// Restore message properties before passing the message to application
private void PrepareLargeMessage(LargeMessageProperties largeMessageProperties)
{
if (this.stream != null)
{
this.stream.Position = 0;
if (this.useBody)
{
byte[] fullBytes = new byte[this.stream.Length];
this.stream.Read(fullBytes, 0, fullBytes.Length);
if (this.message.Body is Stream)
{
this.message.BodyStream.Dispose();
((Stream)this.message.Body).Dispose();
this.message.BodyStream = new MemoryStream(fullBytes, 0, fullBytes.Length);
this.message.Body = this.message.BodyStream;
}
else
{
// The body has to be set to null so that the formatter read method (deserialize) is invoked
this.message.Body = null;
try
{
this.message.BodyStream.Dispose();
}
catch
{
// Don't do anything
}
this.message.BodyStream = new MemoryStream(fullBytes, 0, fullBytes.Length);
}
}
else
{
try
{
this.message.BodyStream.Dispose();
}
catch
{
// Don't do anything
}
this.message.BodyStream = this.stream;
}
}
else
{
this.message.Body = null;
this.message.BodyStream = new MemoryStream();
}
// Setting the fields to that passed from the application
this.message.AppSpecific = largeMessageProperties.AppSpecific;
this.message.CorrelationId = largeMessageProperties.CorrelationId;
// Setting the message Label to the application message label from the sender side
string messageLabel = this.message.Label;
try
{
this.message.Label = messageLabel.Substring(0, messageLabel.LastIndexOf(".part.", StringComparison.OrdinalIgnoreCase));
}
catch (ArgumentOutOfRangeException)
{
this.message.Label = messageLabel;
}
}
// Return the large message properties embedded in the control (header/trailer) fragments
private LargeMessageProperties GetLargeMessageHeader(Message headerMessage)
{
byte[] b = null;
if (headerMessage.Body != null)
{
if (headerMessage.Body is Stream)
{
b = Utilities.GetBytesFromStream((Stream)headerMessage.Body);
}
else
{
b = (byte[])headerMessage.Body;
}
this.useBody = true;
}
else if (headerMessage.BodyStream != null)
{
Stream s = headerMessage.BodyStream;
b = new byte[s.Length];
s.Read(b, 0, b.Length);
s.Position = 0;
this.useBody = false;
}
LargeMessageProperties largeMessageProperties = new LargeMessageProperties();
byte[] fragmentCountBytes = new byte[4];
byte[] appSpecificBytes = new byte[4];
byte[] correlationIdLengthBytes = new byte[4];
System.Buffer.BlockCopy(b, 0, fragmentCountBytes, 0, 4);
largeMessageProperties.FragmentCount = BitConverter.ToInt32(fragmentCountBytes, 0);
System.Buffer.BlockCopy(b, 4, appSpecificBytes, 0, 4);
largeMessageProperties.AppSpecific = BitConverter.ToInt32(appSpecificBytes, 0);
System.Buffer.BlockCopy(b, 8, correlationIdLengthBytes, 0, 4);
int correlationIdLength = BitConverter.ToInt32(correlationIdLengthBytes, 0);
if (correlationIdLength != 0)
{
byte[] correlationIdBytes = new byte[correlationIdLength];
System.Buffer.BlockCopy(b, 12, correlationIdBytes, 0, correlationIdLength);
largeMessageProperties.CorrelationId = Encoding.Unicode.GetString(correlationIdBytes);
}
else
{
largeMessageProperties.CorrelationId = Utilities.GetEmptyCorrelationIdStr();
}
return largeMessageProperties;
}
