private async Task <OutputCacheModel> GenerateViewAsString(FilterContext context, ViewResult viewResult)
{
string viewName = viewResult.ViewName != null ? viewResult.ViewName : context.RouteData.Values["action"].ToString();
IViewEngine viewEngine = context.HttpContext.RequestServices.GetService(typeof(ICompositeViewEngine)) as ICompositeViewEngine;
ViewEngineResult viewEngineResult = viewEngine.FindView(context, viewName, true);
using (var writer = new StringWriter())
{
if (viewEngineResult.Success)
{
ViewContext viewContext = new ViewContext(context, viewEngineResult.View, viewResult.ViewData, viewResult.TempData, writer, new HtmlHelperOptions());
await viewEngineResult.View.RenderAsync(viewContext);
string content = writer.GetStringBuilder().ToString();
var outputCache = new OutputCacheModel()
{
Content = content,
ContentType = context.HttpContext.Response.ContentType,
StatusCode = context.HttpContext.Response.StatusCode
};
return(outputCache);
}
else
{
throw new FileNotFoundException($"A view with the name {viewName} could not be found");
}
}
}
public IActionResult Index()
{
OutputCacheModel OutputCache = new OutputCacheModel()
{
Content = "Test Content"
};
return(View(OutputCache));
}
public override async void OnResultExecuted(ResultExecutedContext context)
{
string cacheKey = $"{context.RouteData.Values["controller"].ToString()}-{context.RouteData.Values["action"].ToString()}";
Console.WriteLine("Duration is " + Duration);
if (cache.Get(cacheKey) == null)
{
Console.WriteLine("Cache null");
if (context.Result is ObjectResult objectResult)
{
string value = context.HttpContext.Response.ContentType.StartsWith("application/json") ? JsonConvert.SerializeObject(objectResult.Value, jsonSettings) : objectResult.Value.ToString();
var outputCache = new OutputCacheModel()
{
Content = value, ContentType = context.HttpContext.Response.ContentType, StatusCode = context.HttpContext.Response.StatusCode
};
cache.Set(cacheKey, outputCache, new MemoryCacheEntryOptions().SetAbsoluteExpiration(TimeSpan.FromSeconds(Duration)));
}
else if (context.Result is ViewResult viewResult)
{
Console.WriteLine($"\n\nActionResult is: {viewResult}\n\n");
string viewName = viewResult.ViewName != null ? viewResult.ViewName : context.RouteData.Values["action"].ToString();
using (var writer = new StringWriter())
{
IViewEngine viewEngine = context.HttpContext.RequestServices.GetService(typeof(ICompositeViewEngine)) as ICompositeViewEngine;
ViewEngineResult viewEngineResult = viewEngine.FindView(context, viewName, true);
if (viewEngineResult.Success)
{
ViewContext viewContext = new ViewContext(context, viewEngineResult.View, viewResult.ViewData, viewResult.TempData, writer, new HtmlHelperOptions());
await viewEngineResult.View.RenderAsync(viewContext);
string content = writer.GetStringBuilder().ToString();
var outputCache = new OutputCacheModel()
{
Content = content, ContentType = context.HttpContext.Response.ContentType, StatusCode = context.HttpContext.Response.StatusCode
};
cache.Set(cacheKey, outputCache, new MemoryCacheEntryOptions().SetAbsoluteExpiration(TimeSpan.FromSeconds(Duration)));
Console.WriteLine("Result is : ");
}
else
{
Console.WriteLine($"A view with the name {viewName} could not be found");
}
}
}
}
}
public async void OnResourceExecuted(ResourceExecutedContext context)
{
string cacheKey = $"{context.RouteData.Values["controller"].ToString()}-{context.RouteData.Values["action"].ToString()}";
if (cache.Get(cacheKey) == null)
{
OutputCacheModel outputCache = null;
if (context.Result is ObjectResult objectResult)
{
// Check if objectResult is JSON
string value = context.HttpContext.Response.ContentType.StartsWith("application/json")
? JsonConvert.SerializeObject(objectResult.Value, jsonSettings) : objectResult.Value.ToString();
outputCache = new OutputCacheModel()
{
Content = value,
ContentType = context.HttpContext.Response.ContentType,
StatusCode = context.HttpContext.Response.StatusCode
};
}
else if (context.Result is JsonResult jsonResult)
{
outputCache = new OutputCacheModel()
{
Content = JsonConvert.SerializeObject(jsonResult.Value, jsonSettings),
ContentType = context.HttpContext.Response.ContentType,
StatusCode = context.HttpContext.Response.StatusCode
};
}
else if (context.Result is ViewResult viewResult)
{
outputCache = await GenerateViewAsString(context, viewResult);
}
if (outputCache != null)
{
cache.Set(cacheKey, outputCache, new MemoryCacheEntryOptions().SetAbsoluteExpiration(TimeSpan.FromSeconds(Duration)));
}
}
}
