protected override async Task <HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
HttpResponseMessage response = null;
var cacheRequest = request as CacheEnabledRequestMessage;
if (cacheRequest != null &&
cacheRequest.CacheOptions.UseFileCache)
{
var uri = request.RequestUri;
using (var uriLock = new UriLock(uri, cancellationToken))
{
cancellationToken.ThrowIfCancellationRequested();
// check cache
Stream stream = null;
if (_fileCache.TryGet(uri, out stream))
{
DataTraceSources.Verbose("[HttpClient] Cached Length: {0}", "" + stream.Length);
response = new CacheResponse(stream);
}
else
{
// get the item and add it to the cache
DataTraceSources.Verbose("[HttpClient] GET {0}", uri.AbsoluteUri);
response = await base.SendAsync(request, cancellationToken);
if (response.IsSuccessStatusCode)
{
DataTraceSources.Verbose("[HttpClient] Caching {0}");
_fileCache.Add(uri, cacheRequest.CacheOptions.MaxCacheLife, await response.Content.ReadAsStreamAsync());
}
}
}
}
if (response == null)
{
// skip cache
DataTraceSources.Verbose("[HttpClient] GET {0}", request.RequestUri.AbsoluteUri);
response = await base.SendAsync(request, cancellationToken);
}
return(response);
}
protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
HttpResponseMessage response = null;
var cacheRequest = request as CacheEnabledRequestMessage;
if (cacheRequest != null
&& cacheRequest.CacheOptions.UseFileCache)
{
var uri = request.RequestUri;
using (var uriLock = new UriLock(uri, cancellationToken))
{
cancellationToken.ThrowIfCancellationRequested();
// check cache
Stream stream = null;
if (_fileCache.TryGet(uri, out stream))
{
DataTraceSources.Verbose("[HttpClient] Cached Length: {0}", "" + stream.Length);
response = new CacheResponse(stream);
}
else
{
// get the item and add it to the cache
DataTraceSources.Verbose("[HttpClient] GET {0}", uri.AbsoluteUri);
response = await base.SendAsync(request, cancellationToken);
if (response.IsSuccessStatusCode)
{
DataTraceSources.Verbose("[HttpClient] Caching {0}");
_fileCache.Add(uri, cacheRequest.CacheOptions.MaxCacheLife, await response.Content.ReadAsStreamAsync());
}
}
}
}
if (response == null)
{
// skip cache
DataTraceSources.Verbose("[HttpClient] GET {0}", request.RequestUri.AbsoluteUri);
response = await base.SendAsync(request, cancellationToken);
}
return response;
}
