;;; rfc2231.el --- Functions for decoding rfc2231 headers
-;; Copyright (C) 1998 Free Software Foundation, Inc.
+;; Copyright (C) 1998,99 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; This file is part of GNU Emacs.
;;; Code:
-(require 'drums)
+(require 'ietf-drums)
(defun rfc2231-get-value (ct attribute)
"Return the value of ATTRIBUTE from CT."
The list will be on the form
`(name (attribute . value) (attribute . value)...)"
(with-temp-buffer
- (let ((ttoken (drums-token-to-list drums-text-token))
- (stoken (drums-token-to-list drums-tspecials))
- (ntoken (drums-token-to-list "0-9"))
+ (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)
- (drums-init (mail-header-remove-whitespace
- (mail-header-remove-comments string)))
- (let ((table (copy-syntax-table drums-syntax-table)))
+ (ietf-drums-init (mail-header-remove-whitespace
+ (mail-header-remove-comments string)))
+ (let ((table (copy-syntax-table ietf-drums-syntax-table)))
(modify-syntax-entry ?\' "w" 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 (following-char))
+ (setq c (char-after))
(when (and (memq c ttoken)
(not (memq c stoken)))
(setq type (downcase (buffer-substring
(point) (progn (forward-sexp 1) (point)))))
;; Do the params
(while (not (eobp))
- (setq c (following-char))
+ (setq c (char-after))
(unless (eq c ?\;)
(error "Invalid header: %s" string))
(forward-char 1)
- (setq c (following-char))
- (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 (following-char))
- (setq encoded nil)
- (when (eq c ?*)
+ ;; 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))
+ (when (memq c ntoken)
+ (setq number
+ (string-to-number
+ (buffer-substring
+ (point) (progn (forward-sexp 1) (point)))))
+ (setq c (char-after))
+ (when (eq c ?*)
+ (setq encoded t)
+ (forward-char 1)
+ (setq c (char-after)))))
+ ;; See if we have any previous continuations.
+ (when (and prev-attribute
+ (not (eq prev-attribute attribute)))
+ (push (cons prev-attribute prev-value) parameters)
+ (setq prev-attribute nil
+ prev-value ""))
+ (unless (eq c ?=)
+ (error "Invalid header: %s" string))
(forward-char 1)
- (setq c (following-char))
- (when (memq c ntoken)
- (setq number
- (string-to-number
- (buffer-substring
- (point) (progn (forward-sexp 1) (point)))))
- (setq c (following-char))
- (when (eq c ?*)
- (setq encoded t)
- (forward-char 1)
- (setq c (following-char)))))
- ;; See if we have any previous continuations.
- (when (and prev-attribute
- (not (eq prev-attribute attribute)))
- (push (cons prev-attribute prev-value) parameters)
- (setq prev-attribute nil
- prev-value ""))
- (unless (eq c ?=)
- (error "Invalid header: %s" string))
- (forward-char 1)
- (setq c (following-char))
- (cond
- ((eq c ?\")
- (setq value
- (buffer-substring (1+ (point))
- (progn (forward-sexp 1) (1- (point))))))
- ((and (memq c ttoken)
- (not (memq c stoken)))
- (setq value (buffer-substring
- (point) (progn (forward-sexp 1) (point)))))
- (t
- (error "Invalid header: %s" string)))
- (when encoded
- (setq value (rfc2231-decode-encoded-string value)))
- (if number
- (setq prev-attribute attribute
- prev-value (concat prev-value value))
- (push (cons attribute value) parameters)))
+ (setq c (char-after))
+ (cond
+ ((eq c ?\")
+ (setq value
+ (buffer-substring (1+ (point))
+ (progn (forward-sexp 1) (1- (point))))))
+ ((and (memq c ttoken)
+ (not (memq c stoken)))
+ (setq value (buffer-substring
+ (point) (progn (forward-sexp 1) (point)))))
+ (t
+ (error "Invalid header: %s" string)))
+ (when encoded
+ (setq value (rfc2231-decode-encoded-string value)))
+ (if number
+ (setq prev-attribute attribute
+ prev-value (concat prev-value value))
+ (push (cons attribute value) parameters))))
;; Take care of any final continuations.
(when prev-attribute
(push (cons prev-attribute prev-value) parameters))
- `(,type ,@(nreverse parameters))))))
+ (when type
+ `(,type ,@(nreverse parameters)))))))
(defun rfc2231-decode-encoded-string (string)
"Decode an RFC2231-encoded string.
(intern (car elems))))
(buffer-string))))
+(defun rfc2231-encode-string (param value)
+ "Return and PARAM=VALUE string encoded according to RFC2231."
+ (let ((control (ietf-drums-token-to-list ietf-drums-no-ws-ctl-token))
+ (tspecial (ietf-drums-token-to-list ietf-drums-tspecials))
+ (special (ietf-drums-token-to-list "*'%\n\t"))
+ (ascii (ietf-drums-token-to-list ietf-drums-text-token))
+ (num -1)
+ spacep encodep charsetp charset broken)
+ (with-temp-buffer
+ (insert value)
+ (goto-char (point-min))
+ (while (not (eobp))
+ (cond
+ ((or (memq (following-char) control)
+ (memq (following-char) tspecial)
+ (memq (following-char) special))
+ (setq encodep t))
+ ((eq (following-char) ? )
+ (setq spacep t))
+ ((not (memq (following-char) ascii))
+ (setq charsetp t)))
+ (forward-char 1))
+ (when charsetp
+ (setq charset (mm-encode-body)))
+ (cond
+ ((or encodep charsetp)
+ (goto-char (point-min))
+ (while (not (eobp))
+ (when (> (current-column) 60)
+ (insert "\n")
+ (setq broken t))
+ (if (or (not (memq (following-char) ascii))
+ (memq (following-char) control)
+ (memq (following-char) tspecial)
+ (memq (following-char) special)
+ (eq (following-char) ? ))
+ (progn
+ (insert "%" (format "%02x" (following-char)))
+ (delete-char 1))
+ (forward-char 1)))
+ (goto-char (point-min))
+ (insert (or charset "ascii") "''")
+ (goto-char (point-min))
+ (if (not broken)
+ (insert param "*=")
+ (while (not (eobp))
+ (insert param "*" (format "%d" (incf num)) "*=")
+ (forward-line 1))))
+ (spacep
+ (goto-char (point-min))
+ (insert param "=\"")
+ (goto-char (point-max))
+ (insert "\""))
+ (t
+ (goto-char (point-min))
+ (insert param "=")))
+ (buffer-string))))
+
(provide 'rfc2231)
;;; rfc2231.el ends here
projects / elisp / gnus.git- / blobdiff