Index: includes/file.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/file.inc,v
retrieving revision 1.237
diff -u -p -r1.237 file.inc
--- includes/file.inc	15 Oct 2010 03:36:21 -0000	1.237
+++ includes/file.inc	15 Oct 2010 15:32:53 -0000
@@ -122,11 +122,11 @@ function file_get_stream_wrappers($filte
         else {
           $wrappers[$scheme]['override'] = FALSE;
         }
-        if (($info['type'] & STREAM_WRAPPERS_REMOTE) == STREAM_WRAPPERS_REMOTE) {
-          stream_wrapper_register($scheme, $info['class'], STREAM_IS_URL);
+        if (($info['type'] & STREAM_WRAPPERS_LOCAL) == STREAM_WRAPPERS_LOCAL) {
+          stream_wrapper_register($scheme, $info['class']);
         }
         else {
-          stream_wrapper_register($scheme, $info['class']);
+          stream_wrapper_register($scheme, $info['class'], STREAM_IS_URL);
         }
       }
       // Pre-populate the static cache with the filters most typically used.
Index: includes/stream_wrappers.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/stream_wrappers.inc,v
retrieving revision 1.20
diff -u -p -r1.20 stream_wrappers.inc
--- includes/stream_wrappers.inc	17 Aug 2010 22:05:22 -0000	1.20
+++ includes/stream_wrappers.inc	15 Oct 2010 15:32:53 -0000
@@ -65,6 +65,11 @@ define('STREAM_WRAPPERS_VISIBLE', 0x0010
 define('STREAM_WRAPPERS_HIDDEN', STREAM_WRAPPERS_READ | STREAM_WRAPPERS_WRITE);
 
 /**
+ * Stream wrapper type flag -- hidden, readable and writeable using local files.
+ */
+define('STREAM_WRAPPERS_LOCAL_HIDDEN', STREAM_WRAPPERS_LOCAL | STREAM_WRAPPERS_HIDDEN);
+
+/**
  * Stream wrapper type flag -- visible, readable and writeable.
  */
 define('STREAM_WRAPPERS_WRITE_VISIBLE', STREAM_WRAPPERS_READ | STREAM_WRAPPERS_WRITE | STREAM_WRAPPERS_VISIBLE);
@@ -75,9 +80,14 @@ define('STREAM_WRAPPERS_WRITE_VISIBLE', 
 define('STREAM_WRAPPERS_READ_VISIBLE', STREAM_WRAPPERS_READ | STREAM_WRAPPERS_VISIBLE);
 
 /**
+ * Stream wrapper type flag -- visible, readable and writeable using remote files.
+ */
+define('STREAM_WRAPPERS_NORMAL', STREAM_WRAPPERS_REMOTE | STREAM_WRAPPERS_WRITE_VISIBLE);
+
+/**
  * Stream wrapper type flag -- visible, readable and writeable using local files.
  */
-define('STREAM_WRAPPERS_NORMAL', STREAM_WRAPPERS_LOCAL | STREAM_WRAPPERS_WRITE_VISIBLE);
+define('STREAM_WRAPPERS_LOCAL_NORMAL', STREAM_WRAPPERS_LOCAL | STREAM_WRAPPERS_WRITE_VISIBLE);
 
 /**
  * Generic PHP stream wrapper interface.
Index: modules/system/system.api.php
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.api.php,v
retrieving revision 1.199
diff -u -p -r1.199 system.api.php
--- modules/system/system.api.php	15 Oct 2010 03:36:21 -0000	1.199
+++ modules/system/system.api.php	15 Oct 2010 15:33:00 -0000
@@ -2296,9 +2296,14 @@ function hook_modules_uninstalled($modul
  *   - 'class' A string specifying the PHP class that implements the
  *     DrupalStreamWrapperInterface interface.
  *   - 'description' A string with a short description of what the wrapper does.
- *   - 'type' A bitmask of flags indicating what type of streams this wrapper
- *     will access - local or remote, readable and/or writeable, etc. Many
- *     shortcut constants are defined in stream_wrappers.inc.
+ *   - 'type' (Optional) A bitmask of flags indicating what type of streams this
+ *     wrapper will access - local or remote, readable and/or writeable, etc.
+ *     Many shortcut constants are defined in stream_wrappers.inc. Defaults to
+ *     STREAM_WRAPPERS_NORMAL which includes all of these bit flags:
+ *     - STREAM_WRAPPERS_REMOTE
+ *     - STREAM_WRAPPERS_READ
+ *     - STREAM_WRAPPERS_WRITE
+ *     - STREAM_WRAPPERS_VISIBLE
  *
  * @see file_get_stream_wrappers()
  * @see hook_stream_wrappers_alter()
@@ -2310,18 +2315,35 @@ function hook_stream_wrappers() {
       'name' => t('Public files'),
       'class' => 'DrupalPublicStreamWrapper',
       'description' => t('Public local files served by the webserver.'),
+      'type' => STREAM_WRAPPERS_LOCAL_NORMAL,
     ),
     'private' => array(
       'name' => t('Private files'),
       'class' => 'DrupalPrivateStreamWrapper',
       'description' => t('Private local files served by Drupal.'),
+      'type' => STREAM_WRAPPERS_LOCAL_NORMAL,
     ),
     'temp' => array(
       'name' => t('Temporary files'),
       'class' => 'DrupalTempStreamWrapper',
       'description' => t('Temporary local files for upload and previews.'),
-      'type' => STREAM_WRAPPERS_HIDDEN,
-    )
+      'type' => STREAM_WRAPPERS_LOCAL_HIDDEN,
+    ),
+    'cdn' => array(
+      'name' => t('Content delivery network files'),
+      'class' => 'MyModuleCDNStreamWrapper',
+      'description' => t('Files served by a content delivery network.'),
+      // 'type' can be omitted to use the default of STREAM_WRAPPERS_NORMAL
+    ),
+    'youtube' => array(
+      'name' => t('YouTube video'),
+      'class' => 'MyModuleYouTubeStreamWrapper',
+      'description' => t('Video streamed from YouTube.'),
+      // A module implementing YouTube integration may decide to support using
+      // the YouTube API for uploading video, but here, we assume that this
+      // particular module only supports playing YouTube video.
+      'type' => STREAM_WRAPPERS_READ_VISIBLE,
+    ),
   );
 }
 
Index: modules/system/system.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.module,v
retrieving revision 1.981
diff -u -p -r1.981 system.module
--- modules/system/system.module	15 Oct 2010 04:40:41 -0000	1.981
+++ modules/system/system.module	15 Oct 2010 15:33:00 -0000
@@ -1541,12 +1541,13 @@ function system_stream_wrappers() {
       'name' => t('Public files'),
       'class' => 'DrupalPublicStreamWrapper',
       'description' => t('Public local files served by the webserver.'),
+      'type' => STREAM_WRAPPERS_LOCAL_NORMAL,
     ),
     'temporary' => array(
       'name' => t('Temporary files'),
       'class' => 'DrupalTemporaryStreamWrapper',
       'description' => t('Temporary local files for upload and previews.'),
-      'type' => STREAM_WRAPPERS_HIDDEN,
+      'type' => STREAM_WRAPPERS_LOCAL_HIDDEN,
     ),
   );
 
@@ -1556,6 +1557,7 @@ function system_stream_wrappers() {
       'name' => t('Private files'),
       'class' => 'DrupalPrivateStreamWrapper',
       'description' => t('Private local files served by Drupal.'),
+      'type' => STREAM_WRAPPERS_LOCAL_NORMAL,
     );
   }