HCoop / bpt / emacs.git / blame
| Commit | Line | Data |
|---|---|---|
| 23f87bed | 1 | ;;; nnrss.el --- interfacing with RSS |
| e84b4b86 | 2 | |
| c4288669 | 3 | ;; Copyright (C) 2001, 2002, 2003, 2004, 2005, |
| e3fe4da0 | 4 | ;; 2006, 2007, 2008 Free Software Foundation, Inc. |
| 23f87bed MB |
5 | |
| 6 | ;; Author: Shenghuo Zhu <zsh@cs.rochester.edu> | |
| 7 | ;; Keywords: RSS | |
| 8 | ||
| 9 | ;; This file is part of GNU Emacs. | |
| 10 | ||
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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 by | |
| 13 | ;; the Free Software Foundation, either version 3 of the License, or | |
| 14 | ;; (at your option) any later version. | |
| 23f87bed | 15 | |
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16 | ;; GNU Emacs is distributed in the hope that it will be useful, |
| 17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 19 | ;; GNU General Public License for more details. | |
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20 | |
| 21 | ;; You should have received a copy of the GNU General Public License | |
| 5e809f55 | 22 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
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23 | |
| 24 | ;;; Commentary: | |
| 25 | ||
| 26 | ;;; Code: | |
| 27 | ||
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28 | ;; For Emacs < 22.2. |
| 29 | (eval-and-compile | |
| 30 | (unless (fboundp 'declare-function) (defmacro declare-function (&rest r)))) | |
| 31 | ||
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32 | (eval-when-compile (require 'cl)) |
| 33 | ||
| 34 | (require 'gnus) | |
| 35 | (require 'nnoo) | |
| 36 | (require 'nnmail) | |
| 37 | (require 'message) | |
| 38 | (require 'mm-util) | |
| 39 | (require 'gnus-util) | |
| 40 | (require 'time-date) | |
| 41 | (require 'rfc2231) | |
| 42 | (require 'mm-url) | |
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43 | (require 'rfc2047) |
| 44 | (require 'mml) | |
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45 | (eval-when-compile |
| 46 | (ignore-errors | |
| 91472578 | 47 | (require 'xml))) |
| 23f87bed MB |
48 | (eval '(require 'xml)) |
| 49 | ||
| 50 | (nnoo-declare nnrss) | |
| 51 | ||
| 52 | (defvoo nnrss-directory (nnheader-concat gnus-directory "rss/") | |
| 53 | "Where nnrss will save its files.") | |
| 54 | ||
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55 | (defvoo nnrss-ignore-article-fields '(slash:comments) |
| 56 | "*List of fields that should be ignored when comparing RSS articles. | |
| 57 | Some RSS feeds update article fields during their lives, e.g. to | |
| 58 | indicate the number of comments or the number of times the | |
| 59 | articles have been seen. However, if there is a difference | |
| 60 | between the local article and the distant one, the latter is | |
| 61 | considered to be new. To avoid this and discard some fields, set | |
| 62 | this variable to the list of fields to be ignored.") | |
| 63 | ||
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64 | ;; (group max rss-url) |
| 65 | (defvoo nnrss-server-data nil) | |
| 66 | ||
| 67 | ;; (num timestamp url subject author date extra) | |
| 68 | (defvoo nnrss-group-data nil) | |
| 69 | (defvoo nnrss-group-max 0) | |
| 70 | (defvoo nnrss-group-min 1) | |
| 71 | (defvoo nnrss-group nil) | |
| 01c52d31 | 72 | (defvoo nnrss-group-hashtb (make-hash-table :test 'equal)) |
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73 | (defvoo nnrss-status-string "") |
| 74 | ||
| 75 | (defconst nnrss-version "nnrss 1.0") | |
| 76 | ||
| 77 | (defvar nnrss-group-alist '() | |
| 78 | "List of RSS addresses.") | |
| 79 | ||
| 80 | (defvar nnrss-use-local nil) | |
| 81 | ||
| 82 | (defvar nnrss-description-field 'X-Gnus-Description | |
| 83 | "Field name used for DESCRIPTION. | |
| 84 | To use the description in headers, put this name into `nnmail-extra-headers'.") | |
| 85 | ||
| 86 | (defvar nnrss-url-field 'X-Gnus-Url | |
| 87 | "Field name used for URL. | |
| 88 | To use the description in headers, put this name into `nnmail-extra-headers'.") | |
| 89 | ||
| 90 | (defvar nnrss-content-function nil | |
| 91 | "A function which is called in `nnrss-request-article'. | |
| 92 | The arguments are (ENTRY GROUP ARTICLE). | |
| 91472578 | 93 | ENTRY is the record of the current headline. GROUP is the group name. |
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94 | ARTICLE is the article number of the current headline.") |
| 95 | ||
| 91472578 | 96 | (defvar nnrss-file-coding-system mm-universal-coding-system |
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97 | "*Coding system used when reading and writing files. |
| 98 | If you run Gnus with various versions of Emacsen, the value of this | |
| 99 | variable should be the coding system that all those Emacsen support. | |
| 100 | Note that you have to regenerate all the nnrss groups if you change | |
| 101 | the value. Moreover, you should be patient even if you are made to | |
| 102 | read the same articles twice, that arises for the difference of the | |
| 103 | versions of xml.el.") | |
| 91472578 | 104 | |
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105 | (defvar nnrss-compatible-encoding-alist |
| 106 | (delq nil (mapcar (lambda (elem) | |
| 107 | (if (and (mm-coding-system-p (car elem)) | |
| 108 | (mm-coding-system-p (cdr elem))) | |
| 109 | elem)) | |
| 110 | mm-charset-override-alist)) | |
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111 | "Alist of encodings and those supersets. |
| 112 | The cdr of each element is used to decode data if it is available when | |
| 7dafe00b | 113 | the car is what the data specify as the encoding. Or, the car is used |
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114 | for decoding when the cdr that the data specify is not available.") |
| 115 | ||
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116 | (defvar nnrss-wash-html-in-text-plain-parts nil |
| 117 | "*Non-nil means render text in text/plain parts as HTML. | |
| 118 | The function specified by the `mm-text-html-renderer' variable will be | |
| 119 | used to render text. If it is nil, text will simply be folded.") | |
| 120 | ||
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121 | (nnoo-define-basics nnrss) |
| 122 | ||
| 123 | ;;; Interface functions | |
| 124 | ||
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125 | (defsubst nnrss-format-string (string) |
| 126 | (gnus-replace-in-string string " *\n *" " ")) | |
| 127 | ||
