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-;;; Spool access using NNTP for GNU Emacs
-;; Copyright (C) 1988, 1989 Fujitsu Laboratories LTD.
-;; Copyright (C) 1988, 1989, 1990 Masanobu UMEDA
-;; $Header: nnspool.el,v 1.10 90/03/23 13:25:25 umerin Locked $
-
-;; This file is part of GNU Emacs.
-
-;; GNU Emacs is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY. No author or distributor
-;; accepts responsibility to anyone for the consequences of using it
-;; or for whether it serves any particular purpose or works at all,
-;; unless he says so in writing. Refer to the GNU Emacs General Public
-;; License for full details.
-
-;; Everyone is granted permission to copy, modify and redistribute
-;; GNU Emacs, but only under the conditions described in the
-;; GNU Emacs General Public License. A copy of this license is
-;; supposed to have been given to you along with GNU Emacs so you
-;; can know your rights and responsibilities. It should be in a
-;; file named COPYING. Among other things, the copyright notice
-;; and this notice must be preserved on all copies.
-
-(provide 'nnspool)
-(require 'nntp)
-
-(defvar nnspool-inews-program news-inews-program
- "*Program to post news.")
-
-(defvar nnspool-inews-switches '("-h")
- "*Switches for nnspool-request-post to pass to `inews' for posting news.")
-
-(defvar nnspool-spool-directory news-path
- "*Local news spool directory.")
-
-(defvar nnspool-active-file "/usr/lib/news/active"
- "*Local news active file.")
-
-(defvar nnspool-history-file "/usr/lib/news/history"
- "*Local news history file.")
-
-
-
-(defconst nnspool-version "NNSPOOL 1.10"
- "Version numbers of this version of NNSPOOL.")
-
-(defvar nnspool-current-directory nil
- "Current news group directory.")
-
-;;;
-;;; Replacement of Extended Command for retrieving many headers.
-;;;
-
-(defun nnspool-retrieve-headers (sequence)
- "Return list of article headers specified by SEQUENCE of article id.
-The format of list is
- `([NUMBER SUBJECT FROM XREF LINES DATE MESSAGE-ID REFERENCES] ...)'.
-Reader macros for the vector are defined as `nntp-header-FIELD'.
-Writer macros for the vector are defined as `nntp-set-header-FIELD'.
-News group must be selected before calling me."
- (save-excursion
- (set-buffer nntp-server-buffer)
- ;;(erase-buffer)
- (let ((file nil)
- (number (length sequence))
- (count 0)
- (headers nil) ;Result list.
- (article 0)
- (subject nil)
- (message-id nil)
- (from nil)
- (xref nil)
- (lines 0)
- (date nil)
- (references nil))
- (while sequence
- ;;(nntp-send-strings-to-server "HEAD" (car sequence))
- (setq article (car sequence))
- (setq file
- (concat nnspool-current-directory (prin1-to-string article)))
- (if (and (file-exists-p file)
- (not (file-directory-p file)))
- (progn
- (erase-buffer)
- (insert-file-contents file)
- ;; Make message body invisible.
- (goto-char (point-min))
- (search-forward "\n\n" nil 'move)
- (narrow-to-region (point-min) (point))
- ;; Fold continuation lines.
- (goto-char (point-min))
- (while (re-search-forward "\\(\r?\n[ \t]+\\)+" nil t)
- (replace-match " " t t))
- ;; Make it possible to search for `\nFIELD'.
