public void UpdateFromFrame(SettingsFrame frame, IFlowControlManager flowControlStateManager)
{
if (frame.EnablePush.HasValue)
{
EnablePush = frame.EnablePush.Value;
}
if (frame.HeaderTableSize.HasValue)
{
HeaderTableSize = frame.HeaderTableSize.Value;
}
if (frame.MaxConcurrentStreams.HasValue)
{
MaxConcurrentStreams = frame.MaxConcurrentStreams.Value;
}
if (frame.MaxFrameSize.HasValue)
{
MaxFrameSize = frame.MaxFrameSize.Value;
}
if (frame.MaxHeaderListSize.HasValue)
{
MaxHeaderListSize = frame.MaxHeaderListSize.Value;
}
if (frame.InitialWindowSize.HasValue)
{
InitialWindowSize = frame.InitialWindowSize.Value;
// Try and update the flow control manager's initial size
if (flowControlStateManager != null)
{
flowControlStateManager.InitialWindowSize = InitialWindowSize;
}
}
}
public void UpdateFromFrame (SettingsFrame frame, IFlowControlManager flowControlStateManager)
{
if (frame.EnablePush.HasValue)
EnablePush = frame.EnablePush.Value;
if (frame.HeaderTableSize.HasValue)
HeaderTableSize = frame.HeaderTableSize.Value;
if (frame.MaxConcurrentStreams.HasValue)
MaxConcurrentStreams = frame.MaxConcurrentStreams.Value;
if (frame.MaxFrameSize.HasValue)
MaxFrameSize = frame.MaxFrameSize.Value;
if (frame.MaxHeaderListSize.HasValue)
MaxHeaderListSize = frame.MaxHeaderListSize.Value;
if (frame.InitialWindowSize.HasValue) {
InitialWindowSize = frame.InitialWindowSize.Value;
// Try and update the flow control manager's initial size
if (flowControlStateManager != null)
flowControlStateManager.InitialWindowSize = InitialWindowSize;
}
}
async void read()
{
int rx = 0;
byte[] b = new byte[4096];
while (true)
{
try {
rx = await clientStream.ReadAsync(b, 0, b.Length);
} catch {
rx = -1;
}
if (rx > 0)
{
Console.WriteLine("RX: {0} bytes", rx);
for (int i = 0; i < rx; i++)
{
buffer.Add(b [i]);
}
while (true)
{
// We need at least 9 bytes to process the frame
// 9 octets is the frame header length
if (buffer.Count < 9)
{
break;
}
// Find out the frame length
// which is a 24 bit uint, so we need to convert this as c# uint is 32 bit
var flen = new byte[4];
flen [0] = 0x0;
flen [1] = buffer.ElementAt(0);
flen [2] = buffer.ElementAt(1);
flen [3] = buffer.ElementAt(2);
var frameLength = BitConverter.ToUInt32(flen.EnsureBigEndian(), 0);
// If we are expecting a payload that's bigger than what's in our buffer
// we should keep reading from the stream
if (buffer.Count - 9 < frameLength)
{
break;
}
// If we made it this far, the buffer has all the data we need, let's get it out to process
var data = buffer.GetRange(0, (int)frameLength + 9).ToArray();
// remove the processed info from the buffer
buffer.RemoveRange(0, (int)frameLength + 9);
// Get the Frame Type so we can instantiate the right subclass
var frameType = data [3]; // 4th byte in frame header is TYPE
// Don't need the flags yet
//var frameFlags = data [4]; // 5th byte is FLAGS
// we need to turn the stream id into a uint
var frameStreamIdData = new byte[4];
Array.Copy(data, 5, frameStreamIdData, 0, 4);
uint frameStreamId = Util.ConvertFromUInt31(frameStreamIdData.EnsureBigEndian());
Frame frame = null;
var ft = (FrameType)frameType;
switch (ft)
{
case FrameType.Data:
frame = new DataFrame();
break;
case FrameType.Headers:
frame = new HeadersFrame();
break;
case FrameType.Priority:
frame = new PriorityFrame();
break;
case FrameType.RstStream:
frame = new RstStreamFrame();
break;
