From ea33553ba7e5ae25286836c62d1d5634d8d2c0b0 Mon Sep 17 00:00:00 2001
From: Gilles Dubuc <gilles@wikimedia.org>
Date: Wed, 20 Feb 2019 09:49:28 +0100
Subject: [PATCH] Chrome Origin Trial support

Bug: T216595
Change-Id: I74b8824a87e6f52a84d2f8a9708501fc05f73266
---
 includes/DefaultSettings.php |  8 ++++++++
 includes/OutputPage.php      | 17 +++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/includes/DefaultSettings.php b/includes/DefaultSettings.php
index 537f411cb4..1761b00778 100644
--- a/includes/DefaultSettings.php
+++ b/includes/DefaultSettings.php
@@ -9019,6 +9019,14 @@ $wgEnableRollbackConfirmationPrompt = true;
  */
 $wgEnableBlockNoticeStats = false;
 
+/**
+ * Origin Trials tokens.
+ *
+ * @since 1.34
+ * @var array
+ */
+$wgOriginTrials = [];
+
 /**
  * For really cool vim folding this needs to be at the end:
  * vim: foldmarker=@{,@} foldmethod=marker
diff --git a/includes/OutputPage.php b/includes/OutputPage.php
index 9b766bb2d4..461df946e7 100644
--- a/includes/OutputPage.php
+++ b/includes/OutputPage.php
@@ -2522,6 +2522,18 @@ class OutputPage extends ContextSource {
 		return false;
 	}
 
+	/**
+	 * Get the Origin-Trial header values. This is used to enable Chrome Origin
+	 * Trials: https://github.com/GoogleChrome/OriginTrials
+	 *
+	 * @return array
+	 */
+	private function getOriginTrials() {
+		$config = $this->getConfig();
+
+		return $config->get( 'OriginTrials' );
+	}
+
 	/**
 	 * Send cache control HTTP headers
 	 */
@@ -2688,6 +2700,11 @@ class OutputPage extends ContextSource {
 			$response->header( "X-Frame-Options: $frameOptions" );
 		}
 
+		$originTrials = $this->getOriginTrials();
+		foreach ( $originTrials as $originTrial ) {
+			$response->header( "Origin-Trial: $originTrial", false );
+		}
+
 		ContentSecurityPolicy::sendHeaders( $this );
 
 		if ( $this->mArticleBodyOnly ) {
-- 
2.20.1