| 128 | (defun nnrss-decode-group-name (group) | |
| 129 | (if (and group (mm-coding-system-p 'utf-8)) | |
| 130 | (setq group (mm-decode-coding-string group 'utf-8)) | |
| 131 | group)) | |
| ad136a7c | 132 | |
| 23f87bed | 133 | (deffoo nnrss-retrieve-headers (articles &optional group server fetch-old) |
| 91472578 | 134 | (setq group (nnrss-decode-group-name group)) |
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135 | (nnrss-possibly-change-group group server) |
| 136 | (let (e) | |
| 137 | (save-excursion | |
| 138 | (set-buffer nntp-server-buffer) | |
| 139 | (erase-buffer) | |
| 140 | (dolist (article articles) | |
| 141 | (if (setq e (assq article nnrss-group-data)) | |
| 142 | (insert (number-to-string (car e)) "\t" ;; number | |
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143 | ;; subject |
| 144 | (or (nth 3 e) "") | |
| 145 | "\t" | |
| 146 | ;; from | |
| 147 | (or (nth 4 e) "(nobody)") | |
| 148 | "\t" | |
| 149 | ;; date | |
| 23f87bed | 150 | (or (nth 5 e) "") |
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151 | "\t" |
| 152 | ;; id | |
| 23f87bed | 153 | (format "<%d@%s.nnrss>" (car e) group) |
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154 | "\t" |
| 155 | ;; refs | |
| 156 | "\t" | |
| 157 | ;; chars | |
| 158 | "-1" "\t" | |
| 159 | ;; lines | |
| 160 | "-1" "\t" | |
| 161 | ;; Xref | |
| 162 | "" "\t" | |
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163 | (if (and (nth 6 e) |
| 164 | (memq nnrss-description-field | |
| 165 | nnmail-extra-headers)) | |
| 166 | (concat (symbol-name nnrss-description-field) | |
| 167 | ": " | |
| 168 | (nnrss-format-string (nth 6 e)) | |
| 169 | "\t") | |
| 170 | "") | |
| 171 | (if (and (nth 2 e) | |
| 172 | (memq nnrss-url-field | |
| 173 | nnmail-extra-headers)) | |
| 174 | (concat (symbol-name nnrss-url-field) | |
| 175 | ": " | |
| 176 | (nnrss-format-string (nth 2 e)) | |
| 177 | "\t") | |
| 178 | "") | |
| 179 | "\n"))))) | |
| 180 | 'nov) | |
| 181 | ||
| 182 | (deffoo nnrss-request-group (group &optional server dont-check) | |
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183 | (setq group (nnrss-decode-group-name group)) |
| 184 | (nnheader-message 6 "nnrss: Requesting %s..." group) | |
| 23f87bed | 185 | (nnrss-possibly-change-group group server) |
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186 | (prog1 |
| 187 | (if dont-check | |
| 188 | t | |
| 189 | (nnrss-check-group group server) | |
| 190 | (nnheader-report 'nnrss "Opened group %s" group) | |
| 191 | (nnheader-insert | |
| 192 | "211 %d %d %d %s\n" nnrss-group-max nnrss-group-min nnrss-group-max | |
| 193 | (prin1-to-string group) | |
| 194 | t)) | |
| 195 | (nnheader-message 6 "nnrss: Requesting %s...done" group))) | |
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196 | |
| 197 | (deffoo nnrss-close-group (group &optional server) | |
| 198 | t) | |
| 199 | ||
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200 | (defvar mm-text-html-renderer) |
| 201 | (defvar mm-text-html-washer-alist) | |
| 7dafe00b | 202 | |
| 23f87bed | 203 | (deffoo nnrss-request-article (article &optional group server buffer) |
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204 | (setq group (nnrss-decode-group-name group)) |
| 205 | (when (stringp article) | |
| 206 | (setq article (if (string-match "\\`<\\([0-9]+\\)@" article) | |
| 207 | (string-to-number (match-string 1 article)) | |
| 208 | 0))) | |
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209 | (nnrss-possibly-change-group group server) |
| 210 | (let ((e (assq article nnrss-group-data)) | |
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211 | (nntp-server-buffer (or buffer nntp-server-buffer)) |
| 212 | post err) | |
| 213 | (when e | |
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214 | (with-current-buffer nntp-server-buffer |
| 215 | (erase-buffer) | |
| 216 | (if group | |
| 217 | (insert "Newsgroups: " group "\n")) | |
| 218 | (if (nth 3 e) | |
| 219 | (insert "Subject: " (nth 3 e) "\n")) | |
| 220 | (if (nth 4 e) | |
| 221 | (insert "From: " (nth 4 e) "\n")) | |
| 222 | (if (nth 5 e) | |
| 223 | (insert "Date: " (nnrss-format-string (nth 5 e)) "\n")) | |
| 224 | (let ((header (buffer-string)) | |
| 7dafe00b | 225 | (text (nth 6 e)) |
| 91472578 | 226 | (link (nth 2 e)) |
| 31640842 | 227 | (enclosure (nth 7 e)) |
| d3a597b7 | 228 | (comments (nth 8 e)) |
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229 | ;; Enable encoding of Newsgroups header in XEmacs. |
| 230 | (default-enable-multibyte-characters t) | |
| 231 | (rfc2047-header-encoding-alist | |
| 232 | (if (mm-coding-system-p 'utf-8) | |
| 233 | (cons '("Newsgroups" . utf-8) | |
| 234 | rfc2047-header-encoding-alist) | |
| 235 | rfc2047-header-encoding-alist)) | |
| 7dafe00b | 236 | rfc2047-encode-encoded-words body fn) |
| d3a597b7 | 237 | (when (or text link enclosure comments) |
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238 | (insert "\n") |
| 239 | (insert "<#multipart type=alternative>\n" | |
| 240 | "<#part type=\"text/plain\">\n") | |
| 241 | (setq body (point)) | |
| 31640842 | 242 | (when text |
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243 | (insert text) |
| 244 | (goto-char body) | |
| 245 | (if (and nnrss-wash-html-in-text-plain-parts | |
| 246 | (progn | |
| 247 | (require 'mm-view) | |
| 248 | (setq fn (or (cdr (assq mm-text-html-renderer | |
| 249 | mm-text-html-washer-alist)) | |
| 250 | mm-text-html-renderer)))) | |
| 251 | (progn | |
| 252 | (narrow-to-region body (point-max)) | |
| 253 | (if (functionp fn) | |
| 254 | (funcall fn) | |
| 255 | (apply (car fn) (cdr fn))) | |
| 256 | (widen) | |
| 257 | (goto-char body) | |
| 258 | (re-search-forward "[^\t\n ]" nil t) | |
| 259 | (beginning-of-line) | |
| 260 | (delete-region body (point)) | |
| 261 | (goto-char (point-max)) | |
| 262 | (skip-chars-backward "\t\n ") | |
| 263 | (end-of-line) | |
| 264 | (delete-region (point) (point-max)) | |
| 265 | (insert "\n")) | |
| 266 | (while (re-search-forward "\n+" nil t) | |
| 267 | (replace-match " ")) | |
| 268 | (goto-char body) | |
| 269 | ;; See `nnrss-check-group', which inserts "<br /><br />". | |
| 270 | (when (search-forward "<br /><br />" nil t) | |
| 271 | (if (eobp) | |
| 272 | (replace-match "\n") | |
| 273 | (replace-match "\n\n"))) | |
| 274 | (unless (eobp) | |
| 275 | (let ((fill-column default-fill-column) | |
| 276 | (window (get-buffer-window nntp-server-buffer))) | |
| 277 | (when window | |
| 278 | (setq fill-column | |
