From 12ff697ab0c3c02b2ecd7e42ef9a534f9f0c2e10 Mon Sep 17 00:00:00 2001
From: arnd-s <34441397+arnd-s@users.noreply.github.com>
Date: Thu, 6 Jan 2022 06:59:37 +0100
Subject: [PATCH] [TwitterBridge] Continue using existing guesttoken from
 cache, when requesting a new one failed (#2396)

---
 bridges/TwitterBridge.php | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/bridges/TwitterBridge.php b/bridges/TwitterBridge.php
index e54a5d02..a14e5062 100644
--- a/bridges/TwitterBridge.php
+++ b/bridges/TwitterBridge.php
@@ -546,8 +546,16 @@ EOD;
 		if($guestTokenUses === null || !is_array($guestTokenUses) || count($guestTokenUses) != 2
 		|| $guestTokenUses[0] <= 0 || (time() - $refresh) > self::GUEST_TOKEN_EXPIRY) {
 			$guestToken = $this->getGuestToken();
-			$gt_cache->saveData(array(self::GUEST_TOKEN_USES, $guestToken));
-			$r_cache->saveData(time());
+			if ($guestToken === null) {
+				if($guestTokenUses === null) {
+					returnServerError('Could not parse guest token');
+				} else {
+					$guestToken = $guestTokenUses[1];
+				}
+			} else {
+				$gt_cache->saveData(array(self::GUEST_TOKEN_USES, $guestToken));
+				$r_cache->saveData(time());
+			}
 		} else {
 			$guestTokenUses[0] -= 1;
 			$gt_cache->saveData($guestTokenUses);
@@ -567,7 +575,7 @@ EOD;
 		preg_match_all($guestTokenRegex, $pageContent['header'], $guestTokenMatches, PREG_SET_ORDER, 0);
 		if (!$guestTokenMatches)
 				preg_match_all($guestTokenRegex, $pageContent['content'], $guestTokenMatches, PREG_SET_ORDER, 0);
-		if (!$guestTokenMatches) returnServerError('Could not parse guest token');
+		if (!$guestTokenMatches) return null;
 		$guestToken = $guestTokenMatches[0][1];
 		return $guestToken;
 	}