HCoop / bpt / emacs.git / blame
| Commit | Line | Data |
|---|---|---|
| 23f87bed | 1 | ;;; nnrss.el --- interfacing with RSS |
| e84b4b86 | 2 | |
| ba318903 | 3 | ;; Copyright (C) 2001-2014 Free Software Foundation, Inc. |
| 23f87bed MB |
4 | |
| 5 | ;; Author: Shenghuo Zhu <zsh@cs.rochester.edu> | |
| 6 | ;; Keywords: RSS | |
| 7 | ||
| 8 | ;; This file is part of GNU Emacs. | |
| 9 | ||
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10 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
| 11 | ;; it under the terms of the GNU General Public License as published by | |
| 12 | ;; the Free Software Foundation, either version 3 of the License, or | |
| 13 | ;; (at your option) any later version. | |
| 23f87bed | 14 | |
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15 | ;; GNU Emacs is distributed in the hope that it will be useful, |
| 16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 18 | ;; GNU General Public License for more details. | |
| 23f87bed MB |
19 | |
| 20 | ;; You should have received a copy of the GNU General Public License | |
| 5e809f55 | 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
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22 | |
| 23 | ;;; Commentary: | |
| 24 | ||
| 25 | ;;; Code: | |
| 26 | ||
| 27 | (eval-when-compile (require 'cl)) | |
| 28 | ||
| 29 | (require 'gnus) | |
| 30 | (require 'nnoo) | |
| 31 | (require 'nnmail) | |
| 32 | (require 'message) | |
| 33 | (require 'mm-util) | |
| 34 | (require 'gnus-util) | |
| 35 | (require 'time-date) | |
| 36 | (require 'rfc2231) | |
| 37 | (require 'mm-url) | |
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38 | (require 'rfc2047) |
| 39 | (require 'mml) | |
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40 | (eval-when-compile |
| 41 | (ignore-errors | |
| 91472578 | 42 | (require 'xml))) |
| 23f87bed MB |
43 | (eval '(require 'xml)) |
| 44 | ||
| 45 | (nnoo-declare nnrss) | |
| 46 | ||
| 47 | (defvoo nnrss-directory (nnheader-concat gnus-directory "rss/") | |
| 48 | "Where nnrss will save its files.") | |
| 49 | ||
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50 | (defvoo nnrss-ignore-article-fields '(slash:comments) |
| 51 | "*List of fields that should be ignored when comparing RSS articles. | |
| 52 | Some RSS feeds update article fields during their lives, e.g. to | |
| 53 | indicate the number of comments or the number of times the | |
| 54 | articles have been seen. However, if there is a difference | |
| 55 | between the local article and the distant one, the latter is | |
| 56 | considered to be new. To avoid this and discard some fields, set | |
| 57 | this variable to the list of fields to be ignored.") | |
| 58 | ||
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59 | ;; (group max rss-url) |
| 60 | (defvoo nnrss-server-data nil) | |
| 61 | ||
| 62 | ;; (num timestamp url subject author date extra) | |
| 63 | (defvoo nnrss-group-data nil) | |
| 64 | (defvoo nnrss-group-max 0) | |
| 65 | (defvoo nnrss-group-min 1) | |
| 66 | (defvoo nnrss-group nil) | |
| 01c52d31 | 67 | (defvoo nnrss-group-hashtb (make-hash-table :test 'equal)) |
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68 | (defvoo nnrss-status-string "") |
| 69 | ||
| 70 | (defconst nnrss-version "nnrss 1.0") | |
| 71 | ||
| 72 | (defvar nnrss-group-alist '() | |
| 73 | "List of RSS addresses.") | |
| 74 | ||
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75 | (defvar nnrss-use-local nil |
| 76 | "If non-nil nnrss will read the feeds from local files in nnrss-directory.") | |
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77 | |
| 78 | (defvar nnrss-description-field 'X-Gnus-Description | |
| 79 | "Field name used for DESCRIPTION. | |
| 80 | To use the description in headers, put this name into `nnmail-extra-headers'.") | |
| 81 | ||
| 82 | (defvar nnrss-url-field 'X-Gnus-Url | |
| 83 | "Field name used for URL. | |
| 84 | To use the description in headers, put this name into `nnmail-extra-headers'.") | |
| 85 | ||
| 86 | (defvar nnrss-content-function nil | |
| 87 | "A function which is called in `nnrss-request-article'. | |
| 88 | The arguments are (ENTRY GROUP ARTICLE). | |
| 91472578 | 89 | ENTRY is the record of the current headline. GROUP is the group name. |
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90 | ARTICLE is the article number of the current headline.") |
| 91 | ||
| 91472578 | 92 | (defvar nnrss-file-coding-system mm-universal-coding-system |
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93 | "*Coding system used when reading and writing files. |
| 94 | If you run Gnus with various versions of Emacsen, the value of this | |
| 95 | variable should be the coding system that all those Emacsen support. | |
| 96 | Note that you have to regenerate all the nnrss groups if you change | |
| 97 | the value. Moreover, you should be patient even if you are made to | |
| 98 | read the same articles twice, that arises for the difference of the | |
| 99 | versions of xml.el.") | |
| 91472578 | 100 | |
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101 | (defvar nnrss-compatible-encoding-alist |
| 102 | (delq nil (mapcar (lambda (elem) | |
| 103 | (if (and (mm-coding-system-p (car elem)) | |
| 104 | (mm-coding-system-p (cdr elem))) | |
| 105 | elem)) | |
| 106 | mm-charset-override-alist)) | |
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107 | "Alist of encodings and those supersets. |
| 108 | The cdr of each element is used to decode data if it is available when | |
| 7dafe00b | 109 | the car is what the data specify as the encoding. Or, the car is used |
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110 | for decoding when the cdr that the data specify is not available.") |
| 111 | ||
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112 | (nnoo-define-basics nnrss) |
| 113 | ||
| 114 | ;;; Interface functions | |
| 115 | ||
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116 | (defsubst nnrss-format-string (string) |
| 117 | (gnus-replace-in-string string " *\n *" " ")) | |
