From 8b7af6d3b6883d4b17d63b1725cbbeabaafc49fa Mon Sep 17 00:00:00 2001 From: morioka Date: Wed, 17 Jun 1998 21:50:54 +0000 Subject: [PATCH] mime-parse.el was moved from SEMI layer. --- FLIM-ELS | 2 +- mime-parse.el | 327 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 328 insertions(+), 1 deletion(-) create mode 100644 mime-parse.el diff --git a/FLIM-ELS b/FLIM-ELS index e4b270c..a5a4034 100644 --- a/FLIM-ELS +++ b/FLIM-ELS @@ -8,7 +8,7 @@ mime-def mel mel-dl mel-b mel-q mel-u mel-g eword-decode eword-encode - mime-lib mailcap)) + mime-lib mime-parse mailcap)) (if (fboundp 'dynamic-link) (setq flim-modules (cons 'mel-dl flim-modules)) diff --git a/mime-parse.el b/mime-parse.el new file mode 100644 index 0000000..1350651 --- /dev/null +++ b/mime-parse.el @@ -0,0 +1,327 @@ +;;; mime-parse.el --- MIME message parser + +;; Copyright (C) 1994,1995,1996,1997,1998 Free Software Foundation, Inc. + +;; Author: MORIOKA Tomohiko +;; Keywords: parse, MIME, multimedia, mail, news + +;; This file is part of SEMI (Spadework for Emacs MIME Interfaces). + +;; This program 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. + +;; This program 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. + +;;; Code: + +(require 'emu) +(require 'std11) +(require 'mime-def) + + +;;; @ field parser +;;; + +(defconst mime/content-parameter-value-regexp + (concat "\\(" + std11-quoted-string-regexp + "\\|[^; \t\n]*\\)")) + +(defconst mime::parameter-regexp + (concat "^[ \t]*\;[ \t]*\\(" mime-token-regexp "\\)" + "[ \t]*=[ \t]*\\(" mime/content-parameter-value-regexp "\\)")) + +(defun mime-parse-parameter (str) + (if (string-match mime::parameter-regexp str) + (let ((e (match-end 2))) + (cons + (cons (downcase (substring str (match-beginning 1) (match-end 1))) + (std11-strip-quoted-string + (substring str (match-beginning 2) e)) + ) + (substring str e) + )))) + + +;;; @ Content-Type +;;; + +(defsubst make-mime-content-type (type subtype &optional parameters) + (list* (cons 'type type) + (cons 'subtype subtype) + (nreverse parameters)) + ) + +(defun mime-parse-Content-Type (string) + "Parse STRING as field-body of Content-Type field. +Return value is + (PRIMARY-TYPE SUBTYPE (NAME1 . VALUE1)(NAME2 . VALUE2) ...) +or nil. PRIMARY-TYPE and SUBTYPE are symbol and NAME_n and VALUE_n +are string." + (setq string (std11-unfold-string string)) + (if (string-match `,(concat "^\\(" mime-token-regexp + "\\)/\\(" mime-token-regexp "\\)") string) + (let* ((type (downcase + (substring string (match-beginning 1) (match-end 1)))) + (subtype (downcase + (substring string (match-beginning 2) (match-end 2)))) + ret dest) + (setq string (substring string (match-end 0))) + (while (setq ret (mime-parse-parameter string)) + (setq dest (cons (car ret) dest) + string (cdr ret)) + ) + (make-mime-content-type (intern type)(intern subtype) + (nreverse dest)) + ))) + +(defun mime-read-Content-Type () + "Read field-body of Content-Type field from current-buffer, +and return parsed it. Format of return value is as same as +`mime-parse-Content-Type'." + (let ((str (std11-field-body "Content-Type"))) + (if str + (mime-parse-Content-Type str) + ))) + +(defsubst mime-content-type-primary-type (content-type) + "Return primary-type of CONTENT-TYPE." + (cdr (car content-type))) + +(defsubst mime-content-type-subtype (content-type) + "Return primary-type of CONTENT-TYPE." + (cdr (cadr content-type))) + +(defsubst mime-content-type-parameters (content-type) + "Return primary-type of CONTENT-TYPE." + (cddr content-type)) + +(defsubst mime-content-type-parameter (content-type parameter) + "Return PARAMETER value of CONTENT-TYPE." + (cdr (assoc parameter (mime-content-type-parameters content-type)))) + + +;;; @ Content-Disposition +;;; + +(defconst mime-disposition-type-regexp mime-token-regexp) + +(defun mime-parse-Content-Disposition (string) + "Parse STRING as field-body of Content-Disposition field." + (setq string (std11-unfold-string string)) + (if (string-match `,(concat "^" mime-disposition-type-regexp) string) + (let* ((e (match-end 0)) + (type (downcase (substring string 0 e))) + ret dest) + (setq string (substring string e)) + (while (setq ret (mime-parse-parameter string)) + (setq dest (cons (car ret) dest) + string (cdr ret)) + ) + (cons (cons 'type (intern type)) + (nreverse dest)) + ))) + +(defun mime-read-Content-Disposition () + "Read field-body of Content-Disposition field from current-buffer, +and return parsed it." + (let ((str (std11-field-body "Content-Disposition"))) + (if str + (mime-parse-Content-Disposition str) + ))) + +(defsubst mime-content-disposition-type (content-disposition) + "Return disposition-type of CONTENT-DISPOSITION." + (cdr (car content-disposition))) + +(defsubst mime-content-disposition-parameters (content-disposition) + "Return disposition-parameters of CONTENT-DISPOSITION." + (cdr content-disposition)) + +(defsubst mime-content-disposition-parameter (content-disposition parameter) + "Return PARAMETER value of CONTENT-DISPOSITION." + (cdr (assoc parameter (cdr content-disposition)))) + +(defsubst