public WebSocketChannel(TcpChannel source) : this() {
if (source == null) throw new ArgumentNullException("source");
this.messageSource = source;
this.initSource = new HttpChannel(source);
this.State = WebChannelState.Initializing;
}
private void Process()
{
// wait for clients and process channels and changes
var resourceListener = new TcpListener(IPAddress.Parse("127.0.0.1"), 9242);
//var liveListener = new TcpListener(IPAddress.Parse("127.0.0.1"), 9234);
var liveWire = new LiveWire.LiveWireServer();
liveWire.Start();
resourceListener.Start();
//liveListener.Start();
Console.WriteLine("Started server on port 9242");
while (!stopSignal.WaitOne(16))
{
liveWire.Process();
// accept new clients
if (resourceListener.Pending())
{
var client = resourceListener.AcceptTcpClient();
//client.NoDelay = true;
//client.ReceiveTimeout = 1;
//client.SendTimeout = 1;
var baseChannel = new TcpChannel(client);
var channel = new HttpChannel(baseChannel);
//var channel = new WebSocketChannel(baseChannel);
AddChannelPrototype(channel);
}
// if (liveListener.Pending()) {
// var client = liveListener.AcceptTcpClient();
// var baseChannel = new TcpChannel(client);
// var channel = new WebSocketChannel(baseChannel);
// AddChannelPrototype(channel);
// }
List <IWebChannel> toClose = new List <IWebChannel>();
foreach (var c in channels)
{
c.Process();
if (c.State == WebChannelState.InitFailed || c.State == WebChannelState.Closed)
{
toClose.Add(c);
continue;
}
if (c.AvailableMessageNo > 0)
{
var wc = c as WebSocketChannel;
if (wc != null)
{
WebSocketMessage message = wc.EmitMessage();
string text = message.Text;
Console.WriteLine("received: " + text);
//string updateMsg = "{ 'type': 'request',
Console.WriteLine("circling that");
//string updateMsg = "{ 'sender': 'minority', 'type': 'config', 'update', 'content': 'sent to update division' }";
//Console.WriteLine("sending update: " + updateMsg);
//Thread.Sleep(1000);
JsonString str = JsonString.Parse(text);
str.AddTerminal("text", "tentacles");
wc.SendMessage(new WebSocketMessage(str.ToJsonString()));
wc.SendMessage(new WebSocketMessage("{\"type\":\"update\", \"subject\":\"content\" }"));
}
var hc = c as HttpChannel;
if (hc != null)
{
HttpMessage message = hc.EmitMessage();
//Console.WriteLine("message: ");
//Console.WriteLine(message.Header.ToString());
//Console.WriteLine(Encoding.UTF8.GetString(message.Content));
string resource = message.Header.Resource;
byte[] responseContent = new Services.ResourceWireServer().ProvideResource(resource);
HttpHeader responseHeader;
if (responseContent.Length > 0)
{
responseHeader = new HttpHeader(HttpMethod.Response, resource, message.Header.Version, HttpStatusCode.OK);
if (resource.EndsWith(".js"))
{
responseHeader.Fields.Add("Content-Type", "text/javascript; charset=UTF-8");
}
else if (resource.EndsWith(".html") || resource.Equals("/"))
{
responseHeader.Fields.Add("Content-Type", "text/html; charset=UTF-8");
}
else if (resource.EndsWith(".css"))
{
responseHeader.Fields.Add("Content-Type", "text/css; charset=UTF-8");
}
else if (resource.EndsWith(".ico"))
{
responseHeader.Fields.Add("Content-Type", "image/vnd.microsoft.icon");
}
else if (resource.EndsWith(".svg"))
{
responseHeader.Fields.Add("Content-Type", "image/svg+xml");
}
else
{
responseHeader.Fields.Add("Content-Type", "text/plain; charset=UTF-8");
}
responseHeader.Fields.Add("Content-Encoding", "identity");
responseHeader.Fields.Add("Content-Length", string.Format("{0}", responseContent.Length));
//responseHeader.Fields.Add("Transfer-Encoding", "identity");
responseHeader.Fields.Add("Connection", "close");
}
else
{
responseHeader = new HttpHeader(HttpMethod.Response, resource, message.Header.Version, HttpStatusCode.NotFound);
responseHeader.Fields.Add("Content-Length", "0");