case FrameType.Settings:
frame = new SettingsFrame();
break;
case FrameType.PushPromise:
frame = new PushPromiseFrame();
break;
case FrameType.Ping:
frame = new PingFrame();
break;
case FrameType.GoAway:
frame = new GoAwayFrame();
break;
case FrameType.WindowUpdate:
frame = new WindowUpdateFrame();
break;
case FrameType.Continuation:
frame = new ContinuationFrame();
break;
}
try {
// Call the specific subclass implementation to parse
if (frame != null)
{
frame.Parse(data);
}
} catch (Exception ex) {
Console.WriteLine("Parsing Frame Failed: " + ex);
throw ex;
}
// If we are waiting on the connection preface from server
// and it's the right frame type, set our resetevent
if (ft == FrameType.Settings &&
resetEventConnectionSettingsFrame != null &&
!resetEventConnectionSettingsFrame.IsSet)
{
var settingsFrame = frame as SettingsFrame;
// ack the settings from the server
settingsFrame.Ack = true;
await SendFrame(settingsFrame);
resetEventConnectionSettingsFrame.Set();
}
try {
if (frameStreamId == 0)
{
foreach (var s in Streams)
{
if (s.Value.State != StreamState.Closed)
{
s.Value.ProcessFrame(frame);
}
}
}
else
{
var stream = await GetStream(frameStreamId);
stream.ProcessFrame(frame);
}
} catch (Exception ex) {
Console.WriteLine("Error Processing Frame: " + ex);
throw ex;
}
}
}
else
{
// TODO: Connection error
//throw new Exception ("Connection Error");
break;
}
}
Disconnect();
}
public async Task Connect()
{
if (IsConnected())
{
return;
}
tcp = new TcpClient
{
// Disable Nagle for HTTP/2
NoDelay = true
};
await tcp.ConnectAsync(ConnectionSettings.Host, (int)ConnectionSettings.Port).ConfigureAwait(false);
if (ConnectionSettings.UseTls)
{
sslStream = new SslStream(tcp.GetStream(), false,
(sender, certificate, chain, sslPolicyErrors) => true);
#if NETCOREAPP2_1
// .NET Core 2.1 introduces SslClientAuthenticationOptions
// which allows us to set the SslApplicationProtocol (ALPN) which
// for HTTP/2 is required, and should be set to h2 for direct to TLS connections
// (h2c should be set for upgraded connections)
var authOptions = new SslClientAuthenticationOptions
{
ApplicationProtocols = new List <SslApplicationProtocol> {
SslApplicationProtocol.Http2
}, // ALPN h2
EnabledSslProtocols = System.Security.Authentication.SslProtocols.Tls12,
TargetHost = ConnectionSettings.Host,
ClientCertificates = ConnectionSettings.Certificates ?? new X509CertificateCollection()
};
await sslStream.AuthenticateAsClientAsync(
authOptions,
new CancellationToken(false))
.ConfigureAwait(false);
#else
// Fall back to no ALPN support for frameworks which don't support it
await sslStream.AuthenticateAsClientAsync(
ConnectionSettings.Host,
ConnectionSettings.Certificates ?? new X509CertificateCollection(),
System.Security.Authentication.SslProtocols.Tls12,
false).ConfigureAwait(false);
#endif
clientStream = sslStream;
}
else
{
clientStream = tcp.GetStream();
}
// Ensure we have a size for the stream '0'
flowControlManager.GetWindowSize(0);
// Send out preface data
var prefaceData = System.Text.Encoding.ASCII.GetBytes(ConnectionPreface);
await clientStream.WriteAsync(prefaceData, 0, prefaceData.Length).ConfigureAwait(false);
await clientStream.FlushAsync().ConfigureAwait(false);
// Start reading the stream on another thread
var readTask = Task.Factory.StartNew(() => {
try { Read(); }
catch (Exception ex) {
Log.Debug("Read error: " + ex);
Disconnect();
}
