Customize: Trim whitespace for URLs supplied for `external_header_video` to prevent `esc_url_raw()` from making them invalid.

Props tyxla.
See #38172.
Fixes #39125.

Built from https://develop.svn.wordpress.org/trunk@39560


git-svn-id: http://core.svn.wordpress.org/trunk@39500 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-customize-manager.php

@@ -3896,7 +3896,7 @@ final class WP_Customize_Manager {
 		$this->add_setting( 'external_header_video', array(
 			'theme_supports'    => array( 'custom-header', 'video' ),
 			'transport'         => 'postMessage',
-			'sanitize_callback' => 'esc_url_raw',
+			'sanitize_callback' => array( $this, '_sanitize_external_header_video' ),
 			'validate_callback' => array( $this, '_validate_external_header_video' ),
 		) );
 
@@ -4318,6 +4318,18 @@ final class WP_Customize_Manager {
 		return $validity;
 	}
 
+	/**
+	 * Callback for sanitizing the external_header_video value.
+	 *
+	 * @since 4.7.1
+	 *
+	 * @param string $value URL.
+	 * @return string Sanitized URL.
+	 */
+	public function _sanitize_external_header_video( $value ) {
+		return esc_url_raw( trim( $value ) );
+	}
+
 	/**
 	 * Callback for rendering the custom logo, used in the custom_logo partial.
 	 *

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-39559';
+$wp_version = '4.8-alpha-39560';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.