| 279 | (max 1 (/ (* (window-width window) 7) 8)))) | |
| 280 | (fill-region (point) (point-max)) | |
| 281 | (goto-char (point-max)) | |
| 282 | ;; XEmacs version of `fill-region' inserts newline. | |
| 283 | (unless (bolp) | |
| 284 | (insert "\n"))))) | |
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285 | (when (or link enclosure) |
| 286 | (insert "\n"))) | |
| 287 | (when link | |
| 288 | (insert link "\n")) | |
| 289 | (when enclosure | |
| 290 | (insert (car enclosure) " " | |
| 291 | (nth 2 enclosure) " " | |
| 292 | (nth 3 enclosure) "\n")) | |
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293 | (when comments |
| 294 | (insert comments "\n")) | |
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295 | (setq body (buffer-substring body (point))) |
| 296 | (insert "<#/part>\n" | |
| 297 | "<#part type=\"text/html\">\n" | |
| 298 | "<html><head></head><body>\n") | |
| 299 | (when text | |
| 300 | (insert text "\n")) | |
| 301 | (when link | |
| 302 | (insert "<p><a href=\"" link "\">link</a></p>\n")) | |
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303 | (when enclosure |
| 304 | (insert "<p><a href=\"" (car enclosure) "\">" | |
| 305 | (cadr enclosure) "</a> " (nth 2 enclosure) | |
| 306 | " " (nth 3 enclosure) "</p>\n")) | |
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307 | (when comments |
| 308 | (insert "<p><a href=\"" comments "\">comments</a></p>\n")) | |
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309 | (insert "</body></html>\n" |
| 310 | "<#/part>\n" | |
| 311 | "<#/multipart>\n")) | |
| 312 | (condition-case nil | |
| 313 | (mml-to-mime) | |
| 314 | (error | |
| 315 | (erase-buffer) | |
| 316 | (insert header | |
| 317 | "Content-Type: text/plain; charset=gnus-decoded\n" | |
| 318 | "Content-Transfer-Encoding: 8bit\n\n" | |
| 319 | body) | |
| 320 | (nnheader-message | |
| 321 | 3 "Warning - there might be invalid characters")))) | |
| 322 | (goto-char (point-min)) | |
| 323 | (search-forward "\n\n") | |
| 324 | (forward-line -1) | |
| 325 | (insert (format "Message-ID: <%d@%s.nnrss>\n" | |
| 326 | (car e) | |
| 327 | (let ((rfc2047-encoding-type 'mime) | |
| 328 | rfc2047-encode-max-chars) | |
| 329 | (rfc2047-encode-string | |
| 330 | (gnus-replace-in-string group "[\t\n ]+" "_"))))) | |
| 331 | (when nnrss-content-function | |
| 332 | (funcall nnrss-content-function e group article)))) | |
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333 | (cond |
| 334 | (err | |
| 335 | (nnheader-report 'nnrss err)) | |
| 336 | ((not e) | |
| 337 | (nnheader-report 'nnrss "no such id: %d" article)) | |
| 338 | (t | |
| 339 | (nnheader-report 'nnrss "article %s retrieved" (car e)) | |
| 340 | ;; we return the article number. | |
| 341 | (cons nnrss-group (car e)))))) | |
| 342 | ||
| 343 | (deffoo nnrss-request-list (&optional server) | |
| 344 | (nnrss-possibly-change-group nil server) | |
| 345 | (nnrss-generate-active) | |
| 346 | t) | |
| 347 | ||
| 348 | (deffoo nnrss-open-server (server &optional defs connectionless) | |
| 349 | (nnrss-read-server-data server) | |
| 350 | (nnoo-change-server 'nnrss server defs) | |
| 351 | t) | |
| 352 | ||
| 353 | (deffoo nnrss-request-expire-articles | |
| 354 | (articles group &optional server force) | |
| 91472578 | 355 | (setq group (nnrss-decode-group-name group)) |
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356 | (nnrss-possibly-change-group group server) |
| 357 | (let (e days not-expirable changed) | |
| 358 | (dolist (art articles) | |
| 359 | (if (and (setq e (assq art nnrss-group-data)) | |
| 360 | (nnmail-expired-article-p | |
| 361 | group | |
| 362 | (if (listp (setq days (nth 1 e))) days | |
| 363 | (days-to-time (- days (time-to-days '(0 0))))) | |
| 364 | force)) | |
| 365 | (setq nnrss-group-data (delq e nnrss-group-data) | |
| 366 | changed t) | |
| 367 | (push art not-expirable))) | |
| 368 | (if changed | |
| 369 | (nnrss-save-group-data group server)) | |
| 370 | not-expirable)) | |
| 371 | ||
| 372 | (deffoo nnrss-request-delete-group (group &optional force server) | |
| 91472578 | 373 | (setq group (nnrss-decode-group-name group)) |
| 23f87bed | 374 | (nnrss-possibly-change-group group server) |
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375 | (let (elem) |
| 376 | ;; There may be two or more entries in `nnrss-group-alist' since | |
| 377 | ;; this function didn't delete them formerly. | |
| 378 | (while (setq elem (assoc group nnrss-group-alist)) | |
| 379 | (setq nnrss-group-alist (delq elem nnrss-group-alist)))) | |
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380 | (setq nnrss-server-data |
| 381 | (delq (assoc group nnrss-server-data) nnrss-server-data)) | |
| 382 | (nnrss-save-server-data server) | |
| 91472578 | 383 | (ignore-errors |
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384 | (let ((file-name-coding-system nnmail-pathname-coding-system)) |
| 385 | (delete-file (nnrss-make-filename group server)))) | |
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386 | t) |
| 387 | ||
| 388 | (deffoo nnrss-request-list-newsgroups (&optional server) | |
| 389 | (nnrss-possibly-change-group nil server) | |
| 390 | (save-excursion | |
| 391 | (set-buffer nntp-server-buffer) | |
| 392 | (erase-buffer) | |
| 393 | (dolist (elem nnrss-group-alist) | |
| 394 | (if (third elem) | |
| 395 | (insert (car elem) "\t" (third elem) "\n")))) | |
| 396 | t) | |
| 397 | ||
| 398 | (nnoo-define-skeleton nnrss) | |
| 399 | ||
| 400 | ;;; Internal functions | |
| 401 | (eval-when-compile (defun xml-rpc-method-call (&rest args))) | |
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402 | |
| 403 | (defun nnrss-get-encoding () | |
| 404 | "Return an encoding attribute specified in the current xml contents. | |
| 405 | If `nnrss-compatible-encoding-alist' specifies the compatible encoding, | |
| 406 | it is used instead. If the xml contents doesn't specify the encoding, | |
| 407 | return `utf-8' which is the default encoding for xml if it is available, | |
| 408 | otherwise return nil." | |
| 409 | (goto-char (point-min)) | |
| 410 | (if (re-search-forward | |
| 01c52d31 | 411 | "<\\?[^>]*encoding=\\(?:\"\\([^\">]+\\)\"\\|'\\([^'>]+\\)'\\)" |
| 91472578 | 412 | nil t) |
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413 | (let ((encoding (intern (downcase (or (match-string 1) |
| 414 | (match-string 2)))))) | |
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415 | (or |
| 416 | (mm-coding-system-p (cdr (assq encoding | |
