;;; mime-parse.el --- MIME message parser
-;; Copyright (C) 1994,1995,1996,1997,1998,1999 Free Software Foundation, Inc.
+;; Copyright (C) 1994,95,96,97,98,99,2001 Free Software Foundation, Inc.
;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
+;; Shuhei KOBAYASHI <shuhei@aqua.ocn.ne.jp>
;; Keywords: parse, MIME, multimedia, mail, news
-;; This file is part of SEMI (Spadework for Emacs MIME Interfaces).
+;; This file is part of FLIM (Faithful Library about Internet Message).
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License as
(defun mime-analyze-tspecial (string start)
(if (and (> (length string) start)
(memq (aref string start) mime-tspecial-char-list))
- (cons (cons 'tpecials (substring string start (1+ start)))
- (1+ start))
- ))
+ (cons (cons 'tspecials (substring string start (1+ start)))
+ (1+ start))))
(defun mime-analyze-token (string start)
(if (and (string-match mime-token-regexp string start)
(= (match-beginning 0) start))
(let ((end (match-end 0)))
(cons (cons 'mime-token (substring string start end))
- ;;(substring string end)
- end)
- )))
+ end))))
+
+(defun mime-lexical-analyze (string)
+ "Analyze STRING as lexical tokens of MIME."
+ (let ((ret (std11-lexical-analyze string mime-lexical-analyzer))
+ prev tail)
+ ;; skip leading linear-white-space.
+ (while (memq (car (car ret)) '(spaces comment))
+ (setq ret (cdr ret)))
+ (setq prev ret
+ tail (cdr ret))
+ ;; remove linear-white-space.
+ (while tail
+ (if (memq (car (car tail)) '(spaces comment))
+ (progn
+ (setcdr prev (cdr tail))
+ (setq tail (cdr tail)))
+ (setq prev (cdr prev)
+ tail (cdr tail))))
+ ret))
;;; @ 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
+(defun mime-decode-parameter-value (text charset language)
+ (with-temp-buffer
+ (set-buffer-multibyte nil)
+ (insert text)
+ (goto-char (point-min))
+ (while (re-search-forward "%[0-9A-Fa-f][0-9A-Fa-f]" nil t)
+ (insert (prog1 (string-to-int
+ (buffer-substring (point)(- (point) 2))
+ 16)
+ (delete-region (point)(- (point) 3)))))
+ (setq text (buffer-string))
+ (when charset
+ ;; I believe that `decode-mime-charset-string' of mcs-e20.el should
+ ;; be independent of the value of `enable-multibyte-characters'.
+ (erase-buffer)
+ (set-buffer-multibyte t)
+ (setq text (decode-mime-charset-string text charset)))
+ (when language
+ (put-text-property 0 (length text) 'mime-language language text))
+ text))
+
+(defun mime-decode-parameter-encode-segment (segment)
+ (with-temp-buffer
+ (set-buffer-multibyte nil)
+ (insert segment)
+ (goto-char (point-min))
+ (while (progn
+ (when (looking-at (eval-when-compile
+ (concat mime-attribute-char-regexp "+")))
+ (goto-char (match-end 0)))
+ (not (eobp)))
+ (insert (prog1 (format "%%%02X" (char-int (char-after)))
+ (delete-region (point)(1+ (point))))))
+ (buffer-string)))
+
+(defun mime-decode-parameters (params)
+ "Decode PARAMS as a property list of MIME parameter values.
+Return value is an association list of MIME parameter values.
+If parameter continuation is used, segments of values are concatenated.
+If parameters contain charset information, values are decoded.
+If parameters contain language information, it is set to `mime-language'
+property of the decoded-value."
+ ;; (unless (zerop (% (length params) 2)) ...)
+ (let ((len (/ (length params) 2))
+ dest eparams)
+ (while params
+ (if (and (string-match (eval-when-compile
+ (concat "^\\(" mime-attribute-char-regexp "+\\)"
+ "\\(\\*[0-9]+\\)?" ; continuation
+ "\\(\\*\\)?$")) ; charset/language
+ (car params))
+ (> (match-end 0) (match-end 1)))
+ ;; parameter value extensions are used.
+ (let* ((attribute (downcase
+ (substring (car params) 0 (match-end 1))))
+ (section (if (match-beginning 2)
+ (string-to-int
+ (substring (car params)
+ (1+ (match-beginning 2))
+ (match-end 2)))
+ 0))
+ ;; EPARAM := (ATTRIBUTE VALUES CHARSET LANGUAGE)
+ ;; VALUES := [1*VALUE] ; vector of LEN elements.
