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414 lines
13 KiB
EmacsLisp
414 lines
13 KiB
EmacsLisp
;;; mhspool.el --- MH folder access using NNTP for GNU Emacs
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;; Copyright (C) 1988, 1989, 1990 Free Software Foundation, Inc.
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;; Author: Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
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;; Maintainer: FSF
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;; Keywords: mail, news
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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 2, or (at your option)
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;; 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; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;; Commentary:
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;; This package enables you to read mail or articles in MH folders, or
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;; articles saved by GNUS. In any case, the file names of mail or
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;; articles must consist of only numeric letters.
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;; Before using this package, you have to create a server specific
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;; startup file according to the directory which you want to read. For
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;; example, if you want to read mail under the directory named
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;; `~/Mail', the file must be a file named `.newsrc-:Mail'. (There is
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;; no way to specify hierarchical directory now.) In this case, the
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;; name of the NNTP server passed to GNUS must be `:Mail'.
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;; Code:
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(require 'nntp)
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(defvar mhspool-list-directory-switches '("-R")
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"*Switches for `nntp-request-list' to pass to `ls' for gettting file lists.
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One entry should appear on one line. You may need to add `-1' option.")
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(defconst mhspool-version "MHSPOOL 1.5"
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"Version numbers of this version of MHSPOOL.")
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(defvar mhspool-spool-directory "~/Mail"
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"Private mail directory.")
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(defvar mhspool-current-directory nil
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"Current news group directory.")
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;;;
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;;; Replacement of Extended Command for retrieving many headers.
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;;;
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(defun mhspool-retrieve-headers (sequence)
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"Return list of article headers specified by SEQUENCE of article id.
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The format of list is
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`([NUMBER SUBJECT FROM XREF LINES DATE MESSAGE-ID REFERENCES] ...)'.
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Reader macros for the vector are defined as `nntp-header-FIELD'.
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Writer macros for the vector are defined as `nntp-set-header-FIELD'.
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News group must be selected before calling me."
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(save-excursion
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(set-buffer nntp-server-buffer)
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;;(erase-buffer)
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(let ((file nil)
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(number (length sequence))
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(count 0)
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(headers nil) ;Result list.
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(article 0)
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(subject nil)
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(message-id nil)
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(from nil)
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(xref nil)
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(lines 0)
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(date nil)
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(references nil))
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(while sequence
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;;(nntp-send-strings-to-server "HEAD" (car sequence))
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(setq article (car sequence))
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(setq file
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(concat mhspool-current-directory (prin1-to-string article)))
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(if (and (file-exists-p file)
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(not (file-directory-p file)))
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(progn
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(erase-buffer)
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(insert-file-contents file)
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;; Make message body invisible.
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(goto-char (point-min))
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(search-forward "\n\n" nil 'move)
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(narrow-to-region (point-min) (point))
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;; Fold continuation lines.
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(goto-char (point-min))
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(while (re-search-forward "\\(\r?\n[ \t]+\\)+" nil t)
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(replace-match " " t t))
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;; Make it possible to search for `\nFIELD'.
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(goto-char (point-min))
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(insert "\n")
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;; Extract From:
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(goto-char (point-min))
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(if (search-forward "\nFrom: " nil t)
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(setq from (buffer-substring
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(point)
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(save-excursion (end-of-line) (point))))
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(setq from "(Unknown User)"))
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;; Extract Subject:
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(goto-char (point-min))
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(if (search-forward "\nSubject: " nil t)
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(setq subject (buffer-substring
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(point)
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(save-excursion (end-of-line) (point))))
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(setq subject "(None)"))
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;; Extract Message-ID:
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(goto-char (point-min))
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(if (search-forward "\nMessage-ID: " nil t)
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(setq message-id (buffer-substring
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(point)
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(save-excursion (end-of-line) (point))))
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(setq message-id nil))
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;; Extract Date:
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(goto-char (point-min))
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(if (search-forward "\nDate: " nil t)
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(setq date (buffer-substring
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(point)
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(save-excursion (end-of-line) (point))))
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(setq date nil))
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;; Extract Lines:
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(goto-char (point-min))
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(if (search-forward "\nLines: " nil t)
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(setq lines (string-to-int
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(buffer-substring
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(point)
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(save-excursion (end-of-line) (point)))))
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(setq lines 0))
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;; Extract Xref:
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(goto-char (point-min))
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(if (search-forward "\nXref: " nil t)
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(setq xref (buffer-substring
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(point)
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(save-excursion (end-of-line) (point))))
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(setq xref nil))
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;; Extract References:
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;; If no References: field, use In-Reply-To: field instead.
