Possibility to override eTag-creation for custom caching rules. See: meerikss@2811ff0

Author: Thorium

src/WebAPI.OutputCache/CacheOutputAttribute.cs

@@ -180,7 +180,7 @@ public override void OnActionExecuted(HttpActionExecutedContext actionExecutedCo
                 {
                     var response = actionExecutedContext.Response;
                     var actionContext = actionExecutedContext.ActionContext;
-                    SetEtag(response, Guid.NewGuid().ToString());
+                    SetEtag(response, CreateEtag(actionExecutedContext, cachekey, cacheTime));
 
 
                     if (response.Content != null)
@@ -207,6 +207,11 @@ public override void OnActionExecuted(HttpActionExecutedContext actionExecutedCo
             ApplyCacheHeaders(actionExecutedContext.ActionContext.Response, cacheTime);
         }
 
+        protected virtual string CreateEtag(HttpActionExecutedContext actionExecutedContext, string cachekey, CacheTime cacheTime)
+        {
+            return Guid.NewGuid().ToString();
+        }
+
         private void ApplyCacheHeaders(HttpResponseMessage response, CacheTime cacheTime)
         {
             if (cacheTime.ClientTimeSpan > TimeSpan.Zero || MustRevalidate || Private)

src/WebApi.OutputCache.V2/CacheOutputAttribute.cs

@@ -191,7 +191,7 @@ private async Task OnActionExecuted(HttpActionExecutedContext actionExecutedCont
 
                 if (!string.IsNullOrWhiteSpace(cachekey) && !(_webApiCache.Contains(cachekey)))
                 {
-                    SetEtag(actionExecutedContext.Response, Guid.NewGuid().ToString());
+                    SetEtag(actionExecutedContext.Response, CreateEtag(actionExecutedContext, cachekey, cacheTime));
 
                     var responseContent = actionExecutedContext.Response.Content;
 
@@ -244,6 +244,11 @@ protected virtual void ApplyCacheHeaders(HttpResponseMessage response, CacheTime
             }
         }
 
+        protected virtual string CreateEtag(HttpActionExecutedContext actionExecutedContext, string cachekey, CacheTime cacheTime)
+        {
+            return Guid.NewGuid().ToString();
+        }
+
         private static void SetEtag(HttpResponseMessage message, string etag)
         {
             if (etag != null)