1 ;;; mailcap.el --- MIME media types configuration
2 ;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004
3 ;; Free Software Foundation, Inc.
5 ;; Author: William M. Perry <wmperry@aventail.com>
6 ;; Lars Magne Ingebrigtsen <larsi@gnus.org>
7 ;; Keywords: news, mail, multimedia
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software; you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 2, or (at your option)
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 ;; Boston, MA 02111-1307, USA.
28 ;; Provides configuration of MIME media types from directly from Lisp
29 ;; and via the usual mailcap mechanism (RFC 1524). Deals with
30 ;; mime.types similarly.
34 (eval-when-compile (require 'cl))
39 "Definition of viewers for MIME types."
43 (defvar mailcap-parse-args-syntax-table
44 (let ((table (copy-syntax-table emacs-lisp-mode-syntax-table)))
45 (modify-syntax-entry ?' "\"" table)
46 (modify-syntax-entry ?` "\"" table)
47 (modify-syntax-entry ?{ "(" table)
48 (modify-syntax-entry ?} ")" table)
50 "A syntax table for parsing SGML attributes.")
53 (when (featurep 'xemacs)
58 (defvar mailcap-print-command
60 (cons (if (boundp 'lpr-command)
63 (when (boundp 'lpr-switches)
64 (if (stringp lpr-switches)
68 "Shell command (including switches) used to print Postscript files.")
70 ;; Postpone using defcustom for this as it's so big and we essentially
71 ;; have to have two copies of the data around then. Perhaps just
72 ;; customize the Lisp viewers and rely on the normal configuration
73 ;; files for the rest? -- fx
74 (defvar mailcap-mime-data
77 (viewer . "gnumeric %s")
78 (test . (getenv "DISPLAY"))
79 (type . "application/vnd.ms-excel"))
81 (viewer . ssl-view-site-cert)
82 (test . (fboundp 'ssl-view-site-cert))
83 (type . "application/x-x509-ca-cert"))
85 (viewer . ssl-view-user-cert)
86 (test . (fboundp 'ssl-view-user-cert))
87 (type . "application/x-x509-user-cert"))
89 (viewer . mailcap-save-binary-file)
91 (type . "application/octet-stream"))
93 (viewer . "xdvi -safer %s")
94 (test . (eq window-system 'x))
96 (type . "application/dvi")
97 ("print" . "dvips -qRP %s"))
99 (viewer . "dvitty %s")
100 (test . (not (getenv "DISPLAY")))
101 (type . "application/dvi")
102 ("print" . "dvips -qRP %s"))
104 (viewer . mailcap-maybe-eval)
105 (type . "application/emacs-lisp"))
107 (viewer . mailcap-maybe-eval)
108 (type . "application/x-emacs-lisp"))
110 (viewer . mailcap-save-binary-file)
112 (type . "application/x-tar"))
115 (test . (fboundp 'tex-mode))
116 (type . "application/x-latex"))
119 (test . (fboundp 'tex-mode))
120 (type . "application/x-tex"))
123 (test . (fboundp 'tex-mode))
124 (type . "application/latex"))
127 (test . (fboundp 'tex-mode))
128 (type . "application/tex"))
130 (viewer . texinfo-mode)
131 (test . (fboundp 'texinfo-mode))
132 (type . "application/tex"))
134 (viewer . mailcap-save-binary-file)
136 (type . "application/zip")
138 ;; Prefer free viewers.