+ (eparam (assoc attribute eparams))
+ (value (progn
+ (setq params (cdr params))
+ (car params))))
+ (if eparam
+ (setq eparam (cdr eparam))
+ (setq eparam (list (make-vector len nil) nil nil)
+ eparams (cons (cons attribute eparam) eparams)))
+ ;; if parameter-name ends with "*", it is an extended-parameter.
+ (if (match-beginning 3)
+ (if (zerop section)
+ ;; extended-initial-parameter.
+ (if (string-match (eval-when-compile
+ (concat
+ "^\\(" mime-charset-regexp "\\)?"
+ "'\\(" mime-language-regexp "\\)?"
+ "'\\(\\(" mime-attribute-char-regexp
+ "\\|%[0-9A-Fa-f][0-9A-Fa-f]\\)+\\)$"))
+ value)
+ (progn
+ ;; text
+ (aset (car eparam) 0
+ (substring value (match-beginning 3)))
+ (setq eparam (cdr eparam))
+ ;; charset
+ (when (match-beginning 1)
+ (setcar eparam
+ (downcase
+ (substring value 0 (match-end 1)))))
+ (setq eparam (cdr eparam))
+ ;; language
+ (when (match-beginning 2)
+ (setcar eparam
+ (intern
+ (downcase
+ (substring value
+ (match-beginning 2)
+ (match-end 2)))))))
+ ;; invalid parameter-value.
+ (aset (car eparam) 0
+ (mime-decode-parameter-encode-segment value)))
+ ;; extended-other-parameter.
+ (if (string-match (eval-when-compile
+ (concat
+ "^\\(\\(" mime-attribute-char-regexp
+ "\\|%[0-9A-Fa-f][0-9A-Fa-f]\\)+\\)$"))
+ value)
+ (aset (car eparam) section value)
+ ;; invalid parameter-value.
+ (aset (car eparam) section
+ (mime-decode-parameter-encode-segment value))))
+ ;; regular-parameter. parameter continuation only.
+ (aset (car eparam) section
+ (mime-decode-parameter-encode-segment value))))
+ ;; parameter value extensions are not used,
+ ;; or invalid attribute-name (in RFC2231, although valid in RFC2045).
+ (setq dest (cons (cons (downcase (car params))
+;;; ;; decode (invalid!) encoded-words.
+;;; (eword-decode-string
+;;; (decode-mime-charset-string
+;;; (car (cdr params))
+;;; default-mime-charset)
+;;; 'must-unfold)
+ (car (cdr params)))
+ dest)
+ params (cdr params)))
+ (setq params (cdr params)))
+ ;; concat and decode parameters.
+ (while eparams
+ (setq dest (cons (cons (car (car eparams)) ; attribute
+ (mime-decode-parameter-value
+ (mapconcat (function identity)
+ (nth 1 (car eparams)) ; values
+ "")
+ (nth 2 (car eparams)) ; charset
+ (nth 3 (car eparams)) ; language
+ ))
+ dest)
+ eparams (cdr eparams)))
+ dest))
+
+;;; for compatibility with flim-1_13-rfc2231 API.
+(defalias 'mime-parse-parameters-from-list 'mime-decode-parameters)
+(make-obsolete 'mime-parse-parameters-from-list 'mime-decode-parameters)
+
+(defun mime-parse-parameters (tokens)
+ "Parse TOKENS as MIME parameter values.
+Return a property list, which is a list of the form
+\(PARAMETER-NAME1 VALUE1 PARAMETER-NAME2 VALUE2...)."
+ (let (params attribute)
+ (while (and tokens
+ (eq (car (car tokens)) 'tspecials)
+ (string= (cdr (car tokens)) ";")
+ (setq tokens (cdr tokens))
+ (eq (car (car tokens)) 'mime-token)
+ (progn
+ (setq attribute (cdr (car tokens)))
+ (setq tokens (cdr tokens)))
+ (eq (car (car tokens)) 'tspecials)
+ (string= (cdr (car tokens)) "=")
+ (setq tokens (cdr tokens))
+ (memq (car (car tokens)) '(mime-token quoted-string)))
+ (setq params (cons (if (eq (car (car tokens)) 'quoted-string)
+ (std11-strip-quoted-pair (cdr (car tokens)))
+ (cdr (car tokens)))
+ (cons attribute params))
+ tokens (cdr tokens)))
+ (nreverse params)))
+
+
+;;; @@ Content-Type
;;;
;;;###autoload
-(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-parse-Content-Type (field-body)
+ "Parse FIELD-BODY as a Content-Type field.
+FIELD-BODY is a string.
+Return value is a mime-content-type object.
+If FIELD-BODY is not a valid Content-Type field, return nil."
