/// <summary>
/// Sends an HTTP request and gets the result serialized by JSON.
/// </summary>
/// <param name="request">The HTTP request message.</param>
/// <param name="callback">An optional callback raised on data received.</param>
/// <param name="cancellationToken">The optional cancellation token.</param>
/// <returns>A result serialized.</returns>
/// <exception cref="ArgumentNullException">The request was null.</exception>
/// <exception cref="FailedHttpException">HTTP response contains failure status code.</exception>
/// <exception cref="HttpRequestException">The request failed due to an underlying issue such as network connectivity, DNS failure, server certificate validation or timeout.</exception>
/// <exception cref="InvalidOperationException">The task is cancelled.</exception>
/// <exception cref="ObjectDisposedException">The inner HTTP web client instance has been disposed.</exception>
public async Task <T> SendAsync(HttpRequestMessage request, Action <ReceivedEventArgs <T> > callback, CancellationToken cancellationToken = default)
{
if (request == null)
{
throw new ArgumentNullException(nameof(request), "request should not be null.");
}
if (Client == null && !IsNewHttpClientByDefault)
{
Client = new HttpClient();
}
var client = Client ?? new HttpClient();
var timeout = Timeout;
if (timeout.HasValue)
{
try
{
client.Timeout = timeout.Value;
}
catch (ArgumentException)
{
}
}
var maxBufferSize = MaxResponseContentBufferSize;
if (maxBufferSize.HasValue)
{
try
{
client.MaxResponseContentBufferSize = maxBufferSize.Value;
}
catch (ArgumentException)
{
}
}
Sending?.Invoke(this, new SendingEventArgs(request));
cancellationToken.ThrowIfCancellationRequested();
OnSend(request);
HttpResponseMessage resp = null;
T valueResult;
try
{
var result = await Tasks.RetryExtensions.ProcessAsync(RetryPolicy, async (CancellationToken cancellation) =>
{
resp = await client.SendAsync(request, cancellationToken);
if (!SerializeEvenIfFailed && !resp.IsSuccessStatusCode)
{
throw FailedHttpException.Create(resp, "Failed to send JSON HTTP web request because of unsuccess status code.");
}
var obj = Deserializer != null
#if NET5_0_OR_GREATER
? await HttpClientExtensions.DeserializeAsync(resp.Content, Deserializer, cancellationToken)
#else
? await HttpClientExtensions.DeserializeAsync(resp.Content, Deserializer)
#endif
: await HttpClientExtensions.DeserializeJsonAsync <T>(resp.Content, cancellationToken);
return(obj);
}, GetExceptionInternal, cancellationToken);
valueResult = result.Result;
}
catch (HttpRequestException)
{
OnReceive(default, resp);
