;;; rfc2231.el --- Functions for decoding rfc2231 headers
-;; Copyright (C) 1998,99 Free Software Foundation, Inc.
+
+;; Copyright (C) 1998-2011 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; This file is part of GNU Emacs.
-;; GNU Emacs is free software; you can redistribute it and/or modify
+;; 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.
+;; the Free Software Foundation, either version 3 of the License, 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
+;; 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.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
(eval-when-compile (require 'cl))
(require 'ietf-drums)
(require 'rfc2047)
+(autoload 'mm-encode-body "mm-bodies")
+(autoload 'mail-header-remove-whitespace "mail-parse")
+(autoload 'mail-header-remove-comments "mail-parse")
(defun rfc2231-get-value (ct attribute)
"Return the value of ATTRIBUTE from CT."
N.B. This is in violation with RFC2047, but it seem to be in common use."
(rfc2231-parse-string (rfc2047-decode-string string)))
-(defun rfc2231-parse-string (string)
+(defun rfc2231-parse-string (string &optional signal-error)
"Parse STRING and return a list.
The list will be on the form
- `(name (attribute . value) (attribute . value)...)"
+ `(name (attribute . value) (attribute . value)...)'.
+
+If the optional SIGNAL-ERROR is non-nil, signal an error when this
+function fails in parsing of parameters. Otherwise, this function
+must never cause a Lisp error."
(with-temp-buffer
(let ((ttoken (ietf-drums-token-to-list ietf-drums-text-token))
(stoken (ietf-drums-token-to-list ietf-drums-tspecials))
(ntoken (ietf-drums-token-to-list "0-9"))
- (prev-value "")
- display-name mailbox c display-string parameters
- attribute value type subtype number encoded
- prev-attribute)
- (ietf-drums-init (mail-header-remove-whitespace
- (mail-header-remove-comments string)))
+ c type attribute encoded number parameters value)
+ (ietf-drums-init
+ (condition-case nil
+ (mail-header-remove-whitespace
+ (mail-header-remove-comments string))
+ ;; The most likely cause of an error is unbalanced parentheses
+ ;; or double-quotes. If all parentheses and double-quotes are
+ ;; quoted meaninglessly with backslashes, removing them might
+ ;; make it parseable. Let's try...
+ (error
+ (let (mod)
+ (when (and (string-match "\\\\\"" string)
+ (not (string-match "\\`\"\\|[^\\]\"" string)))
+ (setq string (mm-replace-in-string string "\\\\\"" "\"")
+ mod t))
+ (when (and (string-match "\\\\(" string)
+ (string-match "\\\\)" string)
+ (not (string-match "\\`(\\|[^\\][()]" string)))
+ (setq string (mm-replace-in-string string "\\\\\\([()]\\)" "\\1")
+ mod t))
+ (or (and mod
+ (ignore-errors
+ (mail-header-remove-whitespace
+ (mail-header-remove-comments string))))
+ ;; Finally, attempt to extract only type.
+ (if (string-match
+ (concat "\\`[\t\n ]*\\([^" ietf-drums-tspecials "\t\n ]+"
+ "\\(?:/[^" ietf-drums-tspecials
+ "\t\n ]+\\)?\\)\\(?:[\t\n ;]\\|\\'\\)")
+ string)
+ (match-string 1 string)
+ ""))))))
(let ((table (copy-syntax-table ietf-drums-syntax-table)))
(modify-syntax-entry ?\' "w" table)
+ (modify-syntax-entry ?* " " table)
+ (modify-syntax-entry ?\; " " table)
+ (modify-syntax-entry ?= " " table)
;; The following isn't valid, but one should be liberal
;; in what one receives.
(modify-syntax-entry ?\: "w" table)
(set-syntax-table table))
(setq c (char-after))
(when (and (memq c ttoken)
- (not (memq c stoken)))
- (setq type (downcase (buffer-substring
- (point) (progn (forward-sexp 1) (point)))))
+ (not (memq c stoken))
+ (setq type (ignore-errors
+ (downcase
+ (buffer-substring (point) (progn
+ (forward-sexp 1)
+ (point)))))))
;; Do the params
- (while (not (eobp))
- (setq c (char-after))
- (unless (eq c ?\;)
- (error "Invalid header: %s" string))
- (forward-char 1)
- ;; If c in nil, then this is an invalid header, but
- ;; since elm generates invalid headers on this form,
- ;; we allow it.
- (when (setq c (char-after))
- (if (and (memq c ttoken)
- (not (memq c stoken)))
- (setq attribute
- (intern
- (downcase
- (buffer-substring
- (point) (progn (forward-sexp 1) (point))))))
- (error "Invalid header: %s" string))
- (setq c (char-after))
- (setq encoded nil)
- (when (eq c ?*)
- (forward-char 1)
- (setq c (char-after))
- (if (not (memq c ntoken))
- (setq encoded t
- number nil)
- (setq number
- (string-to-number
- (buffer-substring
- &
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