| 118 | ||
| 119 | (defun nnrss-decode-group-name (group) | |
| 120 | (if (and group (mm-coding-system-p 'utf-8)) | |
| 121 | (setq group (mm-decode-coding-string group 'utf-8)) | |
| 122 | group)) | |
| ad136a7c | 123 | |
| 23f87bed | 124 | (deffoo nnrss-retrieve-headers (articles &optional group server fetch-old) |
| 91472578 | 125 | (setq group (nnrss-decode-group-name group)) |
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126 | (nnrss-possibly-change-group group server) |
| 127 | (let (e) | |
| 63556fc6 | 128 | (with-current-buffer nntp-server-buffer |
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129 | (erase-buffer) |
| 130 | (dolist (article articles) | |
| 131 | (if (setq e (assq article nnrss-group-data)) | |
| 132 | (insert (number-to-string (car e)) "\t" ;; number | |
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133 | ;; subject |
| 134 | (or (nth 3 e) "") | |
| 135 | "\t" | |
| 136 | ;; from | |
| 137 | (or (nth 4 e) "(nobody)") | |
| 138 | "\t" | |
| 139 | ;; date | |
| 23f87bed | 140 | (or (nth 5 e) "") |
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141 | "\t" |
| 142 | ;; id | |
| 23f87bed | 143 | (format "<%d@%s.nnrss>" (car e) group) |
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144 | "\t" |
| 145 | ;; refs | |
| 146 | "\t" | |
| 147 | ;; chars | |
| 148 | "-1" "\t" | |
| 149 | ;; lines | |
| 150 | "-1" "\t" | |
| 151 | ;; Xref | |
| 152 | "" "\t" | |
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153 | (if (and (nth 6 e) |
| 154 | (memq nnrss-description-field | |
| 155 | nnmail-extra-headers)) | |
| 156 | (concat (symbol-name nnrss-description-field) | |
| 157 | ": " | |
| 158 | (nnrss-format-string (nth 6 e)) | |
| 159 | "\t") | |
| 160 | "") | |
| 161 | (if (and (nth 2 e) | |
| 162 | (memq nnrss-url-field | |
| 163 | nnmail-extra-headers)) | |
| 164 | (concat (symbol-name nnrss-url-field) | |
| 165 | ": " | |
| 166 | (nnrss-format-string (nth 2 e)) | |
| 167 | "\t") | |
| 168 | "") | |
| 169 | "\n"))))) | |
| 170 | 'nov) | |
| 171 | ||
| 286c4fc2 | 172 | (deffoo nnrss-request-group (group &optional server dont-check info) |
| 91472578 MB |
173 | (setq group (nnrss-decode-group-name group)) |
| 174 | (nnheader-message 6 "nnrss: Requesting %s..." group) | |
| 23f87bed | 175 | (nnrss-possibly-change-group group server) |
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176 | (prog1 |
| 177 | (if dont-check | |
| 178 | t | |
| 179 | (nnrss-check-group group server) | |
| 180 | (nnheader-report 'nnrss "Opened group %s" group) | |
| 181 | (nnheader-insert | |
| 182 | "211 %d %d %d %s\n" nnrss-group-max nnrss-group-min nnrss-group-max | |
| 183 | (prin1-to-string group) | |
| 184 | t)) | |
| 185 | (nnheader-message 6 "nnrss: Requesting %s...done" group))) | |
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186 | |
| 187 | (deffoo nnrss-close-group (group &optional server) | |
| 188 | t) | |
| 189 | ||
| 190 | (deffoo nnrss-request-article (article &optional group server buffer) | |
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191 | (setq group (nnrss-decode-group-name group)) |
| 192 | (when (stringp article) | |
| 193 | (setq article (if (string-match "\\`<\\([0-9]+\\)@" article) | |
| 194 | (string-to-number (match-string 1 article)) | |
| 195 | 0))) | |
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196 | (nnrss-possibly-change-group group server) |
| 197 | (let ((e (assq article nnrss-group-data)) | |
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198 | (nntp-server-buffer (or buffer nntp-server-buffer)) |
| 199 | post err) | |
| 200 | (when e | |
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201 | (with-current-buffer nntp-server-buffer |
| 202 | (erase-buffer) | |
| 203 | (if group | |
| 204 | (insert "Newsgroups: " group "\n")) | |
| 205 | (if (nth 3 e) | |
| 206 | (insert "Subject: " (nth 3 e) "\n")) | |
| 207 | (if (nth 4 e) | |
| 208 | (insert "From: " (nth 4 e) "\n")) | |
| 209 | (if (nth 5 e) | |
| 210 | (insert "Date: " (nnrss-format-string (nth 5 e)) "\n")) | |
| 211 | (let ((header (buffer-string)) | |
| 7dafe00b | 212 | (text (nth 6 e)) |
| 91472578 | 213 | (link (nth 2 e)) |
| 31640842 | 214 | (enclosure (nth 7 e)) |
| d3a597b7 | 215 | (comments (nth 8 e)) |
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216 | (rfc2047-header-encoding-alist |
| 217 | (if (mm-coding-system-p 'utf-8) | |
| 218 | (cons '("Newsgroups" . utf-8) | |
| 219 | rfc2047-header-encoding-alist) | |
| 220 | rfc2047-header-encoding-alist)) | |
| 7dafe00b | 221 | rfc2047-encode-encoded-words body fn) |
| d3a597b7 | 222 | (when (or text link enclosure comments) |
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223 | (insert "\n") |
| 224 | (insert "<#multipart type=alternative>\n" | |
| 225 | "<#part type=\"text/plain\">\n") | |
| 226 | (setq body (point)) | |
| 31640842 | 227 | (when text |
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228 | (insert text) |
| 229 | (goto-char body) | |
| ab388ec4 KY |
230 | (while (re-search-forward "\n+" nil t) |
| 231 | (replace-match " ")) | |
| 232 | (goto-char body) | |
| 233 | ;; See `nnrss-check-group', which inserts "<br /><br />". | |
| 234 | (when (search-forward "<br /><br />" nil t) | |
| 235 | (if (eobp) | |
| 236 | (replace-match "\n") | |
| 237 | (replace-match "\n\n"))) | |
| 238 | (unless (eobp) | |
| 239 | (let ((fill-column (default-value 'fill-column)) | |
| 240 | (window (get-buffer-window nntp-server-buffer))) | |
| 241 | (when window | |
| 242 | (setq fill-column | |
| 243 | (max 1 (/ (* (window-width window) 7) 8)))) | |
| 244 | (fill-region (point) (point-max)) | |
| 245 | (goto-char (point-max)) | |
| 246 | ;; XEmacs version of `fill-region' inserts newline. | |
| 247 | (unless (bolp) | |
| 248 | (insert "\n")))) | |
| 31640842 MB |
249 | (when (or link enclosure) |
| 250 | (insert "\n"))) | |
| 251 | (when link | |
| 252 | (insert link "\n")) | |
| 253 | (when enclosure | |
| 254 | (insert (car enclosure) " " | |
| 255 | (nth 2 enclosure) " " | |
