;;; nndoc.el --- single file access for Gnus ;; Copyright (C) 1995,96 Free Software Foundation, Inc. ;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no> ;; Masanobu UMEDA <umerin@flab.flab.fujitsu.junet> ;; Keywords: news ;; This file is part of GNU Emacs. ;; 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. ;;; Commentary: ;;; Code: (require 'nnheader) (require 'message) (require 'nnmail) (require 'nnoo) (eval-when-compile (require 'cl)) (nnoo-declare nndoc) (defvoo nndoc-article-type 'guess "*Type of the file. One of `mbox', `babyl', `digest', `news', `rnews', `mmdf', `forward', `mime-digest', `standard-digest', `slack-digest', `clari-briefs' or `guess'.") (defvoo nndoc-post-type 'mail "*Whether the nndoc group is `mail' or `post'.") (defvar nndoc-type-alist `((mmdf (article-begin . "^\^A\^A\^A\^A\n") (body-end . "^\^A\^A\^A\^A\n")) (news (article-begin . "^Path:")) (rnews (article-begin . "^#! *rnews +\\([0-9]+\\) *\n") (body-end-function . nndoc-rnews-body-end)) (mbox (article-begin . "^From \\([^ \n]*\\(\\|\".*\"[^ \n]*\\)\\) ?\\([^ \n]*\\) *\\([^ ]*\\) *\\([0-9]*\\) *\\([0-9:]*\\) *\\([A-Z]?[A-Z]?[A-Z][A-Z]\\( DST\\)?\\|[-+]?[0-9][0-9][0-9][0-9]\\|\\) * [0-9][0-9]\\([0-9]*\\) *\\([A-Z]?[A-Z]?[A-Z][A-Z]\\( DST\\)?\\|[-+]?[0-9][0-9][0-9][0-9]\\|\\) *\\(remote from .*\\)?\n") (article-begin-function . nndoc-mbox-article-begin) (body-end-function . nndoc-mbox-body-end)) (babyl (article-begin . "\^_\^L *\n") (body-end . "\^_") (body-begin-function . nndoc-babyl-body-begin) (head-begin-function . nndoc-babyl-head-begin)) (forward (article-begin . "^-+ Start of forwarded message -+\n+") (body-end . "^-+ End of forwarded message -+$") (prepare-body . nndoc-unquote-dashes)) (clari-briefs (article-begin . "^ \\*") (body-end . "^\t------*[ \t]^*\n^ \\*") (body-begin . "^\t") (head-end . "^\t") (generate-head . nndoc-generate-clari-briefs-head) (article-transform . nndoc-transform-clari-briefs)) (slack-digest (article-begin . "^------------------------------*[\n \t]+") (head-end . "^ ?$") (body-end-function . nndoc-digest-body-end) (body-begin . "^ ?$") (file-end . "^End of") (prepare-body . nndoc-unquote-dashes)) (mime-digest (article-begin . "") (head-end . "^ ?$") (body-end . "") (file-end . "")) (standard-digest (first-article . ,(concat "^" (make-string 70 ?-) "\n\n+")) (article-begin . ,(concat "\n\n" (make-string 30 ?-) "\n\n+")) (prepare-body . nndoc-unquote-dashes) (body-end-function . nndoc-digest-body-end) (head-end . "^ ?$") (body-begin . "^ ?\n") (file-end . "^End of .*digest.*[0-9].*\n\\*\\*\\|^End of.*Digest *$")) (guess (guess . nndoc-guess-type)) (digest (guess . nndoc-guess-digest-type)) )) (defvoo nndoc-file-begin nil) (defvoo nndoc-first-article nil) (defvoo nndoc-article-end nil) (defvoo nndoc-article-begin nil) (defvoo nndoc-article-begin-function nil) (defvoo nndoc-head-begin nil) (defvoo nndoc-head-end nil) (defvoo nndoc-file-end nil) (defvoo nndoc-body-begin nil) (defvoo nndoc-body-end-function nil) (defvoo nndoc-body-begin-function nil) (defvoo nndoc-head-begin-function nil) (defvoo nndoc-body-end nil) (defvoo nndoc-dissection-alist nil) (defvoo nndoc-prepare-body nil) (defvoo nndoc-generate-head nil) (defvoo nndoc-article-transform nil) (defvoo nndoc-status-string "") (defvoo nndoc-group-alist nil) (defvoo nndoc-current-buffer nil "Current nndoc news buffer.") (defvoo nndoc-address nil) (defconst nndoc-version "nndoc 1.0" "nndoc version.") ;;; Interface functions (nnoo-define-basics nndoc) (deffoo nndoc-retrieve-headers (articles &optional newsgroup server fetch-old) (when (nndoc-possibly-change-buffer newsgroup server) (save-excursion (set-buffer nntp-server-buffer) (erase-buffer) (let (article entry) (if (stringp (car articles)) 'headers (while articles (when (setq entry (cdr (assq (setq article (pop articles)) nndoc-dissection-alist))) (insert (format "221 %d Article retrieved.