}, TaskCreationOptions.LongRunning);
readTask.ContinueWith(t => {
// TODO: Handle the error
Disconnect();
}, TaskContinuationOptions.OnlyOnFaulted).Forget();
// Start a thread to handle writing queued frames to the stream
var writeTask = Task.Factory.StartNew(Write, TaskCreationOptions.LongRunning);
writeTask.ContinueWith(t => {
// TODO: Handle the error
Disconnect();
}, TaskContinuationOptions.OnlyOnFaulted).Forget();
// Send initial blank settings frame
var s = new SettingsFrame();
if (ConnectionSettings.DisablePushPromise)
{
s.EnablePush = false;
}
await QueueFrame(s).ConfigureAwait(false);
}
public async Task Connect()
{
if (IsConnected())
{
return;
}
tcp = new TcpClient
{
// Disable Nagle for HTTP/2
NoDelay = true
};
await tcp.ConnectAsync(ConnectionSettings.Host, (int)ConnectionSettings.Port).ConfigureAwait(false);
if (ConnectionSettings.UseTls)
{
sslStream = new SslStream(tcp.GetStream(), false,
(sender, certificate, chain, sslPolicyErrors) => true);
await sslStream.AuthenticateAsClientAsync(
ConnectionSettings.Host,
ConnectionSettings.Certificates ?? new X509CertificateCollection(),
System.Security.Authentication.SslProtocols.Tls12,
false).ConfigureAwait(false);
clientStream = sslStream;
}
else
{
clientStream = tcp.GetStream();
}
// Ensure we have a size for the stream '0'
flowControlManager.GetWindowSize(0);
// Send out preface data
var prefaceData = System.Text.Encoding.ASCII.GetBytes(ConnectionPreface);
await clientStream.WriteAsync(prefaceData, 0, prefaceData.Length).ConfigureAwait(false);
await clientStream.FlushAsync().ConfigureAwait(false);
// Start reading the stream on another thread
var readTask = Task.Factory.StartNew(() =>
{
try { Read(); }
catch (Exception ex)
{
Log.Debug("Read error: " + ex);
Disconnect();
}
}, TaskCreationOptions.LongRunning);
readTask.ContinueWith(t =>
{
// TODO: Handle the error
Disconnect();
}, TaskContinuationOptions.OnlyOnFaulted).Forget();
// Start a thread to handle writing queued frames to the stream
var writeTask = Task.Factory.StartNew(Write, TaskCreationOptions.LongRunning);
writeTask.ContinueWith(t =>
{
// TODO: Handle the error
Disconnect();
}, TaskContinuationOptions.OnlyOnFaulted).Forget();
// Send initial blank settings frame
var s = new SettingsFrame();
if (ConnectionSettings.DisablePushPromise)
{
s.EnablePush = false;
}
await QueueFrame(s).ConfigureAwait(false);
}
public void Connect()
{
if (IsConnected())
{
return;
}
tcp = new TcpClient();
// Disable Nagle for HTTP/2
tcp.NoDelay = true;
tcp.Connect(ConnectionSettings.Host, (int)ConnectionSettings.Port);
if (ConnectionSettings.UseTls)
{
sslStream = new SslStream(tcp.GetStream(), false,
(sender, certificate, chain, sslPolicyErrors) => true);
sslStream.AuthenticateAsClient(
ConnectionSettings.Host,
ConnectionSettings.Certificates ?? new X509CertificateCollection(),
System.Security.Authentication.SslProtocols.Tls,
false);
clientStream = sslStream;
}
else
{
clientStream = tcp.GetStream();
}
// Ensure we have a size for the stream '0'
flowControlManager.GetWindowSize(0);
// Send out preface data
var prefaceData = System.Text.Encoding.ASCII.GetBytes(ConnectionPreface);
clientStream.Write(prefaceData, 0, prefaceData.Length);
clientStream.Flush();
// Start reading the stream on another thread
var readTask = new Thread(() => {
try { read(); }
catch (Exception ex)
{
Log.Debug("Read error: " + ex);
Disconnect();
}
Disconnect();
});