| 256 | (nth 3 enclosure) "\n")) | |
| d3a597b7 MB |
257 | (when comments |
| 258 | (insert comments "\n")) | |
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259 | (setq body (buffer-substring body (point))) |
| 260 | (insert "<#/part>\n" | |
| 261 | "<#part type=\"text/html\">\n" | |
| 262 | "<html><head></head><body>\n") | |
| 263 | (when text | |
| 264 | (insert text "\n")) | |
| 265 | (when link | |
| 266 | (insert "<p><a href=\"" link "\">link</a></p>\n")) | |
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267 | (when enclosure |
| 268 | (insert "<p><a href=\"" (car enclosure) "\">" | |
| 269 | (cadr enclosure) "</a> " (nth 2 enclosure) | |
| 270 | " " (nth 3 enclosure) "</p>\n")) | |
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271 | (when comments |
| 272 | (insert "<p><a href=\"" comments "\">comments</a></p>\n")) | |
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273 | (insert "</body></html>\n" |
| 274 | "<#/part>\n" | |
| 275 | "<#/multipart>\n")) | |
| 276 | (condition-case nil | |
| 554a69b8 KY |
277 | ;; Allow `mml-to-mime' to generate MIME article without |
| 278 | ;; making inquiry to a user for unknown encoding. | |
| 279 | (let ((mml-confirmation-set | |
| 280 | (cons 'unknown-encoding mml-confirmation-set))) | |
| 281 | (mml-to-mime)) | |
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282 | (error |
| 283 | (erase-buffer) | |
| 284 | (insert header | |
| 285 | "Content-Type: text/plain; charset=gnus-decoded\n" | |
| 286 | "Content-Transfer-Encoding: 8bit\n\n" | |
| 287 | body) | |
| 288 | (nnheader-message | |
| 289 | 3 "Warning - there might be invalid characters")))) | |
| 290 | (goto-char (point-min)) | |
| 291 | (search-forward "\n\n") | |
| 292 | (forward-line -1) | |
| 293 | (insert (format "Message-ID: <%d@%s.nnrss>\n" | |
| 294 | (car e) | |
| 295 | (let ((rfc2047-encoding-type 'mime) | |
| 296 | rfc2047-encode-max-chars) | |
| 297 | (rfc2047-encode-string | |
| 298 | (gnus-replace-in-string group "[\t\n ]+" "_"))))) | |
| 299 | (when nnrss-content-function | |
| 300 | (funcall nnrss-content-function e group article)))) | |
| 23f87bed MB |
301 | (cond |
| 302 | (err | |
| 303 | (nnheader-report 'nnrss err)) | |
| 304 | ((not e) | |
| 305 | (nnheader-report 'nnrss "no such id: %d" article)) | |
| 306 | (t | |
| 307 | (nnheader-report 'nnrss "article %s retrieved" (car e)) | |
| 308 | ;; we return the article number. | |
| 309 | (cons nnrss-group (car e)))))) | |
| 310 | ||
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311 | (deffoo nnrss-open-server (server &optional defs connectionless) |
| 312 | (nnrss-read-server-data server) | |
| 313 | (nnoo-change-server 'nnrss server defs) | |
| 314 | t) | |
| 315 | ||
| 316 | (deffoo nnrss-request-expire-articles | |
| 317 | (articles group &optional server force) | |
| 91472578 | 318 | (setq group (nnrss-decode-group-name group)) |
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319 | (nnrss-possibly-change-group group server) |
| 320 | (let (e days not-expirable changed) | |
| 321 | (dolist (art articles) | |
| 322 | (if (and (setq e (assq art nnrss-group-data)) | |
| 323 | (nnmail-expired-article-p | |
| 324 | group | |
| 325 | (if (listp (setq days (nth 1 e))) days | |
| 326 | (days-to-time (- days (time-to-days '(0 0))))) | |
| 327 | force)) | |
| 328 | (setq nnrss-group-data (delq e nnrss-group-data) | |
| 329 | changed t) | |
| 330 | (push art not-expirable))) | |
| 331 | (if changed | |
| 332 | (nnrss-save-group-data group server)) | |
| 333 | not-expirable)) | |
| 334 | ||
| 335 | (deffoo nnrss-request-delete-group (group &optional force server) | |
| 91472578 | 336 | (setq group (nnrss-decode-group-name group)) |
| 23f87bed | 337 | (nnrss-possibly-change-group group server) |
| 91472578 MB |
338 | (let (elem) |
| 339 | ;; There may be two or more entries in `nnrss-group-alist' since | |
| 340 | ;; this function didn't delete them formerly. | |
| 341 | (while (setq elem (assoc group nnrss-group-alist)) | |
| 342 | (setq nnrss-group-alist (delq elem nnrss-group-alist)))) | |
| 23f87bed MB |
343 | (setq nnrss-server-data |
| 344 | (delq (assoc group nnrss-server-data) nnrss-server-data)) | |
| 345 | (nnrss-save-server-data server) | |
| 91472578 | 346 | (ignore-errors |
| 01c52d31 MB |
347 | (let ((file-name-coding-system nnmail-pathname-coding-system)) |
| 348 | (delete-file (nnrss-make-filename group server)))) | |
| 23f87bed MB |
349 | t) |
| 350 | ||
| 351 | (deffoo nnrss-request-list-newsgroups (&optional server) | |
| 352 | (nnrss-possibly-change-group nil server) | |
| 63556fc6 | 353 | (with-current-buffer nntp-server-buffer |
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354 | (erase-buffer) |
| 355 | (dolist (elem nnrss-group-alist) | |
| 356 | (if (third elem) | |
| 357 | (insert (car elem) "\t" (third elem) "\n")))) | |
| 358 | t) | |
| 359 | ||
| 74769e8b | 360 | (deffoo nnrss-retrieve-groups (groups &optional server) |
| 74769e8b | 361 | (dolist (group groups) |
| c36da500 | 362 | (setq group (nnrss-decode-group-name group)) |
| 61b1af82 | 363 | (nnrss-possibly-change-group group server) |
| 74769e8b | 364 | (nnrss-check-group group server)) |
| 63556fc6 | 365 | (with-current-buffer nntp-server-buffer |
| 74769e8b LMI |
366 | (erase-buffer) |
| 367 | (dolist (group groups) | |
| c36da500 | 368 | (let ((elem (assoc (gnus-group-decoded-name group) nnrss-server-data))) |
| 74769e8b LMI |
369 | (insert (format "%S %s 1 y\n" group (or (cadr elem) 0))))) |
| 370 | 'active)) | |
| 371 | ||
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372 | (nnoo-define-skeleton nnrss) |
| 373 | ||
| 374 | ;;; Internal functions | |
| 375 | (eval-when-compile (defun xml-rpc-method-call (&rest args))) | |
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376 | |
| 377 | (defun nnrss-get-encoding () | |
| 378 | "Return an encoding attribute specified in the current xml contents. | |
| 379 | If `nnrss-compatible-encoding-alist' specifies the compatible encoding, | |