| 417 | nnrss-compatible-encoding-alist))) | |
| 418 | (mm-coding-system-p encoding) | |
| 419 | (mm-coding-system-p (car (rassq encoding | |
| 420 | nnrss-compatible-encoding-alist))))) | |
| 421 | (mm-coding-system-p 'utf-8))) | |
| 422 | ||
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423 | (declare-function w3-parse-buffer "ext:w3-parse" (&optional buff)) |
| 424 | ||
| 23f87bed | 425 | (defun nnrss-fetch (url &optional local) |
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426 | "Fetch URL and put it in a the expected Lisp structure." |
| 427 | (mm-with-unibyte-buffer | |
| 428 | ;;some CVS versions of url.el need this to close the connection quickly | |
| 429 | (let (cs xmlform htmlform) | |
| 23f87bed MB |
430 | ;; bit o' work necessary for w3 pre-cvs and post-cvs |
| 431 | (if local | |
| 432 | (let ((coding-system-for-read 'binary)) | |
| 433 | (insert-file-contents url)) | |
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434 | ;; FIXME: shouldn't binding `coding-system-for-read' be moved |
| 435 | ;; to `mm-url-insert'? | |
| 436 | (let ((coding-system-for-read 'binary)) | |
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437 | (condition-case err |
| 438 | (mm-url-insert url) | |
| 439 | (error (if (or debug-on-quit debug-on-error) | |
| 440 | (signal (car err) (cdr err)) | |
| 441 | (message "nnrss: Failed to fetch %s" url)))))) | |
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442 | (nnheader-remove-cr-followed-by-lf) |
| 443 | ;; Decode text according to the encoding attribute. | |
| 444 | (when (setq cs (nnrss-get-encoding)) | |
| 11e95b02 MB |
445 | (insert (prog1 |
| 446 | (mm-decode-coding-string (buffer-string) cs) | |
| 447 | (erase-buffer) | |
| 448 | (mm-enable-multibyte)))) | |
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449 | (goto-char (point-min)) |
| 450 | ||
| 451 | ;; Because xml-parse-region can't deal with anything that isn't | |
| 452 | ;; xml and w3-parse-buffer can't deal with some xml, we have to | |
| 453 | ;; parse with xml-parse-region first and, if that fails, parse | |
| 454 | ;; with w3-parse-buffer. Yuck. Eventually, someone should find out | |
| 455 | ;; why w3-parse-buffer fails to parse some well-formed xml and | |
| 456 | ;; fix it. | |
| 457 | ||
| 458 | (condition-case err1 | |
| 459 | (setq xmlform (xml-parse-region (point-min) (point-max))) | |
| 460 | (error | |
| 461 | (condition-case err2 | |
| 462 | (setq htmlform (caddar (w3-parse-buffer | |
| 463 | (current-buffer)))) | |
| 464 | (error | |
| 465 | (message "\ | |
| 466 | nnrss: %s: Not valid XML %s and w3-parse doesn't work %s" | |
| 467 | url err1 err2))))) | |
| 468 | (if htmlform | |
| 469 | htmlform | |
| 470 | xmlform)))) | |
| 23f87bed MB |
471 | |
| 472 | (defun nnrss-possibly-change-group (&optional group server) | |
| 473 | (when (and server | |
| 474 | (not (nnrss-server-opened server))) | |
| 475 | (nnrss-open-server server)) | |
| 476 | (when (and group (not (equal group nnrss-group))) | |
| 477 | (nnrss-read-group-data group server) | |
| 478 | (setq nnrss-group group))) | |
| 479 | ||
| 480 | (defvar nnrss-extra-categories '(nnrss-snarf-moreover-categories)) | |
| 481 | ||
| 482 | (defun nnrss-generate-active () | |
| 91472578 | 483 | (when (y-or-n-p "Fetch extra categories? ") |
| 01c52d31 | 484 | (mapc 'funcall nnrss-extra-categories)) |
| 23f87bed MB |
485 | (save-excursion |
| 486 | (set-buffer nntp-server-buffer) | |
| 487 | (erase-buffer) | |
| 488 | (dolist (elem nnrss-group-alist) | |
| 489 | (insert (prin1-to-string (car elem)) " 0 1 y\n")) | |
| 490 | (dolist (elem nnrss-server-data) | |
| 491 | (unless (assoc (car elem) nnrss-group-alist) | |
| 492 | (insert (prin1-to-string (car elem)) " 0 1 y\n"))))) | |
| 493 | ||
| 7dafe00b MB |
494 | (eval-and-compile (autoload 'timezone-parse-date "timezone")) |
| 495 | ||
| 496 | (defun nnrss-normalize-date (date) | |
| 497 | "Return a date string of DATE in the RFC822 style. | |
| 498 | This function handles the ISO 8601 date format described in | |
| 499 | <URL:http://www.w3.org/TR/NOTE-datetime>, and also the RFC822 style | |
| 500 | which RSS 2.0 allows." | |
| 501 | (let (case-fold-search vector year month day time zone cts) | |
| 502 | (cond ((null date)) | |
| 503 | ;; RFC822 | |
| 504 | ((string-match " [0-9]+ " date) | |
| 505 | (setq vector (timezone-parse-date date) | |
| 506 | year (string-to-number (aref vector 0))) | |
| 507 | (when (>= year 1969) | |
| 508 | (setq month (string-to-number (aref vector 1)) | |
| 509 | day (string-to-number (aref vector 2))) | |
| 510 | (unless (>= (length (setq time (aref vector 3))) 3) | |
| 511 | (setq time "00:00:00")) | |
| 512 | (when (and (setq zone (aref vector 4)) | |
| 513 | (not (string-match "\\`[A-Z+-]" zone))) | |
| 514 | (setq zone nil)))) | |
| 515 | ;; ISO 8601 | |
| 516 | ((string-match | |
| 517 | (eval-when-compile | |
| 518 | (concat | |
| 519 | ;; 1. year | |
| 520 | "\\(199[0-9]\\|20[0-9][0-9]\\)" | |
| 01c52d31 MB |
521 | "\\(?:-" |
| 522 | ;; 2. month | |
| 7dafe00b | 523 | "\\([01][0-9]\\)" |
| 01c52d31 MB |
524 | "\\(?:-" |
| 525 | ;; 3. day | |
| 7dafe00b | 526 | "\\([0-3][0-9]\\)" |
| 01c52d31 MB |
527 | "\\)?\\)?\\(?:T" |
| 528 | ;; 4. hh:mm | |
| 7dafe00b | 529 | "\\([012][0-9]:[0-5][0-9]\\)" |
| 01c52d31 MB |
530 | "\\(?:" |
| 531 | ;; 5. :ss | |
| 7dafe00b | 532 | "\\(:[0-5][0-9]\\)" |
| 01c52d31 MB |
533 | "\\(?:\\.[0-9]+\\)?\\)?\\)?" |
| 534 | ;; 6+7,8,9. zone | |
| 535 | "\\(?:\\(?:\\([+-][012][0-9]\\):\\([0-5][0-9]\\)\\)" | |
| 7dafe00b MB |
536 | "\\|\\([+-][012][0-9][0-5][0-9]\\)" |
| 537 | "\\|\\(Z\\)\\)?")) | |
| 538 | date) | |
| 539 | (setq year (string-to-number (match-string 1 date)) | |
| 01c52d31 MB |
540 | month (string-to-number (or (match-string 2 date) "1")) |
| 541 | day (string-to-number (or (match-string 3 date) "1")) | |
| 542 | time (if (match-beginning 5) | |
| 543 | (substring date (match-beginning 4) (match-end 5)) | |
| 544 | (concat (or (match-string 4 date) "00:00") ":00")) | |
| 545 | zone (cond ((match-beginning 6) | |
| 546 | (concat (match-string 6 date) | |
| 547 | (match-string 7 date))) | |
| 548 | ((match-beginning 9) ;; Z | |
| 7dafe00b MB |
549 | "+0000") |
| 550 | (t ;; nil if zone is not provided. | |
| 01c52d31 | 551 | (match-string 8 date)))))) |
| 7dafe00b MB |
552 | (if month |
| 553 | (progn | |
| 554 | (setq cts (current-time-string (encode-time 0 0 0 day month year))) | |
| 555 | (format "%s, %02d %s %04d %s%s" | |
| 556 | (substring cts 0 3) day (substring cts 4 7) year time | |
