private static Task <HttpWebResponse> GetResponseWithRetryAsync(IHiggsRequest higgsRequest, int retries)
{
if (retries < 0)
{
throw new ArgumentOutOfRangeException("Invalid number of retries to make.");
}
Func <Task <WebResponse>, Task <HttpWebResponse> > proceedToNextStep = null;
Func <Task <HttpWebResponse> > doStep = () =>
{
try
{
WebRequest request = higgsRequest.GetRequest();
Task <WebResponse> ds = Task.Factory.FromAsync <WebResponse>(
request.BeginGetResponse,
request.EndGetResponse,
null
);
return(ds.ContinueWith(proceedToNextStep).Unwrap());
}
catch (IOException e)
{
return(proceedToNextStep(null)); //Something to do with Mono SSL occasionally breaking down
}
};
proceedToNextStep = prevTask =>
{
if (prevTask == null)
{
if (--retries <= 0)
{
throw new Exception(
"There seems to be an issue with the connection to Binder. Please retry again later.");
}
return(doStep());
}
if (prevTask.IsCanceled)
{
throw new TaskCanceledException();
}
if (prevTask.IsFaulted && --retries > 0)
{
return(doStep());
}
var tcs = new TaskCompletionSource <HttpWebResponse>();
try
{
tcs.SetResult((HttpWebResponse)prevTask.Result);
}
catch (AggregateException ex)
{
if (--retries > 0)
{
return(doStep());
}
throw new HiggsClientException("The request has failed to process. Please try again", ex);
}
return(tcs.Task);
};
return(doStep());
}
private static Task<HttpWebResponse> GetResponseWithRetryAsync(IHiggsRequest higgsRequest, int retries)
{
if (retries < 0)
throw new ArgumentOutOfRangeException("Invalid number of retries to make.");
Func<Task<WebResponse>, Task<HttpWebResponse>> proceedToNextStep = null;
Func<Task<HttpWebResponse>> doStep = () =>
{
try
{
WebRequest request = higgsRequest.GetRequest();
Task<WebResponse> ds = Task.Factory.FromAsync<WebResponse>(
request.BeginGetResponse,
request.EndGetResponse,
null
);
return ds.ContinueWith(proceedToNextStep).Unwrap();
}
catch (IOException e)
{
return proceedToNextStep(null); //Something to do with Mono SSL occasionally breaking down
}
};
proceedToNextStep = prevTask =>
{
if (prevTask == null)
{
if (--retries <= 0)
{
throw new Exception(
"There seems to be an issue with the connection to Binder. Please retry again later.");
}
return doStep();
}
if (prevTask.IsCanceled)
throw new TaskCanceledException();
if (prevTask.IsFaulted && --retries > 0)
return doStep();
var tcs = new TaskCompletionSource<HttpWebResponse>();
try
{
tcs.SetResult((HttpWebResponse) prevTask.Result);
}
catch (AggregateException ex)
{
if (--retries > 0)
return doStep();
throw new HiggsClientException("The request has failed to process. Please try again", ex);
}
return tcs.Task;
};
return doStep();
}
