We will no longer replace previously valid oEmbed responses with an `{{unknown}}` cache value. When this happens due to reaching a rate limit or a service going down, it is data loss, and is not acceptable. This means that oEmbed caches for a post are no longer deleted indiscriminately every time that post is saved.
oEmbed continues to be cached in post meta, with the addition of a separate meta key containing the timestamp of the last retrieval, which is used to avoid re-requesting a recently cached oEmbed response. By default, we consider a valued cached in the past day to be fresh. This can greatly reduce the number of outbound requests, especially in cases where a post containing multiple embeds is saved frequently.
The TTL used to determine whether or not to request a response can be filtered using `oembed_ttl`, thus allowing for the possibility of respecting the optional oEmbed response parameter `cache_age` or altering the period of time a cached value is considered to be fresh.
Now that oEmbeds are previewed in the visual editor as well as the media modal, oEmbed caches are often populated before a post is saved or published. By pre-populating and avoiding having to re-request that response, we also greatly reduce the chances of a stampede happening when a published post is visible before oEmbed caching is complete.
As it previously stood, a stampede was extremely likely to happen, as the AJAX caching was only triggered when `$_GET['message']` was 1. The published message is 6. We now trigger the caching every time `$_GET['message']` is present on the edit screen, as we are able to avoid triggering so many HTTP requests overall.
props markjaquith. fixes#14759. see #17210.
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* In `wp_ajax_add_tag()`, `$post_type` is set and never used.
* In `wp_ajax_hidden_columns()`, `$hidden` is set twice, but only checks for the existence of `$_POST['hidden']` the first time. The two lines can be combined and work together.
* In `wp_ajax_inline_save()`, `$mode` is set and never used.
* In `wp_ajax_find_posts()`, `$searchand = $search = '';` is leftover cruft, neither variable is used. `$wpdb` does not need to be imported, it is never used.
* In `wp_ajax_wp_fullscreen_save_post()`, `$post_type` is set and never used.
* In `wp_ajax_save_attachment_order()`, `$post` is set and never used.
* In `wp_ajax_send_attachment_to_editor()`, `$title` is set and never used.
See #27882.
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- Removes wp-tinymce-schema.js and mark-loaded.js, no longer needed.
- Removes the inlinepopups and most of the wpdialogs plugins; wpdialog.js is moved to wp-includes/js.
- Adds charmap, compat3x, image, link and textcolor plugins, previously contained in /themes/advanced.
- Updates the wordpress, wpeditimage, wpfullscreen, wpgallery and wplink plugins.
- Updates DFW, wp-admin/js/wp-fullscreen.js.
See #24067.
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* Update about page, there's now 8.
* Display them four wide, not three, and ensure adequate spacing.
* Use a dedicated nonce.
* Push Light to the front in addition to Default.
* Use user-profile.js on about.php. A few extra things are initialized but they are harmless.
see #26468, #26387.
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* Use wp_add_dashboard_widget() rather than add_meta_box().
* Use original functions like wp_dashboard_primary(), wp_dashboard_right_now(), wp_dashboard_quick_press() (where possible).
* Only include plugins section of the news widget when appropriate, which necessitates the set_current_screen() via the ajax action.
* Remove some debug cruft that was preventing caching and invalidation.
* Simplify lots of things where possible.
see #25824.
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Color scheme selection on your own profile page gives you a preview and autosaves the selection.
Also introduces the usage of a preprocessor for core files, namely Sass. For 3.8, we will not expand its implementation past the color schemes. This does require Ruby as well as Sass 3.3.0+ due to the usage of the sourcemap option.
Note that only the default color scheme is available when running out of src. Use build to test the rest as well as the color picker.
props ryelle, melchoyce, tillkruess, drw158, littlethingsstudio, helen. see #25858, #22862.
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* `wp_ajax_get_comments()` relies on the `$post_id` global - even though `$_POST['p']` is passed to every action in the test methods. If `$post_id` is still lingering in between tests and doesn't match `p` in the request, the cap check might pass while the queries for comments will blow up. I added `unset( $GLOBALS['post_id'] )` to `Tests_Ajax_GetComments::setUp()`.
* If the global `$post_id` is empty, but `$_REQUEST['p']` is not, `$post_id` is now set to `absint( $_REQUEST['p'] )` and sanity-checked in `wp_ajax_get_comments()`.
* `map_meta_cap()` always assumes that `get_comment()` succeeds when checking for the `edit_comment` cap. It doesn't. I added sanity checks in a few places where it will break early if `get_post()` or `get_comment()` are empty.
* `wp_update_comment()` always assumes `get_comment()` succeeds. It doesn't. I added a check for empty.
All AJAX unit tests run and pass in debug mode. All general unit tests pass against these changes.
Fixes#25282.
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* There are several places where a `$_POST` index was unchecked before setting a variable
* In `wp_notify_postauthor()`, `$comment` was being returned null, but its properties were being accessed.
* In `check_ajax_referer()`, 3 different values can be checked for nonce on `$_REQUEST`, but only 1 had an `isset()`
See #25282.
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