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495 lines
16 KiB
EmacsLisp
495 lines
16 KiB
EmacsLisp
;;; nnspool.el --- spool access for GNU Emacs
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;; Copyright (C) 1988,89,90,93,94,95 Free Software Foundation, Inc.
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;; Author: Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
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;; Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
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;; Keywords: 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 the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;;; Code:
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(require 'nnheader)
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(require 'nntp)
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(require 'timezone)
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(defvar nnspool-inews-program news-inews-program
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"Program to post news.
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This is most commonly `inews' or `injnews'.")
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(defvar nnspool-inews-switches '("-h")
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"Switches for nnspool-request-post to pass to `inews' for posting news.
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If you are using Cnews, you probably should set this variable to nil.")
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(defvar nnspool-spool-directory news-path
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"Local news spool directory.")
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(defvar nnspool-nov-directory (concat nnspool-spool-directory "over.view/")
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"Local news nov directory.")
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(defvar nnspool-lib-dir "/usr/lib/news/"
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"Where the local news library files are stored.")
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(defvar nnspool-active-file (concat nnspool-lib-dir "active")
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"Local news active file.")
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(defvar nnspool-newsgroups-file (concat nnspool-lib-dir "newsgroups")
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"Local news newsgroups file.")
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(defvar nnspool-distributions-file (concat nnspool-lib-dir "distributions")
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"Local news distributions file.")
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(defvar nnspool-history-file (concat nnspool-lib-dir "history")
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"Local news history file.")
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(defvar nnspool-active-times-file (concat nnspool-lib-dir "active.times")
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"Local news active date file.")
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(defvar nnspool-large-newsgroup 50
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"The number of the articles which indicates a large newsgroup.
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If the number of the articles is greater than the value, verbose
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messages will be shown to indicate the current status.")
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(defvar nnspool-nov-is-evil nil
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"Non-nil means that nnspool will never return NOV lines instead of headers.")
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(defconst nnspool-sift-nov-with-sed nil
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"If non-nil, use sed to get the relevant portion from the overview file.
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If nil, nnspool will load the entire file into a buffer and process it
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there.")
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(defconst nnspool-version "nnspool 2.0"
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"Version numbers of this version of NNSPOOL.")
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(defvar nnspool-current-directory nil
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"Current news group directory.")
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(defvar nnspool-current-group nil)
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(defvar nnspool-status-string "")
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(defvar nnspool-current-server nil)
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(defvar nnspool-server-alist nil)
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(defvar nnspool-server-variables
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(list
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(list 'nnspool-inews-program nnspool-inews-program)
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(list 'nnspool-inews-switches nnspool-inews-switches)
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(list 'nnspool-spool-directory nnspool-spool-directory)
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(list 'nnspool-nov-directory nnspool-nov-directory)
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(list 'nnspool-lib-dir nnspool-lib-dir)
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(list 'nnspool-active-file nnspool-active-file)
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(list 'nnspool-newsgroups-file nnspool-newsgroups-file)
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(list 'nnspool-distributions-file nnspool-distributions-file)
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(list 'nnspool-history-file nnspool-history-file)
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(list 'nnspool-active-times-file nnspool-active-times-file)
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(list 'nnspool-large-newsgroup nnspool-large-newsgroup)
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(list 'nnspool-nov-is-evil nnspool-nov-is-evil)
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(list 'nnspool-sift-nov-with-sed nnspool-sift-nov-with-sed)
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'(nnspool-current-directory nil)
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'(nnspool-current-group nil)
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'(nnspool-status-string "")))
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;;; Interface functions.
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(defun nnspool-retrieve-headers (sequence &optional newsgroup server)
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"Retrieve the headers for the articles in SEQUENCE.
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Newsgroup must be selected before calling this function."