| 557 | (if zone | |
| 558 | (concat " " zone) | |
| 559 | ""))) | |
| 560 | (message-make-date)))) | |
| 561 | ||
| 23f87bed MB |
562 | ;;; data functions |
| 563 | ||
| 564 | (defun nnrss-read-server-data (server) | |
| 565 | (setq nnrss-server-data nil) | |
| 01c52d31 MB |
566 | (let ((file (nnrss-make-filename "nnrss" server)) |
| 567 | (file-name-coding-system nnmail-pathname-coding-system)) | |
| 23f87bed | 568 | (when (file-exists-p file) |
| 91472578 MB |
569 | ;; In Emacs 21.3 and earlier, `load' doesn't support non-ASCII |
| 570 | ;; file names. So, we use `insert-file-contents' instead. | |
| 571 | (mm-with-multibyte-buffer | |
| 01c52d31 | 572 | (let ((coding-system-for-read nnrss-file-coding-system)) |
| 23f87bed | 573 | (insert-file-contents file) |
| 91472578 | 574 | (eval-region (point-min) (point-max))))))) |
| 23f87bed MB |
575 | |
| 576 | (defun nnrss-save-server-data (server) | |
| 577 | (gnus-make-directory nnrss-directory) | |
| 91472578 MB |
578 | (let ((coding-system-for-write nnrss-file-coding-system) |
| 579 | (file-name-coding-system nnmail-pathname-coding-system)) | |
| 580 | (with-temp-file (nnrss-make-filename "nnrss" server) | |
| 581 | (insert (format ";; -*- coding: %s; -*-\n" | |
| 582 | nnrss-file-coding-system)) | |
| 583 | (gnus-prin1 `(setq nnrss-group-alist ',nnrss-group-alist)) | |
| 584 | (insert "\n") | |
| 585 | (gnus-prin1 `(setq nnrss-server-data ',nnrss-server-data))))) | |
| 23f87bed MB |
586 | |
| 587 | (defun nnrss-read-group-data (group server) | |
| 588 | (setq nnrss-group-data nil) | |
| 01c52d31 MB |
589 | (if (hash-table-p nnrss-group-hashtb) |
| 590 | (clrhash nnrss-group-hashtb) | |
| 591 | (setq nnrss-group-hashtb (make-hash-table :test 'equal))) | |
| 23f87bed MB |
592 | (let ((pair (assoc group nnrss-server-data))) |
| 593 | (setq nnrss-group-max (or (cadr pair) 0)) | |
| 594 | (setq nnrss-group-min (+ nnrss-group-max 1))) | |
| 01c52d31 MB |
595 | (let ((file (nnrss-make-filename group server)) |
| 596 | (file-name-coding-system nnmail-pathname-coding-system)) | |
| 23f87bed | 597 | (when (file-exists-p file) |
| 91472578 MB |
598 | ;; In Emacs 21.3 and earlier, `load' doesn't support non-ASCII |
| 599 | ;; file names. So, we use `insert-file-contents' instead. | |
| 600 | (mm-with-multibyte-buffer | |
| 01c52d31 | 601 | (let ((coding-system-for-read nnrss-file-coding-system)) |
| 23f87bed | 602 | (insert-file-contents file) |
| 91472578 | 603 | (eval-region (point-min) (point-max)))) |
| 23f87bed | 604 | (dolist (e nnrss-group-data) |
| 01c52d31 | 605 | (puthash (nth 9 e) t nnrss-group-hashtb) |
| 91472578 MB |
606 | (when (and (car e) (> nnrss-group-min (car e))) |
| 607 | (setq nnrss-group-min (car e))) | |
| 608 | (when (and (car e) (< nnrss-group-max (car e))) | |
| 609 | (setq nnrss-group-max (car e))))))) | |
| 23f87bed MB |
610 | |
| 611 | (defun nnrss-save-group-data (group server) | |
| 612 | (gnus-make-directory nnrss-directory) | |
| 91472578 MB |
613 | (let ((coding-system-for-write nnrss-file-coding-system) |
| 614 | (file-name-coding-system nnmail-pathname-coding-system)) | |
| 615 | (with-temp-file (nnrss-make-filename group server) | |
| 616 | (insert (format ";; -*- coding: %s; -*-\n" | |
| 617 | nnrss-file-coding-system)) | |
| 618 | (gnus-prin1 `(setq nnrss-group-data ',nnrss-group-data))))) | |
| 619 | ||
| 620 | (defun nnrss-make-filename (name server) | |
| 621 | (expand-file-name | |
| 622 | (nnrss-translate-file-chars | |
| 623 | (concat name | |
| 624 | (and server | |
| 625 | (not (equal server "")) | |
| 626 | "-") | |
| 627 | server | |
| 628 | ".el")) | |
| 629 | nnrss-directory)) | |
| 630 | ||
| 631 | (gnus-add-shutdown 'nnrss-close 'gnus) | |
| 632 | ||
| 633 | (defun nnrss-close () | |
| 634 | "Clear internal nnrss variables." | |
| 635 | (setq nnrss-group-data nil | |
| 636 | nnrss-server-data nil | |
| 637 | nnrss-group-hashtb nil | |
| 638 | nnrss-group-alist nil)) | |
| 23f87bed MB |
639 | |
| 640 | ;;; URL interface | |
| 641 | ||
| 642 | (defun nnrss-no-cache (url) | |
| 643 | "") | |
| 644 | ||
| 645 | (defun nnrss-insert-w3 (url) | |
| 646 | (mm-with-unibyte-current-buffer | |
| 7dafe00b MB |
647 | (condition-case err |
| 648 | (mm-url-insert url) | |
| 649 | (error (if (or debug-on-quit debug-on-error) | |
| 650 | (signal (car err) (cdr err)) | |
| 651 | (message "nnrss: Failed to fetch %s" url)))))) | |
| 23f87bed | 652 | |
| 91472578 | 653 | (defun nnrss-decode-entities-string (string) |
| 23f87bed | 654 | (if string |
| 91472578 | 655 | (mm-with-multibyte-buffer |
| 23f87bed MB |
656 | (insert string) |
| 657 | (mm-url-decode-entities-nbsp) | |
| 658 | (buffer-string)))) | |
| 659 | ||
| 660 | (defalias 'nnrss-insert 'nnrss-insert-w3) | |
| 661 | ||
| 91472578 MB |
662 | (defun nnrss-mime-encode-string (string) |
| 663 | (mm-with-multibyte-buffer | |
| 664 | (insert string) | |
| 665 | (mm-url-decode-entities-nbsp) | |
| 666 | (goto-char (point-min)) | |
| 667 | (while (re-search-forward "[\t\n ]+" nil t) | |
| 668 | (replace-match " ")) | |
| 669 | (goto-char (point-min)) | |
| 670 | (skip-chars-forward " ") | |
| 671 | (delete-region (point-min) (point)) | |
| 672 | (goto-char (point-max)) | |
| 673 | (skip-chars-forward " ") | |
| 674 | (delete-region (point) (point-max)) | |
| 675 | (let ((rfc2047-encoding-type 'mime) | |
| 676 | rfc2047-encode-max-chars) | |
| 677 | (rfc2047-encode-region (point-min) (point-max))) | |
| 678 | (goto-char (point-min)) | |
| 679 | (while (search-forward "\n" nil t) | |
| 680 | (delete-backward-char 1)) | |
| 681 | (buffer-string))) | |
| 682 | ||
| 23f87bed MB |
683 | ;;; Snarf functions |
| 684 | ||
| 01c52d31 MB |
685 | (defun nnrss-make-hash-index (item) |
| 686 | (setq item (gnus-remove-if | |
| 687 | (lambda (field) | |
| 688 | (when (listp field) | |
| 689 | (memq (car field) nnrss-ignore-article-fields))) | |
| 690 | item)) | |
| 691 | (md5 (gnus-prin1-to-string item) | |
| 692 | nil nil | |
| 693 | nnrss-file-coding-system)) | |
| 694 | ||
| 23f87bed | 695 | (defun nnrss-check-group (group server) |
| 7dafe00b | 696 | (let (file xml subject url extra changed author date feed-subject |
| 01c52d31 MB |
697 | enclosure comments rss-ns rdf-ns content-ns dc-ns |
| 698 | hash-index) | |
| 23f87bed MB |
699 | (if (and nnrss-use-local |
| 700 | (file-exists-p (setq file (expand-file-name | |
| 701 | (nnrss-translate-file-chars | |
| 702 | (concat group ".xml")) | |
| 703 | nnrss-directory)))) | |
| 704 | (setq xml (nnrss-fetch file t)) | |
