X-Git-Url: http://cgit.sxemacs.org/?a=blobdiff_plain;f=lisp%2Fmm-decode.el;h=29c41c69b23b62ab39de87fca8ab23836acb21bc;hb=4724093b5726d891e49e07191b52a14db1b93ecd;hp=977bb8ac853f49238c80fdaad2a3a4ab00978c6e;hpb=c6cae2afedb0085a5992c8fd540c655c45aca411;p=gnus

diff --git a/lisp/mm-decode.el b/lisp/mm-decode.el
index 977bb8ac8..29c41c69b 100644
--- a/lisp/mm-decode.el
+++ b/lisp/mm-decode.el
@@ -1,5 +1,6 @@
 ;;; mm-decode.el --- Functions for decoding MIME things
-;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004
+;;        Free Software Foundation, Inc.
 
 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
 ;;	MORIOKA Tomohiko <morioka@jaist.ac.jp>
@@ -31,7 +32,6 @@
 		   (require 'term))
 
 (eval-and-compile
-  (autoload 'executable-find "executable")
   (autoload 'mm-inline-partial "mm-partial")
   (autoload 'mm-inline-external-body "mm-extern")
   (autoload 'mm-insert-inline "mm-view"))
@@ -40,7 +40,7 @@
 
 (defgroup mime-display ()
   "Display of MIME in mail and news articles."
-  :link '(custom-manual "(emacs-mime)Customization")
+  :link '(custom-manual "(emacs-mime)Display Customization")
   :version "21.1"
   :group 'mail
   :group 'news
@@ -48,7 +48,7 @@
 
 (defgroup mime-security ()
   "MIME security in mail and news articles."
-  :link '(custom-manual "(emacs-mime)Customization")
+  :link '(custom-manual "(emacs-mime)Display Customization")
   :group 'mail
   :group 'news
   :group 'multimedia)
@@ -98,21 +98,25 @@
 
 (defcustom mm-text-html-renderer
   (cond ((locate-library "w3") 'w3)
-	((locate-library "w3m") 'w3m)
+	((executable-find "w3m") (if (locate-library "w3m")
+				     'w3m
+				   'w3m-standalone))
 	((executable-find "links") 'links)
 	((executable-find "lynx") 'lynx)
 	(t 'html2text))
   "Render of HTML contents.
 It is one of defined renderer types, or a rendering function.
 The defined renderer types are:
-`w3'   : using Emacs/W3;
-`w3m'  : using emacs-w3m;
-`links': using links;
-`lynx' : using lynx;
-`html2text' : using html2text;
-`nil'  : using external viewer."
+`w3'   : use Emacs/W3;
+`w3m'  : use emacs-w3m;
+`w3m-standalone': use w3m;
+`links': use links;
+`lynx' : use lynx;
+`html2text' : use html2text;
+nil    : use external viewer."
   :type '(choice (const w3)
 		 (const w3m)
+		 (const w3m-standalone)
 		 (const links)
 		 (const lynx)
 		 (const html2text)
@@ -126,20 +130,24 @@ The defined renderer types are:
 It is suggested to customize `mm-text-html-renderer' instead.")
 
 (defcustom mm-inline-text-html-with-images nil
-  "If non-nil, Gnus will allow retrieving images in the HTML contents
-with <img> tags.  It has no effect on Emacs/w3.  See also
-the documentation for the option `mm-w3m-safe-url-regexp'."
+  "If non-nil, Gnus will allow retrieving images in HTML contents with
+the <img> tags.  It has no effect on Emacs/w3.  See also the
+documentation for the `mm-w3m-safe-url-regexp' variable."
   :type 'boolean
   :group 'mime-display)
 