readTask.Start();
// Start a thread to handle writing queued frames to the stream
var writeTask = new Thread(() => {
try
{
write();
}
catch
{
Disconnect();
}
});
writeTask.Start();
// Send initial blank settings frame
var s = new SettingsFrame();
if (ConnectionSettings.DisablePushPromise)
{
s.EnablePush = false;
}
QueueFrame(s);
}
public async Task Connect()
{
if (IsConnected())
{
return;
}
tcp = new TcpClient();
// Disable Nagle for HTTP/2
tcp.NoDelay = true;
await tcp.ConnectAsync(ConnectionSettings.Host, (int)ConnectionSettings.Port).ConfigureAwait(false);
try
{
if (ConnectionSettings.UseTls)
{
clientStream = await ConnectionSettings.CreateStream(tcp);
}
else
{
clientStream = tcp.GetStream();
}
}
catch
{
if (!IsConnected())
{
tcp.Close();
}
throw;
}
// Ensure we have a size for the stream '0'
flowControlManager.GetWindowSize(0);
// Send out preface data
var prefaceData = System.Text.Encoding.ASCII.GetBytes(ConnectionPreface);
await clientStream.WriteAsync(prefaceData, 0, prefaceData.Length).ConfigureAwait(false);
await clientStream.FlushAsync().ConfigureAwait(false);
// Start reading the stream on another thread
var readTask = Task.Factory.StartNew(() => {
try { read(); }
catch (Exception ex) {
Log.Debug("Read error: " + ex);
Disconnect();
}
}, TaskCreationOptions.LongRunning);
readTask.ContinueWith(t => {
// TODO: Handle the error
Disconnect();
}, TaskContinuationOptions.OnlyOnFaulted).Forget();
// Start a thread to handle writing queued frames to the stream
var writeTask = Task.Factory.StartNew <Task>(write, TaskCreationOptions.LongRunning);
writeTask.ContinueWith(t => {
// TODO: Handle the error
Disconnect();
}, TaskContinuationOptions.OnlyOnFaulted).Forget();
// Send initial blank settings frame
var s = new SettingsFrame();
if (ConnectionSettings.DisablePushPromise)
{
s.EnablePush = false;
}
await QueueFrame(s).ConfigureAwait(false);
}
public async Task Connect ()
{
if (IsConnected ())
return;
tcp = new TcpClient ();
// Disable Nagle for HTTP/2
tcp.NoDelay = true;
await tcp.ConnectAsync (ConnectionSettings.Host, (int)ConnectionSettings.Port);
if (ConnectionSettings.UseTls) {
sslStream = new SslStream (tcp.GetStream (), false,
(sender, certificate, chain, sslPolicyErrors) => true);
await sslStream.AuthenticateAsClientAsync (
ConnectionSettings.Host,
ConnectionSettings.Certificates ?? new X509CertificateCollection (),
System.Security.Authentication.SslProtocols.Tls12,
false);
clientStream = sslStream;
} else {
clientStream = tcp.GetStream ();
}
// Ensure we have a size for the stream '0'
flowControlManager.GetWindowSize (0);
// Send out preface data
var prefaceData = System.Text.Encoding.ASCII.GetBytes (ConnectionPreface);
await clientStream.WriteAsync (prefaceData, 0, prefaceData.Length);
await clientStream.FlushAsync ();
// Start reading the stream on another thread
var readTask = Task.Factory.StartNew (() => {
try { read (); }
catch (Exception ex) {
Log.Debug ("Read error: " + ex);
Disconnect ();
}
}, TaskCreationOptions.LongRunning);
readTask.ContinueWith (t => {
// TODO: Handle the error
Disconnect ();
}, TaskContinuationOptions.OnlyOnFaulted);
// Start a thread to handle writing queued frames to the stream
var writeTask = Task.Factory.StartNew (write, TaskCreationOptions.LongRunning);
writeTask.ContinueWith (t => {
// TODO: Handle the error
Disconnect ();
}, TaskContinuationOptions.OnlyOnFaulted);
