root/trunk/lisp/url/url-news.el

Revision 4220, 4.2 kB (checked in by miyoshi, 9 months ago)

Sync up with Emacs22.2.

Line 
1 ;;; url-news.el --- News Uniform Resource Locator retrieval code
2
3 ;; Copyright (C) 1996, 1997, 1998, 1999, 2004,
4 ;;   2005, 2006, 2007, 2008 Free Software Foundation, Inc.
5
6 ;; Keywords: comm, data, processes
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 3, 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., 51 Franklin Street, Fifth Floor,
23 ;; Boston, MA 02110-1301, USA.
24
25 ;;; Code:
26
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")
33 (eval-when-compile (require 'cl))
34
35 (defgroup url-news nil
36   "News related options."
37   :group 'url)
38
39 (defun url-news-open-host (host port user pass)
40   (if (fboundp 'nnheader-init-server-buffer)
41       (nnheader-init-server-buffer))
42   (nntp-open-server host (list port))
43   (if (and user pass)
44       (progn
45         (nntp-send-command "^.*\r?\n" "AUTHINFO USER" user)
46         (nntp-send-command "^.*\r?\n" "AUTHINFO PASS" pass)
47         (if (not (nntp-server-opened host))
48             (url-warn 'url (format "NNTP authentication to `%s' as `%s' failed"
49                                    host user))))))
50
51 (defun url-news-fetch-message-id (host message-id)
52   (let ((buf (generate-new-buffer " *url-news*")))
53     (if (eq ?> (aref message-id (1- (length message-id))))
54         nil
55       (setq message-id (concat "<" message-id ">")))
56     (if (cdr-safe (nntp-request-article message-id nil host buf))
57         ;; Successfully retrieved the article
58         nil
59       (with-current-buffer buf
60         (insert "Content-type: text/html\n\n"
61                 "<html>\n"
62                 " <head>\n"
63                 "  <title>Error</title>\n"
64                 " </head>\n"
65                 " <body>\n"
66                 "  <div>\n"
67                 "   <h1>Error requesting article...</h1>\n"
68                 "   <p>\n"
69                 "    The status message returned by the NNTP server was:"
70                 "<br><hr>\n"
71                 "    <xmp>\n"
72                 (nntp-status-message)
73                 "    </xmp>\n"
74                 "   </p>\n"
75                 "   <p>\n"
76                 "    If you If you feel this is an error, <a href=\""
77                 "mailto:" url-bug-address "\">send mail</a>\n"
78                 "   </p>\n"
79                 "  </div>\n"
80                 " </body>\n"
81                 "</html>\n"
82                 "<!-- Automatically generated by URL v" url-version " -->\n"
83                 )))
84     buf))
85
86 (defun url-news-fetch-newsgroup (newsgroup host)
87   (declare (special gnus-group-buffer))
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
93   ;; This saves us from checking new news if Gnus is already running
94   ;; FIXME - is it relatively safe to use gnus-alive-p here? FIXME
95   (if (or (not (get-buffer gnus-group-buffer))
96           (with-current-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                                          (list '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-unhex-string (url-filename url))))
116     (url-news-open-host host port (url-user url) (url-password url))
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)
128   (let ((nntp-open-connection-function (if (eq 'ssl url-gateway-method)
129                                            'nntp-open-ssl-stream
130                                          'nntp-open-tls-stream)))
131     (url-news url)))
132
133 (provide 'url-news)
134
135 ;; arch-tag: 8975be13-04e8-4d38-bfff-47918e3ad311
136 ;;; url-news.el ends here
137
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