| 705 | (setq url (or (nth 2 (assoc group nnrss-server-data)) | |
| 706 | (second (assoc group nnrss-group-alist)))) | |
| 707 | (unless url | |
| 708 | (setq url | |
| 91472578 MB |
709 | (cdr |
| 710 | (assoc 'href | |
| 711 | (nnrss-discover-feed | |
| 712 | (read-string | |
| 713 | (format "URL to search for %s: " group) "http://"))))) | |
| 23f87bed MB |
714 | (let ((pair (assoc group nnrss-server-data))) |
| 715 | (if pair | |
| 716 | (setcdr (cdr pair) (list url)) | |
| 717 | (push (list group nnrss-group-max url) nnrss-server-data))) | |
| 718 | (setq changed t)) | |
| 719 | (setq xml (nnrss-fetch url))) | |
| 720 | ;; See | |
| 721 | ;; http://feeds.archive.org/validator/docs/howto/declare_namespaces.html | |
| 722 | ;; for more RSS namespaces. | |
| 723 | (setq dc-ns (nnrss-get-namespace-prefix xml "http://purl.org/dc/elements/1.1/") | |
| 724 | rdf-ns (nnrss-get-namespace-prefix xml "http://www.w3.org/1999/02/22-rdf-syntax-ns#") | |
| 725 | rss-ns (nnrss-get-namespace-prefix xml "http://purl.org/rss/1.0/") | |
| 726 | content-ns (nnrss-get-namespace-prefix xml "http://purl.org/rss/1.0/modules/content/")) | |
| 727 | (dolist (item (nreverse (nnrss-find-el (intern (concat rss-ns "item")) xml))) | |
| 728 | (when (and (listp item) | |
| 91472578 | 729 | (string= (concat rss-ns "item") (car item)) |
| 01c52d31 MB |
730 | (progn (setq hash-index (nnrss-make-hash-index item)) |
| 731 | (not (gethash hash-index nnrss-group-hashtb)))) | |
| 23f87bed | 732 | (setq subject (nnrss-node-text rss-ns 'title item)) |
| 01c52d31 MB |
733 | (setq url (nnrss-decode-entities-string |
| 734 | (nnrss-node-text rss-ns 'link (cddr item)))) | |
| 735 | (setq extra (or (nnrss-node-text content-ns 'encoded item) | |
| 23f87bed | 736 | (nnrss-node-text rss-ns 'description item))) |
| 7dafe00b MB |
737 | (if (setq feed-subject (nnrss-node-text dc-ns 'subject item)) |
| 738 | (setq extra (concat feed-subject "<br /><br />" extra))) | |
| 23f87bed MB |
739 | (setq author (or (nnrss-node-text rss-ns 'author item) |
| 740 | (nnrss-node-text dc-ns 'creator item) | |
| 741 | (nnrss-node-text dc-ns 'contributor item))) | |
| 7dafe00b MB |
742 | (setq date (nnrss-normalize-date |
| 743 | (or (nnrss-node-text dc-ns 'date item) | |
| 744 | (nnrss-node-text rss-ns 'pubDate item)))) | |
| d3a597b7 | 745 | (setq comments (nnrss-node-text rss-ns 'comments item)) |
| 31640842 MB |
746 | (when (setq enclosure (cadr (assq (intern (concat rss-ns "enclosure")) item))) |
| 747 | (let ((url (cdr (assq 'url enclosure))) | |
| 748 | (len (cdr (assq 'length enclosure))) | |
| 749 | (type (cdr (assq 'type enclosure))) | |
| 750 | (name)) | |
| 751 | (setq len | |
| 752 | (if (and len (integerp (setq len (string-to-number len)))) | |
| 753 | ;; actually already in `ls-lisp-format-file-size' but | |
| 754 | ;; probably not worth to require it for one function | |
| 755 | (do ((size (/ len 1.0) (/ size 1024.0)) | |
| 756 | (post-fixes (list "" "k" "M" "G" "T" "P" "E") | |
| 757 | (cdr post-fixes))) | |
| 758 | ((< size 1024) | |
| 759 | (format "%.1f%s" size (car post-fixes)))) | |
| 760 | "0")) | |
| 761 | (setq url (or url "")) | |
| 762 | (setq name (if (string-match "/\\([^/]*\\)$" url) | |
| 763 | (match-string 1 url) | |
| 764 | "file")) | |
| 765 | (setq type (or type "")) | |
| 766 | (setq enclosure (list url name len type)))) | |
| 23f87bed MB |
767 | (push |
| 768 | (list | |
| 769 | (incf nnrss-group-max) | |
| 770 | (current-time) | |
| 771 | url | |
| 91472578 MB |
772 | (and subject (nnrss-mime-encode-string subject)) |
| 773 | (and author (nnrss-mime-encode-string author)) | |
| 23f87bed | 774 | date |
| 31640842 | 775 | (and extra (nnrss-decode-entities-string extra)) |
| d3a597b7 | 776 | enclosure |
| 01c52d31 MB |
777 | comments |
| 778 | hash-index) | |
| 23f87bed | 779 | nnrss-group-data) |
| 01c52d31 | 780 | (puthash hash-index t nnrss-group-hashtb) |
| 91472578 MB |
781 | (setq changed t)) |
| 782 | (setq extra nil)) | |
| 23f87bed MB |
783 | (when changed |
| 784 | (nnrss-save-group-data group server) | |
| 785 | (let ((pair (assoc group nnrss-server-data))) | |
| 786 | (if pair | |
| 787 | (setcar (cdr pair) nnrss-group-max) | |
| 788 | (push (list group nnrss-group-max) nnrss-server-data))) | |
| 789 | (nnrss-save-server-data server)))) | |
| 790 | ||
| 0f7cbeb9 GM |
791 | (declare-function gnus-group-make-rss-group "gnus-group" (&optional url)) |
| 792 | ||
| 91472578 MB |
793 | (defun nnrss-opml-import (opml-file) |
| 794 | "OPML subscriptions import. | |
| 795 | Read the file and attempt to subscribe to each Feed in the file." | |
| 796 | (interactive "fImport file: ") | |
| c4288669 MB |
797 | (mapc |
| 798 | (lambda (node) | |
| 799 | (let ((xmlurl (cdr (assq 'xmlUrl (cadr node))))) | |
| 800 | (when (and xmlurl | |
| 801 | (not (string-match "\\`[\t ]*\\'" xmlurl)) | |
| 802 | (prog1 | |
| 803 | (y-or-n-p (format "Subscribe to %s " xmlurl)) | |
| 804 | (message ""))) | |
| 805 | (condition-case err | |
| 806 | (progn | |
| 807 | (gnus-group-make-rss-group xmlurl) | |
| 808 | (forward-line 1)) | |
| 809 | (error | |
| 810 | (message | |
| 811 | "Failed to subscribe to %s (%s); type any key to continue: " | |
| 812 | xmlurl | |
| 813 | (error-message-string err)) | |
| 814 | (let ((echo-keystrokes 0)) | |
| 815 | (read-char))))))) | |
| 91472578 | 816 | (nnrss-find-el 'outline |
| c4288669 MB |
817 | (mm-with-multibyte-buffer |
| 818 | (insert-file-contents opml-file) | |
| 819 | (xml-parse-region (point-min) (point-max)))))) | |
| 91472578 MB |
820 | |
| 821 | (defun nnrss-opml-export () | |
| 822 | "OPML subscription export. | |
| 823 | Export subscriptions to a buffer in OPML Format." | |
| 824 | (interactive) | |
| 825 | (with-current-buffer (get-buffer-create "*OPML Export*") | |
| 826 | (mm-set-buffer-file-coding-system 'utf-8) | |
| 827 | (insert "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" | |
| 828 | "<!-- OPML generated by Emacs Gnus' nnrss.el -->\n" | |
| 829 | "<opml version=\"1.1\">\n" | |
| 830 | " <head>\n" | |
| 831 | " <title>mySubscriptions</title>\n" | |
| 832 | " <dateCreated>" (format-time-string "%a, %d %b %Y %T %z") | |
| 833 | "</dateCreated>\n" | |
| 834 | " <ownerEmail>" user-mail-address "</ownerEmail>\n" | |
| 835 | " <ownerName>" (user-full-name) "</ownerName>\n" | |
| 836 | " </head>\n" | |
| 837 | " <body>\n") | |
| 838 | (dolist (sub nnrss-group-alist) | |
| 839 | (insert " <outline text=\"" (car sub) | |
| 840 | "\" xmlUrl=\"" (cadr sub) "\"/>\n")) | |
| 841 | (insert " </body>\n" | |
