private void ParseLine(string line)
{
if (m_parsedMessage == null)
{
m_parsedMessage = new ServerSentEventsMessage();
}
if (m_lastChunk.Length > 0)
{
line = m_lastChunk.Append(line).ToString();
m_lastChunk.Clear();
}
if (line.StartsWith(":", StringComparison.OrdinalIgnoreCase))
{
return;
}
if (line.StartsWith("event:", StringComparison.OrdinalIgnoreCase))
{
m_parsedMessage.Event = line.Substring(6).Trim();
}
else if (line.StartsWith("id:", StringComparison.OrdinalIgnoreCase))
{
m_parsedMessage.Id = line.Substring(3).Trim();
}
else if (line.StartsWith("data:", StringComparison.OrdinalIgnoreCase))
{
m_parsedMessage.Data += line.Substring(5).Trim(); // ? + '\n'; // TODO: Use StringBuilder and remove last \n
}
}
private readonly StringBuilder m_lastChunk = new StringBuilder(); // TODO: Specify size
IEnumerable <ServerSentEventsMessage> IServerSentEventsMessageParser.Parse(ArraySegment <byte> buffer)
{
int lineStart = buffer.Offset;
int currentPosition = lineStart;
int lineLength = 0;
for ( ; currentPosition < buffer.Count; currentPosition++)
{
if (!IsCarrierReturnSymbol(buffer.Array[currentPosition]))
{
continue;
}
if (currentPosition < buffer.Count - 1 &&
buffer.Array[currentPosition] == ByteCR &&
buffer.Array[currentPosition + 1] == ByteLF
)
{
currentPosition++;
}
lineLength = currentPosition + 1 - lineStart;
if (lineLength <= 2 && m_parsedMessage != null)
{
yield return(m_parsedMessage);
m_parsedMessage = null;
}
else
{
ParseLine(Encoding.UTF8.GetString(buffer.Array, lineStart, lineLength));
}
lineStart = currentPosition + 1;
}
if (lineLength < buffer.Count && currentPosition != lineStart)
{
m_lastChunk.Append(Encoding.UTF8.GetString(buffer.Array, lineStart, currentPosition - lineStart));
}
}