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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* ((number (length sequence))
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(count 0)
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(do-message (and (numberp nnspool-large-newsgroup)
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(> number nnspool-large-newsgroup)))
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file beg article)
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(if (not (nnspool-possibly-change-directory newsgroup))
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()
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(if (and (numberp (car sequence))
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(nnspool-retrieve-headers-with-nov sequence))
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'nov
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(while sequence
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(setq article (car sequence))
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(if (stringp article)
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(progn
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(setq file (nnspool-find-article-by-message-id article))
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(setq article 0))
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(setq file (concat nnspool-current-directory
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(int-to-string article))))
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(and file (file-exists-p file)
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(progn
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(insert (format "221 %d Article retrieved.\n" article))
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(setq beg (point))
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(nnheader-insert-head file)
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(goto-char beg)
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(search-forward "\n\n" nil t)
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(forward-char -1)
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(insert ".\n")
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(delete-region (point) (point-max))))
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(setq sequence (cdr sequence))
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(and do-message
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(zerop (% (setq count (1+ count)) 20))
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(message "NNSPOOL: Receiving headers... %d%%"
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(/ (* count 100) number))))
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(and do-message (message "NNSPOOL: Receiving headers...done"))
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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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'headers)))))
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(defun nnspool-open-server (server &optional defs)
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(nnheader-init-server-buffer)
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(if (equal server nnspool-current-server)
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t
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(if nnspool-current-server
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(setq nnspool-server-alist
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(cons (list nnspool-current-server
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(nnheader-save-variables nnspool-server-variables))
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nnspool-server-alist)))
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(let ((state (assoc server nnspool-server-alist)))
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(if state
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(progn
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(nnheader-restore-variables (nth 1 state))
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(setq nnspool-server-alist (delq state nnspool-server-alist)))
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(nnheader-set-init-variables nnspool-server-variables defs)))
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(setq nnspool-current-server server)))
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(defun nnspool-close-server (&optional server)
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t)
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(defun nnspool-server-opened (&optional server)
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(and (equal server nnspool-current-server)
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nntp-server-buffer
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(buffer-name nntp-server-buffer)))
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(defun nnspool-status-message (&optional server)
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"Return server status response as string."
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nnspool-status-string)
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(defun nnspool-request-article (id &optional newsgroup server buffer)
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"Select article by message ID (or number)."
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(nnspool-possibly-change-directory newsgroup)
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(let ((file (if (stringp id)
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(nnspool-find-article-by-message-id id)
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(concat nnspool-current-directory (prin1-to-string id))))
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(nntp-server-buffer (or buffer nntp-server-buffer)))
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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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(nnspool-find-file file)))))
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(defun nnspool-request-body (id &optional newsgroup server)
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"Select article body by message ID (or number)."
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(nnspool-possibly-change-directory newsgroup)
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(if (nnspool-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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(defun nnspool-request-head (id &optional newsgroup server)
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"Select article head by message ID (or number)."
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(nnspool-possibly-change-directory newsgroup)
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(if (nnspool-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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(defun nnspool-request-group (group &optional server dont-check)
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"Select news GROUP."
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(let ((pathname (nnspool-article-pathname
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(nnspool-replace-chars-in-string group ?. ?/)))
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dir)
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(if (not (file-directory-p pathname))
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(progn
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(setq nnspool-status-string
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"Invalid group name (no such directory)")
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nil)
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(setq nnspool-current-directory pathname)
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(setq nnspool-status-string "")
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(if (not dont-check)
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(progn
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(setq dir (directory-files pathname nil "^[0-9]+$" t))
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;; yes, completely empty spool directories *are* possible
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;; Fix by Sudish Joseph <joseph@cis.ohio-state.edu>
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(and dir
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(setq dir
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(sort
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(mapcar
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(function
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(lambda (name)
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(string-to-int name)))
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dir)
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'<)))
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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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(if dir
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(insert
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(format "211 %d %d %d %s\n" (length dir) (car dir)
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(progn (while (cdr dir) (setq dir (cdr dir)))
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(car dir))
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group))
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(insert (format "211 0 0 0 %s\n" group))))))
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t)))
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(defun nnspool-close-group (group &optional server)
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t)
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(defun nnspool-request-list (&optional server)
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"List active newsgroups."
