public WaitForTask WaitFor(WaitForTask.Condition condition)
{
var task = new WaitForTask(condition);
AddTask(task);
return(task);
}
/// <summary>
/// Begins the read response string.
/// </summary>
/// <param name="callback">The callback.</param>
/// <param name="state">The state.</param>
/// <returns></returns>
public Task <string> ReadResponseStringAsync()
{
return(WaitForTask.ContinueWith(_ => webRequest
.GetResponseAsync()
.ContinueWith(t => ReadStringInternal(() => t.Result))
.ContinueWith(task => RetryIfNeedTo(task, ReadResponseStringAsync))
.Unwrap())
.Unwrap());
}
public Task <byte[]> ReadResponseBytesAsync()
{
return(WaitForTask.ContinueWith(_ => webRequest
.GetResponseAsync()
.ContinueWith(t => ReadResponse(() => t.Result, ConvertStreamToBytes))
.ContinueWith(task => RetryIfNeedTo(task, ReadResponseBytesAsync))
.Unwrap())
.Unwrap());
}
public Task <byte[]> ReadResponseBytesAsync()
{
return(WaitForTask.ContinueWith(_ => httpClient.SendAsync(new HttpRequestMessage(method, url))
.ConvertSecurityExceptionToServerNotFound()
.AddUrlIfFaulting(url)
.ContinueWith(t => ReadResponse(() => t.Result, ConvertStreamToBytes))
.ContinueWith(task => RetryIfNeedTo(task, ReadResponseBytesAsync))
.Unwrap())
.Unwrap());
}
public Task <byte[]> ReadResponseBytesAsync()
{
return(WaitForTask.ContinueWith(_ => webRequest
.GetResponseAsync()
.ConvertSecurityExceptionToServerNotFound()
.AddUrlIfFaulting(webRequest.RequestUri)
.ContinueWith(t => ReadResponse(() => t.Result, ConvertStreamToBytes))
.ContinueWith(task => RetryIfNeedTo(task, ReadResponseBytesAsync))
.Unwrap())
.Unwrap());
}
/// <summary>
/// Begins the read response string.
/// </summary>
private Task <string> ReadResponseStringAsync()
{
return(WaitForTask.ContinueWith(_ => webRequest
.GetResponseAsync()
.ConvertSecurityExceptionToServerNotFound()
.AddUrlIfFaulting(webRequest.RequestUri)
.ContinueWith(t => ReadStringInternal(() => t.Result))
.ContinueWith(task => RetryIfNeedTo(task, ReadResponseStringAsync))
.Unwrap())
.Unwrap());
}
/// <summary>
/// Begins the read response string.
/// </summary>
private Task <string> ReadResponseStringAsync()
{
var requestMessage = new HttpRequestMessage(method, url);
return(WaitForTask.ContinueWith(_ => httpClient.SendAsync(requestMessage)
.ConvertSecurityExceptionToServerNotFound()
.AddUrlIfFaulting(url)
.ContinueWith(t => ReadStringInternal(() => t.Result))
.ContinueWith(task => RetryIfNeedTo(task, ReadResponseStringAsync))
.Unwrap())
.Unwrap());
}
/// <summary>
/// Begins the write operation
/// </summary>
public Task WriteAsync(byte[] byteArray)
{
postedData = byteArray;
return(WaitForTask.ContinueWith(_ => webRequest.GetRequestStreamAsync().ContinueWith(t =>
{
var dataStream = new GZipStream(t.Result, CompressionMode.Compress);
using (dataStream)
{
dataStream.Write(byteArray, 0, byteArray.Length);
dataStream.Close();
}
})).Unwrap());
}
public Task <WebResponse> RawExecuteRequestAsync()
{
if (requestSendToServer)
{
throw new InvalidOperationException("Request was already sent to the server, cannot retry request.");
}
requestSendToServer = true;
webRequest.AllowReadStreamBuffering = false;
webRequest.AllowWriteStreamBuffering = false;
return(WaitForTask.ContinueWith(_ => webRequest
.GetResponseAsync()
.ConvertSecurityExceptionToServerNotFound()
.AddUrlIfFaulting(webRequest.RequestUri))
.Unwrap());
}
/// <summary>
/// Begins the read response string.
/// </summary>
private Task <string> ReadResponseStringAsync()
{
if (requestSendToServer)
{
throw new InvalidOperationException("Request was already sent to the server, cannot retry request.");
}
requestSendToServer = true;
return(WaitForTask.ContinueWith(_ => webRequest
.GetResponseAsync()
.ConvertSecurityExceptionToServerNotFound()
.AddUrlIfFaulting(webRequest.RequestUri)
.ContinueWith(t => ReadStringInternal(() => t.Result))
.ContinueWith(task => RetryIfNeedTo(task, ReadResponseStringAsync))
.Unwrap())
.Unwrap());
}
/// <summary>
/// Begins the write operation
/// </summary>
public Task WriteAsync(string data)
{
return(WaitForTask.ContinueWith(_ =>
webRequest.GetRequestStreamAsync()
.ContinueWith(task =>
{
Stream dataStream = factory.DisableRequestCompression == false ?
new GZipStream(task.Result, CompressionMode.Compress) :
task.Result;
var streamWriter = new StreamWriter(dataStream, Encoding.UTF8);
return streamWriter.WriteAsync(data)
.ContinueWith(writeTask =>
{
streamWriter.Dispose();
dataStream.Dispose();
task.Result.Dispose();
return writeTask;
}).Unwrap();
}).Unwrap())
.Unwrap());
}
public void WaitFor(float seconds, Action callback)
{
WaitForTask task = new WaitForTask(seconds, callback);
m_tasks.Add(task);
}
public Task <IObservable <string> > ServerPullAsync(int retries = 0)
{
return(WaitForTask.ContinueWith(__ =>
{
webRequest.AllowReadStreamBuffering = false;
webRequest.AllowWriteStreamBuffering = false;
webRequest.Headers["Requires-Big-Initial-Download"] = "True";
return webRequest.GetResponseAsync()
.ContinueWith(task =>
{
var stream = task.Result.GetResponseStream();
var observableLineStream = new ObservableLineStream(stream, () =>
{
webRequest.Abort();
try
{
task.Result.Close();
}
catch (Exception)
{
// we expect an exception, because we aborted the connection
}
});
observableLineStream.Start();
return (IObservable <string>)observableLineStream;
})
.ContinueWith(task =>
{
var webException = task.Exception.ExtractSingleInnerException() as WebException;
if (webException == null || retries >= 3 || disabledAuthRetries)
{
return task; // effectively throw
}
var httpWebResponse = webException.Response as HttpWebResponse;
if (httpWebResponse == null ||
(httpWebResponse.StatusCode != HttpStatusCode.Unauthorized &&
httpWebResponse.StatusCode != HttpStatusCode.Forbidden &&
httpWebResponse.StatusCode != HttpStatusCode.PreconditionFailed))
{
return task; // effectively throw
}
if (httpWebResponse.StatusCode == HttpStatusCode.Forbidden)
{
HandleForbiddenResponseAsync(httpWebResponse);
return task;
}
var authorizeResponse = HandleUnauthorizedResponseAsync(httpWebResponse);
if (authorizeResponse == null)
{
return task; // effectively throw
}
return authorizeResponse
.ContinueWith(_ =>
{
_.Wait(); //throw on error
return ServerPullAsync(retries + 1);
})
.Unwrap();
}).Unwrap();
})
.Unwrap());
}
