- Make mime type detection based on filename extension to be case-insensitive

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Make mime type detection based on filename extension to be case-insensitive
 - Fix failure on MySQL database upgrade from 0.7 - text column can't have default value (#1488300)
 - Added address book widget on compose screen
 - Use proper timezones from PHP's internal timezonedb (#1485592)

program/include/main.inc

@@ -1627,12 +1627,14 @@ function rcmail_filetype2classname($mimetype, $filename)
   list($primary, $secondary) = explode('/', $mimetype);
 
   $classes = array($primary ? $primary : 'unknown');
-  if ($secondary)
+  if ($secondary) {
     $classes[] = $secondary;
-  if (preg_match('/\.([a-z0-9]+)$/', $filename, $m))
+  }
+  if (preg_match('/\.([a-z0-9]+)$/i', $filename, $m)) {
     $classes[] = $m[1];
+  }
 
-  return join(" ", $classes);
+  return strtolower(join(" ", $classes));
 }
 
 /**

program/include/rcube_shared.inc

@@ -362,12 +362,14 @@ function rc_mime_content_type($path, $name, $failover = 'application/octet-strea
     $mime_type = null;
     $mime_magic = rcmail::get_instance()->config->get('mime_magic');
     $mime_ext = @include(RCMAIL_CONFIG_DIR . '/mimetypes.php');
-    $suffix = $name ? substr($name, strrpos($name, '.')+1) : '*';
 
     // use file name suffix with hard-coded mime-type map
-    if (is_array($mime_ext)) {
+    if (is_array($mime_ext) && $name) {
-        $mime_type = $mime_ext[$suffix];
+        if ($suffix = substr($name, strrpos($name, '.')+1)) {
+            $mime_type = $mime_ext[strtolower($suffix)];
+        }
     }
+
     // try fileinfo extension if available
     if (!$mime_type && function_exists('finfo_open')) {
         if ($finfo = finfo_open(FILEINFO_MIME, $mime_magic)) {
@@ -378,10 +380,12 @@ function rc_mime_content_type($path, $name, $failover = 'application/octet-strea
             finfo_close($finfo);
         }
     }
+
     // try PHP's mime_content_type
     if (!$mime_type && !$is_stream && function_exists('mime_content_type')) {
       $mime_type = @mime_content_type($path);
     }
+
     // fall back to user-submitted string
     if (!$mime_type) {
         $mime_type = $failover;