public bool TryGetValue(HttpContext context, out OutputCacheResponse response)
{
response = null;
return
(_cache.TryGetValue(_cacheKeysProvider.GetCacheProfileCacheKey(context.Request), out OutputCacheProfile profile) &&
_cache.TryGetValue(_cacheKeysProvider.GetRequestCacheKey(context, profile), out response));
}
public void Set(HttpContext context, OutputCacheResponse response)
{
if (context.IsOutputCachingEnabled(out OutputCacheProfile profile))
{
AddProfileToCache(context, profile);
AddResponseToCache(context, profile, response);
}
}
public void Set(HttpContext context, OutputCacheResponse response, JObject jObject)
{
if (!context.IsOutputCachingEnabled(out OutputCacheProfile profile))
{
return;
}
AddProfileToCache(context, profile);
AddResponseToCache(context, profile, response, jObject);
}
private static async Task ServeFromCacheAsync(HttpContext context, OutputCacheResponse value)
{
// Copy over the HTTP headers
foreach (string name in value.Headers.Keys.Where(name => !context.Response.Headers.ContainsKey(name)))
{
context.Response.Headers[name] = value.Headers[name];
}
// Serve a conditional GET request when if-none-match header exist
if (context.Request.Headers.TryGetValue(HeaderNames.IfNoneMatch, out StringValues etag) &&
context.Response.Headers[HeaderNames.ETag] == etag)
{
context.Response.ContentLength = 0;
context.Response.StatusCode = StatusCodes.Status304NotModified;
}
else
{
await context.Response.Body.WriteAsync(value.Body, 0, value.Body.Length);
}
}
internal bool IsCached(HttpContext context, out OutputCacheResponse response)
{
string key = GetCacheKey(context);
return(_responses.TryGetValue(key, out response));
}
internal void AddResponse(HttpContext context, OutputCacheResponse response)
{
string key = GetCacheKey(context);
_responses[key] = response;
}
private void AddResponseToCache(HttpContext context, OutputCacheProfile profile, OutputCacheResponse response)
{
var hostingEnvironment = context.RequestServices.GetRequiredService <IHostingEnvironment>();
var options = profile.BuildMemoryCacheEntryOptions(hostingEnvironment);
_cache.Set(_cacheKeysProvider.GetRequestCacheKey(context, profile), response, options);
}