 (defcustom mm-w3m-safe-url-regexp "\\`cid:"
-  "Regexp that matches safe url names.  Some HTML mails might have a
-trick of spammers using <img> tags.  It is likely to be intended to
-verify whether you have read the mail.  You can prevent your personal
-informations from leaking by setting this to the regexp which matches
-the safe url names.  The value of the variable `w3m-safe-url-regexp'
-will be bound with this value.  You may set this value to nil if you
-consider all the urls to be safe."
+  "Regexp matching URLs which are considered to be safe.
+Some HTML mails might contain a nasty trick used by spammers, using
+the <img> tag which is far more evil than the [Click Here!] button.
+It is most likely intended to check whether the ominous spam mail has
+reached your eyes or not, in which case the spammer knows for sure
+that your email address is valid.  It is done by embedding an
+identifier string into a URL that you might automatically retrieve
+when displaying the image.  The default value is \"\\\\`cid:\" which only
+matches parts embedded to the Multipart/Related type MIME contents and
+Gnus will never connect to the spammer's site arbitrarily.  You may
+set this variable to nil if you consider all urls to be safe."
   :type '(choice (regexp :tag "Regexp")
 		 (const :tag "All URLs are safe" nil))
   :group 'mime-display)
@@ -149,8 +157,20 @@ consider all the urls to be safe."
   :type 'boolean
   :group 'mime-display)
 
+(defcustom mm-enable-external t
+  "Indicate whether external MIME handlers should be used.
+
+If t, all defined external MIME handlers are used.  If nil, files are saved by
+`mailcap-save-binary-file'.  If it is the symbol `ask', you are prompted
+before the external MIME handler is invoked."
+  :version "21.4"
+  :type '(choice (const :tag "Always" t)
+		 (const :tag "Never" nil)
+		 (const :tag "Ask" ask))
+  :group 'mime-display)
+
 (defcustom mm-inline-media-tests
-  '(("image/jpeg"
+  '(("image/p?jpeg"
      mm-inline-image
      (lambda (handle)
        (mm-valid-and-fit-image-p 'jpeg handle)))
@@ -236,7 +256,7 @@ consider all the urls to be safe."
     ;; Default to displaying as text
     (".*" mm-inline-text mm-readable-p))
   "Alist of media types/tests saying whether types can be displayed inline."
-  :type '(repeat (list (string :tag "MIME type")
+  :type '(repeat (list (regexp :tag "MIME type")
 		       (function :tag "Display function")
 		       (function :tag "Display test")))
   :group 'mime-display)
@@ -307,9 +327,11 @@ to:
   :group 'mime-display)
 
 (defcustom mm-tmp-directory
-  (cond ((fboundp 'temp-directory) (temp-directory))
-	((boundp 'temporary-file-directory) temporary-file-directory)
-	("/tmp/"))
+  (if (fboundp 'temp-directory)
+      (temp-directory)
+    (if (boundp 'temporary-file-directory)
+	temporary-file-directory
+      "/tmp/"))
   "Where mm will store its temporary files."
   :type 'directory
   :group 'mime-display)
@@ -319,11 +341,14 @@ to:
   :type 'boolean
   :group 'mime-display)
 
-(defvar mm-file-name-rewrite-functions nil
+(defvar mm-file-name-rewrite-functions
+  '(mm-file-name-delete-control mm-file-name-delete-gotchas)
   "*List of functions used for rewriting file names of MIME parts.
 Each function takes a file name as input and returns a file name.
 
 Ready-made functions include
+`mm-file-name-delete-control'
+`mm-file-name-delete-gotchas'
 `mm-file-name-delete-whitespace',
 `mm-file-name-trim-whitespace',
 `mm-file-name-collapse-whitespace',
@@ -332,10 +357,10 @@ Ready-made functions include
 `upcase-initials'.")
 
 (defvar mm-path-name-rewrite-functions nil
-  "*List of functions used for rewriting path names of MIME parts.
-This is used when viewing parts externally , and is meant for
-transforming the path name so that non-compliant programs can
-find the file where it's saved.
+  "*List of functions for rewriting the full file names of MIME parts.
+This is used when viewing parts externally, and is meant for
+transforming the absolute name so that non-compliant programs can find
+the file where it's saved.
 
 Each function takes a file name as input and returns a file name.")
 