140 (viewer . "gv -safer %s")
141 (type . "application/pdf")
142 (test . window-system)
143 ("print" . ,(concat "pdf2ps %s - | " mailcap-print-command)))
146 (type . "application/pdf")
147 ("print" . ,(concat "pdftops %s - | " mailcap-print-command))
148 (test . (eq window-system 'x)))
150 (viewer . "acroread %s")
151 (type . "application/pdf")
152 ("print" . ,(concat "cat %s | acroread -toPostScript | "
153 mailcap-print-command))
154 (test . window-system))
156 (viewer . ,(concat "pdftotext %s -"))
157 (type . "application/pdf")
158 ("print" . ,(concat "pdftops %s - | " mailcap-print-command))
161 (viewer . "gv -safer %s")
162 (type . "application/postscript")
163 (test . window-system)
164 ("print" . ,(concat mailcap-print-command " %s"))
167 (viewer . "ghostview -dSAFER %s")
168 (type . "application/postscript")
169 (test . (eq window-system 'x))
170 ("print" . ,(concat mailcap-print-command " %s"))
173 (viewer . "ps2ascii %s")
174 (type . "application/postscript")
175 (test . (not (getenv "DISPLAY")))
176 ("print" . ,(concat mailcap-print-command " %s"))
179 (viewer . sieve-mode)
180 (test . (fboundp 'sieve-mode))
181 (type . "application/sieve"))
183 (viewer . "gpg --import --interactive --verbose")
184 (type . "application/pgp-keys")
188 (viewer . "maplay %s")
189 (type . "audio/x-mpeg"))
191 (viewer . "showaudio")
195 (viewer . mm-view-message)
196 (test . (and (featurep 'gnus)
198 (type . "message/rfc822"))
201 (test . (fboundp 'vm-mode))
202 (type . "message/rfc822"))
205 (test . (fboundp 'w3-mode))
206 (type . "message/rfc822"))
209 (type . "message/rfc822")))
212 (viewer . "xwud -in %s")
213 (type . "image/x-xwd")
214 ("compose" . "xwd -frame > %s")
215 (test . (eq window-system 'x))
218 (viewer . "xwud -in %s")
219 (type . "image/x-xwd")
220 ("compose" . "xwd -frame > %s")
221 (test . (eq window-system 'x))
224 (viewer . "xwud -in %s")
225 (type . "image/x-xwd")
226 ("compose" . "xwd -frame > %s")
227 (test . (eq window-system 'x))
230 (viewer . "display %s")
232 (test . (eq window-system 'x))
237 (test . (eq window-system 'x))
242 (test . (fboundp 'w3-mode))
243 (type . "text/plain"))
246 (test . (fboundp 'view-mode))
247 (type . "text/plain"))
249 (viewer . fundamental-mode)
250 (type . "text/plain"))
252 (viewer . enriched-decode)
253 (test . (fboundp 'enriched-decode))
254 (type . "text/enriched"))
256 (viewer . mm-w3-prepare-buffer)
257 (test . (fboundp 'w3-prepare-buffer))
258 (type . "text/html"))
261 (test . (fboundp 'dns-mode))
262 (type . "text/dns")))
265 (viewer . "mpeg_play %s")
266 (type . "video/mpeg")
267 (test . (eq window-system 'x))
271 (viewer . "webspace -remote %s -URL %u")
272 (type . "x-world/x-vrml")
278 (type . "archive/tar")
279 (test . (fboundp 'tar-mode)))))
280 "The mailcap structure is an assoc list of assoc lists.
281 1st assoc list is keyed on the major content-type
282 2nd assoc list is keyed on the minor content-type (which can be a regexp)
287 (\"postscript\" . <info>))
289 (\"plain\" . <info>)))
291 Where <info> is another assoc list of the various information
292 related to the mailcap RFC 1524. This is keyed on the lowercase
293 attribute name (viewer, test, etc). This looks like:
294 ((viewer . VIEWERINFO)
299 Where VIEWERINFO specifies how the content-type is viewed. Can be
300 a string, in which case it is run through a shell, with
301 appropriate parameters, or a symbol, in which case the symbol is
302 `funcall'ed, with the buffer as an argument.
304 TESTINFO is a test for the viewer's applicability, or nil. If nil, it
305 means the viewer is always valid. If it is a Lisp function, it is
306 called with a list of items from any extra fields from the
307 Content-Type header as argument to return a boolean value for the
308 validity. Otherwise, if it is a non-function Lisp symbol or list
309 whose car is a symbol, it is `eval'led to yield the validity. If it
310 is a string or list of strings, it represents a shell command to run
311 to return a true or false shell value for the validity.")
312 (put 'mailcap-mime-data 'risky-local-variable t)
314 (defcustom mailcap-download-directory nil
315 "*Directory to which `mailcap-save-binary-file' downloads files by default.
