;;; nnrss.el --- interfacing with RSS
-;; Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
+
+;; Copyright (C) 2001-2011 Free Software Foundation, Inc.
;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
;; Keywords: RSS
;; This file is part of GNU Emacs.
-;; GNU Emacs is free software; you can redistribute it and/or modify
-;; it under the terms of the GNU General Public License as published
-;; by the Free Software Foundation; either version 2, or (at your
-;; option) any later version.
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
-;; GNU Emacs is distributed in the hope that it will be useful, but
-;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-;; General Public License for more details.
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
+;; For Emacs <22.2 and XEmacs.
+(eval-and-compile
+ (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
+
(eval-when-compile (require 'cl))
(require 'gnus)
(require 'time-date)
(require 'rfc2231)
(require 'mm-url)
+(require 'rfc2047)
+(require 'mml)
(eval-when-compile
(ignore-errors
- (require 'xml)))
+ (require 'xml)))
(eval '(require 'xml))
(nnoo-declare nnrss)
(defvoo nnrss-directory (nnheader-concat gnus-directory "rss/")
"Where nnrss will save its files.")
+(defvoo nnrss-ignore-article-fields '(slash:comments)
+ "*List of fields that should be ignored when comparing RSS articles.
+Some RSS feeds update article fields during their lives, e.g. to
+indicate the number of comments or the number of times the
+articles have been seen. However, if there is a difference
+between the local article and the distant one, the latter is
+considered to be new. To avoid this and discard some fields, set
+this variable to the list of fields to be ignored.")
+
;; (group max rss-url)
(defvoo nnrss-server-data nil)
(defvoo nnrss-group-max 0)
(defvoo nnrss-group-min 1)
(defvoo nnrss-group nil)
-(defvoo nnrss-group-hashtb nil)
+(defvoo nnrss-group-hashtb (make-hash-table :test 'equal))
(defvoo nnrss-status-string "")
(defconst nnrss-version "nnrss 1.0")
(defvar nnrss-group-alist '()
"List of RSS addresses.")
-(defvar nnrss-use-local nil)
+(defvar nnrss-use-local nil
+ "If non-nil nnrss will read the feeds from local files in nnrss-directory.")
(defvar nnrss-description-field 'X-Gnus-Description
"Field name used for DESCRIPTION.
(defvar nnrss-content-function nil
"A function which is called in `nnrss-request-article'.
The arguments are (ENTRY GROUP ARTICLE).
-ENTRY is the record of the current headline. GROUP is the group name.
+ENTRY is the record of the current headline. GROUP is the group name.
ARTICLE is the article number of the current headline.")
+(defvar nnrss-file-coding-system mm-universal-coding-system
+ "*Coding system used when reading and writing files.
+If you run Gnus with various versions of Emacsen, the value of this
+variable should be the coding system that all those Emacsen support.
+Note that you have to regenerate all the nnrss groups if you change
+the value. Moreover, you should be patient even if you are made to
+read the same articles twice, that arises for the difference of the
+versions of xml.el.")
+
+(defvar nnrss-compatible-encoding-alist
+ (delq nil (mapcar (lambda (elem)
+ (if (and (mm-coding-system-p (car elem))
+ (mm-coding-system-p (cdr elem)))
+ elem))
+ mm-charset-override-alist))
+ "Alist of encodings and those supersets.
+The cdr of each element is used to decode data if it is available when
+the car is what the data specify as the encoding. Or, the car is used
+for decoding when the cdr that the data specify is not available.")
