core: Add torznab cache option for individual indexers (#12235)

README.md

@@ -738,6 +738,9 @@ configuration or even disable the cache. Keep in mind that you can be banned by
 * **Cache TTL (seconds)**: (default 2100 / 35 minutes) It indicates how long the results can remain in the cache.
 * **Cache max results per indexer**: (default 1000) How many results are kept in cache for each indexer. This limit is used to limit the use of RAM. If you make many requests and you have enough memory, increase this number.
 
+## Torznab cache
+If you have enabled the Jackett internal cache, but have an indexer for which you would prefer to fetch fresh results (thus ignoring the internal cache) then add the **&cache=false** parameter to your torznab query.
+
 ## Configuring FlareSolverr
 Some indexers are protected by CloudFlare or similar services and Jackett is not able to solve the challenges.
 For these cases, [FlareSolverr](https://github.com/FlareSolverr/FlareSolverr) has been integrated into Jackett. This service is in charge of solving the challenges and configuring Jackett with the necessary cookies.

src/Jackett.Common/Indexers/BaseIndexer.cs

@@ -390,9 +390,12 @@ namespace Jackett.Common.Indexers
             if (!CanHandleQuery(query) || !CanHandleCategories(query, isMetaIndexer))
                 return new IndexerResult(this, new ReleaseInfo[0], false);
 
-            var cachedReleases = cacheService.Search(this, query);
-            if (cachedReleases != null)
-                return new IndexerResult(this, cachedReleases, true);
+            if (query.Cache)
+            {
+                var cachedReleases = cacheService.Search(this, query);
+                if (cachedReleases != null)
+                    return new IndexerResult(this, cachedReleases, true);
+            }
 
             try
             {

src/Jackett.Common/Models/DTO/TorznabRequest.cs

@@ -26,6 +26,7 @@ namespace Jackett.Common.Models.DTO
         public string author { get; set; }
         public string title { get; set; }
         public string configured { get; set; }
+        public string cache { get; set; }
 
         public static TorznabQuery ToTorznabQuery(TorznabRequest request)
         {
@@ -45,6 +46,12 @@ namespace Jackett.Common.Models.DTO
             if (!string.IsNullOrWhiteSpace(request.offset))
                 query.Offset = ParseUtil.CoerceInt(request.offset);
 
+            bool _cache;
+            if (bool.TryParse(request.cache, out _cache))
+            {
+                query.Cache = _cache;
+            }
+
             if (request.cat != null)
             {
                 query.Categories = request.cat.Split(',').Where(s => !string.IsNullOrWhiteSpace(s)).Select(s => int.Parse(s)).ToArray();

src/Jackett.Common/Models/TorznabQuery.cs

@@ -19,6 +19,7 @@ namespace Jackett.Common.Models
         public int? TvdbID { get; set; }
         public string ImdbID { get; set; }
         public int? TmdbID { get; set; }
+        public bool Cache { get; set; } = true;
 
         public int Season { get; set; }
         public string Episode { get; set; }
@@ -137,7 +138,8 @@ namespace Jackett.Common.Models
                 RageID = RageID,
                 TvdbID = TvdbID,
                 ImdbID = ImdbID,
-                TmdbID = TmdbID
+                TmdbID = TmdbID,
+                Cache = Cache
             };
             if (Categories?.Length > 0)
             {

src/Jackett.Common/Services/CacheService.cs

@@ -252,6 +252,9 @@ namespace Jackett.Common.Services
             // Both request must return the same results, if not we are breaking Jackett search
             json = json.Replace("\"SearchTerm\":null", "\"SearchTerm\":\"\"");
 
+            // The Cache parameter's value should not affect caching itself
+            json = json.Replace("\"Cache\":false", "\"Cache\":true");
+
             return json;
         }