update cached item definition

Author: lanlanlee2008

src/OutputCacheModuleAsync/InMemoryOutputCacheProvider.cs

@@ -3,10 +3,9 @@
     using System.Runtime.Caching;
     using System.Threading.Tasks;
     using System.Web.Caching;
-    using Resource;
 
     class InMemoryOutputCacheProvider : OutputCacheProviderAsync {
-        private readonly MemoryCache _cache = new MemoryCache(SR.Microsoft_AspNet_OutputCache_Default_InMemory_Provider);
+        private readonly MemoryCache _cache = new MemoryCache("Microsoft.AspNet.OutputCache Default In - Memory Provider");
 
         public override Task<object> GetAsync(string key) {
             return Task.FromResult(Get(key)); 

src/OutputCacheModuleAsync/OutputCacheModuleAsync.cs

@@ -59,18 +59,24 @@ private async Task OnEnterAsync(object source, EventArgs eventArgs) {
             // 'item' may be one of the following:
             //  - a CachedVary object (if the object varies by something)
             //  - a CachedRawResponse object (i.e. it doesn't vary on anything)
-            //  First assume it's a CacheVary
-            object cachedItem = null;
+            //  First assume it's a CacheVary and try to get the cachedItem with it
+            CachedRawResponse cachedRawResponse;
             var cachedVary = item as CachedVary;
             if (cachedVary != null) {
-                cachedItem = await helper.GetAsCacheVaryAsync(cachedVary);
+                var cachedItem = await helper.GetAsCacheVaryAsync(cachedVary);
+                if (cachedItem == null) {
+                    return;
+                }
+                 cachedRawResponse = (CachedRawResponse)cachedItem;
             }
-            if (cachedItem == null) {
+            else {
+                cachedRawResponse = item as CachedRawResponse;
+            }
+            if (cachedRawResponse == null) {
                 return;
             }
 
             // From this point on, we have an Raw Response entry to work with.
-            var cachedRawResponse = (CachedRawResponse)cachedItem;
             HttpCachePolicySettings settings = cachedRawResponse.CachePolicy;
             if (helper.CheckCachedVary(cachedVary, settings)) {
                 return;

src/OutputCacheModuleAsync/Resource/SR.Designer.cs

@@ -123,9 +123,6 @@
   <data name="Cannot_use_snapshot_after_headers_sent" xml:space="preserve">
     <value>Cannot use snapshot after headers sent.</value>
   </data>
-  <data name="Microsoft_AspNet_OutputCache_Default_InMemory_Provider" xml:space="preserve">
-    <value>Microsoft.AspNet.OutputCache Default In-Memory Provider</value>
-  </data>
   <data name="Provider_does_not_support_policy_for_responses" xml:space="preserve">
     <value>Provider does not support policy for responses.</value>
   </data>