| 842 | "</opml>\n")) | |
| 843 | (pop-to-buffer "*OPML Export*") | |
| 844 | (when (fboundp 'sgml-mode) | |
| 845 | (sgml-mode))) | |
| 846 | ||
| 23f87bed MB |
847 | (defun nnrss-generate-download-script () |
| 848 | "Generate a download script in the current buffer. | |
| 849 | It is useful when `(setq nnrss-use-local t)'." | |
| 850 | (interactive) | |
| 851 | (insert "#!/bin/sh\n") | |
| 852 | (insert "WGET=wget\n") | |
| 853 | (insert "RSSDIR='" (expand-file-name nnrss-directory) "'\n") | |
| 854 | (dolist (elem nnrss-server-data) | |
| 855 | (let ((url (or (nth 2 elem) | |
| 856 | (second (assoc (car elem) nnrss-group-alist))))) | |
| 857 | (insert "$WGET -q -O \"$RSSDIR\"/'" | |
| 858 | (nnrss-translate-file-chars (concat (car elem) ".xml")) | |
| 859 | "' '" url "'\n")))) | |
| 860 | ||
| 861 | (defun nnrss-translate-file-chars (name) | |
| 862 | (let ((nnheader-file-name-translation-alist | |
| 863 | (append nnheader-file-name-translation-alist '((?' . ?_))))) | |
| 864 | (nnheader-translate-file-chars name))) | |
| 865 | ||
| 866 | (defvar nnrss-moreover-url | |
| 867 | "http://w.moreover.com/categories/category_list_rss.html" | |
| 868 | "The url of moreover.com categories.") | |
| 869 | ||
| 870 | (defun nnrss-snarf-moreover-categories () | |
| 871 | "Snarf RSS links from moreover.com." | |
| 872 | (interactive) | |
| 873 | (let (category name url changed) | |
| 874 | (with-temp-buffer | |
| 875 | (nnrss-insert nnrss-moreover-url) | |
| 876 | (goto-char (point-min)) | |
| 877 | (while (re-search-forward | |
| 878 | "<a name=\"\\([^\"]+\\)\">\\|<a href=\"\\(http://[^\"]*moreover\\.com[^\"]+page\\?c=\\([^\"&]+\\)&o=rss\\)" nil t) | |
| 879 | (if (match-string 1) | |
| 880 | (setq category (match-string 1)) | |
| 881 | (setq url (match-string 2) | |
| 882 | name (mm-url-decode-entities-string | |
| 883 | (rfc2231-decode-encoded-string | |
| 884 | (match-string 3)))) | |
| 885 | (if category | |
| 886 | (setq name (concat category "." name))) | |
| 887 | (unless (assoc name nnrss-server-data) | |
| 888 | (setq changed t) | |
| 889 | (push (list name 0 url) nnrss-server-data))))) | |
| 890 | (if changed | |
| 891 | (nnrss-save-server-data "")))) | |
| 892 | ||
| 23f87bed MB |
893 | (defun nnrss-node-text (namespace local-name element) |
| 894 | (let* ((node (assq (intern (concat namespace (symbol-name local-name))) | |
| 895 | element)) | |
| 896 | (text (if (and node (listp node)) | |
| 897 | (nnrss-node-just-text node) | |
| 898 | node)) | |
| ff5e68bf MB |
899 | (cleaned-text (if text |
| 900 | (gnus-replace-in-string | |
| 901 | (gnus-replace-in-string | |
| 902 | text "^[\000-\037\177]+\\|^ +\\| +$" "") | |
| 903 | "\r\n" "\n")))) | |
| 23f87bed MB |
904 | (if (string-equal "" cleaned-text) |
| 905 | nil | |
| 906 | cleaned-text))) | |
| 907 | ||
| 908 | (defun nnrss-node-just-text (node) | |
| 909 | (if (and node (listp node)) | |
| 910 | (mapconcat 'nnrss-node-just-text (cddr node) " ") | |
| 911 | node)) | |
| 912 | ||
| 913 | (defun nnrss-find-el (tag data &optional found-list) | |
| 91472578 MB |
914 | "Find the all matching elements in the data. |
| 915 | Careful with this on large documents!" | |
| 916 | (when (consp data) | |
| 917 | (dolist (bit data) | |
| 918 | (when (car-safe bit) | |
| 919 | (when (equal tag (car bit)) | |
| 920 | ;; Old xml.el may return a list of string. | |
| 921 | (when (and (consp (caddr bit)) | |
| 922 | (stringp (caaddr bit))) | |
| 923 | (setcar (cddr bit) (caaddr bit))) | |
| 924 | (setq found-list | |
| 925 | (append found-list | |
| 926 | (list bit)))) | |
| 927 | (if (and (consp (car-safe (caddr bit))) | |
| 928 | (not (stringp (caddr bit)))) | |
| 929 | (setq found-list | |
| 930 | (append found-list | |
| 931 | (nnrss-find-el | |
| 932 | tag (caddr bit)))) | |
| 933 | (setq found-list | |
| 934 | (append found-list | |
| 935 | (nnrss-find-el | |
| 936 | tag (cddr bit)))))))) | |
| 23f87bed MB |
937 | found-list) |
| 938 | ||
| 939 | (defun nnrss-rsslink-p (el) | |
| 940 | "Test if the element we are handed is an RSS autodiscovery link." | |
| 941 | (and (eq (car-safe el) 'link) | |
| 942 | (string-equal (cdr (assoc 'rel (cadr el))) "alternate") | |
| 91472578 | 943 | (or (string-equal (cdr (assoc 'type (cadr el))) |
| 23f87bed MB |
944 | "application/rss+xml") |
| 945 | (string-equal (cdr (assoc 'type (cadr el))) "text/xml")))) | |
| 946 | ||
| 947 | (defun nnrss-get-rsslinks (data) | |
| 948 | "Extract the <link> elements that are links to RSS from the parsed data." | |
| 91472578 | 949 | (delq nil (mapcar |
| 23f87bed MB |
950 | (lambda (el) |
| 951 | (if (nnrss-rsslink-p el) el)) | |
| 952 | (nnrss-find-el 'link data)))) | |
| 953 | ||
| 954 | (defun nnrss-extract-hrefs (data) | |
| 91472578 MB |
955 | "Recursively extract hrefs from a page's source. |
| 956 | DATA should be the output of `xml-parse-region' or | |
| 957 | `w3-parse-buffer'." | |
| 23f87bed MB |
958 | (mapcar (lambda (ahref) |
| 959 | (cdr (assoc 'href (cadr ahref)))) | |
| 960 | (nnrss-find-el 'a data))) | |
| 961 | ||
| 91472578 | 962 | (defmacro nnrss-match-macro (base-uri item onsite-list offsite-list) |
| 23f87bed | 963 | `(cond ((or (string-match (concat "^" ,base-uri) ,item) |
| 91472578 MB |
964 | (not (string-match "://" ,item))) |
| 965 | (setq ,onsite-list (append ,onsite-list (list ,item)))) | |
| 966 | (t (setq ,offsite-list (append ,offsite-list (list ,item)))))) | |
| 23f87bed MB |
967 | |
| 968 | (defun nnrss-order-hrefs (base-uri hrefs) | |
| 969 | "Given a list of hrefs, sort them using the following priorities: | |
| 970 | 1. links ending in .rss | |
| 971 | 2. links ending in .rdf | |
| 972 | 3. links ending in .xml | |
| 973 | 4. links containing the above | |
| 974 | 5. offsite links | |
| 975 | ||
| 976 | BASE-URI is used to determine the location of the links and | |
| 977 | whether they are `offsite' or `onsite'." | |
| 978 | (let (rss-onsite-end rdf-onsite-end xml-onsite-end | |
| 979 | rss-onsite-in rdf-onsite-in xml-onsite-in | |
| 980 | rss-offsite-end rdf-offsite-end xml-offsite-end | |
| 01c52d31 | 981 | rss-offsite-in rdf-offsite-in xml-offsite-in) |
| 91472578 MB |
982 | (dolist (href hrefs) |
| 983 | (cond ((null href)) | |
| 984 | ((string-match "\\.rss$" href) | |
| 985 | (nnrss-match-macro | |
| 986 | base-uri href rss-onsite-end rss-offsite-end)) | |
| 987 | ((string-match "\\.rdf$" href) | |
| 988 | (nnrss-match-macro | |
| 989 | base-uri href rdf-onsite-end rdf-offsite-end)) | |
| 990 | ((string-match "\\.xml$" href) | |
