public static bool HasValidCache(this IRequest req, CacheInfo cacheInfo)
{
if (cacheInfo == null)
{
return(false);
}
var cache = cacheInfo.LocalCache ? HostContext.LocalCache : HostContext.Cache;
var doHttpCaching = cacheInfo.MaxAge != null || cacheInfo.CacheControl != CacheControl.None;
if (doHttpCaching)
{
var lastModified = cache.Get <DateTime?>(cacheInfo.LastModifiedKey());
if (req.HasValidCache(lastModified))
{
req.Response.EndNotModified();
return(true);
}
}
var encoding = req.GetCompressionType();
var responseBytes = encoding != null
? cache.Get <byte[]>(cacheInfo.CacheKey + "." + encoding)
: cache.Get <byte[]>(cacheInfo.CacheKey);
if (responseBytes != null)
{
if (encoding != null)
{
req.Response.AddHeader(HttpHeaders.ContentEncoding, encoding);
}
req.Response.WriteBytesToResponse(responseBytes, req.ResponseContentType);
return(true);
}
return(false);
}
public static async Task<bool> HandleValidCache(this IRequest req, CacheInfo cacheInfo, CancellationToken token=default)
{
if (cacheInfo == null)
return false;
ICacheClient cache;
ICacheClientAsync cacheAsync = null; // only non-null if native ICacheClientAsync exists
if (cacheInfo.LocalCache)
cache = HostContext.AppHost.GetMemoryCacheClient(req);
else
HostContext.AppHost.TryGetNativeCacheClient(req, out cache, out cacheAsync);
var cacheControl = HostContext.GetPlugin<HttpCacheFeature>().BuildCacheControlHeader(cacheInfo);
var res = req.Response;
DateTime? lastModified = null;
var doHttpCaching = cacheInfo.MaxAge != null || cacheInfo.CacheControl != CacheControl.None;
if (doHttpCaching)
{
lastModified = cacheAsync != null
? await cacheAsync.GetAsync<DateTime?>(cacheInfo.LastModifiedKey(), token).ConfigAwait()
: cache.Get<DateTime?>(cacheInfo.LastModifiedKey());
if (req.HasValidCache(lastModified))
{
if (cacheControl != null)
res.AddHeader(HttpHeaders.CacheControl, cacheControl);
res.EndNotModified();
return true;
}
}
var encoding = !cacheInfo.NoCompression
? req.GetCompressionType()
: null;
var useCacheKey = encoding != null
? cacheInfo.CacheKey + "." + encoding
: cacheInfo.CacheKey;
var responseBytes = cacheAsync != null
? await cacheAsync.GetAsync<byte[]>(useCacheKey, token).ConfigAwait()
: cache.Get<byte[]>(useCacheKey);
if (responseBytes != null)
{
if (encoding != null)
res.AddHeader(HttpHeaders.ContentEncoding, encoding);
if (cacheInfo.VaryByUser)
res.AddHeader(HttpHeaders.Vary, "Cookie");
if (cacheControl != null)
res.AddHeader(HttpHeaders.CacheControl, cacheControl);
if (!doHttpCaching)
{
lastModified = cacheAsync != null ?
await cacheAsync.GetAsync<DateTime?>(cacheInfo.LastModifiedKey(), token).ConfigAwait() :
cache.Get<DateTime?>(cacheInfo.LastModifiedKey());
}
if (lastModified != null)
res.AddHeader(HttpHeaders.LastModified, lastModified.Value.ToUniversalTime().ToString("r"));
await res.WriteBytesToResponse(responseBytes, req.ResponseContentType, token).ConfigAwait();
return true;
}
return false;
}
public static bool HandleValidCache(this IRequest req, CacheInfo cacheInfo)
{
if (cacheInfo == null)
return false;
var res = req.Response;
var cache = cacheInfo.LocalCache ? HostContext.LocalCache : HostContext.Cache;
DateTime? lastModified = null;
var doHttpCaching = cacheInfo.MaxAge != null || cacheInfo.CacheControl != CacheControl.None;
if (doHttpCaching)
{
lastModified = cache.Get<DateTime?>(cacheInfo.LastModifiedKey());
if (req.HasValidCache(lastModified))
{
res.EndNotModified();
return true;
}
}
var encoding = !cacheInfo.NoCompression
? req.GetCompressionType()
: null;
var responseBytes = encoding != null
? cache.Get<byte[]>(cacheInfo.CacheKey + "." + encoding)
: cache.Get<byte[]>(cacheInfo.CacheKey);
if (responseBytes != null)
{
if (encoding != null)
res.AddHeader(HttpHeaders.ContentEncoding, encoding);
if (cacheInfo.VaryByUser)
res.AddHeader(HttpHeaders.Vary, "Cookie");
var cacheControl = HostContext.GetPlugin<HttpCacheFeature>().BuildCacheControlHeader(cacheInfo);
if (cacheControl != null)
res.AddHeader(HttpHeaders.CacheControl, cacheControl);
if (!doHttpCaching)
lastModified = cache.Get<DateTime?>(cacheInfo.LastModifiedKey());
if (lastModified != null)
res.AddHeader(HttpHeaders.LastModified, lastModified.Value.ToUniversalTime().ToString("r"));
res.WriteBytesToResponse(responseBytes, req.ResponseContentType);
return true;
}
return false;
}
public static bool HandleValidCache(this IRequest req, CacheInfo cacheInfo)
{
if (cacheInfo == null)
{
return(false);
}
var res = req.Response;
var cache = cacheInfo.LocalCache ? HostContext.LocalCache : HostContext.Cache;
DateTime?lastModified = null;
var doHttpCaching = cacheInfo.MaxAge != null || cacheInfo.CacheControl != CacheControl.None;
if (doHttpCaching)
{
lastModified = cache.Get <DateTime?>(cacheInfo.LastModifiedKey());
if (req.HasValidCache(lastModified))
{
res.EndNotModified();
return(true);
}
}
var encoding = req.GetCompressionType();
var responseBytes = encoding != null
? cache.Get <byte[]>(cacheInfo.CacheKey + "." + encoding)
: cache.Get <byte[]>(cacheInfo.CacheKey);
if (responseBytes != null)
{
if (encoding != null)
{
res.AddHeader(HttpHeaders.ContentEncoding, encoding);
}
if (cacheInfo.VaryByUser)
{
res.AddHeader(HttpHeaders.Vary, "Cookie");
}
var cacheControl = HostContext.GetPlugin <HttpCacheFeature>().BuildCacheControlHeader(cacheInfo);
if (cacheControl != null)
{
res.AddHeader(HttpHeaders.CacheControl, cacheControl);
}
if (!doHttpCaching)
{
lastModified = cache.Get <DateTime?>(cacheInfo.LastModifiedKey());
}
if (lastModified != null)
{
res.AddHeader(HttpHeaders.LastModified, lastModified.Value.ToUniversalTime().ToString("r"));
}
res.WriteBytesToResponse(responseBytes, req.ResponseContentType);
return(true);
}
return(false);
}