//responseHeader.Fields.Add("Transfer-Encoding", "identity");
responseHeader.Fields.Add("Connection", "close");
}
responseHeader.Fields.Add("Server", "Irseny");
responseHeader.Fields.Add("Date", DateTime.UtcNow.ToString());
var response = new HttpMessage(responseHeader, responseContent);
hc.SendMessage(response);
hc.Close();
}
}
}
foreach (IWebChannel c in toClose)
{
c.Close();
Console.WriteLine("closed client " + channels.IndexOf(c));
channels.Remove(c);
}
}
foreach (var c in channels)
{
c.Close();
}
resourceListener.Stop();
}
private void ProcessInit() {
// continue initializing through the html channel
initSource.Process();
// stop processing if something went wrong
if (initSource.State == WebChannelState.Closed || initSource.State == WebChannelState.InitFailed) {
State = WebChannelState.InitFailed;
initSource = null;
}
// wait for the first header to arrive
if (initSource.AvailableMessageNo > 0) {
HttpHeader header = initSource.EmitMessage().Header;
string headerKey = string.Empty;
bool headerValid = false;
bool canRecover = false;
bool denySubprotocol = false;
bool denyExtension = false;
do {
// check the header for errors
if (header.Method != HttpMethod.Get) {
break;
}
// TODO optional origin
string connection;
if (!header.Fields.TryGetValue("Connection", out connection)) {
break;
}
if (!connection.ToLower().Contains("upgrade")) {
break;
}
string upgrade;
if (!header.Fields.TryGetValue("Upgrade", out upgrade)) {
break;
}
if (!upgrade.ToLower().Contains("websocket")) {
break;
}
if (!header.Fields.TryGetValue("Sec-WebSocket-Key", out headerKey)) {
break;
}
string sVersion;
if (header.Fields.TryGetValue("Sec-WebSocket-Version", out sVersion)) {
// TODO improve detection
bool acceptVersion = false;
if (sVersion.Contains("13")) {
acceptVersion = true;
}
if (!acceptVersion) {
headerValid = false;
canRecover = true;
HttpHeader response = new HttpHeader(header.Version, HttpStatusCode.UpgradeRequired);
response.Fields.Add("Sec-WebSocket-Version", "13");
initSource.SendMessage(new HttpMessage(response));
break;
}
}
// this implementation does not support subprotocols or extensions
// send null fields if these exist in the request
if (header.Fields.ContainsKey("Subprotocol")) {
denySubprotocol = true;
}
if (header.Fields.ContainsKey("Extension")) {
denyExtension = true;
}
// TODO optional handle resource or send 404 not found
headerValid = true;
} while (false);
if (!headerValid) {
if (!canRecover) {
// set the connection on ice if the setup failed
State = WebChannelState.InitFailed;
initSource.Close(false);
initSource = null;
}
} else {
// send an appropriate response header
HttpHeader response = new HttpHeader(HttpVersion.Version11, HttpStatusCode.SwitchingProtocols);
response.Fields.Add("Upgrade", "websocket");
response.Fields.Add("Connection", "Upgrade");
byte[] byteKey = Encoding.UTF8.GetBytes(headerKey + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11");
byte[] sha1Key = System.Security.Cryptography.SHA1.Create().ComputeHash(byteKey);
string base64Key = Convert.ToBase64String(sha1Key);
response.Fields.Add("Sec-WebSocket-Accept", base64Key);
if (denySubprotocol) {
response.Fields.Add("Subprotocol", "null");
}
if (denyExtension) {
response.Fields.Add("Extension", "null");
}
initSource.SendMessage(new HttpMessage(response));
// since the upgrade is done no more http communication is necessary
// ACK has to be sent first so initSource can not contain any websocket messages at this point
initSource.Flush();
initSource.Close(false);
initSource = null;
// the handshake has been completed
// messages can now be sent
State = WebChannelState.Open;
// continue with sending all pending messages
foreach (WebSocketMessage send in toSend) {
byte[] encoded = EncodeMessage(send);
messageSource.SendMessage(encoded);
}
toSend.Clear();
}
}
}