316 nil means your home directory."
317 :type '(choice (const :tag "Home directory" nil)
321 (defvar mailcap-poor-system-types
322 '(ms-dos ms-windows windows-nt win32 w32 mswindows)
323 "Systems that don't have a Unix-like directory hierarchy.")
326 ;;; Utility functions
329 (defun mailcap-save-binary-file ()
330 (goto-char (point-min))
332 (let ((file (read-file-name
333 "Filename to save as: "
334 (or mailcap-download-directory "~/")))
335 (require-final-newline nil))
336 (write-region (point-min) (point-max) file))
337 (kill-buffer (current-buffer))))
339 (defvar mailcap-maybe-eval-warning
342 This MIME part contains untrusted and possibly harmful content.
343 If you evaluate the Emacs Lisp code contained in it, a lot of nasty
344 things can happen. Please examine the code very carefully before you
345 instruct Emacs to evaluate it. You can browse the buffer containing
346 the code using \\[scroll-other-window].
348 If you are unsure what to do, please answer \"no\"."
349 "Text of warning message displayed by `mailcap-maybe-eval'.
350 Make sure that this text consists only of few text lines. Otherwise,
351 Gnus might fail to display all of it.")
353 (defun mailcap-maybe-eval ()
354 "Maybe evaluate a buffer of Emacs Lisp code."
355 (let ((lisp-buffer (current-buffer)))
356 (goto-char (point-min))
358 (save-window-excursion
359 (delete-other-windows)
360 (let ((buffer (get-buffer-create (generate-new-buffer-name
363 (with-current-buffer buffer
364 (insert (substitute-command-keys
365 mailcap-maybe-eval-warning))
366 (goto-char (point-min))
367 (display-buffer buffer)
368 (yes-or-no-p "This is potentially dangerous emacs-lisp code, evaluate it? "))
369 (kill-buffer buffer))))
370 (eval-buffer (current-buffer)))
371 (when (buffer-live-p lisp-buffer)
372 (with-current-buffer lisp-buffer
373 (emacs-lisp-mode)))))
377 ;;; The mailcap parser
380 (defun mailcap-replace-regexp (regexp to-string)
381 ;; Quiet replace-regexp.
382 (goto-char (point-min))
383 (while (re-search-forward regexp nil t)
384 (replace-match to-string t nil)))
386 (defvar mailcap-parsed-p nil)
388 (defun mailcap-parse-mailcaps (&optional path force)
389 "Parse out all the mailcaps specified in a path string PATH.
390 Components of PATH are separated by the `path-separator' character
391 appropriate for this system. If FORCE, re-parse even if already
392 parsed. If PATH is omitted, use the value of environment variable
393 MAILCAPS if set; otherwise (on Unix) use the path from RFC 1524, plus
394 /usr/local/etc/mailcap."
395 (interactive (list nil t))
396 (when (or (not mailcap-parsed-p)
400 ((getenv "MAILCAPS") (setq path (getenv "MAILCAPS")))
401 ((memq system-type mailcap-poor-system-types)
402 (setq path '("~/.mailcap" "~/mail.cap" "~/etc/mail.cap")))
404 ;; This is per RFC 1524, specifically
405 ;; with /usr before /usr/local.
406 '("~/.mailcap" "/etc/mailcap" "/usr/etc/mailcap"
407 "/usr/local/etc/mailcap"))))
408 (let ((fnames (reverse
410 (delete "" (split-string path path-separator))
414 (setq fname (car fnames))
415 (if (and (file-readable-p fname)
416 (file-regular-p fname))
417 (mailcap-parse-mailcap fname))
418 (setq fnames (cdr fnames))))
419 (setq mailcap-parsed-p t)))
421 (defun mailcap-parse-mailcap (fname)
422 "Parse out the mailcap file specified by FNAME."
