Example #1
0
        public async override Task OnActionExecutedAsync(HttpActionExecutedContext actionExecutedContext, CancellationToken cancellationToken)
        {
            //if current request is GET, there is no errors, and expiration date > now
            if (actionExecutedContext.Request.Method.Method.ToUpper() == "GET" &&
                actionExecutedContext.Response.IsSuccessStatusCode && _expirationDate > DateTime.Now)
            {
                var key = GenerateCacheKey(actionExecutedContext.ActionContext);

                var contentType = actionExecutedContext.Response.Content.Headers.ContentType;
                var value       = await(actionExecutedContext.Response.Content as ObjectContent).ReadAsByteArrayAsync().ConfigureAwait(false);
                //create cache holder and add it to memory list
                var cacheHolder = new CacheHolder(_expirationDate, value, key, contentType);
                GalileoMemoryStorage.Add(cacheHolder, key, _expirationDate);

                //set cache control header for clients to know that content is cached
                var secondsLeft = Math.Round((GalileoMemoryStorage.Get(key).ExpirationDate - DateTime.Now).TotalSeconds);
                actionExecutedContext.Response.Headers.Add("Cache-Control", string.Format("max-age={0}", secondsLeft));
                actionExecutedContext.Response.Headers.Add("ETag", string.Format("\"{0}\"", cacheHolder.ETag));
            }

            await base.OnActionExecutedAsync(actionExecutedContext, cancellationToken);
        }
Example #2
0
        public async override Task OnActionExecutingAsync(HttpActionContext actionContext, CancellationToken cancellationToken)
        {
            var key = GenerateCacheKey(actionContext);

            //if cache contains element which did not expire, inject it back to response
            if (GalileoMemoryStorage.Contains(key))
            {
                var memoryItem = GalileoMemoryStorage.Get(key);
                actionContext.Response         = actionContext.Request.CreateResponse(HttpStatusCode.OK);
                actionContext.Response.Content = new ByteArrayContent(memoryItem.Value);
                actionContext.Response.Content.Headers.ContentType = memoryItem.ContentType;

                //set cache control header for clients to know that content is cached
                var secondsLeft = Math.Round((memoryItem.ExpirationDate - DateTime.Now).TotalSeconds);
                actionContext.Response.Headers.Add("Cache-Control", string.Format("max-age={0}", secondsLeft));
                actionContext.Response.Headers.Add("ETag", string.Format("\"{0}\"", memoryItem.ETag));

                return;
            }

            await base.OnActionExecutingAsync(actionContext, cancellationToken);
        }