private async Task ReadBody()
{
Exception?error = null;
try
{
while (true)
{
var memory = _bodyInputPipe !.Writer.GetMemory();
var read = await AsyncIO !.ReadAsync(memory);
// End of body
if (read == 0)
{
break;
}
// Read was not canceled because of incoming write or IO stopping
if (read != -1)
{
_consumedBytes += read;
_bodyInputPipe.Writer.Advance(read);
}
if (_consumedBytes > MaxRequestBodySize)
{
IISBadHttpRequestException.Throw(RequestRejectionReason.RequestBodyTooLarge);
}
var result = await _bodyInputPipe.Writer.FlushAsync();
if (result.IsCompleted || result.IsCanceled)
{
break;
}
}
}
catch (ConnectionResetException ex)
{
AbortIO(clientDisconnect: true);
error = ex;
}
catch (Http.BadHttpRequestException ex)
{
// Similar to a ConnectionResetException, this shouldn't be logged as an "Unexpected exception."
// This should be logged by whatever catches it. Likely IISHttpContextOfT.ProcessRequestsAsync().
error = ex;
}
catch (Exception ex)
{
error = ex;
Log.UnexpectedError(_logger, nameof(IISHttpContext), ex);
}
finally
{
_bodyInputPipe !.Writer.Complete(error);
}
}
private void InitializeRequestIO()
{
Debug.Assert(!HasStartedConsumingRequestBody);
if (RequestHeaders.ContentLength > MaxRequestBodySize)
{
IISBadHttpRequestException.Throw(RequestRejectionReason.RequestBodyTooLarge);
}
HasStartedConsumingRequestBody = true;
EnsureIOInitialized();
_bodyInputPipe = new Pipe(new PipeOptions(_memoryPool, readerScheduler: PipeScheduler.ThreadPool, minimumSegmentSize: MinAllocBufferSize));
_readBodyTask = ReadBody();
}