+++ /dev/null
-;;; mime-parse.el --- MIME message parser
-
-;; Copyright (C) 1994,1995,1996,1997,1998 Free Software Foundation, Inc.
-
-;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
-;; 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
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