Some web sites have an RDF Site Summary (RSS). RSS is a format for summarizing headlines from news related sites (such as BBC or CNN). But basically anything list-like can be presented as an RSS feed: weblogs, changelogs or recent changes to a wiki (e.g., http://cliki.net/site/recent-changes).
RSS has a quite regular and nice interface, and it’s possible to get the information Gnus needs to keep groups updated.
Note: you had better use Emacs which supports the
system because RSS uses UTF-8 for encoding non-ASCII
text by default. It is also used by default for non-ASCII
Use G R from the group buffer to subscribe to a feed—you will be prompted for the location, the title and the description of the feed. The title, which allows any characters, will be used for the group name and the name of the group data file. The description can be omitted.
An easy way to get started with
nnrss is to say something like
the following in the group buffer: B nnrss RET RET y, then
subscribe to groups.
nnrss back end saves the group data file in
nnrss-directory (see below) for each
nnrss group. File
names containing non-ASCII characters will be encoded by the
coding system specified with the
variable or other. Also See Non-ASCII Group Names, for more
nnrss back end generates ‘multipart/alternative’
MIME articles in which each contains a ‘text/plain’ part
and a ‘text/html’ part.
You can also use the following commands to import and export your subscriptions from a file in OPML format (Outline Processor Markup Language).
Prompt for an OPML file, and subscribe to each feed in the file.
Write your current RSS subscriptions to a buffer in OPML format.
nnrss variables can be altered:
The directory where
nnrss stores its files. The default is
The coding system used when reading and writing the
data files. The default is the value of
mm-universal-coding-system (which defaults to
in Emacs or
escape-quoted in XEmacs).
Some feeds update constantly article fields during their publications,
e.g., to indicate the number of comments. 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. The default is
If you set
nnrss will read
the feeds from local files in
nnrss-directory. You can use
nnrss-generate-download-script to generate a
download script using
The following code may be helpful, if you want to show the description in the summary buffer.
(add-to-list 'nnmail-extra-headers nnrss-description-field) (setq gnus-summary-line-format "%U%R%z%I%(%[%4L: %-15,15f%]%) %s%uX\n") (defun gnus-user-format-function-X (header) (let ((descr (assq nnrss-description-field (mail-header-extra header)))) (if descr (concat "\n\t" (cdr descr)) "")))
The following code may be useful to open an nnrss url directly from the summary buffer.
(require 'browse-url) (defun browse-nnrss-url (arg) (interactive "p") (let ((url (assq nnrss-url-field (mail-header-extra (gnus-data-header (assq (gnus-summary-article-number) gnus-newsgroup-data)))))) (if url (progn (browse-url (cdr url)) (gnus-summary-mark-as-read-forward 1)) (gnus-summary-scroll-up arg)))) (eval-after-load "gnus" #'(define-key gnus-summary-mode-map (kbd "<RET>") 'browse-nnrss-url)) (add-to-list 'nnmail-extra-headers nnrss-url-field)
Even if you have added ‘text/html’ to the
mm-discouraged-alternatives variable (see Display Customization in The Emacs MIME
Manual) since you don’t want to see HTML parts, it might be
more useful especially in
nnrss groups to display
‘text/html’ parts. Here’s an example of setting
mm-discouraged-alternatives as a group parameter (see Group Parameters) in order to display ‘text/html’ parts only in
;; Set the default value of
mm-discouraged-alternatives. (eval-after-load "gnus-sum" '(add-to-list 'gnus-newsgroup-variables '(mm-discouraged-alternatives . '("text/html" "image/.*")))) ;; Display ‘text/html’ parts in
nnrssgroups. (add-to-list 'gnus-parameters '("\\`nnrss:" (mm-discouraged-alternatives nil)))