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

;;; url-news.el --- News Uniform Resource Locator retrieval code
;; Keywords: comm, data, processes

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Copyright (c) 1993 - 1996 by William M. Perry <wmperry@cs.indiana.edu>
;;; Copyright (c) 1996 - 1999 Free Software Foundation, Inc.
;;;
;;; 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 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.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(require 'url-vars)
(require 'url-util)
(require 'url-parse)
(require 'nntp)
(autoload 'url-warn "url")
(autoload 'gnus-group-read-ephemeral-group "gnus-group")
(eval-when-compile (require 'cl))

(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 (string-to-int 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
      (save-excursion
	(set-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 me mail</a>\n"
		"   </p>\n"
		"  </div>\n"
		" </body>\n"
		"</html>\n"
		"<!-- Automatically generated by URL v" url-version " -->\n"
		)))
    buf))

(defun url-news-fetch-newsgroup (newsgroup host)
  (declare (special gnus-group-buffer))
  (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))
	  (save-excursion
	    (set-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
					 '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-filename url)))
    (url-news-open-host host port (url-user url) (url-password url))
    (setq article (url-unhex-string article))
    (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 'nntp-open-ssl-stream))
    (url-news url)))

(provide 'url-news)

;;; arch-tag: 8975be13-04e8-4d38-bfff-47918e3ad311
Commit	Line	Data
8c8b8430	1	;;; url-news.el --- News Uniform Resource Locator retrieval code
8c8b8430 SM	2	;; Keywords: comm, data, processes
	3
	4	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
	5	;;; Copyright (c) 1993 - 1996 by William M. Perry <wmperry@cs.indiana.edu>
	6	;;; Copyright (c) 1996 - 1999 Free Software Foundation, Inc.
	7	;;;
	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
	12	;;; the Free Software Foundation; either version 2, or (at your option)
	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
	22	;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	23	;;; Boston, MA 02111-1307, USA.
	24	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
	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")
	31	(eval-when-compile (require 'cl))
	32
	33	(defgroup url-news nil
	34	"News related options"
	35	:group 'url)
	36
	37	(defun url-news-open-host (host port user pass)
	38	(if (fboundp 'nnheader-init-server-buffer)
	39	(nnheader-init-server-buffer))
	40	(nntp-open-server host (list (string-to-int port)))
	41	(if (and user pass)
	42	(progn
	43	(nntp-send-command "^.*\r?\n" "AUTHINFO USER" user)
	44	(nntp-send-command "^.*\r?\n" "AUTHINFO PASS" pass)
	45	(if (not (nntp-server-opened host))
	46	(url-warn 'url (format "NNTP authentication to `%s' as `%s' failed"
	47	host user))))))
	48
	49	(defun url-news-fetch-message-id (host message-id)
	50	(let ((buf (generate-new-buffer " url-news")))
	51	(if (eq ?> (aref message-id (1- (length message-id))))
	52	nil
	53	(setq message-id (concat "<" message-id ">")))
	54	(if (cdr-safe (nntp-request-article message-id nil host buf))
	55	;; Successfully retrieved the article
	56	nil
	57	(save-excursion
	58	(set-buffer buf)
	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=\""
76	"mailto:" url-bug-address "\">send me mail</a>\n"
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
85	(defun url-news-fetch-newsgroup (newsgroup host)
86	(declare (special gnus-group-buffer))
87	(if (string-match "^/+" newsgroup)
88	(setq newsgroup (substring newsgroup (match-end 0))))
89	(if (string-match "/+$" newsgroup)
90	(setq newsgroup (substring newsgroup 0 (match-beginning 0))))
91
92	;; This saves us from checking new news if GNUS is already running
93	;; FIXME - is it relatively safe to use gnus-alive-p here? FIXME
94	(if (or (not (get-buffer gnus-group-buffer))
95	(save-excursion
96	(set-buffer gnus-group-buffer)
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
103	'nntp-open-connection-function
104	nntp-open-connection-function)
105	nil
106	(cons (current-buffer) 'browse)))
107
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)
115	(article (url-filename url)))
116	(url-news-open-host host port (url-user url) (url-password url))
117	(setq article (url-unhex-string article))
118	(cond
119	((string-match "@" article) ; Its a specific article
120	(setq buf (url-news-fetch-message-id host article)))
121	((string= article "") ; List all newsgroups
122	(gnus))
123	(t ; Whole newsgroup
124	(url-news-fetch-newsgroup article host)))
125	buf))
126
127	;;;###autoload
128	(defun url-snews (url)
129	(let ((nntp-open-connection-function 'nntp-open-ssl-stream))
130	(url-news url)))
131
132	(provide 'url-news)
e5566bd5 MB	133
e5566bd5 MB	134	;;; arch-tag: 8975be13-04e8-4d38-bfff-47918e3ad311