From dc9e0906fd8903f9768c1324609849b0bbf011cb Mon Sep 17 00:00:00 2001
From: Lukasz Raczylo <lukasz@raczylo.com>
Date: Mon, 19 Aug 2024 11:27:06 +0100
Subject: [PATCH] Resolve issue when proxy could panic.

Issue occured when cache was disabled via environment variables but
graphql queries contained the cache directive.
---
 cache/cache.go | 8 ++++++++
 main.go        | 1 +
 2 files changed, 9 insertions(+)

diff --git a/cache/cache.go b/cache/cache.go
index 6b1eb59..48274b1 100644
--- a/cache/cache.go
+++ b/cache/cache.go
@@ -76,6 +76,10 @@ func EnableCache(cfg *CacheConfig) {
 }
 
 func CacheLookup(hash string) []byte {
+	if !IsCacheInitialized() {
+		return nil
+	}
+
 	obj, found := config.Client.Get(hash)
 	if found {
 		atomic.AddInt64(&cacheStats.CacheHits, 1)
@@ -157,3 +161,7 @@ func GetCacheStats() *CacheStats {
 func ShouldUseRedisCache(cfg *CacheConfig) bool {
 	return cfg.Redis.Enable
 }
+
+func IsCacheInitialized() bool {
+	return config != nil && config.Client != nil
+}
diff --git a/main.go b/main.go
index 41455a6..5cd6958 100644
--- a/main.go
+++ b/main.go
@@ -105,6 +105,7 @@ func parseConfig() {
 		}
 		libpack_cache.EnableCache(cacheConfig)
 	}
+
 	loadRatelimitConfig()
 	once.Do(func() {
 		go enableApi()