private void ProcessOpen() {
messageSource.Process();
while (messageSource.AvailableMessageNo > 0) {
byte[] message = messageSource.EmitMessage();
if (message != null && message.Length > 0) {
DecodeMessage(message);
}
}
if (messageSource.State == WebChannelState.Closed || messageSource.State == WebChannelState.InitFailed) {
State = WebChannelState.Closed;
}
}
public void Process()
{
// test for invalid state
if (State == WebChannelState.Closed || State == WebChannelState.InitFailed)
{
return;
}
source.Process();
if (source.State == WebChannelState.Closed)
{
State = WebChannelState.Closed;
return;
}
if (State == WebChannelState.InitFailed)
{
State = WebChannelState.InitFailed;
return;
}
if (State == WebChannelState.Initializing)
{
// only snoop new messages if still initializing
int messageNo = source.AvailableMessageNo;
while (messageNo > snoopedBitNo)
{
byte[] bit = source.SnoopMessage(snoopedBitNo);
if (bit.Length <= 0)
{
throw new InvalidOperationException();
}
messageBits.Add(bit);
snoopedBitNo += 1;
}
// try to extract a header
if (messageHeader.Length == 0)
{
int headerLength = ExtractHeaderLength();
if (headerLength > 0)
{
messageHeader = ExtractHeader(headerLength);
missingContentLength = ExtractContentLength(messageHeader);
}
}
// try to extract message content
if (messageHeader.Length > 0 && missingContentLength > 0)
{
messageContent = ExtractContent(messageHeader.Length, missingContentLength);
if (messageContent.Length >= 0)
{
// first message extraction successful
PostMessage(messageHeader.Length, missingContentLength);
BecomeOpen();
}
}
// or go with no content if this is not required
if (messageHeader.Length > 0 && missingContentLength == 0)
{
PostMessage(messageHeader.Length, 0);
BecomeOpen();
}
}
else
{
// read new messages
int messageNo = source.AvailableMessageNo;
if (messageNo > 0)
{
byte[] bit = source.EmitMessage();
if (bit.Length == 0)
{
throw new InvalidOperationException();
}
messageBits.Add(bit);
}
// try to extract a header
if (messageHeader.Length == 0)
{
int headerLength = ExtractHeaderLength();
if (headerLength > 0)
{
messageHeader = ExtractHeader(headerLength);
missingContentLength = ExtractContentLength(messageHeader);
}
}
// try to extract message content
if (messageHeader.Length > 0 && missingContentLength > 0)
{
messageContent = ExtractContent(messageHeader.Length, missingContentLength);
if (messageContent.Length >= 0)
{
PostMessage(messageHeader.Length, missingContentLength);
}
}
}
}