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;; Suggested by tanaka@flab.fujitsu.co.jp (Hiroshi TANAKA).
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(goto-char (point-min))
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(if (or (search-forward "\nReferences: " nil t)
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(search-forward "\nIn-Reply-To: " nil t))
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(setq references (buffer-substring
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(point)
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(save-excursion (end-of-line) (point))))
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(setq references nil))
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(setq headers
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(cons (vector article subject from
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xref lines date
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message-id references) headers))
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))
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(setq sequence (cdr sequence))
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(setq count (1+ count))
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(and (numberp nntp-large-newsgroup)
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(> number nntp-large-newsgroup)
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(zerop (% count 20))
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(message "MHSPOOL: %d%% of headers received."
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(/ (* count 100) number)))
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)
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(and (numberp nntp-large-newsgroup)
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(> number nntp-large-newsgroup)
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(message "MHSPOOL: 100%% of headers received."))
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(nreverse headers)
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)))
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;;;
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;;; Replacement of NNTP Raw Interface.
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;;;
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(defun mhspool-open-server (host &optional service)
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"Open news server on HOST.
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If HOST is nil, use value of environment variable `NNTPSERVER'.
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If optional argument SERVICE is non-nil, open by the service name."
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(let ((host (or host (getenv "NNTPSERVER")))
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(status nil))
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;; Get directory name from HOST name.
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(if (string-match ":\\(.+\\)$" host)
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(progn
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(setq mhspool-spool-directory
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(file-name-as-directory
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(expand-file-name
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(substring host (match-beginning 1) (match-end 1))
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(expand-file-name "~/" nil))))
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(setq host (system-name)))
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(setq mhspool-spool-directory nil))
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(setq nntp-status-message-string "")
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(cond ((and (stringp host)
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(stringp mhspool-spool-directory)
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(file-directory-p mhspool-spool-directory)
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(string-equal host (system-name)))
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(setq status (mhspool-open-server-internal host service)))
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((string-equal host (system-name))
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(setq nntp-status-message-string
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(format "No such directory: %s. Goodbye."
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mhspool-spool-directory)))
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((null host)
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(setq nntp-status-message-string "NNTP server is not specified."))
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(t
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(setq nntp-status-message-string
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(format "MHSPOOL: cannot talk to %s." host)))
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)
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status
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))
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(defun mhspool-close-server ()
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"Close news server."
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(mhspool-close-server-internal))
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(fset 'mhspool-request-quit (symbol-function 'mhspool-close-server))
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(defun mhspool-server-opened ()
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"Return server process status, T or NIL.
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If the stream is opened, return T, otherwise return NIL."
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(and nntp-server-buffer
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(get-buffer nntp-server-buffer)))
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(defun mhspool-status-message ()
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"Return server status response as string."
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nntp-status-message-string
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)
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(defun mhspool-request-article (id)
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"Select article by message ID (or number)."
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(let ((file (concat mhspool-current-directory (prin1-to-string id))))
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(if (and (stringp file)
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(file-exists-p file)
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(not (file-directory-p file)))
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(save-excursion
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(mhspool-find-file file)))
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))
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(defun mhspool-request-body (id)
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"Select article body by message ID (or number)."
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(if (mhspool-request-article id)
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(save-excursion
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(set-buffer nntp-server-buffer)
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(goto-char (point-min))
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(if (search-forward "\n\n" nil t)
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(delete-region (point-min) (point)))
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t
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)
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))
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(defun mhspool-request-head (id)
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"Select article head by message ID (or number)."
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(if (mhspool-request-article id)
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(save-excursion
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(set-buffer nntp-server-buffer)
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(goto-char (point-min))
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(if (search-forward "\n\n" nil t)
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(delete-region (1- (point)) (point-max)))
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t
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)
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))
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(defun mhspool-request-stat (id)
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"Select article by message ID (or number)."
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(error "MHSPOOL: STAT is not implemented."))
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(defun mhspool-request-group (group)
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"Select news GROUP."
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(cond ((file-directory-p
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(mhspool-article-pathname group))
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;; Mail/NEWS.GROUP/N
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(setq mhspool-current-directory
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(mhspool-article-pathname group)))
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((file-directory-p
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(mhspool-article-pathname
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(mhspool-replace-chars-in-string group ?. ?/)))
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;; Mail/NEWS/GROUP/N
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(setq mhspool-current-directory
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(mhspool-article-pathname
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(mhspool-replace-chars-in-string group ?. ?/))))
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))
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(defun mhspool-request-list ()
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"List valid newsgoups."