\n" article)) (if nndoc-generate-head (funcall nndoc-generate-head article) (insert-buffer-substring nndoc-current-buffer (car entry) (nth 1 entry))) (goto-char (point-max)) (or (= (char-after (1- (point))) ?\n) (insert "\n")) (insert (format "Lines: %d\n" (nth 4 entry))) (insert ".\n"))) (nnheader-fold-continuation-lines) 'headers))))) (deffoo nndoc-request-article (article &optional newsgroup server buffer) (nndoc-possibly-change-buffer newsgroup server) (save-excursion (let ((buffer (or buffer nntp-server-buffer)) (entry (cdr (assq article nndoc-dissection-alist))) beg) (set-buffer buffer) (erase-buffer) (if (stringp article) nil (insert-buffer-substring nndoc-current-buffer (car entry) (nth 1 entry)) (insert "\n") (setq beg (point)) (insert-buffer-substring nndoc-current-buffer (nth 2 entry) (nth 3 entry)) (goto-char beg) (when nndoc-prepare-body (funcall nndoc-prepare-body)) (when nndoc-article-transform (funcall nndoc-article-transform article)) t)))) (deffoo nndoc-request-group (group &optional server dont-check) "Select news GROUP." (let (number) (cond ((not (nndoc-possibly-change-buffer group server)) (nnheader-report 'nndoc "No such file or buffer: %s" nndoc-address)) (dont-check (nnheader-report 'nndoc "Selected group %s" group) t) ((zerop (setq number (length nndoc-dissection-alist))) (nndoc-close-group group) (nnheader-report 'nndoc "No articles in group %s" group)) (t (nnheader-insert "211 %d %d %d %s\n" number 1 number group))))) (deffoo nndoc-request-type (group &optional article) (cond ((not article) 'unknown) (nndoc-post-type nndoc-post-type) (t 'unknown))) (deffoo nndoc-close-group (group &optional server) (nndoc-possibly-change-buffer group server) (and nndoc-current-buffer (buffer-name nndoc-current-buffer) (kill-buffer nndoc-current-buffer)) (setq nndoc-group-alist (delq (assoc group nndoc-group-alist) nndoc-group-alist)) (setq nndoc-current-buffer nil) (nnoo-close-server 'nndoc server) (setq nndoc-dissection-alist nil) t) (deffoo nndoc-request-list (&optional server) nil) (deffoo nndoc-request-newgroups (date &optional server) nil) (deffoo nndoc-request-list-newsgroups (&optional server) nil) ;;; Internal functions. (defun nndoc-possibly-change-buffer (group source) (let (buf) (cond ;; The current buffer is this group's buffer. ((and nndoc-current-buffer (buffer-name nndoc-current-buffer) (eq nndoc-current-buffer (setq buf (cdr (assoc group nndoc-group-alist)))))) ;; We change buffers by taking an old from the group alist. ;; `source' is either a string (a file name) or a buffer object. (buf (setq nndoc-current-buffer buf)) ;; It's a totally new group. ((or (and (bufferp nndoc-address) (buffer-name nndoc-address)) (and (stringp nndoc-address) (file-exists-p nndoc-address) (not (file-directory-p nndoc-address)))) (push (cons group (setq nndoc-current-buffer (get-buffer-create (concat " *nndoc " group "*")))) nndoc-group-alist) (setq nndoc-dissection-alist