@@ -348,6 +373,11 @@ If not set, `default-directory' will be used."
   :type '(choice directory (const :tag "Default" nil))
   :group 'mime-display)
 
+(defcustom mm-attachment-file-modes 384
+  "Set the mode bits of saved attachments to this integer."
+  :type 'integer
+  :group 'mime-display)
+
 (defcustom mm-external-terminal-program "xterm"
   "The program to start an external terminal."
   :type 'string
@@ -355,7 +385,6 @@ If not set, `default-directory' will be used."
 
 ;;; Internal variables.
 
-(defvar mm-dissection-list nil)
 (defvar mm-last-shell-command "")
 (defvar mm-content-id-alist nil)
 (defvar mm-postponed-undisplay-list nil)
@@ -382,7 +411,7 @@ If not set, `default-directory' will be used."
 (defcustom mm-verify-option 'never
   "Option of verifying signed parts.
 `never', not verify; `always', always verify;
-`known', only verify known protocols. Otherwise, ask user."
+`known', only verify known protocols.  Otherwise, ask user."
   :type '(choice (item always)
 		 (item never)
 		 (item :tag "only known protocols" known)
@@ -400,7 +429,7 @@ If not set, `default-directory' will be used."
 (defcustom mm-decrypt-option nil
   "Option of decrypting encrypted parts.
 `never', not decrypt; `always', always decrypt;
-`known', only decrypt known protocols. Otherwise, ask user."
+`known', only decrypt known protocols.  Otherwise, ask user."
   :type '(choice (item always)
 		 (item never)
 		 (item :tag "only known protocols" known)
@@ -456,8 +485,9 @@ The original alist is not modified.  See also `destructive-alist-to-plist'."
 	  (throw 'found t))))))
 
 (defun mm-handle-set-external-undisplayer (handle function)
-  "Set the undisplayer for this handle; postpone undisplaying of viewers
-for types in mm-keep-viewer-alive-types."
+  "Set the undisplayer for HANDLE to FUNCTION.
+Postpone undisplaying of viewers for types in
+`mm-keep-viewer-alive-types'."
   (if (mm-keep-viewer-alive-p handle)
       (let ((new-handle (copy-sequence handle)))
 	(mm-handle-set-undisplayer new-handle function)
@@ -513,7 +543,8 @@ for types in mm-keep-viewer-alive-types."
 	  ((equal type "multipart")
 	   (let ((mm-dissect-default-type (if (equal subtype "digest")
 					      "message/rfc822"
-					    "text/plain")))
+					    "text/plain"))
+		 (start (cdr (assq 'start (cdr ctl)))))
 	     (add-text-properties 0 (length (car ctl))
 				  (mm-alist-to-plist (cdr ctl)) (car ctl))
 
@@ -523,10 +554,9 @@ for types in mm-keep-viewer-alive-types."
 	     ;; the mm-handle API so we simply store the multipart buffert
 	     ;; name as a text property of the "multipart/whatever" string.
 	     (add-text-properties 0 (length (car ctl))
-				  (list 'buffer (mm-copy-to-buffer))
-				  (car ctl))
-	     (add-text-properties 0 (length (car ctl))
-				  (list 'from from)
+				  (list 'buffer (mm-copy-to-buffer)
+					'from from
+					'start start)
 				  (car ctl))
 	     (cons (car ctl) (mm-dissect-multipart ctl))))
 	  (t
@@ -552,16 +582,8 @@ for types in mm-keep-viewer-alive-types."
 	    (if (equal "text/plain" (car ctl))
 		(assoc 'format ctl)
 	      t))
-    (let ((res (mm-make-handle
-		(mm-copy-to-buffer) ctl cte nil cdl description nil id)))
-      (push (car res) mm-dissection-list)
-      res)))
-
-(defun mm-remove-all-parts ()
-  "Remove all MIME handles."
-  (interactive)
-  (mapcar 'mm-remove-part mm-dissection-list)
-  (setq mm-dissection-list nil))
+    (mm-make-handle
+     (mm-copy-to-buffer) ctl cte nil cdl description nil id)))
 
