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

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

;; Copyright (C) 1996-1999, 2004-2014 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")

;; Unused.
;;; (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 feel this is an error, M-x report-emacs-bug RET.\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)

;;; url-news.el ends here
Commit	Line	Data
8c8b8430	1	;;; url-news.el --- News Uniform Resource Locator retrieval code
00eef4de	2
ba318903	3	;; Copyright (C) 1996-1999, 2004-2014 Free Software Foundation, Inc.
00eef4de	4
8c8b8430 SM	5	;; Keywords: comm, data, processes
8c8b8430 SM	6
00eef4de LH	7	;; This file is part of GNU Emacs.
00eef4de LH	8
4936186e	9	;; GNU Emacs is free software: you can redistribute it and/or modify
00eef4de	10	;; it under the terms of the GNU General Public License as published by
4936186e GM	11	;; the Free Software Foundation, either version 3 of the License, or
4936186e GM	12	;; (at your option) any later version.
00eef4de LH	13
	14	;; GNU Emacs is distributed in the hope that it will be useful,
	15	;; but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	;; GNU General Public License for more details.
	18
	19	;; You should have received a copy of the GNU General Public License
4936186e	20	;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
00eef4de LH	21
	22	;;; Code:
	23
8c8b8430 SM	24	(require 'url-vars)
	25	(require 'url-util)
	26	(require 'url-parse)
	27	(require 'nntp)
	28	(autoload 'url-warn "url")
	29	(autoload 'gnus-group-read-ephemeral-group "gnus-group")
8c8b8430	30
ed8be7ff GM	31	;; Unused.
	32	;;; (defgroup url-news nil
	33	;;; "News related options."
	34	;;; :group 'url)
8c8b8430 SM	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"
32544aa4	73	" If you feel this is an error, M-x report-emacs-bug RET.\n"
8c8b8430 SM	74	" </p>\n"
	75	" </div>\n"
	76	" </body>\n"
	77	"</html>\n"
	78	"<!-- Automatically generated by URL v" url-version " -->\n"
	79	)))
	80	buf))
	81
24030ea3 GM	82	(defvar gnus-group-buffer)
24030ea3 GM	83
8c8b8430	84	(defun url-news-fetch-newsgroup (newsgroup host)
8c8b8430 SM	85	(if (string-match "^/+" newsgroup)
	86	(setq newsgroup (substring newsgroup (match-end 0))))
	87	(if (string-match "/+$" newsgroup)
	88	(setq newsgroup (substring newsgroup 0 (match-beginning 0))))
	89
30bfc9ce	90	;; This saves us from checking new news if Gnus is already running
8c8b8430 SM	91	;; FIXME - is it relatively safe to use gnus-alive-p here? FIXME
8c8b8430 SM	92	(if (or (not (get-buffer gnus-group-buffer))
81cafdfe	93	(with-current-buffer gnus-group-buffer
8c8b8430 SM	94	(not (eq major-mode 'gnus-group-mode))))
	95	(gnus))
	96	(set-buffer gnus-group-buffer)
	97	(goto-char (point-min))
	98	(gnus-group-read-ephemeral-group newsgroup
	99	(list 'nntp host
d01b3550 GM	100	(list 'nntp-open-connection-function
d01b3550 GM	101	nntp-open-connection-function))
8c8b8430 SM	102	nil
8c8b8430 SM	103	(cons (current-buffer) 'browse)))
6a2f8c56	104
8c8b8430 SM	105	;;;###autoload
	106	(defun url-news (url)
	107	;; Find a news reference
	108	(let* ((host (or (url-host url) url-news-server))
	109	(port (url-port url))
	110	(article-brackets nil)
	111	(buf nil)
81cafdfe	112	(article (url-unhex-string (url-filename url))))
8c8b8430	113	(url-news-open-host host port (url-user url) (url-password url))
8c8b8430 SM	114	(cond
	115	((string-match "@" article) ; Its a specific article
	116	(setq buf (url-news-fetch-message-id host article)))
	117	((string= article "") ; List all newsgroups
	118	(gnus))
	119	(t ; Whole newsgroup
	120	(url-news-fetch-newsgroup article host)))
	121	buf))
	122
	123	;;;###autoload
	124	(defun url-snews (url)
24030ea3 GM	125	(let ((nntp-open-connection-function (if (eq 'ssl url-gateway-method)
	126	'nntp-open-ssl-stream
	127	'nntp-open-tls-stream)))
8c8b8430 SM	128	(url-news url)))
	129
	130	(provide 'url-news)
e5566bd5	131
00eef4de	132	;;; url-news.el ends here