| 380 | it is used instead. If the xml contents doesn't specify the encoding, | |
| 381 | return `utf-8' which is the default encoding for xml if it is available, | |
| 382 | otherwise return nil." | |
| 383 | (goto-char (point-min)) | |
| 384 | (if (re-search-forward | |
| 01c52d31 | 385 | "<\\?[^>]*encoding=\\(?:\"\\([^\">]+\\)\"\\|'\\([^'>]+\\)'\\)" |
| 91472578 | 386 | nil t) |
| 01c52d31 MB |
387 | (let ((encoding (intern (downcase (or (match-string 1) |
| 388 | (match-string 2)))))) | |
| 91472578 MB |
389 | (or |
| 390 | (mm-coding-system-p (cdr (assq encoding | |
| 391 | nnrss-compatible-encoding-alist))) | |
| 392 | (mm-coding-system-p encoding) | |
| 393 | (mm-coding-system-p (car (rassq encoding | |
| 394 | nnrss-compatible-encoding-alist))))) | |
| 395 | (mm-coding-system-p 'utf-8))) | |
| 396 | ||
| 4d2226bf G |
397 | (declare-function libxml-parse-html-region "xml.c" |
| 398 | (start end &optional base-url)) | |
| 23f87bed | 399 | (defun nnrss-fetch (url &optional local) |
| 91472578 MB |
400 | "Fetch URL and put it in a the expected Lisp structure." |
| 401 | (mm-with-unibyte-buffer | |
| bff3818b | 402 | ;;some versions of url.el need this to close the connection quickly |
| 91472578 | 403 | (let (cs xmlform htmlform) |
| 23f87bed MB |
404 | ;; bit o' work necessary for w3 pre-cvs and post-cvs |
| 405 | (if local | |
| 406 | (let ((coding-system-for-read 'binary)) | |
| 407 | (insert-file-contents url)) | |
| 91472578 MB |
408 | ;; FIXME: shouldn't binding `coding-system-for-read' be moved |
| 409 | ;; to `mm-url-insert'? | |
| 410 | (let ((coding-system-for-read 'binary)) | |
| 7dafe00b MB |
411 | (condition-case err |
| 412 | (mm-url-insert url) | |
| 413 | (error (if (or debug-on-quit debug-on-error) | |
| 414 | (signal (car err) (cdr err)) | |
| 415 | (message "nnrss: Failed to fetch %s" url)))))) | |
| 91472578 MB |
416 | (nnheader-remove-cr-followed-by-lf) |
| 417 | ;; Decode text according to the encoding attribute. | |
| 418 | (when (setq cs (nnrss-get-encoding)) | |
| 11e95b02 MB |
419 | (insert (prog1 |
| 420 | (mm-decode-coding-string (buffer-string) cs) | |
| 421 | (erase-buffer) | |
| 422 | (mm-enable-multibyte)))) | |
| 91472578 MB |
423 | (goto-char (point-min)) |
| 424 | ||
| 91472578 MB |
425 | (condition-case err1 |
| 426 | (setq xmlform (xml-parse-region (point-min) (point-max))) | |
| 427 | (error | |
| 428 | (condition-case err2 | |
| 4d2226bf | 429 | (setq htmlform (libxml-parse-html-region (point-min) (point-max))) |
| 91472578 MB |
430 | (error |
| 431 | (message "\ | |
| 4d2226bf | 432 | nnrss: %s: Not valid XML %s and libxml-parse-html-region doesn't work %s" |
| 91472578 MB |
433 | url err1 err2))))) |
| 434 | (if htmlform | |
| 435 | htmlform | |
| 436 | xmlform)))) | |
| 23f87bed MB |
437 | |
| 438 | (defun nnrss-possibly-change-group (&optional group server) | |
| 439 | (when (and server | |
| 440 | (not (nnrss-server-opened server))) | |
| 441 | (nnrss-open-server server)) | |
| 442 | (when (and group (not (equal group nnrss-group))) | |
| 443 | (nnrss-read-group-data group server) | |
| 444 | (setq nnrss-group group))) | |
| 445 | ||
| 8abf1b22 | 446 | (autoload 'timezone-parse-date "timezone") |
| 7dafe00b MB |
447 | |
| 448 | (defun nnrss-normalize-date (date) | |
| 449 | "Return a date string of DATE in the RFC822 style. | |
| 450 | This function handles the ISO 8601 date format described in | |
| 0b10e437 | 451 | URL `http://www.w3.org/TR/NOTE-datetime', and also the RFC822 style |
| 7dafe00b | 452 | which RSS 2.0 allows." |
| 4079589f MB |
453 | (let (case-fold-search vector year month day time zone cts given) |
| 454 | (cond ((null date)) ; do nothing for this case | |
| 455 | ;; if the date is just digits (unix time stamp): | |
| 456 | ((string-match "^[0-9]+$" date) | |
| 457 | (setq given (seconds-to-time (string-to-number date)))) | |
| 7dafe00b MB |
458 | ;; RFC822 |
| 459 | ((string-match " [0-9]+ " date) | |
| 460 | (setq vector (timezone-parse-date date) | |
| 461 | year (string-to-number (aref vector 0))) | |
| 462 | (when (>= year 1969) | |
| 463 | (setq month (string-to-number (aref vector 1)) | |
| 464 | day (string-to-number (aref vector 2))) | |
| 465 | (unless (>= (length (setq time (aref vector 3))) 3) | |
| 466 | (setq time "00:00:00")) | |
| 467 | (when (and (setq zone (aref vector 4)) | |
| 468 | (not (string-match "\\`[A-Z+-]" zone))) | |
| 469 | (setq zone nil)))) | |
| 470 | ;; ISO 8601 | |
| 471 | ((string-match | |
| 472 | (eval-when-compile | |
| 473 | (concat | |
| 474 | ;; 1. year | |
| 475 | "\\(199[0-9]\\|20[0-9][0-9]\\)" | |
| 01c52d31 MB |
476 | "\\(?:-" |
| 477 | ;; 2. month | |
| 7dafe00b | 478 | "\\([01][0-9]\\)" |
| 01c52d31 MB |
479 | "\\(?:-" |
| 480 | ;; 3. day | |
| 7dafe00b | 481 | "\\([0-3][0-9]\\)" |
| 01c52d31 MB |
482 | "\\)?\\)?\\(?:T" |
| 483 | ;; 4. hh:mm | |
| 7dafe00b | 484 | "\\([012][0-9]:[0-5][0-9]\\)" |
| 01c52d31 MB |
485 | "\\(?:" |
| 486 | ;; 5. :ss | |
| 7dafe00b | 487 | "\\(:[0-5][0-9]\\)" |
| 01c52d31 MB |
488 | "\\(?:\\.[0-9]+\\)?\\)?\\)?" |
| 489 | ;; 6+7,8,9. zone | |
| 490 | "\\(?:\\(?:\\([+-][012][0-9]\\):\\([0-5][0-9]\\)\\)" | |
| 7dafe00b MB |
491 | "\\|\\([+-][012][0-9][0-5][0-9]\\)" |
| 492 | "\\|\\(Z\\)\\)?")) | |
| 493 | date) | |
| 494 | (setq year (string-to-number (match-string 1 date)) | |
| 01c52d31 MB |
495 | month (string-to-number (or (match-string 2 date) "1")) |
| 496 | day (string-to-number (or (match-string 3 date) "1")) | |
| 497 | time (if (match-beginning 5) | |
| 498 | (substring date (match-beginning 4) (match-end 5)) | |
| 499 | (concat (or (match-string 4 date) "00:00") ":00")) | |
| 500 | zone (cond ((match-beginning 6) | |
| 501 | (concat (match-string 6 date) | |
| 502 | (match-string 7 date))) | |
| 503 | ((match-beginning 9) ;; Z | |
| 7dafe00b MB |
504 | "+0000") |
| 505 | (t ;; nil if zone is not provided. | |
| 01c52d31 | 506 | (match-string 8 date)))))) |
| 7dafe00b MB |
507 | (if month |
| 508 | (progn | |
| 509 | (setq cts (current-time-string (encode-time 0 0 0 day month year))) | |