 (defun mm-dissect-multipart (ctl)
   (goto-char (point-min))
@@ -623,7 +645,13 @@ external if displayed external."
     (if (mm-handle-displayed-p handle)
 	(mm-remove-part handle)
       (let* ((type (mm-handle-media-type handle))
-	     (method (mailcap-mime-info type)))
+	     (method (mailcap-mime-info type))
+	     (filename (or (mail-content-type-get
+			    (mm-handle-disposition handle) 'filename)
+			   (mail-content-type-get
+			    (mm-handle-type handle) 'name)
+			   "<file>"))
+	     (external mm-enable-external))
 	(if (and (mm-inlinable-p handle)
 		 (mm-inlined-p handle))
 	    (progn
@@ -638,8 +666,27 @@ external if displayed external."
 		  (forward-line 1)
 		  (mm-insert-inline handle (mm-get-part handle))
 		  'inline)
-	      (mm-display-external
-	       handle (or method 'mailcap-save-binary-file)))))))))
+	      (if (and method ;; If nil, we always use "save".
+		       (stringp method) ;; 'mailcap-save-binary-file
+		       (or (eq mm-enable-external t)
+			   (and (eq mm-enable-external 'ask)
+				(y-or-n-p
+				 (concat
+				  "Display part (" type
+				  ") using external program"
+				  ;; Can non-string method ever happen?
+				  (if (stringp method)
+				      (concat
+				       " \"" (format method filename) "\"")
+				    "")
+				  "? ")))))
+		  (setq external t)
+		(setq external nil))
+	      (if external
+		  (mm-display-external
+		   handle (or method 'mailcap-save-binary-file))
+		(mm-display-external
+		 handle 'mailcap-save-binary-file)))))))))
 
 (defun mm-display-external (handle method)
   "Display HANDLE using METHOD."
@@ -660,7 +707,8 @@ external if displayed external."
 	    (mm-set-buffer-file-coding-system mm-binary-coding-system)
 	    (insert-buffer-substring cur)
 	    (goto-char (point-min))
-	    (message "Viewing with %s" method)
+	    (when method
+	      (message "Viewing with %s" method))
 	    (let ((mm (current-buffer))
 		  (non-viewer (assq 'non-viewer
 				    (mailcap-mime-info
@@ -785,16 +833,16 @@ external if displayed external."
 	    (string= total "'%s'")
 	    (string= total "\"%s\""))
 	(setq uses-stdin nil)
-	(push (mm-quote-arg
+	(push (shell-quote-argument
 	       (gnus-map-function mm-path-name-rewrite-functions file)) out))
        ((string= total "%t")
-	(push (mm-quote-arg (car type-list)) out))
+	(push (shell-quote-argument (car type-list)) out))
        (t
-	(push (mm-quote-arg (or (cdr (assq (intern sub) ctl)) "")) out))))
+	(push (shell-quote-argument (or (cdr (assq (intern sub) ctl)) "")) out))))
     (push (substring method beg (length method)) out)
     (when uses-stdin
       (push "<" out)
-      (push (mm-quote-arg
+      (push (shell-quote-argument
 	     (gnus-map-function mm-path-name-rewrite-functions file))
 	    out))
     (mapconcat 'identity (nreverse out) "")))
@@ -848,9 +896,18 @@ external if displayed external."
 	  (funcall object))
 	 ;; Externally displayed part.
 	 ((consp object)
+	  (condition-case ()
+	      (while (get-buffer-process (cdr object))
+		(interrupt-process (get-buffer-process (cdr object)))
+		(message "Waiting for external displayer to die...")
+		(sit-for 1))
+	    (quit)
+	    (error))
+	  (ignore-errors (and (cdr object) (kill-buffer (cdr object))))
+	  (message "Waiting for external displayer to die...done")
 	  (ignore-errors (delete-file (car object)))
-	  (ignore-errors (delete-directory (file-name-directory (car object))))
-	  (ignore-errors (and (cdr object) (kill-buffer (cdr object)))))
+	  (ignore-errors (delete-directory (file-name-directory
+					    (car object)))))
 	 ((bufferp object)
 	  (when (buffer-live-p object)
 	    (kill-buffer object)))))
@@ -1007,13 +1064,22 @@ external if displayed external."
 