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(save-excursion
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(let* ((newsgroup nil)
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(articles nil)
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(directory (file-name-as-directory
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(expand-file-name mhspool-spool-directory nil)))
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(folder-regexp (concat "^" (regexp-quote directory) "\\(.+\\):$"))
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(buffer (get-buffer-create " *GNUS file listing*")))
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(set-buffer nntp-server-buffer)
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(erase-buffer)
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(set-buffer buffer)
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(erase-buffer)
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(apply 'call-process
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"ls" nil t nil
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(append mhspool-list-directory-switches (list directory)))
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(goto-char (point-min))
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(while (re-search-forward folder-regexp nil t)
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(setq newsgroup
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(mhspool-replace-chars-in-string
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(buffer-substring (match-beginning 1) (match-end 1)) ?/ ?.))
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(setq articles nil)
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(forward-line 1) ;(beginning-of-line)
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;; Thank nobu@flab.fujitsu.junet for his bug fixes.
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(while (and (not (eobp))
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(not (looking-at "^$")))
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(if (looking-at "^[0-9]+$")
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(setq articles
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(cons (string-to-int
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(buffer-substring
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(match-beginning 0) (match-end 0)))
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articles)))
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(forward-line 1))
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(if articles
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(princ (format "%s %d %d n\n" newsgroup
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(apply (function max) articles)
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(apply (function min) articles))
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nntp-server-buffer))
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)
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(kill-buffer buffer)
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(set-buffer nntp-server-buffer)
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(buffer-size)
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)))
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(defun mhspool-request-last ()
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"Set current article pointer to the previous article in the current newsgroup."
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(error "MHSPOOL: LAST is not implemented."))
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(defun mhspool-request-next ()
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"Advance current article pointer."
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(error "MHSPOOL: NEXT is not implemented."))
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(defun mhspool-request-post ()
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"Post a new news in current buffer."
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(setq nntp-status-message-string "MHSPOOL: what do you mean post?")
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nil
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)
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;;;
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;;; Replacement of Low-Level Interface to NNTP Server.
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;;;
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(defun mhspool-open-server-internal (host &optional service)
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"Open connection to news server on HOST by SERVICE (default is nntp)."
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(save-excursion
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(if (not (string-equal host (system-name)))
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(error "MHSPOOL: cannot talk to %s." host))
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;; Initialize communication buffer.
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(setq nntp-server-buffer (get-buffer-create " *nntpd*"))
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(set-buffer nntp-server-buffer)
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(buffer-flush-undo (current-buffer))
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(erase-buffer)
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(kill-all-local-variables)
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(setq case-fold-search t) ;Should ignore case.
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(setq nntp-server-process nil)
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(setq nntp-server-name host)
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;; It is possible to change kanji-fileio-code in this hook.
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(run-hooks 'nntp-server-hook)
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t
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))
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(defun mhspool-close-server-internal ()
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"Close connection to news server."
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(if nntp-server-buffer
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(kill-buffer nntp-server-buffer))
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(setq nntp-server-buffer nil)
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(setq nntp-server-process nil))
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(defun mhspool-find-file (file)
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"Insert FILE in server buffer safely."
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(set-buffer nntp-server-buffer)
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(erase-buffer)
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(condition-case ()
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(progn
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(insert-file-contents file)
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(goto-char (point-min))
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;; If there is no body, `^L' appears at end of file. Special
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;; hack for MH folder.
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(and (search-forward "\n\n" nil t)
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(string-equal (buffer-substring (point) (point-max)) "\^L")
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(delete-char 1))
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t
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)
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(file-error nil)
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))
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(defun mhspool-article-pathname (group)
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"Make pathname for GROUP."
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(concat (file-name-as-directory mhspool-spool-directory) group "/"))
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(defun mhspool-replace-chars-in-string (string from to)
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"Replace characters in STRING from FROM to TO."
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(let ((string (substring string 0)) ;Copy string.
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(len (length string))
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(idx 0))
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;; Replace all occurence of FROM with TO.
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(while (< idx len)
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(if (= (aref string idx) from)
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(aset string idx to))
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(setq idx (1+ idx)))
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string
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))
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(provide 'mhspool)
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;;; mhspool.el ends here
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