- (goto-char (point-min))
- (insert "\n")
- ;; Extract From:
- (goto-char (point-min))
- (if (search-forward "\nFrom: " nil t)
- (setq from (buffer-substring
- (point)
- (save-excursion (end-of-line) (point))))
- (setq from "(Unknown User)"))
- ;; Extract Subject:
- (goto-char (point-min))
- (if (search-forward "\nSubject: " nil t)
- (setq subject (buffer-substring
- (point)
- (save-excursion (end-of-line) (point))))
- (setq subject "(None)"))
- ;; Extract Message-ID:
- (goto-char (point-min))
- (if (search-forward "\nMessage-ID: " nil t)
- (setq message-id (buffer-substring
- (point)
- (save-excursion (end-of-line) (point))))
- (setq message-id nil))
- ;; Extract Date:
- (goto-char (point-min))
- (if (search-forward "\nDate: " nil t)
- (setq date (buffer-substring
- (point)
- (save-excursion (end-of-line) (point))))
- (setq date nil))
- ;; Extract Lines:
- (goto-char (point-min))
- (if (search-forward "\nLines: " nil t)
- (setq lines (string-to-int
- (buffer-substring
- (point)
- (save-excursion (end-of-line) (point)))))
- (setq lines 0))
- ;; Extract Xref:
- (goto-char (point-min))
- (if (search-forward "\nXref: " nil t)
- (setq xref (buffer-substring
- (point)
- (save-excursion (end-of-line) (point))))
- (setq xref nil))
- ;; Extract References:
- (goto-char (point-min))
- (if (search-forward "\nReferences: " nil t)
- (setq references (buffer-substring
- (point)
- (save-excursion (end-of-line) (point))))
- (setq references nil))
- (setq headers
- (cons (vector article subject from
- xref lines date
- message-id references) headers))
- ))
- (setq sequence (cdr sequence))
- (setq count (1+ count))
- (and (numberp nntp-large-newsgroup)
- (> number nntp-large-newsgroup)
- (zerop (% count 20))
- (message "NNSPOOL: %d%% of headers received."
- (/ (* count 100) number)))
- )
- (and (numberp nntp-large-newsgroup)
- (> number nntp-large-newsgroup)
- (message "NNSPOOL: 100%% of headers received."))
- (nreverse headers)
- )))
-
-
-;;;
-;;; Replacement of NNTP Raw Interface.
-;;;
-
-(defun nnspool-open-server (host &optional service)
- "Open news server on HOST.
-If HOST is nil, use value of environment variable `NNTPSERVER'.
-If optional argument SERVICE is non-nil, open by the service name."
- (let ((host (or host (getenv "NNTPSERVER")))
- (status nil))
- (setq nntp-status-message-string "")
- (cond ((and (file-directory-p nnspool-spool-directory)
- (file-exists-p nnspool-active-file)
- (string-equal host (system-name)))
- (setq status (nnspool-open-server-internal host service)))
- ((string-equal host (system-name))
- (setq nntp-status-message-string
- (format "%s has no news spool. Goodbye." host)))
- ((null host)
- (setq nntp-status-message-string "NNTP server is not specified."))
- (t
- (setq nntp-status-message-string
- (format "NNSPOOL: cannot talk to %s." host)))
- )
- status
- ))
-
-(defun nnspool-close-server ()
- "Close news server."
- (nnspool-close-server-internal))
-
-(fset 'nnspool-request-quit (symbol-function 'nnspool-close-server))
-
-(defun nnspool-server-opened ()
- "Return server process status, T or NIL.
-If the stream is opened, return T, otherwise return NIL."
- (and nntp-server-buffer
- (get-buffer nntp-server-buffer)))
-
-(defun nnspool-status-message ()
- "Return server status response as string."
- nntp-status-message-string
- )
-
-(defun nnspool-request-article (id)
- "Select article by message ID (or number)."
- (let ((file (if (stringp id)
- (nnspool-find-article-by-message-id id)
- (concat nnspool-current-directory (prin1-to-string id)))))
- (if (and (stringp file)
- (file-exists-p file)
- (not (file-directory-p file)))
- (save-excursion
- (nnspool-find-file file)))
- ))
-
-(defun nnspool-request-body (id)
- "Select article body by message ID (or number)."
- (if (nnspool-request-article id)
- (save-excursion
- (set-buffer nntp-server-buffer)
- (goto-char (point-min))
- (if (search-forward "\n\n" nil t)
- (delete-region (point-min) (point)))
- t
- )
- ))
-
-(defun nnspool-request-head (id)
- "Select article head by message ID (or number)."
- (if (nnspool-request-article id)
- (save-excursion
- (set-buffer nntp-server-buffer)
- (goto-char (point-min))
- (if (search-forward "\n\n" nil t)
- (delete-region (1- (point)) (point-max)))
- t
- )
- ))
-
-(defun nnspool-request-stat (id)
- "Select article by message ID (or number)."
- (error "NNSPOOL: STAT is not implemented."))
-
-(defun nnspool-request-group (group)
- "Select news GROUP."
- (let ((pathname (nnspool-article-pathname
- (nnspool-replace-chars-in-string group ?. ?/))))
- (if (file-directory-p pathname)
- (setq nnspool-current-directory pathname))
- ))
-
-(defun nnspool-request-list ()
- "List valid newsgoups."