| 991 | (nnrss-match-macro | |
| 992 | base-uri href xml-onsite-end xml-offsite-end)) | |
| 993 | ((string-match "rss" href) | |
| 994 | (nnrss-match-macro | |
| 995 | base-uri href rss-onsite-in rss-offsite-in)) | |
| 996 | ((string-match "rdf" href) | |
| 997 | (nnrss-match-macro | |
| 998 | base-uri href rdf-onsite-in rdf-offsite-in)) | |
| 999 | ((string-match "xml" href) | |
| 1000 | (nnrss-match-macro | |
| 1001 | base-uri href xml-onsite-in xml-offsite-in)))) | |
| 1002 | (append | |
| 23f87bed MB |
1003 | rss-onsite-end rdf-onsite-end xml-onsite-end |
| 1004 | rss-onsite-in rdf-onsite-in xml-onsite-in | |
| 1005 | rss-offsite-end rdf-offsite-end xml-offsite-end | |
| 1006 | rss-offsite-in rdf-offsite-in xml-offsite-in))) | |
| 1007 | ||
| 1008 | (defun nnrss-discover-feed (url) | |
| 1009 | "Given a page, find an RSS feed using Mark Pilgrim's | |
| 1010 | `ultra-liberal rss locator' (http://diveintomark.org/2002/08/15.html)." | |
| 1011 | ||
| 1012 | (let ((parsed-page (nnrss-fetch url))) | |
| 1013 | ||
| 1014 | ;; 1. if this url is the rss, use it. | |
| 1015 | (if (nnrss-rss-p parsed-page) | |
| 1016 | (let ((rss-ns (nnrss-get-namespace-prefix parsed-page "http://purl.org/rss/1.0/"))) | |
| 1017 | (nnrss-rss-title-description rss-ns parsed-page url)) | |
| 1018 | ||
| 1019 | ;; 2. look for the <link rel="alternate" | |
| 1020 | ;; type="application/rss+xml" and use that if it is there. | |
| 1021 | (let ((links (nnrss-get-rsslinks parsed-page))) | |
| 1022 | (if links | |
| 1023 | (let* ((xml (nnrss-fetch | |
| 1024 | (cdr (assoc 'href (cadar links))))) | |
| 1025 | (rss-ns (nnrss-get-namespace-prefix xml "http://purl.org/rss/1.0/"))) | |
| 1026 | (nnrss-rss-title-description rss-ns xml (cdr (assoc 'href (cadar links))))) | |
| 1027 | ||
| 1028 | ;; 3. look for links on the site in the following order: | |
| 1029 | ;; - onsite links ending in .rss, .rdf, or .xml | |
| 1030 | ;; - onsite links containing any of the above | |
| 1031 | ;; - offsite links ending in .rss, .rdf, or .xml | |
| 1032 | ;; - offsite links containing any of the above | |
| 1033 | (let* ((base-uri (progn (string-match ".*://[^/]+/?" url) | |
| 1034 | (match-string 0 url))) | |
| 91472578 | 1035 | (hrefs (nnrss-order-hrefs |
| 23f87bed MB |
1036 | base-uri (nnrss-extract-hrefs parsed-page))) |
| 1037 | (rss-link nil)) | |
| 91472578 MB |
1038 | (while (and (eq rss-link nil) (not (eq hrefs nil))) |
| 1039 | (let ((href-data (nnrss-fetch (car hrefs)))) | |
| 1040 | (if (nnrss-rss-p href-data) | |
| 1041 | (let* ((rss-ns (nnrss-get-namespace-prefix href-data "http://purl.org/rss/1.0/"))) | |
| 1042 | (setq rss-link (nnrss-rss-title-description | |
| 1043 | rss-ns href-data (car hrefs)))) | |
| 1044 | (setq hrefs (cdr hrefs))))) | |
| 1045 | (if rss-link rss-link | |
| 23f87bed MB |
1046 | |
| 1047 | ;; 4. check syndic8 | |
| 91472578 | 1048 | (nnrss-find-rss-via-syndic8 url)))))))) |
| 23f87bed MB |
1049 | |
| 1050 | (defun nnrss-find-rss-via-syndic8 (url) | |
| 91472578 | 1051 | "Query syndic8 for the rss feeds it has for URL." |
| 23f87bed MB |
1052 | (if (not (locate-library "xml-rpc")) |
| 1053 | (progn | |
| 1054 | (message "XML-RPC is not available... not checking Syndic8.") | |
| 1055 | nil) | |
| 1056 | (require 'xml-rpc) | |
| 1057 | (let ((feedid (xml-rpc-method-call | |
| 1058 | "http://www.syndic8.com/xmlrpc.php" | |
| 1059 | 'syndic8.FindSites | |
| 1060 | url))) | |
| 1061 | (when feedid | |
| 91472578 | 1062 | (let* ((feedinfo (xml-rpc-method-call |
| 23f87bed MB |
1063 | "http://www.syndic8.com/xmlrpc.php" |
| 1064 | 'syndic8.GetFeedInfo | |
| 1065 | feedid)) | |
| 1066 | (urllist | |
| 91472578 | 1067 | (delq nil |
| 23f87bed MB |
1068 | (mapcar |
| 1069 | (lambda (listinfo) | |
| 91472578 | 1070 | (if (string-equal |
| 23f87bed MB |
1071 | (cdr (assoc "status" listinfo)) |
| 1072 | "Syndicated") | |
| 1073 | (cons | |
| 1074 | (cdr (assoc "sitename" listinfo)) | |
| 1075 | (list | |
| 1076 | (cons 'title | |
| 91472578 | 1077 | (cdr (assoc |
| 23f87bed MB |
1078 | "sitename" listinfo))) |
| 1079 | (cons 'href | |
| 1080 | (cdr (assoc | |
| 1081 | "dataurl" listinfo))))))) | |
| 1082 | feedinfo)))) | |
| 1083 | (if (not (> (length urllist) 1)) | |
| 1084 | (cdar urllist) | |
| 1085 | (let ((completion-ignore-case t) | |
| 91472578 | 1086 | (selection |
| 23f87bed | 1087 | (mapcar (lambda (listinfo) |
| 91472578 | 1088 | (cons (cdr (assoc "sitename" listinfo)) |
| e9bd5782 | 1089 | (string-to-number |
| 23f87bed MB |
1090 | (cdr (assoc "feedid" listinfo))))) |
| 1091 | feedinfo))) | |
| 91472578 | 1092 | (cdr (assoc |
| 23f87bed MB |
1093 | (completing-read |
| 1094 | "Multiple feeds found. Select one: " | |
| 1095 | selection nil t) urllist))))))))) | |
| 1096 | ||
| 1097 | (defun nnrss-rss-p (data) | |
| 91472578 MB |
1098 | "Test if DATA is an RSS feed. |
| 1099 | Simply ensures that the first element is rss or rdf." | |
| 23f87bed MB |
1100 | (or (eq (caar data) 'rss) |
| 1101 | (eq (caar data) 'rdf:RDF))) | |
| 1102 | ||
| 1103 | (defun nnrss-rss-title-description (rss-namespace data url) | |
| 1104 | "Return the title of an RSS feed." | |
| 1105 | (if (nnrss-rss-p data) | |
| 1106 | (let ((description (intern (concat rss-namespace "description"))) | |
| 1107 | (title (intern (concat rss-namespace "title"))) | |
| 1108 | (channel (nnrss-find-el (intern (concat rss-namespace "channel")) | |
| 1109 | data))) | |
| 1110 | (list | |
| 1111 | (cons 'description (caddr (nth 0 (nnrss-find-el description channel)))) | |
| 1112 | (cons 'title (caddr (nth 0 (nnrss-find-el title channel)))) | |
| 1113 | (cons 'href url))))) | |
| 1114 | ||
| 1115 | (defun nnrss-get-namespace-prefix (el uri) | |
| 1116 | "Given EL (containing a parsed element) and URI (containing a string | |
| 1117 | that gives the URI for which you want to retrieve the namespace | |
| 1118 | prefix), return the prefix." | |
| 1119 | (let* ((prefix (car (rassoc uri (cadar el)))) | |
| 91472578 | 1120 | (nslist (if prefix |
| 23f87bed MB |
1121 | (split-string (symbol-name prefix) ":"))) |
| 1122 | (ns (cond ((eq (length nslist) 1) ; no prefix given | |
| 1123 | "") | |
| 1124 | ((eq (length nslist) 2) ; extract prefix | |
| 1125 | (cadr nslist))))) | |
| 91472578 | 1126 | (if (and ns (not (string= ns ""))) |
| 23f87bed MB |
1127 | (concat ns ":") |
| 1128 | ns))) | |
| 1129 | ||
| 1130 | (provide 'nnrss) | |
| 1131 | ||
| cbee283d | 1132 | ;; arch-tag: 12910c07-0cdf-44fb-8d2c-416ded64c267 |
| 23f87bed | 1133 | ;;; nnrss.el ends here |