// Send initial blank settings frame
var s = new SettingsFrame ();
if (ConnectionSettings.DisablePushPromise)
s.EnablePush = false;
await QueueFrame (s);
}
async void read ()
{
int rx = 0;
byte[] b = new byte[4096];
while (true) {
try {
rx = await clientStream.ReadAsync(b, 0, b.Length);
} catch {
rx = -1;
}
if (rx > 0) {
Console.WriteLine ("RX: {0} bytes", rx);
for (int i = 0; i < rx; i++)
buffer.Add (b [i]);
while (true)
{
// We need at least 9 bytes to process the frame
// 9 octets is the frame header length
if (buffer.Count < 9)
break;
// Find out the frame length
// which is a 24 bit uint, so we need to convert this as c# uint is 32 bit
var flen = new byte[4];
flen [0] = 0x0;
flen [1] = buffer.ElementAt (0);
flen [2] = buffer.ElementAt (1);
flen [3] = buffer.ElementAt (2);
var frameLength = BitConverter.ToUInt32 (flen.EnsureBigEndian (), 0);
// If we are expecting a payload that's bigger than what's in our buffer
// we should keep reading from the stream
if (buffer.Count - 9 < frameLength)
break;
// If we made it this far, the buffer has all the data we need, let's get it out to process
var data = buffer.GetRange (0, (int)frameLength + 9).ToArray ();
// remove the processed info from the buffer
buffer.RemoveRange (0, (int)frameLength + 9);
// Get the Frame Type so we can instantiate the right subclass
var frameType = data [3]; // 4th byte in frame header is TYPE
// Don't need the flags yet
//var frameFlags = data [4]; // 5th byte is FLAGS
// we need to turn the stream id into a uint
var frameStreamIdData = new byte[4];
Array.Copy (data, 5, frameStreamIdData, 0, 4);
uint frameStreamId = Util.ConvertFromUInt31 (frameStreamIdData.EnsureBigEndian ());
Frame frame = null;
var ft = (FrameType)frameType;
switch (ft) {
case FrameType.Data:
frame = new DataFrame ();
break;
case FrameType.Headers:
frame = new HeadersFrame ();
break;
case FrameType.Priority:
frame = new PriorityFrame ();
break;
case FrameType.RstStream:
frame = new RstStreamFrame ();
break;
case FrameType.Settings:
frame = new SettingsFrame ();
break;
case FrameType.PushPromise:
frame = new PushPromiseFrame ();
break;
case FrameType.Ping:
frame = new PingFrame ();
break;
case FrameType.GoAway:
frame = new GoAwayFrame ();
break;
case FrameType.WindowUpdate:
frame = new WindowUpdateFrame ();
break;
case FrameType.Continuation:
frame = new ContinuationFrame ();
break;
}
try {
// Call the specific subclass implementation to parse
if (frame != null)
frame.Parse (data);
} catch (Exception ex) {
Console.WriteLine ("Parsing Frame Failed: " + ex);
throw ex;
}
// If we are waiting on the connection preface from server
// and it's the right frame type, set our resetevent
if (ft == FrameType.Settings
&& resetEventConnectionSettingsFrame != null
&& !resetEventConnectionSettingsFrame.IsSet) {
var settingsFrame = frame as SettingsFrame;
// ack the settings from the server
settingsFrame.Ack = true;
await SendFrame (settingsFrame);
resetEventConnectionSettingsFrame.Set ();
}
try {
if (frameStreamId == 0) {
foreach (var s in Streams) {
if (s.Value.State != StreamState.Closed)
s.Value.ProcessFrame(frame);
}
} else {
var stream = await GetStream(frameStreamId);
stream.ProcessFrame(frame);
}
} catch (Exception ex) {
Console.WriteLine ("Error Processing Frame: " + ex);
throw ex;
}
}
} else {
// TODO: Connection error
//throw new Exception ("Connection Error");
break;
}
}
Disconnect();
}