+
(nnoo-define-basics nnrss)
;;; Interface functions
+(defsubst nnrss-format-string (string)
+ (gnus-replace-in-string string " *\n *" " "))
+
+(defun nnrss-decode-group-name (group)
+ (if (and group (mm-coding-system-p 'utf-8))
+ (setq group (mm-decode-coding-string group 'utf-8))
+ group))
+
(deffoo nnrss-retrieve-headers (articles &optional group server fetch-old)
+ (setq group (nnrss-decode-group-name group))
(nnrss-possibly-change-group group server)
(let (e)
- (save-excursion
- (set-buffer nntp-server-buffer)
+ (with-current-buffer nntp-server-buffer
(erase-buffer)
(dolist (article articles)
(if (setq e (assq article nnrss-group-data))
(insert (number-to-string (car e)) "\t" ;; number
- (if (nth 3 e)
- (nnrss-format-string (nth 3 e)) "")
- "\t" ;; subject
- (if (nth 4 e)
- (nnrss-format-string (nth 4 e))
- "(nobody)")
- "\t" ;;from
+ ;; subject
+ (or (nth 3 e) "")
+ "\t"
+ ;; from
+ (or (nth 4 e) "(nobody)")
+ "\t"
+ ;; date
(or (nth 5 e) "")
- "\t" ;; date
+ "\t"
+ ;; id
(format "<%d@%s.nnrss>" (car e) group)
- "\t" ;; id
- "\t" ;; refs
- "-1" "\t" ;; chars
- "-1" "\t" ;; lines
- "" "\t" ;; Xref
+ "\t"
+ ;; refs
+ "\t"
+ ;; chars
+ "-1" "\t"
+ ;; lines
+ "-1" "\t"
+ ;; Xref
+ "" "\t"
(if (and (nth 6 e)
(memq nnrss-description-field
nnmail-extra-headers))
"\n")))))
'nov)
-(deffoo nnrss-request-group (group &optional server dont-check)
+(deffoo nnrss-request-group (group &optional server dont-check info)
+ (setq group (nnrss-decode-group-name group))
+ (nnheader-message 6 "nnrss: Requesting %s..." group)
(nnrss-possibly-change-group group server)
- (if dont-check
- t
- (nnrss-check-group group server)
- (nnheader-report 'nnrss "Opened group %s" group)
- (nnheader-insert
- "211 %d %d %d %s\n" nnrss-group-max nnrss-group-min nnrss-group-max
- (prin1-to-string group)
- t)))
+ (prog1
+ (if dont-check
+ t
+ (nnrss-check-group group server)
+ (nnheader-report 'nnrss "Opened group %s" group)
+ (nnheader-insert
+ "211 %d %d %d %s\n" nnrss-group-max nnrss-group-min nnrss-group-max
+ (prin1-to-string group)
+ t))
+ (nnheader-message 6 "nnrss: Requesting %s...done" group)))
(deffoo nnrss-close-group (group &optional server)
t)
(deffoo nnrss-request-article (article &optional group server buffer)
+ (setq group (nnrss-decode-group-name group))
+ (when (stringp article)
+ (setq article (if (string-match "\\`<\\([0-9]+\\)@" article)
+ (string-to-number (match-string 1 article))
+ 0)))
(nnrss-possibly-change-group group server)
(let ((e (assq article nnrss-group-data))
(nntp-server-buffer (or buffer nntp-server-buffer))
post err)
(when e
- (catch 'error
- (with-current-buffer nntp-server-buffer
- (erase-buffer)
- (goto-char (point-min))
- (insert "Mime-Version: 1.0\nContent-Type: text/html\n")
- (if group
- (insert "Newsgroups: " group "\n"))
- (if (nth 3 e)
- (insert "Subject: " (nnrss-format-string (nth 3 e)) "\n"))
- (if (nth 4 e)
- (insert "From: " (nnrss-format-string (nth 4 e)) "\n"))
- (if (nth 5 e)
- (insert "Date: " (nnrss-format-string (nth 5 e)) "\n"))
- (insert "Message-ID: " (format "<%d@%s.nnrss>" (car e) group) "\n")
- (insert "\n")
- (if (nth 6 e)
- (let ((point (point)))
- (insert (nnrss-string-as-multibyte (nth 6 e)))
- (goto-char point)
- (while (re-search-forward "\n" nil t)
- (replace-match " "))
- (goto-char (point-max))
- (insert "\n\n")
- (fill-region point (point))))
- (if (nth 2 e)
- (insert "<p><a href='" (nth 2 e) "'>link</a></p>\n"))
- (if nnrss-content-function
- (funcall nnrss-content-function e group article)))))
+ (with-current-buffer nntp-server-buffer
+ (erase-buffer)
+ (if group
+ (insert "Newsgroups: " group "\n"))
+ (if (nth 3 e)
+ (insert "Subject: " (nth 3 e) "\n"))
+ (if (nth 4 e)
+ (insert "From: " (nth 4 e) "\n"))
+ (if (nth 5 e)
+ (insert "Date: " (nnrss-format-string (nth 5 e)) "\n"))
+ (let ((header (buffer-string))
+ (text (nth 6 e))
+ (link (nth 2 e))
+ (enclosure (nth 7 e))
+ (comments (nth 8 e))
+ (rfc2047-header-encoding-alist
+ (if (mm-coding-system-p 'utf-8)
+ (cons '("Newsgroups" . utf-8)
+ rfc2047-header-encoding-alist)
+ rfc2047-header-encoding-alist))
+ rfc2047-encode-encoded-words body fn)
+ (when (or text link enclosure comments)
+ (insert "\n")
+ (insert "<#multipart type=alternative>\n"
+ "<#part type=\"text/plain\">\n")
+ (setq body (point))
+ (when text
+ (insert text)
+ (goto-char body)
+ (while (re-search-forward "\n+" nil t)
+ (replace-match " "))
+ (goto-char body)
+ ;; See `nnrss-check-group', which inserts "<br /><br />".
