[bpt/emacs.git] / lisp / url / url-news.el

;;; url-news.el --- News Uniform Resource Locator retrieval code

;; Copyright (C) 1996, 1997, 1998, 1999, 2004,
;;   2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.

;; Keywords: comm, data, processes

;; 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 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.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.

;;; Code:

(require 'url-vars)
(require 'url-util)
(require 'url-parse)
(require 'nntp)
(autoload 'url-warn "url")
(autoload 'gnus-group-read-ephemeral-group "gnus-group")

(defgroup url-news nil
  "News related options."
  :group 'url)

(defun url-news-open-host (host port user pass)
  (if (fboundp 'nnheader-init-server-buffer)
      (nnheader-init-server-buffer))
  (nntp-open-server host (list port))
  (if (and user pass)
      (progn
	(nntp-send-command "^.*\r?\n" "AUTHINFO USER" user)
	(nntp-send-command "^.*\r?\n" "AUTHINFO PASS" pass)
	(if (not (nntp-server-opened host))
	    (url-warn 'url (format "NNTP authentication to `%s' as `%s' failed"
				   host user))))))

(defun url-news-fetch-message-id (host message-id)
  (let ((buf (generate-new-buffer " *url-news*")))
    (if (eq ?> (aref message-id (1- (length message-id))))
	nil
      (setq message-id (concat "<" message-id ">")))
    (if (cdr-safe (nntp-request-article message-id nil host buf))
	;; Successfully retrieved the article
	nil
      (with-current-buffer buf
	(insert "Content-type: text/html\n\n"
		"<html>\n"
		" <head>\n"
		"  <title>Error</title>\n"
		" </head>\n"
		" <body>\n"
		"  <div>\n"
		"   <h1>Error requesting article...</h1>\n"
		"   <p>\n"
		"    The status message returned by the NNTP server was:"
		"<br><hr>\n"
		"    <xmp>\n"
		(nntp-status-message)
		"    </xmp>\n"
		"   </p>\n"
		"   <p>\n"
		"    If you If you feel this is an error, <a href=\""
		"mailto:" url-bug-address "\">send mail</a>\n"
		"   </p>\n"
		"  </div>\n"
		" </body>\n"
		"</html>\n"
		"<!-- Automatically generated by URL v" url-version " -->\n"
		)))
    buf))

(defvar gnus-group-buffer)

(defun url-news-fetch-newsgroup (newsgroup host)
  (if (string-match "^/+" newsgroup)
      (setq newsgroup (substring newsgroup (match-end 0))))
  (if (string-match "/+$" newsgroup)
      (setq newsgroup (substring newsgroup 0 (match-beginning 0))))

  ;; This saves us from checking new news if Gnus is already running
  ;; FIXME - is it relatively safe to use gnus-alive-p here? FIXME
  (if (or (not (get-buffer gnus-group-buffer))
	  (with-current-buffer gnus-group-buffer
	    (not (eq major-mode 'gnus-group-mode))))
      (gnus))
  (set-buffer gnus-group-buffer)
  (goto-char (point-min))
  (gnus-group-read-ephemeral-group newsgroup
				   (list 'nntp host
					 (list 'nntp-open-connection-function
					       nntp-open-connection-function))
				   nil
				   (cons (current-buffer) 'browse)))

;;;###autoload
(defun url-news (url)
  ;; Find a news reference
  (let* ((host (or (url-host url) url-news-server))
	 (port (url-port url))
	 (article-brackets nil)
	 (buf nil)
	 (article (url-unhex-string (url-filename url))))
    (url-news-open-host host port (url-user url) (url-password url))
    (cond
     ((string-match "@" article)	; Its a specific article
      (setq buf (url-news-fetch-message-id host article)))
     ((string= article "")		; List all newsgroups
      (gnus))
     (t					; Whole newsgroup
      (url-news-fetch-newsgroup article host)))
    buf))

;;;###autoload
(defun url-snews (url)
  (let ((nntp-open-connection-function (if (eq 'ssl url-gateway-method)
					   'nntp-open-ssl-stream
					 'nntp-open-tls-stream)))
    (url-news url)))

(provide 'url-news)