423 (let (major ; The major mime type (image/audio/etc)
424 minor ; The minor mime type (gif, basic, etc)
425 save-pos ; Misc saved positions used in parsing
426 viewer ; How to view this mime type
427 info ; Misc info about this mime type
430 (insert-file-contents fname)
431 (set-syntax-table mailcap-parse-args-syntax-table)
432 (mailcap-replace-regexp "#.*" "") ; Remove all comments
433 (mailcap-replace-regexp "\\\\[ \t]*\n" " ") ; And collapse spaces
434 (mailcap-replace-regexp "\n+" "\n") ; And blank lines
435 (goto-char (point-max))
436 (skip-chars-backward " \t\n")
437 (delete-region (point) (point-max))
439 (skip-chars-backward " \t\n")
441 (setq save-pos (point)
443 (skip-chars-forward "^/; \t\n")
444 (downcase-region save-pos (point))
445 (setq major (buffer-substring save-pos (point)))
446 (skip-chars-forward " \t")
448 (when (eq (char-after) ?/)
450 (skip-chars-forward " \t")
451 (setq save-pos (point))
452 (skip-chars-forward "^; \t\n")
453 (downcase-region save-pos (point))
456 ((eq ?* (or (char-after save-pos) 0)) ".*")
457 ((= (point) save-pos) ".*")
458 (t (regexp-quote (buffer-substring save-pos (point)))))))
459 (skip-chars-forward " \t")
460 ;;; Got the major/minor chunks, now for the viewers/etc
461 ;;; The first item _must_ be a viewer, according to the
462 ;;; RFC for mailcap files (#1524)
464 (when (eq (char-after) ?\;)
466 (skip-chars-forward " \t")
467 (setq save-pos (point))
468 (skip-chars-forward "^;\n")
470 (while (eq (char-before) ?\\)
471 (backward-delete-char 1)
473 (skip-chars-forward "^;\n"))
474 (if (eq (or (char-after save-pos) 0) ?')
476 (narrow-to-region (1+ save-pos) (point))
477 (goto-char (point-min))
479 (read (current-buffer))
480 (goto-char (point-max))
482 (setq viewer (buffer-substring save-pos (point)))))
483 (setq save-pos (point))
485 (unless (equal viewer "")
486 (setq info (nconc (list (cons 'viewer viewer)
487 (cons 'type (concat major "/"
488 (if (string= minor ".*")
490 (mailcap-parse-mailcap-extras save-pos (point))))
491 (mailcap-mailcap-entry-passes-test info)
492 (mailcap-add-mailcap-entry major minor info))
493 (beginning-of-line)))))
495 (defun mailcap-parse-mailcap-extras (st nd)
496 "Grab all the extra stuff from a mailcap entry."
500 results ; Assoc list of results
501 name-pos ; Start of XXXX= position
502 val-pos ; Start of value position
503 done ; Found end of \'d ;s?
506 (narrow-to-region st nd)
507 (goto-char (point-min))
508 (skip-chars-forward " \n\t;")
511 (setq name-pos (point))
512 (skip-chars-forward "^ \n\t=;")
513 (downcase-region name-pos (point))
514 (setq name (buffer-substring name-pos (point)))
515 (skip-chars-forward " \t\n")
516 (if (not (eq (char-after (point)) ?=)) ; There is no value
518 (skip-chars-forward " \t\n=")
519 (setq val-pos (point))
520 (if (memq (char-after val-pos) '(?\" ?'))
522 (setq val-pos (1+ val-pos))
527 (error (goto-char (point-max)))))
529 (skip-chars-forward "^;")
530 (if (eq (char-after (1- (point))) ?\\ )
532 (subst-char-in-region (1- (point)) (point) ?\\ ? )
533 (skip-chars-forward ";"))
535 (setq value (buffer-substring val-pos (point))))
536 (setq results (cons (cons name value) results))
537 (skip-chars-forward " \";\n\t"))
540 (defun mailcap-mailcap-entry-passes-test (info)
541 "Return non-nil iff mailcap entry INFO passes its test clause.