| 510 | (format "%s, %02d %s %04d %s%s" | |
| 511 | (substring cts 0 3) day (substring cts 4 7) year time | |
| 512 | (if zone | |
| 513 | (concat " " zone) | |
| 514 | ""))) | |
| 4079589f | 515 | (message-make-date given)))) |
| 7dafe00b | 516 | |
| 23f87bed MB |
517 | ;;; data functions |
| 518 | ||
| 519 | (defun nnrss-read-server-data (server) | |
| 520 | (setq nnrss-server-data nil) | |
| 01c52d31 MB |
521 | (let ((file (nnrss-make-filename "nnrss" server)) |
| 522 | (file-name-coding-system nnmail-pathname-coding-system)) | |
| 23f87bed | 523 | (when (file-exists-p file) |
| 0c43b6f8 | 524 | (load file nil t t)))) |
| 23f87bed MB |
525 | |
| 526 | (defun nnrss-save-server-data (server) | |
| 527 | (gnus-make-directory nnrss-directory) | |
| 91472578 MB |
528 | (let ((coding-system-for-write nnrss-file-coding-system) |
| 529 | (file-name-coding-system nnmail-pathname-coding-system)) | |
| 530 | (with-temp-file (nnrss-make-filename "nnrss" server) | |
| 531 | (insert (format ";; -*- coding: %s; -*-\n" | |
| 532 | nnrss-file-coding-system)) | |
| 533 | (gnus-prin1 `(setq nnrss-group-alist ',nnrss-group-alist)) | |
| 534 | (insert "\n") | |
| 535 | (gnus-prin1 `(setq nnrss-server-data ',nnrss-server-data))))) | |
| 23f87bed MB |
536 | |
| 537 | (defun nnrss-read-group-data (group server) | |
| 538 | (setq nnrss-group-data nil) | |
| 01c52d31 MB |
539 | (if (hash-table-p nnrss-group-hashtb) |
| 540 | (clrhash nnrss-group-hashtb) | |
| 541 | (setq nnrss-group-hashtb (make-hash-table :test 'equal))) | |
| 23f87bed MB |
542 | (let ((pair (assoc group nnrss-server-data))) |
| 543 | (setq nnrss-group-max (or (cadr pair) 0)) | |
| 544 | (setq nnrss-group-min (+ nnrss-group-max 1))) | |
| 01c52d31 MB |
545 | (let ((file (nnrss-make-filename group server)) |
| 546 | (file-name-coding-system nnmail-pathname-coding-system)) | |
| 23f87bed | 547 | (when (file-exists-p file) |
| 0c43b6f8 | 548 | (load file nil t t) |
| 23f87bed | 549 | (dolist (e nnrss-group-data) |
| 01c52d31 | 550 | (puthash (nth 9 e) t nnrss-group-hashtb) |
| 91472578 MB |
551 | (when (and (car e) (> nnrss-group-min (car e))) |
| 552 | (setq nnrss-group-min (car e))) | |
| 553 | (when (and (car e) (< nnrss-group-max (car e))) | |
| 554 | (setq nnrss-group-max (car e))))))) | |
| 23f87bed MB |
555 | |
| 556 | (defun nnrss-save-group-data (group server) | |
| 557 | (gnus-make-directory nnrss-directory) | |
| 91472578 MB |
558 | (let ((coding-system-for-write nnrss-file-coding-system) |
| 559 | (file-name-coding-system nnmail-pathname-coding-system)) | |
| 560 | (with-temp-file (nnrss-make-filename group server) | |
| 561 | (insert (format ";; -*- coding: %s; -*-\n" | |
| 562 | nnrss-file-coding-system)) | |
| 563 | (gnus-prin1 `(setq nnrss-group-data ',nnrss-group-data))))) | |
| 564 | ||
| 565 | (defun nnrss-make-filename (name server) | |
| 566 | (expand-file-name | |
| 567 | (nnrss-translate-file-chars | |
| 568 | (concat name | |
| 569 | (and server | |
| 570 | (not (equal server "")) | |
| 571 | "-") | |
| 572 | server | |
| 573 | ".el")) | |
| 574 | nnrss-directory)) | |
| 575 | ||
| 576 | (gnus-add-shutdown 'nnrss-close 'gnus) | |
| 577 | ||
| 578 | (defun nnrss-close () | |
| 579 | "Clear internal nnrss variables." | |
| 580 | (setq nnrss-group-data nil | |
| 581 | nnrss-server-data nil | |
| 582 | nnrss-group-hashtb nil | |
| 583 | nnrss-group-alist nil)) | |
| 23f87bed MB |
584 | |
| 585 | ;;; URL interface | |
| 586 | ||
| 587 | (defun nnrss-no-cache (url) | |
| 588 | "") | |
| 589 | ||
| 4d2226bf | 590 | (defun nnrss-insert (url) |
| 23f87bed | 591 | (mm-with-unibyte-current-buffer |
| 7dafe00b MB |
592 | (condition-case err |
| 593 | (mm-url-insert url) | |
| 594 | (error (if (or debug-on-quit debug-on-error) | |
| 595 | (signal (car err) (cdr err)) | |
| 596 | (message "nnrss: Failed to fetch %s" url)))))) | |
| 23f87bed | 597 | |
| 91472578 | 598 | (defun nnrss-decode-entities-string (string) |
| 23f87bed | 599 | (if string |
| 91472578 | 600 | (mm-with-multibyte-buffer |
| 23f87bed MB |
601 | (insert string) |
| 602 | (mm-url-decode-entities-nbsp) | |
| 603 | (buffer-string)))) | |
| 604 | ||
| 91472578 MB |
605 | (defun nnrss-mime-encode-string (string) |
| 606 | (mm-with-multibyte-buffer | |
| 607 | (insert string) | |
| 608 | (mm-url-decode-entities-nbsp) | |
| 609 | (goto-char (point-min)) | |
| 610 | (while (re-search-forward "[\t\n ]+" nil t) | |
| 611 | (replace-match " ")) | |
| 612 | (goto-char (point-min)) | |
| 613 | (skip-chars-forward " ") | |
| 614 | (delete-region (point-min) (point)) | |
| 615 | (goto-char (point-max)) | |
| 616 | (skip-chars-forward " ") | |
| 617 | (delete-region (point) (point-max)) | |
| 618 | (let ((rfc2047-encoding-type 'mime) | |
| 619 | rfc2047-encode-max-chars) | |
| 620 | (rfc2047-encode-region (point-min) (point-max))) | |
| 621 | (goto-char (point-min)) | |
| 622 | (while (search-forward "\n" nil t) | |
| d355a0b7 | 623 | (delete-char -1)) |
| 91472578 MB |
624 | (buffer-string))) |
| 625 | ||
| 23f87bed | 626 | ;;; Snarf functions |
| 01c52d31 | 627 | (defun nnrss-make-hash-index (item) |
| 5b51650c | 628 | (gnus-message 9 "nnrss: Making hash index of %s" (gnus-prin1-to-string item)) |
| 01c52d31 MB |
629 | (setq item (gnus-remove-if |
| 630 | (lambda (field) | |
| 631 | (when (listp field) | |
| 632 | (memq (car field) nnrss-ignore-article-fields))) | |
| 633 | item)) | |
| 634 | (md5 (gnus-prin1-to-string item) | |
| 635 | nil nil | |
| 636 | nnrss-file-coding-system)) | |
| 637 | ||
| 23f87bed | 638 | (defun nnrss-check-group (group server) |
| 7dafe00b | 639 | (let (file xml subject url extra changed author date feed-subject |
| 01c52d31 MB |
640 | enclosure comments rss-ns rdf-ns content-ns dc-ns |
| 641 | hash-index) | |
| 23f87bed MB |
642 | (if (and nnrss-use-local |
| 643 | (file-exists-p (setq file (expand-file-name | |
| 644 | (nnrss-translate-file-chars | |
| 645 | (concat group ".xml")) | |
| 646 | nnrss-directory)))) | |
| 647 | (setq xml (nnrss-fetch file t)) | |
| 648 | (setq url (or (nth 2 (assoc group nnrss-server-data)) | |