;; arch-tag: 8975be13-04e8-4d38-bfff-47918e3ad311
;;; url-news.el ends here
Commit	Line	Data
8c8b8430	1	;;; url-news.el --- News Uniform Resource Locator retrieval code
00eef4de	2
71ddfde5	3	;; Copyright (C) 1996, 1997, 1998, 1999, 2004,
114f9c96	4	;; 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
00eef4de	5
8c8b8430 SM	6	;; Keywords: comm, data, processes
8c8b8430 SM	7
00eef4de LH	8	;; This file is part of GNU Emacs.
00eef4de LH	9
4936186e	10	;; GNU Emacs is free software: you can redistribute it and/or modify
00eef4de	11	;; it under the terms of the GNU General Public License as published by
4936186e GM	12	;; the Free Software Foundation, either version 3 of the License, or
4936186e GM	13	;; (at your option) any later version.
00eef4de LH	14
	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.
	19
	20	;; You should have received a copy of the GNU General Public License
4936186e	21	;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
00eef4de LH	22
	23	;;; Code:
	24
8c8b8430 SM	25	(require 'url-vars)
	26	(require 'url-util)
	27	(require 'url-parse)
	28	(require 'nntp)
	29	(autoload 'url-warn "url")
	30	(autoload 'gnus-group-read-ephemeral-group "gnus-group")
8c8b8430 SM	31
8c8b8430 SM	32	(defgroup url-news nil
6a2f8c56	33	"News related options."
8c8b8430 SM	34	:group 'url)
	35
	36	(defun url-news-open-host (host port user pass)
	37	(if (fboundp 'nnheader-init-server-buffer)
	38	(nnheader-init-server-buffer))
60b5eb78	39	(nntp-open-server host (list port))
8c8b8430 SM	40	(if (and user pass)
	41	(progn
	42	(nntp-send-command "^.*\r?\n" "AUTHINFO USER" user)
	43	(nntp-send-command "^.*\r?\n" "AUTHINFO PASS" pass)
	44	(if (not (nntp-server-opened host))
	45	(url-warn 'url (format "NNTP authentication to `%s' as `%s' failed"
	46	host user))))))
	47
	48	(defun url-news-fetch-message-id (host message-id)
	49	(let ((buf (generate-new-buffer " url-news")))
	50	(if (eq ?> (aref message-id (1- (length message-id))))
	51	nil
	52	(setq message-id (concat "<" message-id ">")))
	53	(if (cdr-safe (nntp-request-article message-id nil host buf))
	54	;; Successfully retrieved the article
	55	nil
81cafdfe	56	(with-current-buffer buf
8c8b8430 SM	57	(insert "Content-type: text/html\n\n"
	58	"<html>\n"
	59	" <head>\n"
	60	" <title>Error</title>\n"
	61	" </head>\n"
	62	" <body>\n"
	63	" <div>\n"
	64	" <h1>Error requesting article...</h1>\n"
	65	" <p>\n"
	66	" The status message returned by the NNTP server was:"
	67	"<br><hr>\n"
	68	" <xmp>\n"
	69	(nntp-status-message)
	70	" </xmp>\n"
	71	" </p>\n"
	72	" <p>\n"
	73	" If you If you feel this is an error, <a href=\""
30bfc9ce	74	"mailto:" url-bug-address "\">send mail</a>\n"
8c8b8430 SM	75	" </p>\n"
	76	" </div>\n"
	77	" </body>\n"
	78	"</html>\n"
	79	"<!-- Automatically generated by URL v" url-version " -->\n"
	80	)))
	81	buf))
	82
24030ea3 GM	83	(defvar gnus-group-buffer)
24030ea3 GM	84
8c8b8430	85	(defun url-news-fetch-newsgroup (newsgroup host)
8c8b8430 SM	86	(if (string-match "^/+" newsgroup)
	87	(setq newsgroup (substring newsgroup (match-end 0))))
	88	(if (string-match "/+$" newsgroup)
	89	(setq newsgroup (substring newsgroup 0 (match-beginning 0))))
	90
30bfc9ce	91	;; This saves us from checking new news if Gnus is already running
8c8b8430 SM	92	;; FIXME - is it relatively safe to use gnus-alive-p here? FIXME
8c8b8430 SM	93	(if (or (not (get-buffer gnus-group-buffer))
81cafdfe	94	(with-current-buffer gnus-group-buffer
8c8b8430 SM	95	(not (eq major-mode 'gnus-group-mode))))
	96	(gnus))
	97	(set-buffer gnus-group-buffer)
	98	(goto-char (point-min))
	99	(gnus-group-read-ephemeral-group newsgroup
	100	(list 'nntp host
d01b3550 GM	101	(list 'nntp-open-connection-function
d01b3550 GM	102	nntp-open-connection-function))
8c8b8430 SM	103	nil
8c8b8430 SM	104	(cons (current-buffer) 'browse)))
6a2f8c56	105
8c8b8430 SM	106	;;;###autoload
	107	(defun url-news (url)
	108	;; Find a news reference
	109	(let* ((host (or (url-host url) url-news-server))
	110	(port (url-port url))
	111	(article-brackets nil)
	112	(buf nil)
81cafdfe	113	(article (url-unhex-string (url-filename url))))
8c8b8430	114	(url-news-open-host host port (url-user url) (url-password url))
8c8b8430 SM	115	(cond
	116	((string-match "@" article) ; Its a specific article
	117	(setq buf (url-news-fetch-message-id host article)))
	118	((string= article "") ; List all newsgroups
	119	(gnus))
	120	(t ; Whole newsgroup
	121	(url-news-fetch-newsgroup article host)))
	122	buf))
	123
	124	;;;###autoload
	125	(defun url-snews (url)
24030ea3 GM	126	(let ((nntp-open-connection-function (if (eq 'ssl url-gateway-method)
	127	'nntp-open-ssl-stream
	128	'nntp-open-tls-stream)))
8c8b8430 SM	129	(url-news url)))
	130
	131	(provide 'url-news)
e5566bd5	132
81cafdfe	133	;; arch-tag: 8975be13-04e8-4d38-bfff-47918e3ad311
00eef4de	134	;;; url-news.el ends here