/// <summary>
/// Create a carrier stream from the given stream and key sequence
/// </summary>
/// <param name="stream">Stream to find </param>
/// <returns>A new carrier stream </returns>
public BaseCarrierStream BuildCarrierStream(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
int longestMagicNumber = _carrierStreamTypes.Max(kvp => kvp.Key.Length);
byte[] magicNumberBuffer = new byte[longestMagicNumber];
int bytesRead = stream.Read(magicNumberBuffer, 0, longestMagicNumber);
ExportFactory <BaseCarrierStream, ICarrierStreamMetadata> factory =
_carrierStreamTypes.Where(kvp => kvp.Key.SequenceEqual(magicNumberBuffer.Take(kvp.Key.Length)))
.Select(kvp => kvp.Value)
.FirstOrDefault();
if (factory == null)
{
throw new InvalidOperationException(string.Format("CarrierStream not found for MagicNumber {0}",
Convert.ToBase64String(magicNumberBuffer)));
}
stream.Seek(0, SeekOrigin.Begin);
BaseCarrierStream carrierStream = factory.CreateExport().Value;
carrierStream.Initialize(stream);
return(carrierStream);
}
static void Main(string[] args)
{
CopyResource();
Random random = new Random(DateTime.UtcNow.Millisecond);
byte[] bytes = new byte[1000];
random.NextBytes(bytes);
using (BaseCarrierStream carrier = FACTORY.BuildCarrierStream(
File.Open(TEST_FILE, FileMode.Open)))
using (Stream stream = new MemoryStream(bytes))
{
carrier.Write(0, bytes, 0, bytes.Length);
byte[] read = new byte[bytes.Length];
int readLength = carrier.Read(0, read, 0, read.Length);
if (bytes.Length == readLength)
{
Console.WriteLine("Successfully read the correct number of bytes");
}
else
{
Console.WriteLine("Failed read the correct number of bytes, read {0} but expexted {1}",
readLength, bytes.Length);
}
bool mismatched = false;
for (int i = 0; i < bytes.Length; ++i)
{
if (read[i] == bytes[i])
{
continue;
}
Console.WriteLine("Byte mismatch at index {0}: read - {1}, write - {2}",
i, Convert.ToInt32(read[i]), Convert.ToInt32(bytes[i]));
mismatched = true;
}
if (mismatched)
{
Console.WriteLine("Read bytes don't equal written bytes");
}
else
{
Console.WriteLine("Read bytes equal written bytes");
}
}
Console.ReadLine();
}