| 649 | (second (assoc group nnrss-group-alist)))) | |
| 650 | (unless url | |
| 651 | (setq url | |
| 91472578 MB |
652 | (cdr |
| 653 | (assoc 'href | |
| 654 | (nnrss-discover-feed | |
| 655 | (read-string | |
| 656 | (format "URL to search for %s: " group) "http://"))))) | |
| 23f87bed MB |
657 | (let ((pair (assoc group nnrss-server-data))) |
| 658 | (if pair | |
| 659 | (setcdr (cdr pair) (list url)) | |
| 660 | (push (list group nnrss-group-max url) nnrss-server-data))) | |
| 661 | (setq changed t)) | |
| 662 | (setq xml (nnrss-fetch url))) | |
| 23f87bed MB |
663 | (setq dc-ns (nnrss-get-namespace-prefix xml "http://purl.org/dc/elements/1.1/") |
| 664 | rdf-ns (nnrss-get-namespace-prefix xml "http://www.w3.org/1999/02/22-rdf-syntax-ns#") | |
| 665 | rss-ns (nnrss-get-namespace-prefix xml "http://purl.org/rss/1.0/") | |
| 666 | content-ns (nnrss-get-namespace-prefix xml "http://purl.org/rss/1.0/modules/content/")) | |
| 667 | (dolist (item (nreverse (nnrss-find-el (intern (concat rss-ns "item")) xml))) | |
| 668 | (when (and (listp item) | |
| 91472578 | 669 | (string= (concat rss-ns "item") (car item)) |
| 01c52d31 MB |
670 | (progn (setq hash-index (nnrss-make-hash-index item)) |
| 671 | (not (gethash hash-index nnrss-group-hashtb)))) | |
| 23f87bed | 672 | (setq subject (nnrss-node-text rss-ns 'title item)) |
| 01c52d31 MB |
673 | (setq url (nnrss-decode-entities-string |
| 674 | (nnrss-node-text rss-ns 'link (cddr item)))) | |
| 675 | (setq extra (or (nnrss-node-text content-ns 'encoded item) | |
| 23f87bed | 676 | (nnrss-node-text rss-ns 'description item))) |
| 7dafe00b MB |
677 | (if (setq feed-subject (nnrss-node-text dc-ns 'subject item)) |
| 678 | (setq extra (concat feed-subject "<br /><br />" extra))) | |
| 23f87bed MB |
679 | (setq author (or (nnrss-node-text rss-ns 'author item) |
| 680 | (nnrss-node-text dc-ns 'creator item) | |
| 681 | (nnrss-node-text dc-ns 'contributor item))) | |
| 7dafe00b MB |
682 | (setq date (nnrss-normalize-date |
| 683 | (or (nnrss-node-text dc-ns 'date item) | |
| 684 | (nnrss-node-text rss-ns 'pubDate item)))) | |
| d3a597b7 | 685 | (setq comments (nnrss-node-text rss-ns 'comments item)) |
| 31640842 MB |
686 | (when (setq enclosure (cadr (assq (intern (concat rss-ns "enclosure")) item))) |
| 687 | (let ((url (cdr (assq 'url enclosure))) | |
| 688 | (len (cdr (assq 'length enclosure))) | |
| 689 | (type (cdr (assq 'type enclosure))) | |
| 690 | (name)) | |
| 691 | (setq len | |
| 692 | (if (and len (integerp (setq len (string-to-number len)))) | |
| 693 | ;; actually already in `ls-lisp-format-file-size' but | |
| 694 | ;; probably not worth to require it for one function | |
| 695 | (do ((size (/ len 1.0) (/ size 1024.0)) | |
| 696 | (post-fixes (list "" "k" "M" "G" "T" "P" "E") | |
| 697 | (cdr post-fixes))) | |
| 698 | ((< size 1024) | |
| 699 | (format "%.1f%s" size (car post-fixes)))) | |
| 700 | "0")) | |
| 701 | (setq url (or url "")) | |
| 702 | (setq name (if (string-match "/\\([^/]*\\)$" url) | |
| 703 | (match-string 1 url) | |
| 704 | "file")) | |
| 705 | (setq type (or type "")) | |
| 706 | (setq enclosure (list url name len type)))) | |
| 23f87bed MB |
707 | (push |
| 708 | (list | |
| 709 | (incf nnrss-group-max) | |
| 710 | (current-time) | |
| 711 | url | |
| 91472578 MB |
712 | (and subject (nnrss-mime-encode-string subject)) |
| 713 | (and author (nnrss-mime-encode-string author)) | |
| 23f87bed | 714 | date |
| 31640842 | 715 | (and extra (nnrss-decode-entities-string extra)) |
| d3a597b7 | 716 | enclosure |
| 01c52d31 MB |
717 | comments |
| 718 | hash-index) | |
| 23f87bed | 719 | nnrss-group-data) |
| 01c52d31 | 720 | (puthash hash-index t nnrss-group-hashtb) |
| 91472578 MB |
721 | (setq changed t)) |
| 722 | (setq extra nil)) | |
| 23f87bed MB |
723 | (when changed |
| 724 | (nnrss-save-group-data group server) | |
| 725 | (let ((pair (assoc group nnrss-server-data))) | |
| 726 | (if pair | |
| 727 | (setcar (cdr pair) nnrss-group-max) | |
| 728 | (push (list group nnrss-group-max) nnrss-server-data))) | |
| 729 | (nnrss-save-server-data server)))) | |
| 730 | ||
| 0f7cbeb9 GM |
731 | (declare-function gnus-group-make-rss-group "gnus-group" (&optional url)) |
| 732 | ||
| 91472578 MB |
733 | (defun nnrss-opml-import (opml-file) |
| 734 | "OPML subscriptions import. | |
| 735 | Read the file and attempt to subscribe to each Feed in the file." | |
| 736 | (interactive "fImport file: ") | |
| c4288669 MB |
737 | (mapc |
| 738 | (lambda (node) | |
| 739 | (let ((xmlurl (cdr (assq 'xmlUrl (cadr node))))) | |
| 740 | (when (and xmlurl | |
| 741 | (not (string-match "\\`[\t ]*\\'" xmlurl)) | |
| 742 | (prog1 | |
| 743 | (y-or-n-p (format "Subscribe to %s " xmlurl)) | |
| 744 | (message ""))) | |
| 745 | (condition-case err | |
| 746 | (progn | |
| 747 | (gnus-group-make-rss-group xmlurl) | |
| 748 | (forward-line 1)) | |
| 749 | (error | |
| 750 | (message | |
| 751 | "Failed to subscribe to %s (%s); type any key to continue: " | |
| 752 | xmlurl | |
| 753 | (error-message-string err)) | |
| 754 | (let ((echo-keystrokes 0)) | |
| 755 | (read-char))))))) | |
| 91472578 | 756 | (nnrss-find-el 'outline |
| c4288669 MB |
757 | (mm-with-multibyte-buffer |
| 758 | (insert-file-contents opml-file) | |
| 759 | (xml-parse-region (point-min) (point-max)))))) | |
| 91472578 MB |
760 | |
| 761 | (defun nnrss-opml-export () | |
| 762 | "OPML subscription export. | |
| 763 | Export subscriptions to a buffer in OPML Format." | |
| 764 | (interactive) | |
| 765 | (with-current-buffer (get-buffer-create "*OPML Export*") | |
| 766 | (mm-set-buffer-file-coding-system 'utf-8) | |
| 767 | (insert "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" | |
| 768 | "<!-- OPML generated by Emacs Gnus' nnrss.el -->\n" | |
| 769 | "<opml version=\"1.1\">\n" | |
| 770 | " <head>\n" | |
| 771 | " <title>mySubscriptions</title>\n" | |
| 772 | " <dateCreated>" (format-time-string "%a, %d %b %Y %T %z") | |
| 773 | "</dateCreated>\n" | |