+ (let ((tokens (mime-lexical-analyze field-body)))
+ (when (eq (car (car tokens)) 'mime-token)
+ (let ((primary-type (cdr (car tokens))))
+ (setq tokens (cdr tokens))
+ (when (and (eq (car (car tokens)) 'tspecials)
+ (string= (cdr (car tokens)) "/")
+ (setq tokens (cdr tokens))
+ (eq (car (car tokens)) 'mime-token))
+ (make-mime-content-type
+ (intern (downcase primary-type))
+ (intern (downcase (cdr (car tokens))))
+ (mime-decode-parameters
+ (mime-parse-parameters (cdr tokens)))))))))
;;;###autoload
(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)
+ "Parse field-body of Content-Type field of current-buffer.
+Return value is a mime-content-type object.
+If Content-Type field is not found, return nil."
+ (let ((field-body (std11-field-body "Content-Type")))
+ (if field-body
+ (mime-parse-Content-Type field-body)
)))
-;;; @ Content-Disposition
+;;; @@ Content-Disposition
;;;
-(eval-and-compile
- (defconst mime-disposition-type-regexp mime-token-regexp)
- )
-
;;;###autoload
-(defun mime-parse-Content-Disposition (string)
- "Parse STRING as field-body of Content-Disposition field."
- (setq string (std11-unfold-string string))
- (if (string-match (eval-when-compile
- (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-parse-Content-Disposition (field-body)
+ "Parse FIELD-BODY as a Content-Disposition field.
+FIELD-BODY is a string.
+Return value is a mime-content-disposition object.
+If FIELD-BODY is not a valid Content-Disposition field, return nil."
+ (let ((tokens (mime-lexical-analyze field-body)))
+ (when (eq (car (car tokens)) 'mime-token)
+ (make-mime-content-disposition
+ (intern (downcase (cdr (car tokens))))
+ (mime-decode-parameters
+ (mime-parse-parameters (cdr tokens)))))))
;;;###autoload
(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)
+ "Parse field-body of Content-Disposition field of current-buffer.
+Return value is a mime-content-disposition object.
+If Content-Disposition field is not found, return nil."
+ (let ((field-body (std11-field-body "Content-Disposition")))
+ (if field-body
+ (mime-parse-Content-Disposition field-body)
)))
-;;; @ Content-Transfer-Encoding
+;;; @@ Content-Transfer-Encoding
;;;
;;;###autoload
-(defun mime-parse-Content-Transfer-Encoding (string)
- "Parse STRING as field-body of Content-Transfer-Encoding field."
- (let ((tokens (std11-lexical-analyze string mime-lexical-analyzer))
- token)
- (while (and tokens
- (setq token (car tokens))
- (std11-ignored-token-p token))
- (setq tokens (cdr tokens)))
- (if token
- (if (eq (car token) 'mime-token)
- (downcase (cdr token))
- ))))
+(defun mime-parse-Content-Transfer-Encoding (field-body)
+ "Parse FIELD-BODY as a Content-Transfer-Encoding field.
+FIELD-BODY is a string.
+Return value is a string.
+If FIELD-BODY is not a valid Content-Transfer-Encoding field, return nil."
+ (let ((tokens (mime-lexical-analyze field-body)))
+ (when (eq (car (car tokens)) 'mime-token)
+ (downcase (cdr (car tokens))))))
;;;###autoload
-(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)))
+(defun mime-read-Content-Transfer-Encoding ()
+ "Parse field-body of Content-Transfer-Encoding field of current-buffer.
+Return value is a string.
+If Content-Transfer-Encoding field is not found, return nil."
+ (let ((field-body (std11-field-body "Content-Transfer-Encoding")))
+ (if field-body
+ (mime-parse-Content-Transfer-Encoding field-body)
+ )))
-;;; @ Content-Id / Message-Id
+;;; @@ Content-ID / Message-ID
;;;
;;;###autoload
(defun mime-parse-msg-id (tokens)
- "Parse TOKENS as msg-id of Content-Id or Message-Id field."
+ "Parse TOKENS as msg-id of Content-ID or Message-ID field."
(car (std11-parse-msg-id tokens)))
;;;###autoload
(defun mime-uri-parse-cid (string)
"Parse STRING as cid URI."
- (inline
- (mime-parse-msg-id (cons '(specials . "<")
- (nconc
- (cdr (cdr (std11-lexical-analyze string)))
- '((specials . ">")))))))
+ (mime-parse-msg-id (cons '(specials . "<")
+ (nconc
+ (cdr (cdr (std11-lexical-analyze string)))
+ '((specials . ">"))))))
;;; @ message parser
projects / elisp / lemi.git / blobdiff