mime-content-disposition-filename (content-disposition) + "Return filename of CONTENT-DISPOSITION." + (mime-content-disposition-parameter content-disposition "filename")) + + +;;; @ Content-Transfer-Encoding +;;; + +(defun mime-parse-Content-Transfer-Encoding (string) + "Parse STRING as field-body of Content-Transfer-Encoding field." + (if (string-match "[ \t\n\r]+$" string) + (setq string (match-string 0 string)) + ) + (downcase string)) + +(defun mime-read-Content-Transfer-Encoding (&optional default-encoding) + "Read field-body of Content-Transfer-Encoding field from +current-buffer, and return it. +If is is not found, return DEFAULT-ENCODING." + (let ((str (std11-field-body "Content-Transfer-Encoding"))) + (if str + (mime-parse-Content-Transfer-Encoding str) + default-encoding))) + + +;;; @ message parser +;;; + +(defalias 'mime-entity-point-min 'mime-entity-header-start) +(defalias 'mime-entity-point-max 'mime-entity-body-end) + +(defsubst mime-entity-media-type (entity) + (mime-content-type-primary-type (mime-entity-content-type entity))) +(defsubst mime-entity-media-subtype (entity) + (mime-content-type-subtype (mime-entity-content-type entity))) +(defsubst mime-entity-parameters (entity) + (mime-content-type-parameters (mime-entity-content-type entity))) + +(defsubst mime-entity-type/subtype (entity-info) + (mime-type/subtype-string (mime-entity-media-type entity-info) + (mime-entity-media-subtype entity-info))) + +(defun mime-parse-multipart (header-start header-end body-start body-end + content-type content-disposition + encoding node-id) + (goto-char (point-min)) + (let* ((dash-boundary + (concat "--" + (std11-strip-quoted-string + (mime-content-type-parameter content-type "boundary")))) + (delimiter (concat "\n" (regexp-quote dash-boundary))) + (close-delimiter (concat delimiter "--[ \t]*$")) + (rsep (concat delimiter "[ \t]*\n")) + (dc-ctl + (if (eq (mime-content-type-subtype content-type) 'digest) + (make-mime-content-type 'message 'rfc822) + (make-mime-content-type 'text 'plain) + )) + cb ce ret ncb children (i 0)) + (save-restriction + (goto-char body-end) + (narrow-to-region header-end + (if (re-search-backward close-delimiter nil t) + (match-beginning 0) + body-end)) + (goto-char header-start) + (re-search-forward rsep nil t) + (setq cb (match-end 0)) + (while (re-search-forward rsep nil t) + (setq ce (match-beginning 0)) + (setq ncb (match-end 0)) + (save-restriction + (narrow-to-region cb ce) + (setq ret (mime-parse-message dc-ctl "7bit" (cons i node-id))) + ) + (setq children (cons ret children)) + (goto-char (mime-entity-point-max ret)) + (goto-char (setq cb ncb)) + (setq i (1+ i)) + ) + (setq ce (point-max)) + (save-restriction + (narrow-to-region cb ce) + (setq ret (mime-parse-message dc-ctl "7bit" (cons i node-id))) + ) + (setq children (cons ret children)) + ) + (make-mime-entity (current-buffer) + header-start header-end body-start body-end + node-id content-type content-disposition encoding + (nreverse children)) + )) + +(defun mime-parse-message (&optional default-ctl default-encoding node-id) + "Parse current-buffer as a MIME message. +DEFAULT-CTL is used when an entity does not have valid Content-Type +field. Its format must be as same as return value of +mime-{parse|read}-Content-Type." + (let ((header-start (point-min)) + header-end + body-start + (body-end (point-max)) + content-type content-disposition encoding + primary-type) + (goto-char header-start) + (if (re-search-forward "^$" nil t) + (setq header-end (match-end 0) + body-start (1+ header-end)) + (setq header-end (point-min) + body-start (point-min)) + ) + (save-restriction + (narrow-to-region header-start header-end) + (setq content-type (or (let ((str (std11-fetch-field "Content-Type"))) + (if str + (mime-parse-Content-Type str) + )) + default-ctl) + content-disposition (let ((str (std11-fetch-field + "Content-Disposition"))) + (if str + (mime-parse-Content-Disposition str) + )) + encoding (let ((str (std11-fetch-field + "Content-Transfer-Encoding"))) + (if str + (mime-parse-Content-Transfer-Encoding str) + default-encoding)) + primary-type (mime-content-type-primary-type content-type)) + ) + (cond ((eq primary-type 'multipart) + (mime-parse-multipart header-start header-end + body-start body-end + content-type content-disposition encoding + node-id) + ) + ((and (eq primary-type 'message) + (memq (mime-content-type-subtype content-type) + '(rfc822 news) + )) + (make-mime-entity (current-buffer) + header-start header-end body-start body-end + node-id + content-type content-disposition encoding + (save-restriction + (narrow-to-region body-start body-end) + (list (mime-parse-message + nil nil (cons 0 node-id))) + )) + ) + (t + (make-mime-entity (current-buffer) + header-start header-end body-start body-end + node-id + content-type content-disposition encoding nil) + )) + )) + + +;;; @ utilities +;;; + +(defsubst mime-root-entity-p (entity) + "Return t if ENTITY is root-entity (message)." + (null (mime-entity-node-id entity))) + + +;;; @ end +;;; + +(provide 'mime-parse) + +;;; mime-parse.el ends here -- 1.7.10.4