 (defun mm-file-name-replace-whitespace (file-name)
   "Replace whitespace characters in FILE-NAME with underscores.
-Set `mm-file-name-replace-whitespace' to any other string if you do not
-like underscores."
+Set the option `mm-file-name-replace-whitespace' to any other
+string if you do not like underscores."
   (let ((s (or mm-file-name-replace-whitespace "_")))
     (while (string-match "\\s-" file-name)
       (setq file-name (replace-match s t t file-name))))
   file-name)
 
+(defun mm-file-name-delete-control (filename)
+  "Delete control characters from FILENAME."
+  (gnus-replace-in-string filename "[\x00-\x1f\x7f]" ""))
+
+(defun mm-file-name-delete-gotchas (filename)
+  "Delete shell gotchas from FILENAME."
+  (setq filename (gnus-replace-in-string filename "[<>|]" ""))
+  (gnus-replace-in-string filename "^[.-]+" ""))
+
 (defun mm-save-part (handle)
   "Write HANDLE to a file."
   (let* ((name (mail-content-type-get (mm-handle-type handle) 'name))
@@ -1024,9 +1090,10 @@ like underscores."
       (setq filename (gnus-map-function mm-file-name-rewrite-functions
 					(file-name-nondirectory filename))))
     (setq file
-	  (read-file-name "Save MIME part to: "
-			  (or mm-default-directory default-directory)
-			  nil nil (or filename name "")))
+	  (mm-with-multibyte
+	    (read-file-name "Save MIME part to: "
+			    (or mm-default-directory default-directory)
+			    nil nil (or filename name ""))))
     (setq mm-default-directory (file-name-directory file))
     (and (or (not (file-exists-p file))
 	     (yes-or-no-p (format "File %s already exists; overwrite? "
@@ -1039,13 +1106,17 @@ like underscores."
   (mm-with-unibyte-buffer
     (mm-insert-part handle)
     (let ((coding-system-for-write 'binary)
+	  (current-file-modes (default-file-modes))
 	  ;; Don't re-compress .gz & al.  Arguably we should make
 	  ;; `file-name-handler-alist' nil, but that would chop
 	  ;; ange-ftp, which is reasonable to use here.
 	  (inhibit-file-name-operation 'write-region)
 	  (inhibit-file-name-handlers
 	   (cons 'jka-compr-handler inhibit-file-name-handlers)))
-      (write-region (point-min) (point-max) file))))
+      (set-default-file-modes mm-attachment-file-modes)
+      (unwind-protect
+	  (write-region (point-min) (point-max) file)
+	(set-default-file-modes current-file-modes)))))
 
 (defun mm-pipe-part (handle)
   "Pipe HANDLE to a process."
@@ -1270,7 +1341,7 @@ If RECURSIVE, search recursively."
 		    (if notp
 			(not (equal (car ctl) type))
 		      (equal (car ctl) type)))
-	      (setq result (buffer-substring (point-min) (point-max)))))))
+	      (setq result (buffer-string))))))
       (forward-line 1)
       (setq start (point)))
     (when (and (not result) start)
@@ -1283,16 +1354,16 @@ If RECURSIVE, search recursively."
 		  (if notp
 		      (not (equal (car ctl) type))
 		    (equal (car ctl) type)))
-	    (setq result (buffer-substring (point-min) (point-max)))))))
+	    (setq result (buffer-string))))))
     result))
 
 (defvar mm-security-handle nil)
 
 (defsubst mm-set-handle-multipart-parameter (handle parameter value)
   ;; HANDLE could be a CTL.
-  (if handle
-      (put-text-property 0 (length (car handle)) parameter value
-			 (car handle))))
+  (when handle
+    (put-text-property 0 (length (car handle)) parameter value
+		       (car handle))))
 
