private static async Task WriteToStream(IFastSerializable serializable, Stream targetStream, CancellationToken token)
{
// FastSerialization requests the length of the stream before serializing to the stream.
// If the stream is a response stream, requesting the length or setting the position is
// not supported. Create an intermediate buffer if testing the stream fails.
// This can use a huge amount of memory if the IFastSerializable is very large.
// CONSIDER: Update FastSerialization to not get the length or attempt to reset the position.
bool useIntermediateStream = false;
try
{
_ = targetStream.Length;
}
catch (NotSupportedException)
{
useIntermediateStream = true;
}
if (useIntermediateStream)
{
using var intermediateStream = new MemoryStream();
var serializer = new Serializer(intermediateStream, serializable, leaveOpen: true);
serializer.Close();
intermediateStream.Position = 0;
await intermediateStream.CopyToAsync(targetStream, 0x10000, token);
}
else
{
var serializer = new Serializer(targetStream, serializable, leaveOpen: true);
serializer.Close();
}
}
public static void ToObjectData(IFastSerializable obj, SerializationInfo info)
{
SerializationWriter writer = new SerializationWriter();
obj.Serialize(writer);
byte[] result = writer.ToArray();
info.AddValue("fast$", Convert.ToBase64String(result));
}
public static void FromObjectData(IFastSerializable obj, SerializationInfo info)
{
string serial = info.GetString("fast$");
byte[] binary = Convert.FromBase64String(serial);
MemoryStream stream = new MemoryStream(binary);
SerializationReader reader = new SerializationReader(stream);
obj.Deserialize(reader);
}
private static Func <Stream, CancellationToken, Task> ConvertFastSerializeAction(Func <CancellationToken, Task <IFastSerializable> > action)
{
return(async(stream, token) =>
{
IFastSerializable fastSerializable = await action(token);
// FastSerialization requests the length of the stream before serializing to the stream.
// If the stream is a response stream, requesting the length or setting the position is
// not supported. Create an intermediate buffer if testing the stream fails.
// This can use a huge amount of memory if the IFastSerializable is very large.
// CONSIDER: Update FastSerialization to not get the length or attempt to reset the position.
bool useIntermediateStream = false;
try
{
_ = stream.Length;
}
catch (NotSupportedException)
{
useIntermediateStream = true;
}
if (useIntermediateStream)
{
using var intermediateStream = new MemoryStream();
var serializer = new Serializer(intermediateStream, fastSerializable, leaveOpen: true);
serializer.Close();
intermediateStream.Position = 0;
await intermediateStream.CopyToAsync(stream, 0x10000, token);
}
else
{
var serializer = new Serializer(stream, fastSerializable, leaveOpen: true);
serializer.Close();
}
});
}
public static void ToObjectData(IFastSerializable obj, SerializationInfo info)
{
SerializationWriter writer = new SerializationWriter();
obj.Serialize(writer);
byte[] result = writer.ToArray();
info.AddValue("fast$", Convert.ToBase64String(result));
}
public static void FromObjectData(IFastSerializable obj, SerializationInfo info)
{
string serial = info.GetString("fast$");
byte[] binary = Convert.FromBase64String(serial);
MemoryStream stream = new MemoryStream(binary);
SerializationReader reader = new SerializationReader(stream);
obj.Deserialize(reader);
}