542 Also return non-nil if no test clause is present."
543 (let ((test (assq 'test info)) ; The test clause
545 (setq status (and test (split-string (cdr test) " ")))
546 (if (and (or (assoc "needsterm" info)
547 (assoc "needsterminal" info)
548 (assoc "needsx11" info))
549 (not (getenv "DISPLAY")))
552 ((and (equal (nth 0 status) "test")
553 (equal (nth 1 status) "-n")
554 (or (equal (nth 2 status) "$DISPLAY")
555 (equal (nth 2 status) "\"$DISPLAY\"")))
556 (setq status (if (getenv "DISPLAY") t nil)))
557 ((and (equal (nth 0 status) "test")
558 (equal (nth 1 status) "-z")
559 (or (equal (nth 2 status) "$DISPLAY")
560 (equal (nth 2 status) "\"$DISPLAY\"")))
561 (setq status (if (getenv "DISPLAY") nil t)))
564 (and test (listp test) (setcdr test status))))
567 ;;; The action routines.
570 (defun mailcap-possible-viewers (major minor)
571 "Return a list of possible viewers from MAJOR for minor type MINOR."
576 ((equal (car (car major)) minor)
577 (setq exact (cons (cdr (car major)) exact)))
578 ((and minor (string-match (concat "^" (car (car major)) "$") minor))
579 (setq wildcard (cons (cdr (car major)) wildcard))))
580 (setq major (cdr major)))
581 (nconc exact wildcard)))
583 (defun mailcap-unescape-mime-test (test type-info)
584 (let (save-pos save-chr subst)
586 ((symbolp test) test)
587 ((and (listp test) (symbolp (car test))) test)
589 (and (listp test) (stringp (car test))
590 (setq test (mapconcat 'identity test " "))))
593 (goto-char (point-min))
595 (skip-chars-forward "^%")
597 (progn (skip-chars-backward "\\\\")
599 0) ; It is an escaped %
602 (skip-chars-forward "%."))
603 (setq save-pos (point))
604 (skip-chars-forward "%")
605 (setq save-chr (char-after (point)))
607 ;; %s: name of a file for the body data
609 ;; %{<parameter name}: value of parameter in mailcap entry
610 ;; %n: number of sub-parts for multipart content-type
611 ;; %F: a set of content-type/filename pairs for multiparts
613 ((null save-chr) nil)
615 (delete-region save-pos (progn (forward-char 1) (point)))
616 (insert (or (cdr (assq 'type type-info)) "\"\"")))
617 ((memq save-chr '(?M ?n ?F))
618 (delete-region save-pos (progn (forward-char 1) (point)))
622 (skip-chars-forward "^}")
623 (downcase-region (+ 2 save-pos) (point))
624 (setq subst (buffer-substring (+ 2 save-pos) (point)))
625 (delete-region save-pos (1+ (point)))
626 (insert (or (cdr (assoc subst type-info)) "\"\"")))
629 (t (error "Bad value to mailcap-unescape-mime-test: %s" test)))))
631 (defvar mailcap-viewer-test-cache nil)
633 (defun mailcap-viewer-passes-test (viewer-info type-info)
634 "Return non-nil iff viewer specified by VIEWER-INFO passes its test clause.
635 Also return non-nil if it has no test clause. TYPE-INFO is an argument
636 to supply to the test."
637 (let* ((test-info (assq 'test viewer-info))
638 (test (cdr test-info))
640 (viewer (cdr (assoc 'viewer viewer-info)))
641 (default-directory (expand-file-name "~/"))
642 status parsed-test cache result)
643 (if (setq cache (assoc test mailcap-viewer-test-cache))
648 ((not test-info) t) ; No test clause
649 ((not test) nil) ; Already failed test
650 ((eq test t) t) ; Already passed test
651 ((functionp test) ; Lisp function as test
652 (funcall test type-info))
653 ((and (symbolp test) ; Lisp variable as test
656 ((and (listp test) ; List to be eval'd
657 (symbolp (car test)))
660 (setq test (mailcap-unescape-mime-test test type-info)
661 test (list shell-file-name nil nil nil
662 shell-command-switch test)
663 status (apply 'call-process test))
665 (push (list otest result) mailcap-viewer-test-cache)
668 (defun mailcap-add-mailcap-entry (major minor info)
669 (let ((old-major (assoc major mailcap-mime-data)))
670 (if (null old-major) ; New major area
671 (setq mailcap-mime-data
672 (cons (cons major (list (cons minor info)))
674 (let ((cur-minor (assoc minor old-major)))
676 ((or (null cur-minor) ; New minor area, or
677 (assq 'test info)) ; Has a test, insert at beginning
678 (setcdr old-major (cons (cons minor info) (cdr old-major))))
679 ((and (not (assq 'test info)) ; No test info, replace completely
680 (not (assq 'test cur-minor))
681 (equal (assq 'viewer info) ; Keep alternative viewer
682 (assq 'viewer cur-minor)))
683 (setcdr cur-minor info))
685 (setcdr old-major (cons (cons minor info) (cdr old-major))))))
688 (defun mailcap-add (type viewer &optional test)
689 "Add VIEWER as a handler for TYPE.