| 774 | " <ownerEmail>" user-mail-address "</ownerEmail>\n" | |
| 775 | " <ownerName>" (user-full-name) "</ownerName>\n" | |
| 776 | " </head>\n" | |
| 777 | " <body>\n") | |
| 778 | (dolist (sub nnrss-group-alist) | |
| 779 | (insert " <outline text=\"" (car sub) | |
| 780 | "\" xmlUrl=\"" (cadr sub) "\"/>\n")) | |
| 781 | (insert " </body>\n" | |
| 782 | "</opml>\n")) | |
| 783 | (pop-to-buffer "*OPML Export*") | |
| 784 | (when (fboundp 'sgml-mode) | |
| 785 | (sgml-mode))) | |
| 786 | ||
| 23f87bed MB |
787 | (defun nnrss-generate-download-script () |
| 788 | "Generate a download script in the current buffer. | |
| 789 | It is useful when `(setq nnrss-use-local t)'." | |
| 790 | (interactive) | |
| 791 | (insert "#!/bin/sh\n") | |
| 792 | (insert "WGET=wget\n") | |
| 793 | (insert "RSSDIR='" (expand-file-name nnrss-directory) "'\n") | |
| 794 | (dolist (elem nnrss-server-data) | |
| 795 | (let ((url (or (nth 2 elem) | |
| 796 | (second (assoc (car elem) nnrss-group-alist))))) | |
| 797 | (insert "$WGET -q -O \"$RSSDIR\"/'" | |
| 798 | (nnrss-translate-file-chars (concat (car elem) ".xml")) | |
| 799 | "' '" url "'\n")))) | |
| 800 | ||
| 801 | (defun nnrss-translate-file-chars (name) | |
| 802 | (let ((nnheader-file-name-translation-alist | |
| 803 | (append nnheader-file-name-translation-alist '((?' . ?_))))) | |
| 804 | (nnheader-translate-file-chars name))) | |
| 805 | ||
| 23f87bed MB |
806 | (defun nnrss-node-text (namespace local-name element) |
| 807 | (let* ((node (assq (intern (concat namespace (symbol-name local-name))) | |
| 808 | element)) | |
| 809 | (text (if (and node (listp node)) | |
| 810 | (nnrss-node-just-text node) | |
| 811 | node)) | |
| ff5e68bf MB |
812 | (cleaned-text (if text |
| 813 | (gnus-replace-in-string | |
| 814 | (gnus-replace-in-string | |
| 815 | text "^[\000-\037\177]+\\|^ +\\| +$" "") | |
| 816 | "\r\n" "\n")))) | |
| 23f87bed MB |
817 | (if (string-equal "" cleaned-text) |
| 818 | nil | |
| 819 | cleaned-text))) | |
| 820 | ||
| 821 | (defun nnrss-node-just-text (node) | |
| 822 | (if (and node (listp node)) | |
| 823 | (mapconcat 'nnrss-node-just-text (cddr node) " ") | |
| 824 | node)) | |
| 825 | ||
| 826 | (defun nnrss-find-el (tag data &optional found-list) | |
| 91472578 MB |
827 | "Find the all matching elements in the data. |
| 828 | Careful with this on large documents!" | |
| 829 | (when (consp data) | |
| 830 | (dolist (bit data) | |
| 831 | (when (car-safe bit) | |
| 832 | (when (equal tag (car bit)) | |
| 833 | ;; Old xml.el may return a list of string. | |
| 834 | (when (and (consp (caddr bit)) | |
| 835 | (stringp (caaddr bit))) | |
| 836 | (setcar (cddr bit) (caaddr bit))) | |
| 837 | (setq found-list | |
| 838 | (append found-list | |
| 839 | (list bit)))) | |
| 840 | (if (and (consp (car-safe (caddr bit))) | |
| 841 | (not (stringp (caddr bit)))) | |
| 842 | (setq found-list | |
| 843 | (append found-list | |
| 844 | (nnrss-find-el | |
| 845 | tag (caddr bit)))) | |
| 846 | (setq found-list | |
| 847 | (append found-list | |
| 848 | (nnrss-find-el | |
| 849 | tag (cddr bit)))))))) | |
| 23f87bed MB |
850 | found-list) |
| 851 | ||
| 852 | (defun nnrss-rsslink-p (el) | |
| 853 | "Test if the element we are handed is an RSS autodiscovery link." | |
| 854 | (and (eq (car-safe el) 'link) | |
| 855 | (string-equal (cdr (assoc 'rel (cadr el))) "alternate") | |
| 91472578 | 856 | (or (string-equal (cdr (assoc 'type (cadr el))) |
| 23f87bed MB |
857 | "application/rss+xml") |
| 858 | (string-equal (cdr (assoc 'type (cadr el))) "text/xml")))) | |
| 859 | ||
| 860 | (defun nnrss-get-rsslinks (data) | |
| 861 | "Extract the <link> elements that are links to RSS from the parsed data." | |
| 91472578 | 862 | (delq nil (mapcar |
| 23f87bed MB |
863 | (lambda (el) |
| 864 | (if (nnrss-rsslink-p el) el)) | |
| 865 | (nnrss-find-el 'link data)))) | |
| 866 | ||
| 867 | (defun nnrss-extract-hrefs (data) | |
| 91472578 | 868 | "Recursively extract hrefs from a page's source. |
| 4d2226bf | 869 | DATA should be the output of `xml-parse-region'." |
| 23f87bed MB |
870 | (mapcar (lambda (ahref) |
| 871 | (cdr (assoc 'href (cadr ahref)))) | |
| 872 | (nnrss-find-el 'a data))) | |
| 873 | ||
| 91472578 | 874 | (defmacro nnrss-match-macro (base-uri item onsite-list offsite-list) |
| 23f87bed | 875 | `(cond ((or (string-match (concat "^" ,base-uri) ,item) |
| 91472578 MB |
876 | (not (string-match "://" ,item))) |
| 877 | (setq ,onsite-list (append ,onsite-list (list ,item)))) | |
| 878 | (t (setq ,offsite-list (append ,offsite-list (list ,item)))))) | |
| 23f87bed MB |
879 | |
| 880 | (defun nnrss-order-hrefs (base-uri hrefs) | |
| 881 | "Given a list of hrefs, sort them using the following priorities: | |
| 882 | 1. links ending in .rss | |
| 883 | 2. links ending in .rdf | |
| 884 | 3. links ending in .xml | |
| 885 | 4. links containing the above | |
| 886 | 5. offsite links | |
| 887 | ||
| 888 | BASE-URI is used to determine the location of the links and | |
| 889 | whether they are `offsite' or `onsite'." | |
| 890 | (let (rss-onsite-end rdf-onsite-end xml-onsite-end | |
| 891 | rss-onsite-in rdf-onsite-in xml-onsite-in | |
| 892 | rss-offsite-end rdf-offsite-end xml-offsite-end | |
| 01c52d31 | 893 | rss-offsite-in rdf-offsite-in xml-offsite-in) |
| 91472578 MB |
894 | (dolist (href hrefs) |
| 895 | (cond ((null href)) | |
| 896 | ((string-match "\\.rss$" href) | |
| 897 | (nnrss-match-macro | |
| 898 | base-uri href rss-onsite-end rss-offsite-end)) | |
| 899 | ((string-match "\\.rdf$" href) | |
| 900 | (nnrss-match-macro | |
| 901 | base-uri href rdf-onsite-end rdf-offsite-end)) | |
| 902 | ((string-match "\\.xml$" href) | |
| 903 | (nnrss-match-macro | |
| 904 | base-uri href xml-onsite-end xml-offsite-end)) | |
| 905 | ((string-match "rss" href) | |
| 906 | (nnrss-match-macro | |
| 907 | base-uri href rss-onsite-in rss-offsite-in)) | |
| 908 | ((string-match "rdf" href) | |
| 909 | (nnrss-match-macro | |
| 910 | base-uri href rdf-onsite-in rdf-offsite-in)) | |
| 911 | ((string-match "xml" href) | |
