/// <inheritdoc />
protected override async Task <HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
var retrieveBody = _retrieveBody;
if (retrieveBody == null && NetCache.RequestCache != null)
{
retrieveBody = NetCache.RequestCache.Fetch;
}
if (retrieveBody == null)
{
throw new Exception("Configure NetCache.RequestCache before calling this!");
}
var body = await retrieveBody(request, RateLimitedHttpMessageHandler.UniqueKeyForRequest(request), cancellationToken).ConfigureAwait(false);
if (body == null)
{
return(new HttpResponseMessage(HttpStatusCode.ServiceUnavailable));
}
var byteContent = new ByteArrayContent(body);
return(new HttpResponseMessage(HttpStatusCode.OK)
{
Content = byteContent
});
}
static NetCache()
{
var innerHandler = Locator.Current.GetService <HttpMessageHandler>() ?? new HttpClientHandler();
// NB: In vNext this value will be adjusted based on the user's
// network connection, but that requires us to go fully platformy
// like Splat.
speculative = new RateLimitedHttpMessageHandler(innerHandler, Priority.Speculative, 0, 1048576 * 5);
userInitiated = new RateLimitedHttpMessageHandler(innerHandler, Priority.UserInitiated, 0);
background = new RateLimitedHttpMessageHandler(innerHandler, Priority.Background, 0);
offline = new OfflineHttpMessageHandler(null);
}