 (defun mm-possibly-verify-or-decrypt (parts ctl)
   (let ((type (car ctl))
@@ -1325,25 +1396,26 @@ If RECURSIVE, search recursively."
 		      protocols nil)
 	      (setq protocols (cdr protocols))))))
       (setq func (nth 1 (assoc protocol mm-verify-function-alist)))
-      (if (cond
-	   ((eq mm-verify-option 'never) nil)
-	   ((eq mm-verify-option 'always) t)
-	   ((eq mm-verify-option 'known)
-	    (and func
-		 (or (not (setq functest
-				(nth 3 (assoc protocol
-					      mm-verify-function-alist))))
-		     (funcall functest parts ctl))))
-	   (t (y-or-n-p
+      (when (cond
+	     ((eq mm-verify-option 'never) nil)
+	     ((eq mm-verify-option 'always) t)
+	     ((eq mm-verify-option 'known)
+	      (and func
+		   (or (not (setq functest
+				  (nth 3 (assoc protocol
+						mm-verify-function-alist))))
+		       (funcall functest parts ctl))))
+	     (t
+	      (y-or-n-p
 	       (format "Verify signed (%s) part? "
 		       (or (nth 2 (assoc protocol mm-verify-function-alist))
 			   (format "protocol=%s" protocol))))))
-	  (save-excursion
-	    (if func
-		(funcall func parts ctl)
-	      (mm-set-handle-multipart-parameter
-	       mm-security-handle 'gnus-details
-	       (format "Unknown sign protocol (%s)" protocol))))))
+	(save-excursion
+	  (if func
+	      (funcall func parts ctl)
+	    (mm-set-handle-multipart-parameter
+	     mm-security-handle 'gnus-details
+	     (format "Unknown sign protocol (%s)" protocol))))))
      ((equal subtype "encrypted")
       (unless (setq protocol
 		    (mm-handle-multipart-ctl-parameter ctl 'protocol))
@@ -1356,29 +1428,36 @@ If RECURSIVE, search recursively."
 		      parts nil)
 	      (setq parts (cdr parts))))))
       (setq func (nth 1 (assoc protocol mm-decrypt-function-alist)))
-      (if (cond
-	   ((eq mm-decrypt-option 'never) nil)
-	   ((eq mm-decrypt-option 'always) t)
-	   ((eq mm-decrypt-option 'known)
-	    (and func
-		 (or (not (setq functest
-				(nth 3 (assoc protocol
-					      mm-decrypt-function-alist))))
-		     (funcall functest parts ctl))))
-	   (t (y-or-n-p
+      (when (cond
+	     ((eq mm-decrypt-option 'never) nil)
+	     ((eq mm-decrypt-option 'always) t)
+	     ((eq mm-decrypt-option 'known)
+	      (and func
+		   (or (not (setq functest
+				  (nth 3 (assoc protocol
+						mm-decrypt-function-alist))))
+		       (funcall functest parts ctl))))
+	     (t
+	      (y-or-n-p
 	       (format "Decrypt (%s) part? "
 		       (or (nth 2 (assoc protocol mm-decrypt-function-alist))
 			   (format "protocol=%s" protocol))))))
-	  (save-excursion
-	    (if func
-		(setq parts (funcall func parts ctl))
-	      (mm-set-handle-multipart-parameter
-	       mm-security-handle 'gnus-details
-	       (format "Unknown encrypt protocol (%s)" protocol))))))
+	(save-excursion
+	  (if func
+	      (setq parts (funcall func parts ctl))
+	    (mm-set-handle-multipart-parameter
+	     mm-security-handle 'gnus-details
+	     (format "Unknown encrypt protocol (%s)" protocol))))))
      (t nil))
     parts))
 
 (defun mm-multiple-handles (handles)
+  (and (listp handles)
+       (> (length handles) 1)
+       (or (listp (car handles))
+	   (stringp (car handles)))))
+
+(defun mm-complicated-handles (handles)
   (and (listp (car handles))
        (> (length handles) 1)))
 
@@ -1402,4 +1481,5 @@ If RECURSIVE, search recursively."
 
 (provide 'mm-decode)
 
+;;; arch-tag: 4f35d360-56b8-4030-9388-3ed82d359b9b
 ;;; mm-decode.el ends here