690 If TEST is not given, it defaults to t."
691 (let ((tl (split-string type "/")))
692 (when (or (not (car tl))
694 (error "%s is not a valid MIME type" type))
695 (mailcap-add-mailcap-entry
698 (test . ,(if test test t))
705 (defun mailcap-viewer-lessp (x y)
706 "Return t iff viewer X is more desirable than viewer Y."
707 (let ((x-wild (string-match "[*?]" (or (cdr-safe (assq 'type x)) "")))
708 (y-wild (string-match "[*?]" (or (cdr-safe (assq 'type y)) "")))
709 (x-lisp (not (stringp (or (cdr-safe (assq 'viewer x)) ""))))
710 (y-lisp (not (stringp (or (cdr-safe (assq 'viewer y)) "")))))
712 ((and x-wild (not y-wild))
714 ((and (not x-wild) y-wild)
716 ((and (not y-lisp) x-lisp)
720 (defun mailcap-mime-info (string &optional request)
721 "Get the MIME viewer command for STRING, return nil if none found.
722 Expects a complete content-type header line as its argument.
724 Second argument REQUEST specifies what information to return. If it is
725 nil or the empty string, the viewer (second field of the mailcap
726 entry) will be returned. If it is a string, then the mailcap field
727 corresponding to that string will be returned (print, description,
728 whatever). If a number, then all the information for this specific
729 viewer is returned. If `all', then all possible viewers for
730 this type is returned."
732 major ; Major encoding (text, etc)
733 minor ; Minor encoding (html, etc)
735 save-pos ; Misc. position during parse
736 major-info ; (assoc major mailcap-mime-data)
737 minor-info ; (assoc minor major-info)
738 test ; current test proc.
739 viewers ; Possible viewers
740 passed ; Viewers that passed the test
741 viewer ; The one and only viewer
744 (setq ctl (mail-header-parse-content-type (or string "text/plain")))
745 (setq major (split-string (car ctl) "/"))
746 (setq minor (cadr major)
748 (when (setq major-info (cdr (assoc major mailcap-mime-data)))
749 (when (setq viewers (mailcap-possible-viewers major-info minor))
750 (setq info (mapcar (lambda (a) (cons (symbol-name (car a))
754 (if (mailcap-viewer-passes-test (car viewers) info)
755 (setq passed (cons (car viewers) passed)))
756 (setq viewers (cdr viewers)))
757 (setq passed (sort passed 'mailcap-viewer-lessp))
758 (setq viewer (car passed))))
759 (when (and (stringp (cdr (assq 'viewer viewer)))
761 (setq viewer (car passed)))
763 ((and (null viewer) (not (equal major "default")) request)
764 (mailcap-mime-info "default" request))
765 ((or (null request) (equal request ""))
766 (mailcap-unescape-mime-test (cdr (assq 'viewer viewer)) info))
768 (mailcap-unescape-mime-test
769 (cdr-safe (assoc request viewer)) info))
773 ;; MUST make a copy *sigh*, else we modify mailcap-mime-data
774 (setq viewer (copy-sequence viewer))
775 (let ((view (assq 'viewer viewer))
776 (test (assq 'test viewer)))
777 (if view (setcdr view (mailcap-unescape-mime-test (cdr view) info)))
778 (if test (setcdr test (mailcap-unescape-mime-test (cdr test) info))))
782 ;;; Experimental MIME-types parsing
785 (defvar mailcap-mime-extensions
786 '(("" . "text/plain")
787 (".abs" . "audio/x-mpeg")
788 (".aif" . "audio/aiff")
