 1080 "Given EL (containing a parsed element) and URI (containing a string 1081that gives the URI for which you want to retrieve the namespace 1082prefix), return the prefix." 1083 (let* ((prefix (car (rassoc uri (cadar el)))) 1084 (nslist (if prefix 1085 (split-string (symbol-name prefix) ":"))) 1086 (ns (cond ((eq (length nslist) 1) ; no prefix given 1087 "") 1088 ((eq (length nslist) 2) ; extract prefix 1089 (cadr nslist))))) 1090 (if (and ns (not (string= ns ""))) 1091 (concat ns ":") 1092 ns))) 1093 1094(provide 'nnrss) 1095 1096 1097;;; nnrss.el ends here 1098 1099;;; arch-tag: 12910c07-0cdf-44fb-8d2c-416ded64c267 1100