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- ;;; url-news.el --- News Uniform Resource Locator retrieval code
- ;; Author: wmperry
- ;; Created: 1997/10/17 14:08:05
- ;; Version: 1.12
- ;; Keywords: comm, data, processes
-
- ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
- ;;; Copyright (c) 1993-1996 by William M. Perry <wmperry@cs.indiana.edu>
- ;;; Copyright (c) 1996, 1997 Free Software Foundation, Inc.
- ;;;
- ;;; This file is not part of GNU Emacs, but the same permissions apply.
- ;;;
- ;;; 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-parse)
-
- (defgroup url-news nil
- "News related options"
- :group 'url)
-
- (defcustom url-news-use-article-mode nil
- "*Whether to use Gnus' article mode for displaying news articles."
- :type 'boolean
- :group 'url-news)
-
- (defun url-format-news ()
- (url-clear-tmp-buffer)
- (insert "HTTP/1.0 200 Retrieval OK\r\n"
- (save-excursion
- (set-buffer nntp-server-buffer)
- (buffer-string)))
- (url-parse-mime-headers)
- (let* ((from (cdr (assoc "from" url-current-mime-headers)))
- (qfrom (if from (url-insert-entities-in-string from) nil))
- (subj (cdr (assoc "subject" url-current-mime-headers)))
- (qsubj (if subj (url-insert-entities-in-string subj) nil))
- (org (cdr (assoc "organization" url-current-mime-headers)))
- (qorg (if org (url-insert-entities-in-string org) nil))
- (typ (or (cdr (assoc "content-type" url-current-mime-headers))
- "text/plain"))
- (inhibit-read-only t)
- (qgrps (mapcar 'car
- (url-split
- (url-insert-entities-in-string
- (or (cdr (assoc "newsgroups"
- url-current-mime-headers))
- ""))
- "[ \t\n,]+")))
- (qrefs (delete ""
- (mapcar
- 'url-insert-entities-in-string
- (mapcar 'car
- (url-split
- (or (cdr (assoc "references"
- url-current-mime-headers))
- "")
- "[ \t,\n<>]+")))))
- (date (cdr (assoc "date" url-current-mime-headers))))
- (if (or (not (string-match "text/" typ))
- (string-match "text/html" typ))
- nil ; Let natural content-type take over
- (if (and (fboundp 'gnus-article-mode)
- url-news-use-article-mode)
- (progn
- (kill-buffer (current-buffer))
- (set-buffer (get-buffer-create "Emacs/W3 News"))
- (erase-buffer)
- (insert
- (save-excursion
- (set-buffer nntp-server-buffer)
- (save-restriction
- (widen)
- (buffer-string))))
- (let ((gnus-article-buffer (current-buffer))
- (gnus-article-current (cons "url"
- (car (cdr (current-time))))))
- (gnus-article-mode)
- (run-hooks 'gnus-article-display-hook))
- (goto-char (point-min))
- (display-buffer (current-buffer)))
- (insert "<html>\n"
- " <head>\n"
- " <title>" qsubj "</title>\n"
- " <link rev=\"made\" href=\"mailto:" qfrom "\">\n"
- " </head>\n"
- " <body>\n"
- " <div>\n"
- " <h1 align=center>" qsubj "</h1>\n"
- " <p role=\"headers\">\n"
- " <b>From</b>: " qfrom "<br>\n"
- " <b>Newsgroups</b>: "
- (mapconcat
- (function
- (lambda (grp)
- (concat "<a href=\"" grp "\">" grp "</a>"))) qgrps ", ")
- "<br>\n"
- (if org
- (concat
- " <b>Organization</b>: <i> " qorg "</i> <br>\n")
- "")
- " <b>Date</b>: <date> " date "</date> <br>\n"
- " </p> <hr>\n"
- (if (null qrefs)
- ""
- (concat
- " <p>References\n"
- " <ol>\n"
- (mapconcat
- (function
- (lambda (ref)
- (concat " <li> <a href=\"" ref "\"> "
- ref "</a></li>\n")))
- qrefs "")
- " </ol>\n"
- " </p>\n"
- " <hr>\n"))
- " <ul plain>\n"
- " <li><a href=\"newspost:disfunctional\"> "
- "Post to this group </a></li>\n"
- " <li><a href=\"mailto:" qfrom "\"> Reply to " qfrom
- "</a></li>\n"
- " </ul>\n"
- " <hr>"
- " <pre>\n")
- (let ((s (buffer-substring (point) (point-max))))
- (delete-region (point) (point-max))
- (insert (url-insert-entities-in-string s)))
- (goto-char (point-max))
- (setq url-current-mime-type "text/html"
- url-current-mime-viewer (mm-mime-info url-current-mime-type nil 5))
- (let ((x (assoc "content-type" url-current-mime-headers)))
- (if x
- (setcdr x "text/html")
- (setq url-current-mime-headers (cons (cons "content-type"
- "text/html")
- url-current-mime-headers))))
