ReviewViewer: Hash combined cache key to optimize storage, lookup performance, and avoid exceeding maximum key length limits

Author: darklinkpower

source/Common/PluginsCommon/Extensions/StringExtensions.cs

@@ -41,6 +41,16 @@ internal static byte[] MD5Bytes(this string s)
             }
         }
 
+        public static string ToHashedKey(this string input)
+        {
+            using (var sha = Security.Cryptography.SHA256.Create())
+            {
+                var inputBytes = Encoding.UTF8.GetBytes(input);
+                var hashBytes = sha.ComputeHash(inputBytes);
+                return Convert.ToBase64String(hashBytes);
+            }
+        }
+
         internal static string GetSHA256Hash(this string input)
         {
             using (var sha = Security.Cryptography.SHA256.Create())
@@ -50,6 +60,14 @@ internal static string GetSHA256Hash(this string input)
             }
         }
 
+        public static byte[] GetSHA256HashByte(this string input)
+        {
+            using (var sha = System.Security.Cryptography.SHA256.Create())
+            {
+                return sha.ComputeHash(Encoding.UTF8.GetBytes(input));
+            }
+        }
+
         internal static string UrlEncode(this string str)
         {
             if (string.IsNullOrEmpty(str))

source/Generic/ReviewViewer/Application/SteamReviewsCoordinator.cs

@@ -37,7 +37,8 @@ public async Task<ReviewsResponseDto> GetReviewsAsync(
             string cursor = "*")
         {
             var cacheKey = $"{appId}_{Serialization.ToJson(options)}_{cursor}";
-            var existingCache = _repository.Find(x => x.CacheKey == cacheKey).FirstOrDefault();
+            var hashedCacheKey = cacheKey.ToHashedKey();
+            var existingCache = _repository.Find(x => x.CacheKey == hashedCacheKey).FirstOrDefault();
             if (!forceRefresh && existingCache != null && (DateTime.UtcNow - existingCache.CreatedAt) < _cacheDuration)
             {
                 return existingCache.Response;
@@ -53,7 +54,7 @@ public async Task<ReviewsResponseDto> GetReviewsAsync(
 
                 var newRecord = new ReviewsResponseRecord
                 {
-                    CacheKey = cacheKey,
+                    CacheKey = hashedCacheKey,
                     Response = freshData
                 };