- (save-excursion
- (nnspool-find-file nnspool-active-file)))
-
-(defun nnspool-request-last ()
- "Set current article pointer to the previous article in the current news group."
- (error "NNSPOOL: LAST is not implemented."))
-
-(defun nnspool-request-next ()
- "Advance current article pointer."
- (error "NNSPOOL: NEXT is not implemented."))
-
-(defun nnspool-request-post ()
- "Post a new news in current buffer."
- (save-excursion
- ;; We have to work in the server buffer because of NEmacs hack.
- (copy-to-buffer nntp-server-buffer (point-min) (point-max))
- (set-buffer nntp-server-buffer)
- (apply 'call-process-region
- (point-min) (point-max)
- nnspool-inews-program 'delete t nil nnspool-inews-switches)
- (prog1
- (or (zerop (buffer-size))
- ;; If inews returns strings, it must be error message
- ;; unless SPOOLNEWS is defined.
- ;; This condition is very weak, but there is no good rule
- ;; identifying errors when SPOOLNEWS is defined.
- ;; Suggested by ohm@kaba.junet.
- (string-match "spooled" (buffer-string)))
- ;; Make status message by unfolding lines.
- (subst-char-in-region (point-min) (point-max) ?\n ?\\ 'noundo)
- (setq nntp-status-message-string (buffer-string))
- (erase-buffer))
- ))
-
-
-;;;
-;;; Replacement of Low-Level Interface to NNTP Server.
-;;;
-
-(defun nnspool-open-server-internal (host &optional service)
- "Open connection to news server on HOST by SERVICE (default is nntp)."
- (save-excursion
- (if (not (string-equal host (system-name)))
- (error "NNSPOOL: cannot talk to %s." host))
- ;; Initialize communication buffer.
- (setq nntp-server-buffer (get-buffer-create " *nntpd*"))
- (set-buffer nntp-server-buffer)
- (buffer-flush-undo (current-buffer))
- (erase-buffer)
- (kill-all-local-variables)
- (setq case-fold-search t) ;Should ignore case.
- (setq nntp-server-process nil)
- (setq nntp-server-name host)
- ;; It is possible to change kanji-fileio-code in this hook.
- (run-hooks 'nntp-server-hook)
- t
- ))
-
-(defun nnspool-close-server-internal ()
- "Close connection to news server."
- (if (get-file-buffer nnspool-history-file)
- (kill-buffer (get-file-buffer nnspool-history-file)))
- (if nntp-server-buffer
- (kill-buffer nntp-server-buffer))
- (setq nntp-server-buffer nil)
- (setq nntp-server-process nil))
-
-(defun nnspool-find-article-by-message-id (id)
- "Return full pathname of an article identified by message-ID."
- (save-excursion
- (let ((buffer (get-file-buffer nnspool-history-file)))
- (if buffer
- (set-buffer buffer)
- ;; Finding history file may take lots of time.
- (message "Reading history file...")
- (set-buffer (find-file-noselect nnspool-history-file))
- (message "Reading history file... done")))
- ;; Search from end of the file. I think this is much faster than
- ;; do from the beginning of the file.
- (goto-char (point-max))
- (if (re-search-backward
- (concat "^" (regexp-quote id)
- "[ \t].*[ \t]\\([^ \t/]+\\)/\\([0-9]+\\)[ \t]*$") nil t)
- (let ((group (buffer-substring (match-beginning 1) (match-end 1)))
- (number (buffer-substring (match-beginning 2) (match-end 2))))
- (concat (nnspool-article-pathname
- (nnspool-replace-chars-in-string group ?. ?/))
- number))
- )))
-
-(defun nnspool-find-file (file)
- "Insert FILE in server buffer safely."
- (set-buffer nntp-server-buffer)
- (erase-buffer)
- (condition-case ()
- (progn (insert-file-contents file) t)
- (file-error nil)
- ))
-
-(defun nnspool-article-pathname (group)
- "Make pathname for GROUP."
- (concat (file-name-as-directory nnspool-spool-directory) group "/"))
-
-(defun nnspool-replace-chars-in-string (string from to)
- "Replace characters in STRING from FROM to TO."
- (let ((string (substring string 0)) ;Copy string.
- (len (length string))
- (idx 0))
- ;; Replace all occurence of FROM with TO.
- (while (< idx len)
- (if (= (aref string idx) from)
- (aset string idx to))
- (setq idx (1+ idx)))
- string
- ))
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