[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 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, 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; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

;;; 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,
12dc447f	4	;; 2005, 2006, 2007, 2008 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.
	9
	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
8c0ee52a	12	;; the Free Software Foundation; either version 3, or (at your option)
00eef4de LH	13	;; any later version.
	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
	21	;; along with GNU Emacs; see the file COPYING. If not, write to the
4fc5845f LK	22	;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
4fc5845f LK	23	;; Boston, MA 02110-1301, USA.
00eef4de LH	24
	25	;;; Code:
	26
8c8b8430 SM	27	(require 'url-vars)
	28	(require 'url-util)
	29	(require 'url-parse)
	30	(require 'nntp)
	31	(autoload 'url-warn "url")
	32	(autoload 'gnus-group-read-ephemeral-group "gnus-group")
8c8b8430 SM	33
8c8b8430 SM	34	(defgroup url-news nil
6a2f8c56	35	"News related options."
8c8b8430 SM	36	:group 'url)
	37
	38	(defun url-news-open-host (host port user pass)
	39	(if (fboundp 'nnheader-init-server-buffer)
	40	(nnheader-init-server-buffer))
60b5eb78	41	(nntp-open-server host (list port))
8c8b8430 SM	42	(if (and user pass)
	43	(progn
	44	(nntp-send-command "^.*\r?\n" "AUTHINFO USER" user)
	45	(nntp-send-command "^.*\r?\n" "AUTHINFO PASS" pass)
	46	(if (not (nntp-server-opened host))
	47	(url-warn 'url (format "NNTP authentication to `%s' as `%s' failed"
	48	host user))))))
	49
	50	(defun url-news-fetch-message-id (host message-id)
	51	(let ((buf (generate-new-buffer " url-news")))
	52	(if (eq ?> (aref message-id (1- (length message-id))))
	53	nil
	54	(setq message-id (concat "<" message-id ">")))
	55	(if (cdr-safe (nntp-request-article message-id nil host buf))
	56	;; Successfully retrieved the article
	57	nil
81cafdfe	58	(with-current-buffer buf
8c8b8430 SM	59	(insert "Content-type: text/html\n\n"
	60	"<html>\n"
	61	" <head>\n"
	62	" <title>Error</title>\n"
	63	" </head>\n"
	64	" <body>\n"
	65	" <div>\n"
	66	" <h1>Error requesting article...</h1>\n"
	67	" <p>\n"
	68	" The status message returned by the NNTP server was:"
	69	"<br><hr>\n"
	70	" <xmp>\n"
	71	(nntp-status-message)
	72	" </xmp>\n"
	73	" </p>\n"
	74	" <p>\n"
	75	" If you If you feel this is an error, <a href=\""
30bfc9ce	76	"mailto:" url-bug-address "\">send mail</a>\n"
8c8b8430 SM	77	" </p>\n"
	78	" </div>\n"
	79	" </body>\n"
	80	"</html>\n"
	81	"<!-- Automatically generated by URL v" url-version " -->\n"
	82	)))
	83	buf))
	84
24030ea3 GM	85	(defvar gnus-group-buffer)
24030ea3 GM	86
8c8b8430	87	(defun url-news-fetch-newsgroup (newsgroup host)
8c8b8430 SM	88	(if (string-match "^/+" newsgroup)
	89	(setq newsgroup (substring newsgroup (match-end 0))))
	90	(if (string-match "/+$" newsgroup)
	91	(setq newsgroup (substring newsgroup 0 (match-beginning 0))))
	92
30bfc9ce	93	;; This saves us from checking new news if Gnus is already running
8c8b8430 SM	94	;; FIXME - is it relatively safe to use gnus-alive-p here? FIXME
8c8b8430 SM	95	(if (or (not (get-buffer gnus-group-buffer))
81cafdfe	96	(with-current-buffer gnus-group-buffer
8c8b8430 SM	97	(not (eq major-mode 'gnus-group-mode))))
	98	(gnus))
	99	(set-buffer gnus-group-buffer)
	100	(goto-char (point-min))
	101	(gnus-group-read-ephemeral-group newsgroup
	102	(list 'nntp host
d01b3550 GM	103	(list 'nntp-open-connection-function
d01b3550 GM	104	nntp-open-connection-function))
8c8b8430 SM	105	nil
8c8b8430 SM	106	(cons (current-buffer) 'browse)))
6a2f8c56	107
8c8b8430 SM	108	;;;###autoload
	109	(defun url-news (url)
	110	;; Find a news reference
	111	(let* ((host (or (url-host url) url-news-server))
	112	(port (url-port url))
	113	(article-brackets nil)
	114	(buf nil)
81cafdfe	115	(article (url-unhex-string (url-filename url))))
8c8b8430	116	(url-news-open-host host port (url-user url) (url-password url))
8c8b8430 SM	117	(cond
	118	((string-match "@" article) ; Its a specific article
	119	(setq buf (url-news-fetch-message-id host article)))
	120	((string= article "") ; List all newsgroups
	121	(gnus))
	122	(t ; Whole newsgroup
	123	(url-news-fetch-newsgroup article host)))
	124	buf))
	125
	126	;;;###autoload
	127	(defun url-snews (url)
24030ea3 GM	128	(let ((nntp-open-connection-function (if (eq 'ssl url-gateway-method)
	129	'nntp-open-ssl-stream
	130	'nntp-open-tls-stream)))
8c8b8430 SM	131	(url-news url)))
	132
	133	(provide 'url-news)
e5566bd5	134
81cafdfe	135	;; arch-tag: 8975be13-04e8-4d38-bfff-47918e3ad311
00eef4de	136	;;; url-news.el ends here