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(save-excursion
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(nnspool-find-file nnspool-active-file)))
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(defun nnspool-request-list-newsgroups (&optional server)
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"List newsgroups (defined in NNTP2)."
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(save-excursion
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(nnspool-find-file nnspool-newsgroups-file)))
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(defun nnspool-request-list-distributions (&optional server)
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"List distributions (defined in NNTP2)."
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(save-excursion
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(nnspool-find-file nnspool-distributions-file)))
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;; Suggested by Hallvard B Furuseth <h.b.furuseth@usit.uio.no>.
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(defun nnspool-request-newgroups (date &optional server)
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"List groups created after DATE."
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(if (nnspool-find-file nnspool-active-times-file)
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(save-excursion
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;; Find the last valid line.
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(goto-char (point-max))
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(while (and (not (looking-at
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"\\([^ ]+\\) +\\([0-9]+\\)[0-9][0-9][0-9] "))
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(zerop (forward-line -1))))
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(let ((seconds (nnspool-seconds-since-epoch date))
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groups)
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;; Go through lines and add the latest groups to a list.
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(while (and (looking-at "\\([^ ]+\\) +[0-9]+ ")
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(progn
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;; We insert a .0 to make the list reader
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;; interpret the number as a float. It is far
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;; too big to be stored in a lisp integer.
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(goto-char (1- (match-end 0)))
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(insert ".0")
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(> (progn
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(goto-char (match-end 1))
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(read (current-buffer)))
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seconds))
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(setq groups (cons (buffer-substring
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(match-beginning 1) (match-end 1))
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groups))
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(zerop (forward-line -1))))
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(erase-buffer)
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(while groups
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(insert (car groups) " 0 0 y\n")
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(setq groups (cdr groups))))
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t)
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nil))
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(defun nnspool-request-post (&optional server)
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"Post a new news in current buffer."
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(save-excursion
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(let* ((process-connection-type nil) ; t bugs out on Solaris
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(inews-buffer (generate-new-buffer " *nnspool post*"))
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(proc (apply 'start-process "*nnspool inews*" inews-buffer
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nnspool-inews-program nnspool-inews-switches)))
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(set-process-sentinel proc 'nnspool-inews-sentinel)
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(process-send-region proc (point-min) (point-max))
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;; We slap a condition-case around this, because the process may
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;; have exited already...
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(condition-case nil
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(process-send-eof proc)
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(error nil))
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t)))
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(defun nnspool-inews-sentinel (proc status)
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(save-excursion
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(set-buffer (process-buffer proc))
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(goto-char (point-min))
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(if (or (zerop (buffer-size))
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(search-forward "spooled" nil t))
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(kill-buffer (current-buffer))
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;; Make status message by unfolding lines.
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(subst-char-in-region (point-min) (point-max) ?\n ?\\ 'noundo)
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(setq nnspool-status-string (buffer-string))
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(message "nnspool: %s" nnspool-status-string)
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;(kill-buffer (current-buffer))
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)))
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(defalias 'nnspool-request-post-buffer 'nntp-request-post-buffer)
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;;; Internal functions.
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(defun nnspool-retrieve-headers-with-nov (articles)
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(if (or gnus-nov-is-evil nnspool-nov-is-evil)
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nil
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(let ((nov (concat (file-name-as-directory nnspool-nov-directory)
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(nnspool-replace-chars-in-string
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nnspool-current-group ?. ?/)
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"/.overview"))
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article)
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(if (file-exists-p nov)
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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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(if nnspool-sift-nov-with-sed
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(nnspool-sift-nov-with-sed articles nov)
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(insert-file-contents nov)
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;; First we find the first wanted line. We issue a number
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;; of search-forwards - the first article we are looking
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;; for may be expired, so we have to go on searching until
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;; we find one of the articles we want.
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(while (and articles
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(setq article (concat (int-to-string
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(car articles)) "\t"))
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(not (or (looking-at article)
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(search-forward (concat "\n" article)
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nil t))))
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(setq articles (cdr articles)))
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(if (not articles)
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()
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(beginning-of-line)
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(delete-region (point-min) (point))
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;; Then we find the last wanted line. We go to the end
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;; of the buffer and search backward much the same way
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;; we did to find the first article.
