129 lines
4.0 KiB
EmacsLisp
129 lines
4.0 KiB
EmacsLisp
;;; url-news.el --- News Uniform Resource Locator retrieval code -*- lexical-binding: t; -*-
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;; Copyright (C) 1996-1999, 2004-2024 Free Software Foundation, Inc.
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;; Keywords: comm, data, processes
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(require 'url-vars)
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(require 'url-util)
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(require 'url-parse)
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(require 'nntp)
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(autoload 'gnus-group-read-ephemeral-group "gnus-group")
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(defun url-news-open-host (host port user pass)
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(if (fboundp 'nnheader-init-server-buffer)
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(nnheader-init-server-buffer))
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(nntp-open-server host (list port))
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(if (and user pass)
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(progn
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(nntp-send-command "^.*\r?\n" "AUTHINFO USER" user)
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(nntp-send-command "^.*\r?\n" "AUTHINFO PASS" pass)
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(if (not (nntp-server-opened host))
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(display-warning 'url (format "NNTP authentication to `%s' as `%s' failed"
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host user))))))
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(defun url-news-fetch-message-id (host message-id)
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(let ((buf (generate-new-buffer " *url-news*")))
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(if (eq ?> (aref message-id (1- (length message-id))))
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nil
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(setq message-id (concat "<" message-id ">")))
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(if (cdr-safe (nntp-request-article message-id nil host buf))
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;; Successfully retrieved the article
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nil
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(with-current-buffer buf
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(insert "Content-type: text/html\n\n"
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"<html>\n"
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" <head>\n"
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" <title>Error</title>\n"
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" </head>\n"
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" <body>\n"
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" <div>\n"
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" <h1>Error requesting article...</h1>\n"
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" <p>\n"
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" The status message returned by the NNTP server was:"
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"<br><hr>\n"
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" <xmp>\n"
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(nntp-status-message)
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" </xmp>\n"
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" </p>\n"
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" <p>\n"
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" If you feel this is an error, M-x report-emacs-bug RET.\n"
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" </p>\n"
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" </div>\n"
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" </body>\n"
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"</html>\n"
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"<!-- Automatically generated by URL in Emacs " emacs-version " -->\n"
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)))
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buf))
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(defvar gnus-group-buffer)
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(defun url-news-fetch-newsgroup (newsgroup host)
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(if (string-match "^/+" newsgroup)
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(setq newsgroup (substring newsgroup (match-end 0))))
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(if (string-match "/+$" newsgroup)
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(setq newsgroup (substring newsgroup 0 (match-beginning 0))))
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;; This saves us from checking new news if Gnus is already running
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;; FIXME - is it relatively safe to use gnus-alive-p here? FIXME
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(if (or (not (get-buffer gnus-group-buffer))
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(with-current-buffer gnus-group-buffer
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(not (eq major-mode 'gnus-group-mode))))
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(gnus))
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(set-buffer gnus-group-buffer)
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(goto-char (point-min))
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(gnus-group-read-ephemeral-group newsgroup
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(list 'nntp host
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(list 'nntp-open-connection-function
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nntp-open-connection-function))
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nil
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(cons (current-buffer) 'browse)))
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;;;###autoload
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(defun url-news (url)
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;; Find a news reference
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(let* ((host (or (url-host url) url-news-server))
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(port (url-port url))
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;; (article-brackets nil)
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(buf nil)
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(article (url-unhex-string (url-filename url))))
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(url-news-open-host host port (url-user url) (url-password url))
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(cond
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((string-search "@" article) ; Its a specific article
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(setq buf (url-news-fetch-message-id host article)))
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((string= article "") ; List all newsgroups
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(gnus))
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(t ; Whole newsgroup
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(url-news-fetch-newsgroup article host)))
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buf))
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;;;###autoload
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(defun url-snews (url)
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(let ((nntp-open-connection-function (if (eq 'ssl url-gateway-method)
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'nntp-open-ssl-stream
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'nntp-open-tls-stream)))
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(url-news url)))
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(provide 'url-news)
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;;; url-news.el ends here
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