mm-decode.el (mm-dissect-buffer): Guess content-type if the first token is missing...

[gnus] / lisp / mm-decode.el

diff --git a/lisp/mm-decode.el b/lisp/mm-decode.el
index 941849d..4a9007a 100644 (file)
--- a/lisp/mm-decode.el
+++ b/lisp/mm-decode.el
@@ -672,12 +672,39 @@ MIME-Version header before proceeding."
                                 description)))))
       (if (or (not ctl)
              (not (string-match "/" (car ctl))))
                                 description)))))
       (if (or (not ctl)
              (not (string-match "/" (car ctl))))

-         (mm-dissect-singlepart
-          (list mm-dissect-default-type)
-          (and cte (intern (downcase (mail-header-strip cte))))
-          no-strict-mime
-          (and cd (mail-header-parse-content-disposition cd))
-          description)
+         (let ((cdl (and cd (mail-header-parse-content-disposition cd))))
+           (mm-dissect-singlepart
+            ;; Guess Content-Type from the file name extention.
+            ;; Some mailer sends a part without type like this:
+            ;;  Content-Type: ; name="IMG_3156.JPG"
+            ;;  Content-Disposition: attachment; filename="IMG_3156.JPG"
+            (list (or
+                   (let ((tem
+                          (or (mail-content-type-get cdl 'filename)
+                              (and ct
+                                   (with-temp-buffer
+                                     (insert ct)
+                                     (goto-char (point-min))
+                                     (and (re-search-forward "\
+;[\t\n ]*name=\\([\"']\\|\\([^\t\n\r ]+\\)\\)" nil t)
+                                          (or (match-string 2)
+                                              (progn
+                                                (goto-char (match-beginning 1))
+                                                (condition-case nil
+                                                    (progn
+                                                      (forward-sexp 1)
+                                                      (buffer-substring
+                                                       (1+ (match-beginning 1))
+                                                       (1- (point))))
+                                                  (error nil))))))))))
+                     (and tem
+                          (setq tem (file-name-extension tem))
+                          (require 'mailcap)
+                          (cdr (assoc (concat "." (downcase tem))
+                                      mailcap-mime-extensions))))
+                   mm-dissect-default-type))
+            (and cte (intern (downcase (mail-header-strip cte))))
+            no-strict-mime cdl description))

        (setq type (split-string (car ctl) "/"))
        (setq subtype (cadr type)
              type (car type))
        (setq type (split-string (car ctl) "/"))
        (setq subtype (cadr type)
              type (car type))