nil) (save-excursion (set-buffer nndoc-current-buffer) (buffer-disable-undo (current-buffer)) (erase-buffer) (if (stringp nndoc-address) (insert-file-contents nndoc-address) (insert-buffer-substring nndoc-address))))) ;; Initialize the nndoc structures according to this new document. (when (and nndoc-current-buffer (not nndoc-dissection-alist)) (save-excursion (set-buffer nndoc-current-buffer) (nndoc-set-delims) (nndoc-dissect-buffer))) (unless nndoc-current-buffer (nndoc-close-server)) ;; Return whether we managed to select a file. nndoc-current-buffer)) ;; MIME (RFC 1341) digest hack by Ulrik Dickow <dickow@nbi.dk>. (defun nndoc-guess-digest-type () "Guess what digest type the current document is." (let ((case-fold-search t) ; We match a bit too much, keep it simple. boundary-id b-delimiter entry) (goto-char (point-min)) (cond ;; MIME digest. ((and (re-search-forward (concat "^Content-Type: *multipart/digest;[ \t\n]*[ \t]" "boundary=\"\\([^\"\n]*[^\" \t\n]\\)\"") nil t) (match-beginning 1)) (setq boundary-id (match-string 1) b-delimiter (concat "\n--" boundary-id "[\n \t]+")) (setq entry (assq 'mime-digest nndoc-type-alist)) (setcdr entry (list (cons 'head-end "^ ?$") (cons 'body-begin "^ ?\n") (cons 'article-begin b-delimiter) (cons 'body-end-function 'nndoc-digest-body-end) ; (cons 'body-end ; (concat "\n--" boundary-id "\\(--\\)?[\n \t]+")) (cons 'file-end (concat "\n--" boundary-id "--[ \t]*$")))) 'mime-digest) ;; Standard digest. ((and (re-search-forward (concat "^" (make-string 70 ?-) "\n\n") nil t) (re-search-forward (concat "\n\n" (make-string 30 ?-) "\n\n") nil t)) 'standard-digest) ;; Stupid digest. (t 'slack-digest)))) (defun nndoc-guess-type () "Guess what document type is in the current buffer." (goto-char (point-min)) (cond ((looking-at message-unix-mail-delimiter) 'mbox) ((looking-at "\^A\^A\^A\^A$") 'mmdf) ((looking-at "^Path:.*\n") 'news) ((looking-at "#! *rnews") 'rnews) ((re-search-forward "\^_\^L *\n" nil t) 'babyl) ((save-excursion (and (re-search-forward "^-+ Start of forwarded message -+\n+" nil t) (not (re-search-forward "^Subject:.*digest" nil t)))) 'forward) ((let ((case-fold-search nil)) (re-search-forward "^\t[^a-z]+ ([^a-z]+) --" nil t)) 'clari-briefs) (t 'digest))) (defun nndoc-set-delims () "Set the nndoc delimiter variables according to the type of the document." (let ((vars '(nndoc-file-begin nndoc-first-article nndoc-article-end nndoc-head-begin nndoc-head-end nndoc-file-end nndoc-article-begin nndoc-body-begin nndoc-body-end-function nndoc-body-end nndoc-prepare-body nndoc-article-transform nndoc-generate-head nndoc-body-begin-function nndoc-head-begin-function nndoc-article-begin-function))) (while vars (set (pop vars) nil))) (let* (defs guess) ;; Guess away until we find the real file type. (while (setq defs (cdr (assq nndoc-article-type nndoc-type-alist)) guess (assq 'guess defs)) (setq nndoc-article-type (funcall (cdr guess)))) ;; Set the nndoc variables. (while defs (set (intern (format "nndoc-%s" (caar defs))) (cdr (pop defs)))))) (defun nndoc-search (regexp) (prog1 (re-search-forward regexp nil t) (beginning-of-line))) (defun nndoc-dissect-buffer () "Go through the document and partition it into heads/bodies/articles." (let ((i 0) (first t) head-begin head-end body-begin body-end) (setq nndoc-dissection-alist nil) (save-excursion (set-buffer nndoc-current-buffer) (goto-char (point-min)) ;; Find the