+ (when (search-forward "<br /><br />" nil t)
+ (if (eobp)
+ (replace-match "\n")
+ (replace-match "\n\n")))
+ (unless (eobp)
+ (let ((fill-column (default-value 'fill-column))
+ (window (get-buffer-window nntp-server-buffer)))
+ (when window
+ (setq fill-column
+ (max 1 (/ (* (window-width window) 7) 8))))
+ (fill-region (point) (point-max))
+ (goto-char (point-max))
+ ;; XEmacs version of `fill-region' inserts newline.
+ (unless (bolp)
+ (insert "\n"))))
+ (when (or link enclosure)
+ (insert "\n")))
+ (when link
+ (insert link "\n"))
+ (when enclosure
+ (insert (car enclosure) " "
+ (nth 2 enclosure) " "
+ (nth 3 enclosure) "\n"))
+ (when comments
+ (insert comments "\n"))
+ (setq body (buffer-substring body (point)))
+ (insert "<#/part>\n"
+ "<#part type=\"text/html\">\n"
+ "<html><head></head><body>\n")
+ (when text
+ (insert text "\n"))
+ (when link
+ (insert "<p><a href=\"" link "\">link</a></p>\n"))
+ (when enclosure
+ (insert "<p><a href=\"" (car enclosure) "\">"
+ (cadr enclosure) "</a> " (nth 2 enclosure)
+ " " (nth 3 enclosure) "</p>\n"))
+ (when comments
+ (insert "<p><a href=\"" comments "\">comments</a></p>\n"))
+ (insert "</body></html>\n"
+ "<#/part>\n"
+ "<#/multipart>\n"))
+ (condition-case nil
+ ;; Allow `mml-to-mime' to generate MIME article without
+ ;; making inquiry to a user for unknown encoding.
+ (let ((mml-confirmation-set
+ (cons 'unknown-encoding mml-confirmation-set)))
+ (mml-to-mime))
+ (error
+ (erase-buffer)
+ (insert header
+ "Content-Type: text/plain; charset=gnus-decoded\n"
+ "Content-Transfer-Encoding: 8bit\n\n"
+ body)
+ (nnheader-message
+ 3 "Warning - there might be invalid characters"))))
+ (goto-char (point-min))
+ (search-forward "\n\n")
+ (forward-line -1)
+ (insert (format "Message-ID: <%d@%s.nnrss>\n"
+ (car e)
+ (let ((rfc2047-encoding-type 'mime)
+ rfc2047-encode-max-chars)
+ (rfc2047-encode-string
+ (gnus-replace-in-string group "[\t\n ]+" "_")))))
+ (when nnrss-content-function
+ (funcall nnrss-content-function e group article))))
(cond
(err
(nnheader-report 'nnrss err))
;; we return the article number.
(cons nnrss-group (car e))))))
-(deffoo nnrss-request-list (&optional server)
- (nnrss-possibly-change-group nil server)
- (nnrss-generate-active)
- t)
-
(deffoo nnrss-open-server (server &optional defs connectionless)
(nnrss-read-server-data server)
(nnoo-change-server 'nnrss server defs)
(deffoo nnrss-request-expire-articles
(articles group &optional server force)
+ (setq group (nnrss-decode-group-name group))
(nnrss-possibly-change-group group server)
(let (e days not-expirable changed)
(dolist (art articles)
not-expirable))
(deffoo nnrss-request-delete-group (group &optional force server)
+ (setq group (nnrss-decode-group-name group))
(nnrss-possibly-change-group group server)
+ (let (elem)
+ ;; There may be two or more entries in `nnrss-group-alist' since
+ ;; this function didn't delete them formerly.
+ (while (setq elem (assoc group nnrss-group-alist))
+ (setq nnrss-group-alist (delq elem nnrss-group-alist))))
(setq nnrss-server-data
(delq (assoc group nnrss-server-data) nnrss-server-data))
(nnrss-save-server-data server)
- (let ((file (expand-file-name
- (nnrss-translate-file-chars
- (concat group (and server
- (not (equal server ""))
- "-")
- server ".el")) nnrss-directory)))
- (ignore-errors
- &n
projects / gnus / blobdiff