789 (".aifc" . "audio/aiff")
790 (".aiff" . "audio/aiff")
791 (".ano" . "application/x-annotator")
792 (".au" . "audio/ulaw")
793 (".avi" . "video/x-msvideo")
794 (".bcpio" . "application/x-bcpio")
795 (".bin" . "application/octet-stream")
796 (".cdf" . "application/x-netcdr")
797 (".cpio" . "application/x-cpio")
798 (".csh" . "application/x-csh")
799 (".css" . "text/css")
800 (".dvi" . "application/x-dvi")
801 (".diff" . "text/x-patch")
802 (".el" . "application/emacs-lisp")
803 (".eps" . "application/postscript")
804 (".etx" . "text/x-setext")
805 (".exe" . "application/octet-stream")
806 (".fax" . "image/x-fax")
807 (".gif" . "image/gif")
808 (".hdf" . "application/x-hdf")
809 (".hqx" . "application/mac-binhex40")
810 (".htm" . "text/html")
811 (".html" . "text/html")
812 (".icon" . "image/x-icon")
813 (".ief" . "image/ief")
814 (".jpg" . "image/jpeg")
815 (".macp" . "image/x-macpaint")
816 (".man" . "application/x-troff-man")
817 (".me" . "application/x-troff-me")
818 (".mif" . "application/mif")
819 (".mov" . "video/quicktime")
820 (".movie" . "video/x-sgi-movie")
821 (".mp2" . "audio/x-mpeg")
822 (".mp3" . "audio/x-mpeg")
823 (".mp2a" . "audio/x-mpeg2")
824 (".mpa" . "audio/x-mpeg")
825 (".mpa2" . "audio/x-mpeg2")
826 (".mpe" . "video/mpeg")
827 (".mpeg" . "video/mpeg")
828 (".mpega" . "audio/x-mpeg")
829 (".mpegv" . "video/mpeg")
830 (".mpg" . "video/mpeg")
831 (".mpv" . "video/mpeg")
832 (".ms" . "application/x-troff-ms")
833 (".nc" . "application/x-netcdf")
834 (".nc" . "application/x-netcdf")
835 (".oda" . "application/oda")
836 (".patch" . "text/x-patch")
837 (".pbm" . "image/x-portable-bitmap")
838 (".pdf" . "application/pdf")
839 (".pgm" . "image/portable-graymap")
840 (".pict" . "image/pict")
841 (".png" . "image/png")
842 (".pnm" . "image/x-portable-anymap")
843 (".ppm" . "image/portable-pixmap")
844 (".ps" . "application/postscript")
845 (".qt" . "video/quicktime")
846 (".ras" . "image/x-raster")
847 (".rgb" . "image/x-rgb")
848 (".rtf" . "application/rtf")
849 (".rtx" . "text/richtext")
850 (".sh" . "application/x-sh")
851 (".sit" . "application/x-stuffit")
852 (".siv" . "application/sieve")
853 (".snd" . "audio/basic")
854 (".soa" . "text/dns")
855 (".src" . "application/x-wais-source")
856 (".tar" . "archive/tar")
857 (".tcl" . "application/x-tcl")
858 (".tex" . "application/x-tex")
859 (".texi" . "application/texinfo")
860 (".tga" . "image/x-targa")
861 (".tif" . "image/tiff")
862 (".tiff" . "image/tiff")
863 (".tr" . "application/x-troff")
864 (".troff" . "application/x-troff")
865 (".tsv" . "text/tab-separated-values")
866 (".txt" . "text/plain")
867 (".vbs" . "video/mpeg")
868 (".vox" . "audio/basic")
869 (".vrml" . "x-world/x-vrml")
870 (".wav" . "audio/x-wav")
871 (".xls" . "application/vnd.ms-excel")
872 (".wrl" . "x-world/x-vrml")
873 (".xbm" . "image/xbm")
874 (".xpm" . "image/xpm")
875 (".xwd" . "image/windowdump")
876 (".zip" . "application/zip")
877 (".ai" . "application/postscript")
878 (".jpe" . "image/jpeg")
879 (".jpeg" . "image/jpeg"))
880 "An alist of file extensions and corresponding MIME content-types.