beginning of the file. (when nndoc-file-begin (nndoc-search nndoc-file-begin)) ;; Go through the file. (while (if (and first nndoc-first-article) (nndoc-search nndoc-first-article) (if nndoc-article-begin-function (funcall nndoc-article-begin-function) (nndoc-search nndoc-article-begin))) (setq first nil) (cond (nndoc-head-begin-function (funcall nndoc-head-begin-function)) (nndoc-head-begin (nndoc-search nndoc-head-begin))) (if (and nndoc-file-end (looking-at nndoc-file-end)) (goto-char (point-max)) (setq head-begin (point)) (nndoc-search (or nndoc-head-end "^$")) (setq head-end (point)) (if nndoc-body-begin-function (funcall nndoc-body-begin-function) (nndoc-search (or nndoc-body-begin "^\n"))) (setq body-begin (point)) (or (and nndoc-body-end-function (funcall nndoc-body-end-function)) (and nndoc-body-end (nndoc-search nndoc-body-end)) (if nndoc-article-begin-function (funcall nndoc-article-begin-function) (nndoc-search nndoc-article-begin)) (progn (goto-char (point-max)) (when nndoc-file-end (and (re-search-backward nndoc-file-end nil t) (beginning-of-line))))) (setq body-end (point)) (push (list (incf i) head-begin head-end body-begin body-end (count-lines body-begin body-end)) nndoc-dissection-alist)))))) (defun nndoc-unquote-dashes () "Unquote quoted non-separators in digests." (while (re-search-forward "^- -"nil t) (replace-match "-" t t))) (defun nndoc-digest-body-end () (and (re-search-forward nndoc-article-begin nil t) (goto-char (match-beginning 0)))) (defun nndoc-mbox-article-begin () (when (re-search-forward nndoc-article-begin nil t) (goto-char (match-beginning 0)))) (defun nndoc-mbox-body-end () (let ((beg (point)) len end) (when (save-excursion (and (re-search-backward nndoc-article-begin nil t) (setq end (point)) (search-forward "\n\n" beg t) (re-search-backward "^Content-Length:[ \t]*\\([0-9]+\\) *$" end t) (setq len (string-to-int (match-string 1))) (search-forward "\n\n" beg t) (or (= (setq len (+ (point) len)) (point-max)) (and (< len (point-max)) (goto-char len) (looking-at nndoc-article-begin))))) (goto-char len)))) (defun nndoc-rnews-body-end () (and (re-search-backward nndoc-article-begin nil t) (forward-line 1) (goto-char (+ (point) (string-to-int (match-string 1)))))) (defun nndoc-transform-clari-briefs (article) (goto-char (point-min)) (when (looking-at " *\\*\\(.*\\)\n") (replace-match "" t t)) (nndoc-generate-clari-briefs-head article)) (defun nndoc-generate-clari-briefs-head (article) (let ((entry (cdr (assq article nndoc-dissection-alist))) subject from) (save-excursion (set-buffer nndoc-current-buffer) (save-restriction (narrow-to-region (car entry) (nth 3 entry)) (goto-char (point-min)) (when (looking-at " *\\*\\(.*\\)$") (setq subject (match-string 1)) (when (string-match "[ \t]+$" subject) (setq subject (substring subject 0 (match-beginning 0))))) (when (let ((case-fold-search nil)) (re-search-forward "^\t\\([^a-z]+\\(,[^(]+\\)? ([^a-z]+)\\) --" nil t)) (setq from (match-string 1))))) (insert "From: " "clari@clari.net (" (or from "unknown") ")" "\nSubject: " (or subject "(no subject)") "\n"))) (defun nndoc-babyl-body-begin () (re-search-forward "^\n" nil t) (when (looking-at "\*\*\* EOOH \*\*\*") (re-search-forward "^\n" nil t))) (defun nndoc-babyl-head-begin () (when (re-search-forward "^[0-9].*\n" nil t) (when (looking-at "\*\*\* EOOH \*\*\*") (forward-line 1)) t)) (provide 'nndoc) ;;; nndoc.el ends here