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;; !!! Perhaps it would be better just to do a (last articles),
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;; and go forward successively over each line and
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;; compare to avoid this (reverse), like this:
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;; (while (and (>= last (read nntp-server-buffer)))
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;; (zerop (forward-line 1))))
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(setq articles (reverse articles))
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(goto-char (point-max))
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(while (and articles
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(not (search-backward
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(concat "\n" (int-to-string (car articles))
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"\t") nil t)))
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(setq articles (cdr articles)))
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(if articles
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(progn
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(forward-line 2)
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(delete-region (point) (point-max)))))
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(or articles (progn (erase-buffer) nil))))))))
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(defun nnspool-sift-nov-with-sed (articles file)
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(let ((first (car articles))
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(last (progn (while (cdr articles) (setq articles (cdr articles)))
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(car articles))))
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(call-process "awk" nil t nil
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(format "BEGIN {firstmsg=%d; lastmsg=%d;}\n $1 >= firstmsg && $1 <= lastmsg {print;}"
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(1- first) (1+ last))
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file)))
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;; Fixed by fdc@cliwe.ping.de (Frank D. Cringle).
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(defun nnspool-find-article-by-message-id (id)
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"Return full pathname of an article identified by message-ID."
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(save-excursion
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(let ((buf (get-buffer-create " *nnspool work*")))
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(set-buffer buf)
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(erase-buffer)
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(call-process "grep" nil t nil id nnspool-history-file)
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(goto-char (point-min))
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(if (looking-at "<[^>]+>[ \t]+[-0-9~]+[ \t]+\\([^ \t\n]*\\)")
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(concat nnspool-spool-directory
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(nnspool-replace-chars-in-string
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(buffer-substring (match-beginning 1) (match-end 1))
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?. ?/))))))
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(defun nnspool-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 (insert-file-contents file) t)
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(file-error nil)))
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(defun nnspool-possibly-change-directory (newsgroup)
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(if newsgroup
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(let ((pathname (nnspool-article-pathname
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(nnspool-replace-chars-in-string newsgroup ?. ?/))))
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(if (file-directory-p pathname)
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(progn
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(setq nnspool-current-directory pathname)
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(setq nnspool-current-group newsgroup))
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(setq nnspool-status-string
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(format "No such newsgroup: %s" newsgroup))
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nil))
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t))
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(defun nnspool-article-pathname (group)
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"Make pathname for GROUP."
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(concat (file-name-as-directory nnspool-spool-directory) group "/"))
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(defun nnspool-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 occurrences 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)))
|
||
string))
|
||
|
||
(defun nnspool-number-base-10 (num pos)
|
||
(if (<= pos 0) ""
|
||
(setcdr num (+ (* (% (car num) 10) 65536) (cdr num)))
|
||
(apply
|
||
'concat
|
||
(reverse
|
||
(list
|
||
(char-to-string
|
||
(aref "0123456789" (% (cdr num) 10)))
|
||
(progn
|
||
(setcdr num (/ (cdr num) 10))
|
||
(setcar num (/ (car num) 10))
|
||
(nnspool-number-base-10 num (1- pos))))))))
|
||
|
||
(defun nnspool-seconds-since-epoch (date)
|
||
(let* ((tdate (mapcar (lambda (ti) (and ti (string-to-int ti)))
|
||
(timezone-parse-date date)))
|
||
(ttime (mapcar (lambda (ti) (and ti (string-to-int ti)))
|
||
(timezone-parse-time
|
||
(aref (timezone-parse-date date) 3))))
|
||
(unix (encode-time (nth 2 ttime) (nth 1 ttime) (nth 0 ttime)
|
||
(nth 2 tdate) (nth 1 tdate) (nth 0 tdate) (nth 4 tdate))))
|
||
(+ (* (car unix) 65536.0)
|
||
(car (cdr unix)))))
|
||
|
||
(provide 'nnspool)
|
||
|
||
;;; nnspool.el ends here
|