TinyMCE, inline link:

- Remove proxying through WordPress to test if an URL exists.
- Fix and enhance the regex that tests if the URL is well formed.

Fixes #36638.

git-svn-id: https://develop.svn.wordpress.org/trunk@38159 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/ajax-actions.php

@@ -3886,46 +3886,3 @@ function wp_ajax_search_install_plugins() {
 
 	wp_send_json_success( $status );
 }
-
-/**
- * Ajax handler for testing if a URL exists.
- *
- * Used in the editor.
- *
- * @since 4.6.0
- */
-function wp_ajax_test_url() {
-	if ( ! current_user_can( 'edit_posts' ) || ! wp_verify_nonce( $_POST['nonce'], 'wp-test-url' ) ) {
-		wp_send_json_error();
-	}
-
-	$href = esc_url_raw( $_POST['href'] );
-
-	// Relative URL
-	if ( strpos( $href, '//' ) !== 0 && in_array( $href[0], array( '/', '#', '?' ), true ) ) {
-		$href = get_bloginfo( 'url' ) . $href;
-	}
-
-	// No redirects
-	$response = wp_safe_remote_get( $href, array(
-		'timeout' => 15,
-		// Use an explicit user-agent
-		'user-agent' => 'WordPress URL Test',
-	) );
-
-	$error = false;
-
-	if ( is_wp_error( $response ) ) {
-		if ( strpos( $response->get_error_message(), 'resolve host' ) !== false ) {
-			$error = true;
-		}
-	} elseif ( wp_remote_retrieve_response_code( $response ) === 404 ) {
-		$error = true;
-	}
-
-	if ( $error ) {
-		wp_send_json_error( array( 'httpError' => true ) );
-	}
-
-	wp_send_json_success();
-}