internal HttpState(WebRequest request, byte[] outgoingData, object userState, HttpPollAction pollAction)
{
this.Request = request;
this.OutgoingData = outgoingData;
this.UserState = userState;
this.PollAction = pollAction;
}
private string GenerateURI(HttpPollAction pollAction)
{
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append("http://");
stringBuilder.Append(gatewayIP);
stringBuilder.Append("/gateway/gateway.dll?");
switch (pollAction)
{
case HttpPollAction.Open:
stringBuilder.Append("Action=open&");
stringBuilder.Append("Server=NS&");
stringBuilder.Append("IP=" + ConnectivitySettings.Host);
break;
case HttpPollAction.Poll:
stringBuilder.Append("Action=poll&");
if (useLifespan)
{
stringBuilder.Append("Lifespan=3&");
}
stringBuilder.Append("SessionID=" + SessionID);
break;
case HttpPollAction.None:
stringBuilder.Append("SessionID=" + SessionID);
break;
}
return(stringBuilder.ToString());
}
public override void Send(byte[] outgoingData, object userState)
{
if (opened || (null != (outgoingData = GetOpenOrClosePacket(outgoingData))))
{
if (isWebRequestInProcess)
{
lock (SyncObject)
{
sendingQueue.Enqueue(new QueueState(outgoingData, userState));
action = HttpPollAction.None;
}
}
else
{
isWebRequestInProcess = true;
HttpPollAction oldAction = action;
lock (SyncObject)
{
action = HttpPollAction.None;
if (pollTimer.Enabled)
{
pollTimer.Stop();
}
}
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(GenerateURI(oldAction));
ConnectivitySettings.SetupWebRequest(request);
request.Accept = "*/*";
request.Method = "POST";
request.KeepAlive = true;
request.AllowAutoRedirect = false;
request.AllowWriteStreamBuffering = false;
request.ContentLength = outgoingData.Length;
request.Headers.Add("Pragma", "no-cache");
// Set timeouts (10+40=50) = PNG average interval
request.Timeout = 10000; // 10 seconds for GetRequestStream(). Timeout error occurs when the server is busy.
request.ReadWriteTimeout = 40000; // 40 seconds for Read()/Write(). PNG interval is 45-60, so timeout must be <= 40.
// Bypass msnp blockers
request.ContentType = "text/html; charset=UTF-8";
request.UserAgent = @"Mozilla/5.0 (Windows NT 6.1) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.65 Safari/535.11";
request.Headers.Add("X-Requested-Session-Content-Type", "text/html");
// Enable GZIP
request.AutomaticDecompression = Settings.EnableGzipCompressionForWebServices ? DecompressionMethods.GZip : DecompressionMethods.None;
// Don't block current thread.
HttpState httpState = new HttpState(request, outgoingData, userState, oldAction);
request.BeginGetRequestStream(EndGetRequestStreamCallback, httpState);
}
}
}
private byte[] GetOpenOrClosePacket(byte[] outgoingData)
{
if (outgoingData.Length > 4 && outgoingData[3] == ' ')
{
// Be fast...
switch ((char)outgoingData[0])
{
case 'V': // VER
openState[0] = (outgoingData[1] == 'E' && outgoingData[2] == 'R');
openCommand = NetworkMessage.AppendArray(openCommand, outgoingData);
break;
case 'C': // CVR
openState[1] = (outgoingData[1] == 'V' && outgoingData[2] == 'R');
openCommand = NetworkMessage.AppendArray(openCommand, outgoingData);
break;
case 'U': // USR
openState[2] = (outgoingData[1] == 'S' && outgoingData[2] == 'R');
openCommand = NetworkMessage.AppendArray(openCommand, outgoingData);
break;
case 'O': // OUT
openState[3] = (outgoingData[1] == 'U' && outgoingData[2] == 'T');
// Don't buffer OUT packet
break;
}
}
if (openState.Get(0) && openState.Get(1) && openState.Get(2))
{
opened = true;
action = HttpPollAction.Open;
return(openCommand);
}
else if (openState.Get(3))
{
// Special case, not connected, but the packet is OUT
isWebRequestInProcess = false;
// This fires Disconnected event (send only 1 OUT packet)
if (isWebResponseHeadersProcessed)
{
return(outgoingData);
}
else
{
isWebResponseHeadersProcessed = false;
OnDisconnected();
return(null);
}
}
return(null); // Connection has not been established yet
}
private void pollTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
byte[] buffer = new byte[0];
List <object> userStates = new List <object>();
lock (SyncObject)
{
while (sendingQueue.Count > 0)
{
QueueState queueState = sendingQueue.Dequeue();
if (queueState.UserState is Array)
{
foreach (object us in queueState.UserState as object[])
{
if (!userStates.Contains(us))
{
userStates.Add(us);
}
}
}
else
{
if (!userStates.Contains(queueState.UserState))
{
userStates.Add(queueState.UserState);
}
}
buffer = NetworkMessage.AppendArray(buffer, queueState.Data);
if (buffer.Length > MaxAllowedPacket)
{
break;
}
}
action = (buffer.Length > 0) ? HttpPollAction.None : HttpPollAction.Poll;
}
Send(buffer, userStates.ToArray());
}
internal HttpState(WebRequest request, byte[] outgoingData, object userState, HttpPollAction pollAction)
{
this.Request = request;
this.OutgoingData = outgoingData;
this.UserState = userState;
this.PollAction = pollAction;
}
private void pollTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
byte[] buffer = new byte[0];
List<object> userStates = new List<object>();
lock (SyncObject)
{
while (sendingQueue.Count > 0)
{
QueueState queueState = sendingQueue.Dequeue();
if (queueState.UserState is Array)
{
foreach (object us in queueState.UserState as object[])
{
if (!userStates.Contains(us))
userStates.Add(us);
}
}
else
{
if (!userStates.Contains(queueState.UserState))
userStates.Add(queueState.UserState);
}
buffer = NetworkMessage.AppendArray(buffer, queueState.Data);
if (buffer.Length > MaxAllowedPacket)
break;
}
action = (buffer.Length > 0) ? HttpPollAction.None : HttpPollAction.Poll;
}
Send(buffer, userStates.ToArray());
}
private byte[] GetOpenOrClosePacket(byte[] outgoingData)
{
if (outgoingData.Length > 4 && outgoingData[3] == ' ')
{
// Be fast...