- (insert "\n"
- " </pre>\n"
- " </div>\n"
- " </body>\n"
- "</html>\n"
- "<!-- Automatically generated by URL/" url-version
- "-->")))))
-
- (defun url-check-gnus-version ()
- (require 'nntp)
- (condition-case ()
- (require 'gnus)
- (error (setq gnus-version "GNUS not found")))
- (if (or (not (boundp 'gnus-version))
- (string-match "v5.[.0-9]+$" gnus-version)
- (string-match "Red" gnus-version)
- (string-match "Quassia" gnus-version))
- nil
- (url-warn 'url (concat
- "The version of GNUS found on this system is too old and does\n"
- "not support the necessary functionality for the URL package.\n"
- "Please upgrade to version 5.x of GNUS. This is bundled by\n"
- "default with Emacs 19.30 and XEmacs 19.14 and later.\n\n"
- "This version of GNUS is: " gnus-version "\n"))
- (fset 'url-news 'url-news-version-too-old))
- (fset 'url-check-gnus-version 'ignore))
-
- (defun url-news-version-too-old (article)
- (set-buffer (get-buffer-create url-working-buffer))
- (setq url-current-mime-headers '(("content-type" . "text/html"))
- url-current-mime-type "text/html")
- (insert "<html>\n"
- " <head>\n"
- " <title>News Error</title>\n"
- " </head>\n"
- " <body>\n"
- " <h1>News Error - too old</h1>\n"
- " <p>\n"
- " The version of GNUS found on this system is too old and does\n"
- " not support the necessary functionality for the URL package.\n"
- " Please upgrade to version 5.x of GNUS. This is bundled by\n"
- " default with Emacs 19.30 and XEmacs 19.14 and later.\n\n"
- " This version of GNUS is: " gnus-version "\n"
- " </p>\n"
- " </body>\n"
- "</html>\n"))
-
- (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-article-number (newsgroup article)
- (nntp-request-group newsgroup)
- (nntp-request-article article))
-
- (defun url-news-fetch-message-id (host port message-id)
- (if (eq ?> (aref message-id (1- (length message-id))))
- nil
- (setq message-id (concat "<" message-id ">")))
- (if (nntp-request-article message-id)
- (url-format-news)
- (set-buffer (get-buffer-create url-working-buffer))
- (setq url-current-can-be-cached nil)
- (insert "<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"
- )))
-
- (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 a bogus 'Untitled' buffer by Emacs-W3
- (kill-buffer url-working-buffer)
-
- ;; This saves us from checking new news if GNUS is already running
- (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)
- nil
- (cons (current-buffer) 'browse)))
-
- (defun url-news (article)
- ;; Find a news reference
- (url-check-gnus-version)
- (let* ((urlobj (url-generic-parse-url article))
- (host (or (url-host urlobj) url-news-server))
- (port (or (url-port urlobj)
- (cdr-safe (assoc "news" url-default-ports))))
- (article-brackets nil)
- (article (url-filename urlobj)))
- (url-news-open-host host port (url-user urlobj) (url-password urlobj))
- (cond
- ((string-match "@" article) ; Its a specific article
- (url-news-fetch-message-id host port article))
- ((string= article "") ; List all newsgroups
- (gnus)
- (kill-buffer url-working-buffer))
- (t ; Whole newsgroup
- (url-news-fetch-newsgroup article host)))))
-
- (defun url-nntp (url)
- ;; Find a news reference
- (url-check-gnus-version)
- (let* ((urlobj (url-generic-parse-url url))
- (host (or (url-host urlobj) url-news-server))
- (port (or (url-port urlobj)
- (cdr-safe (assoc "nntp" url-default-ports))))
- (article-brackets nil)
- (article (url-filename urlobj)))
- (url-news-open-host host port (url-user urlobj) (url-password urlobj))
- (cond
- ((string-match "@" article) ; Its a specific article
- (url-news-fetch-message-id host port article))
- ((string-match "/\\([0-9]+\\)$" article)
- (url-news-fetch-article-number (substring article 0
- (match-beginning 0))
- (match-string 1 article)))
-
- ((string= article "") ; List all newsgroups
- (gnus)
- (kill-buffer url-working-buffer))
- (t ; Whole newsgroup
- (url-news-fetch-newsgroup article)))))
-
- (provide 'url-news)
-