| 912 | (nnrss-match-macro | |
| 913 | base-uri href xml-onsite-in xml-offsite-in)))) | |
| 914 | (append | |
| 23f87bed MB |
915 | rss-onsite-end rdf-onsite-end xml-onsite-end |
| 916 | rss-onsite-in rdf-onsite-in xml-onsite-in | |
| 917 | rss-offsite-end rdf-offsite-end xml-offsite-end | |
| 918 | rss-offsite-in rdf-offsite-in xml-offsite-in))) | |
| 919 | ||
| 920 | (defun nnrss-discover-feed (url) | |
| 51457e00 LMI |
921 | "Given a page, find an RSS feed. |
| 922 | Use Mark Pilgrim's `ultra-liberal rss locator'." | |
| 23f87bed | 923 | (let ((parsed-page (nnrss-fetch url))) |
| 51457e00 | 924 | ;; 1. if this url is the rss, use it. |
| 23f87bed MB |
925 | (if (nnrss-rss-p parsed-page) |
| 926 | (let ((rss-ns (nnrss-get-namespace-prefix parsed-page "http://purl.org/rss/1.0/"))) | |
| 927 | (nnrss-rss-title-description rss-ns parsed-page url)) | |
| 928 | ||
| 51457e00 LMI |
929 | ;; 2. look for the <link rel="alternate" |
| 930 | ;; type="application/rss+xml" and use that if it is there. | |
| 23f87bed MB |
931 | (let ((links (nnrss-get-rsslinks parsed-page))) |
| 932 | (if links | |
| 933 | (let* ((xml (nnrss-fetch | |
| 934 | (cdr (assoc 'href (cadar links))))) | |
| 51457e00 LMI |
935 | (rss-ns (nnrss-get-namespace-prefix |
| 936 | xml "http://purl.org/rss/1.0/"))) | |
| 937 | (nnrss-rss-title-description | |
| 938 | rss-ns xml (cdr (assoc 'href (cadar links))))) | |
| 939 | ||
| 940 | ;; 3. look for links on the site in the following order: | |
| 941 | ;; - onsite links ending in .rss, .rdf, or .xml | |
| 942 | ;; - onsite links containing any of the above | |
| 943 | ;; - offsite links ending in .rss, .rdf, or .xml | |
| 944 | ;; - offsite links containing any of the above | |
| 23f87bed MB |
945 | (let* ((base-uri (progn (string-match ".*://[^/]+/?" url) |
| 946 | (match-string 0 url))) | |
| 91472578 | 947 | (hrefs (nnrss-order-hrefs |
| 23f87bed MB |
948 | base-uri (nnrss-extract-hrefs parsed-page))) |
| 949 | (rss-link nil)) | |
| 91472578 MB |
950 | (while (and (eq rss-link nil) (not (eq hrefs nil))) |
| 951 | (let ((href-data (nnrss-fetch (car hrefs)))) | |
| 952 | (if (nnrss-rss-p href-data) | |
| 953 | (let* ((rss-ns (nnrss-get-namespace-prefix href-data "http://purl.org/rss/1.0/"))) | |
| 954 | (setq rss-link (nnrss-rss-title-description | |
| 955 | rss-ns href-data (car hrefs)))) | |
| 956 | (setq hrefs (cdr hrefs))))) | |
| 51457e00 LMI |
957 | (if rss-link |
| 958 | rss-link | |
| 959 | ;; 4. check syndic8 | |
| 91472578 | 960 | (nnrss-find-rss-via-syndic8 url)))))))) |
| 23f87bed MB |
961 | |
| 962 | (defun nnrss-find-rss-via-syndic8 (url) | |
| 91472578 | 963 | "Query syndic8 for the rss feeds it has for URL." |
| 23f87bed MB |
964 | (if (not (locate-library "xml-rpc")) |
| 965 | (progn | |
| 966 | (message "XML-RPC is not available... not checking Syndic8.") | |
| 967 | nil) | |
| 968 | (require 'xml-rpc) | |
| 969 | (let ((feedid (xml-rpc-method-call | |
| 970 | "http://www.syndic8.com/xmlrpc.php" | |
| 971 | 'syndic8.FindSites | |
| 972 | url))) | |
| 973 | (when feedid | |
| 91472578 | 974 | (let* ((feedinfo (xml-rpc-method-call |
| 23f87bed MB |
975 | "http://www.syndic8.com/xmlrpc.php" |
| 976 | 'syndic8.GetFeedInfo | |
| 977 | feedid)) | |
| 978 | (urllist | |
| 91472578 | 979 | (delq nil |
| 23f87bed MB |
980 | (mapcar |
| 981 | (lambda (listinfo) | |
| 91472578 | 982 | (if (string-equal |
| 23f87bed MB |
983 | (cdr (assoc "status" listinfo)) |
| 984 | "Syndicated") | |
| 985 | (cons | |
| 986 | (cdr (assoc "sitename" listinfo)) | |
| 987 | (list | |
| 988 | (cons 'title | |
| 91472578 | 989 | (cdr (assoc |
| 23f87bed MB |
990 | "sitename" listinfo))) |
| 991 | (cons 'href | |
| 992 | (cdr (assoc | |
| 993 | "dataurl" listinfo))))))) | |
| 994 | feedinfo)))) | |
| 995 | (if (not (> (length urllist) 1)) | |
| 996 | (cdar urllist) | |
| 997 | (let ((completion-ignore-case t) | |
| 91472578 | 998 | (selection |
| 23f87bed | 999 | (mapcar (lambda (listinfo) |
| 91472578 | 1000 | (cons (cdr (assoc "sitename" listinfo)) |
| e9bd5782 | 1001 | (string-to-number |
| 23f87bed MB |
1002 | (cdr (assoc "feedid" listinfo))))) |
| 1003 | feedinfo))) | |
| 91472578 | 1004 | (cdr (assoc |
| 229b59da G |
1005 | (gnus-completing-read |
| 1006 | "Multiple feeds found. Select one" | |
| 1007 | selection t) urllist))))))))) | |
| 23f87bed MB |
1008 | |
| 1009 | (defun nnrss-rss-p (data) | |
| 91472578 MB |
1010 | "Test if DATA is an RSS feed. |
| 1011 | Simply ensures that the first element is rss or rdf." | |
| 23f87bed MB |
1012 | (or (eq (caar data) 'rss) |
| 1013 | (eq (caar data) 'rdf:RDF))) | |
| 1014 | ||
| 1015 | (defun nnrss-rss-title-description (rss-namespace data url) | |
| 1016 | "Return the title of an RSS feed." | |
| 1017 | (if (nnrss-rss-p data) | |
| 1018 | (let ((description (intern (concat rss-namespace "description"))) | |
| 1019 | (title (intern (concat rss-namespace "title"))) | |
| 1020 | (channel (nnrss-find-el (intern (concat rss-namespace "channel")) | |
| 1021 | data))) | |
| 1022 | (list | |
| 1023 | (cons 'description (caddr (nth 0 (nnrss-find-el description channel)))) | |
| 1024 | (cons 'title (caddr (nth 0 (nnrss-find-el title channel)))) | |
| 1025 | (cons 'href url))))) | |
| 1026 | ||
| 1027 | (defun nnrss-get-namespace-prefix (el uri) | |
| 1028 | "Given EL (containing a parsed element) and URI (containing a string | |
| 1029 | that gives the URI for which you want to retrieve the namespace | |
| 1030 | prefix), return the prefix." | |
| 1031 | (let* ((prefix (car (rassoc uri (cadar el)))) | |
| 91472578 | 1032 | (nslist (if prefix |
| 23f87bed MB |
1033 | (split-string (symbol-name prefix) ":"))) |
| 1034 | (ns (cond ((eq (length nslist) 1) ; no prefix given | |
| 1035 | "") | |
| 1036 | ((eq (length nslist) 2) ; extract prefix | |
| 1037 | (cadr nslist))))) | |
| 91472578 | 1038 | (if (and ns (not (string= ns ""))) |
| 23f87bed MB |
1039 | (concat ns ":") |
| 1040 | ns))) | |
| 1041 | ||
| 1042 | (provide 'nnrss) | |
| 1043 | ||
| 23f87bed | 1044 | ;;; nnrss.el ends here |