/// <summary>
/// Read a Request from the given stream.
///
/// The total request size must be less than 1MB.
/// </summary>
/// <returns>null if the Request was too large, the Request otherwise.</returns>
public static async Task <ServerRequest> ReadAsync(Stream inStream, CancellationToken cancellationToken)
{
// Read the length of the request
var lengthBuffer = new byte[4];
ServerLogger.Log("Reading length of request");
await ServerProtocol.ReadAllAsync(inStream, lengthBuffer, 4, cancellationToken).ConfigureAwait(false);
var length = BitConverter.ToInt32(lengthBuffer, 0);
// Back out if the request is > 1MB
if (length > 0x100000)
{
ServerLogger.Log("Request is over 1MB in length, cancelling read.");
return(null);
}
cancellationToken.ThrowIfCancellationRequested();
// Read the full request
var requestBuffer = new byte[length];
await ServerProtocol.ReadAllAsync(inStream, requestBuffer, length, cancellationToken).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
ServerLogger.Log("Parsing request");
// Parse the request into the Request data structure.
using (var reader = new BinaryReader(new MemoryStream(requestBuffer), Encoding.Unicode))
{
var protocolVersion = reader.ReadUInt32();
var argumentCount = reader.ReadUInt32();
var argumentsBuilder = new List <RequestArgument>((int)argumentCount);
for (var i = 0; i < argumentCount; i++)
{
cancellationToken.ThrowIfCancellationRequested();
argumentsBuilder.Add(RequestArgument.ReadFromBinaryReader(reader));
}
return(new ServerRequest(protocolVersion, argumentsBuilder));
}
}
/// <summary>
/// May throw exceptions if there are pipe problems.
/// </summary>
/// <param name="stream"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public static async Task <ServerResponse> ReadAsync(Stream stream, CancellationToken cancellationToken = default(CancellationToken))
{
ServerLogger.Log("Reading response length");
// Read the response length
var lengthBuffer = new byte[4];
await ServerProtocol.ReadAllAsync(stream, lengthBuffer, 4, cancellationToken).ConfigureAwait(false);
var length = BitConverter.ToUInt32(lengthBuffer, 0);
// Read the response
ServerLogger.Log("Reading response of length {0}", length);
var responseBuffer = new byte[length];
await ServerProtocol.ReadAllAsync(
stream,
responseBuffer,
responseBuffer.Length,
cancellationToken)
.ConfigureAwait(false);
using (var reader = new BinaryReader(new MemoryStream(responseBuffer), Encoding.Unicode))
{
var responseType = (ResponseType)reader.ReadInt32();
switch (responseType)
{
case ResponseType.Completed:
return(CompletedServerResponse.Create(reader));
case ResponseType.MismatchedVersion:
return(new MismatchedVersionServerResponse());
case ResponseType.Shutdown:
return(ShutdownServerResponse.Create(reader));
case ResponseType.Rejected:
return(new RejectedServerResponse());
default:
throw new InvalidOperationException("Received invalid response type from server.");
}
}
}