881 This exists for you to customize the information in Lisp. It is
882 merged with values from mailcap files by `mailcap-parse-mimetypes'.")
884 (defvar mailcap-mimetypes-parsed-p nil)
886 (defun mailcap-parse-mimetypes (&optional path force)
887 "Parse out all the mimetypes specified in a Unix-style path string PATH.
888 Components of PATH are separated by the `path-separator' character
889 appropriate for this system. If PATH is omitted, use the value of
890 environment variable MIMETYPES if set; otherwise use a default path.
891 If FORCE, re-parse even if already parsed."
892 (interactive (list nil t))
893 (when (or (not mailcap-mimetypes-parsed-p)
897 ((getenv "MIMETYPES") (setq path (getenv "MIMETYPES")))
898 ((memq system-type mailcap-poor-system-types)
899 (setq path '("~/mime.typ" "~/etc/mime.typ")))
901 ;; mime.types seems to be the normal name, definitely so
902 ;; on current GNUish systems. The search order follows
906 "/usr/etc/mime.types"
907 "/usr/local/etc/mime.types"
908 "/usr/local/www/conf/mime.types"
911 "/usr/etc/mime-types"
912 "/usr/local/etc/mime-types"
913 "/usr/local/www/conf/mime-types"))))
914 (let ((fnames (reverse (if (stringp path)
915 (delete "" (split-string path path-separator))
919 (setq fname (car fnames))
920 (if (and (file-readable-p fname))
921 (mailcap-parse-mimetype-file fname))
922 (setq fnames (cdr fnames))))
923 (setq mailcap-mimetypes-parsed-p t)))
925 (defun mailcap-parse-mimetype-file (fname)
926 "Parse out a mime-types file FNAME."
927 (let (type ; The MIME type for this line
928 extns ; The extensions for this line
929 save-pos ; Misc. saved buffer positions
932 (insert-file-contents fname)
933 (mailcap-replace-regexp "#.*" "")
934 (mailcap-replace-regexp "\n+" "\n")
935 (mailcap-replace-regexp "[ \t]+$" "")
936 (goto-char (point-max))
937 (skip-chars-backward " \t\n")
938 (delete-region (point) (point-max))
939 (goto-char (point-min))
941 (skip-chars-forward " \t\n")
942 (setq save-pos (point))
943 (skip-chars-forward "^ \t\n")
944 (downcase-region save-pos (point))
945 (setq type (buffer-substring save-pos (point)))
947 (skip-chars-forward " \t")
948 (setq save-pos (point))
949 (skip-chars-forward "^ \t\n")
950 (setq extns (cons (buffer-substring save-pos (point)) extns)))
952 (setq mailcap-mime-extensions
954 (cons (if (= (string-to-char (car extns)) ?.)
956 (concat "." (car extns))) type)
957 mailcap-mime-extensions)
958 extns (cdr extns)))))))
960 (defun mailcap-extension-to-mime (extn)
961 "Return the MIME content type of the file extensions EXTN."
962 (mailcap-parse-mimetypes)
963 (if (and (stringp extn)
964 (not (eq (string-to-char extn) ?.)))
965 (setq extn (concat "." extn)))
966 (cdr (assoc (downcase extn) mailcap-mime-extensions)))
969 (defalias 'mailcap-command-p 'executable-find)
971 (defun mailcap-mime-types ()
972 "Return a list of MIME media types."
973 (mailcap-parse-mimetypes)
974 (mm-delete-duplicates
976 (mapcar 'cdr mailcap-mime-extensions)
984 (let ((type (cdr (assq 'type (cdr m)))))
985 (if (equal (cadr (split-string type "/"))
990 mailcap-mime-data)))))
992 (provide 'gnus-mailcap)
994 ;;; mailcap.el ends here