switch ((char)outgoingData[0])
{
case 'V': // VER
openState[0] = (outgoingData[1] == 'E' && outgoingData[2] == 'R');
openCommand = NetworkMessage.AppendArray(openCommand, outgoingData);
break;
case 'C': // CVR
openState[1] = (outgoingData[1] == 'V' && outgoingData[2] == 'R');
openCommand = NetworkMessage.AppendArray(openCommand, outgoingData);
break;
case 'U': // USR
openState[2] = (outgoingData[1] == 'S' && outgoingData[2] == 'R');
openCommand = NetworkMessage.AppendArray(openCommand, outgoingData);
break;
case 'O': // OUT
openState[3] = (outgoingData[1] == 'U' && outgoingData[2] == 'T');
// Don't buffer OUT packet
break;
}
}
if (openState.Get(0) && openState.Get(1) && openState.Get(2))
{
opened = true;
action = HttpPollAction.Open;
return openCommand;
}
else if (openState.Get(3))
{
// Special case, not connected, but the packet is OUT
isWebRequestInProcess = false;
// This fires Disconnected event (send only 1 OUT packet)
if (isWebResponseHeadersProcessed)
{
return outgoingData;
}
else
{
isWebResponseHeadersProcessed = false;
OnDisconnected();
return null;
}
}
return null; // Connection has not been established yet
}
private string GenerateURI(HttpPollAction pollAction)
{
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append("http://");
stringBuilder.Append(gatewayIP);
stringBuilder.Append("/gateway/gateway.dll?");
switch (pollAction)
{
case HttpPollAction.Open:
stringBuilder.Append("Action=open&");
stringBuilder.Append("Server=NS&");
stringBuilder.Append("IP=" + ConnectivitySettings.Host);
break;
case HttpPollAction.Poll:
stringBuilder.Append("Action=poll&");
if (useLifespan)
{
stringBuilder.Append("Lifespan=3&");
}
stringBuilder.Append("SessionID=" + SessionID);
break;
case HttpPollAction.None:
stringBuilder.Append("SessionID=" + SessionID);
break;
}
return stringBuilder.ToString();
}
public override void Send(byte[] outgoingData, object userState)
{
if (opened || (null != (outgoingData = GetOpenOrClosePacket(outgoingData))))
{
if (isWebRequestInProcess)
{
lock (SyncObject)
{
sendingQueue.Enqueue(new QueueState(outgoingData, userState));
action = HttpPollAction.None;
}
}
else
{
isWebRequestInProcess = true;
HttpPollAction oldAction = action;
lock (SyncObject)
{
action = HttpPollAction.None;
if (pollTimer.Enabled)
{
pollTimer.Stop();
}
}
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(GenerateURI(oldAction));
ConnectivitySettings.SetupWebRequest(request);
request.Accept = "*/*";
request.Method = "POST";
request.KeepAlive = true;
request.AllowAutoRedirect = false;
request.AllowWriteStreamBuffering = false;
request.ContentLength = outgoingData.Length;
request.Headers.Add("Pragma", "no-cache");
// Set timeouts (10+40=50) = PNG average interval
request.Timeout = 10000; // 10 seconds for GetRequestStream(). Timeout error occurs when the server is busy.
request.ReadWriteTimeout = 40000; // 40 seconds for Read()/Write(). PNG interval is 45-60, so timeout must be <= 40.
// Bypass msnp blockers
request.ContentType = "text/html; charset=UTF-8";
request.UserAgent = @"Mozilla/5.0 (Windows NT 6.1) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.65 Safari/535.11";
request.Headers.Add("X-Requested-Session-Content-Type", "text/html");
// Enable GZIP
request.AutomaticDecompression = Settings.EnableGzipCompressionForWebServices ? DecompressionMethods.GZip : DecompressionMethods.None;
// Don't block current thread.
HttpState httpState = new HttpState(request, outgoingData, userState, oldAction);
request.BeginGetRequestStream(EndGetRequestStreamCallback, httpState);
}
}
}
