wp_ajax_parse_embed()

3783function wp_ajax_parse_embed() {3784	global $post, $wp_embed, $content_width;3785 3786	if ( empty( $_POST['shortcode'] ) ) {3787		wp_send_json_error();3788	}3789 3790	$post_id = isset( $_POST['post_ID'] ) ? (int) $_POST['post_ID'] : 0;3791 3792	if ( $post_id > 0 ) {3793		$post = get_post( $post_id );3794 3795		if ( ! $post || ! current_user_can( 'edit_post', $post->ID ) ) {3796			wp_send_json_error();3797		}3798		setup_postdata( $post );3799	} elseif ( ! current_user_can( 'edit_posts' ) ) { // See WP_oEmbed_Controller::get_proxy_item_permissions_check().3800		wp_send_json_error();3801	}3802 3803	$shortcode = wp_unslash( $_POST['shortcode'] );3804 3805	preg_match( '/' . get_shortcode_regex() . '/s', $shortcode, $matches );3806	$atts = shortcode_parse_atts( $matches[3] );3807 3808	if ( ! empty( $matches[5] ) ) {3809		$url = $matches[5];3810	} elseif ( ! empty( $atts['src'] ) ) {3811		$url = $atts['src'];3812	} else {3813		$url = '';3814	}3815 3816	$parsed                         = false;3817	$wp_embed->return_false_on_fail = true;3818 3819	if ( 0 === $post_id ) {3820		/*3821		 * Refresh oEmbeds cached outside of posts that are past their TTL.3822		 * Posts are excluded because they have separate logic for refreshing3823		 * their post meta caches. See WP_Embed::cache_oembed().3824		 */3825		$wp_embed->usecache = false;3826	}3827 3828	if ( is_ssl() && str_starts_with( $url, 'http://' ) ) {3829		/*3830		 * Admin is ssl and the user pasted non-ssl URL.3831		 * Check if the provider supports ssl embeds and use that for the preview.3832		 */3833		$ssl_shortcode = preg_replace( '%^(\\[embed[^\\]]*\\])http://%i', '$1https://', $shortcode );3834		$parsed        = $wp_embed->run_shortcode( $ssl_shortcode );3835 3836		if ( ! $parsed ) {3837			$no_ssl_support = true;3838		}3839	}3840 3841	// Set $content_width so any embeds fit in the destination iframe.3842	if ( isset( $_POST['maxwidth'] ) && is_numeric( $_POST['maxwidth'] ) && $_POST['maxwidth'] > 0 ) {3843		if ( ! isset( $content_width ) ) {3844			$content_width = (int) $_POST['maxwidth'];3845		} else {3846			$content_width = min( $content_width, (int) $_POST['maxwidth'] );3847		}3848	}3849 3850	if ( $url && ! $parsed ) {3851		$parsed = $wp_embed->run_shortcode( $shortcode );3852	}3853 3854	if ( ! $parsed ) {3855		wp_send_json_error(3856			array(3857				'type'    => 'not-embeddable',3858				/* translators: %s: URL that could not be embedded. */3859				'message' => sprintf( __( '%s failed to embed.' ), '<code>' . esc_html( $url ) . '</code>' ),3860			)3861		);3862	}