TrackingContext GetTrackingContext()
{
var queryParameters = HybridConnectionUtility.ParseQueryString(this.rendezvousAddress.Query);
string trackingId = queryParameters[HybridConnectionConstants.Id];
return(TrackingContext.Create(trackingId, this.rendezvousAddress));
}
/// <summary>
/// Establishes a new send-side HybridConnection and returns the Stream.
/// </summary>
public async Task <HybridConnectionStream> CreateConnectionAsync()
{
TrackingContext trackingContext = CreateTrackingContext(this.Address);
string traceSource = nameof(HybridConnectionClient) + "(" + trackingContext.ToString() + ")";
var timeoutHelper = new TimeoutHelper(this.OperationTimeout);
RelayEventSource.Log.RelayClientConnectStart(traceSource);
try
{
var webSocket = new ClientWebSocket();
webSocket.Options.Proxy = this.Proxy;
webSocket.Options.KeepAliveInterval = HybridConnectionConstants.KeepAliveInterval;
webSocket.Options.SetBuffer(this.ConnectionBufferSize, this.ConnectionBufferSize);
if (this.TokenProvider != null)
{
RelayEventSource.Log.GetTokenStart(traceSource);
string audience = this.Address.GetComponents(UriComponents.SchemeAndServer | UriComponents.Path, UriFormat.UriEscaped);
var token = await this.TokenProvider.GetTokenAsync(audience, TokenProvider.DefaultTokenTimeout).ConfigureAwait(false);
RelayEventSource.Log.GetTokenStop(token.ExpiresAtUtc);
webSocket.Options.SetRequestHeader(RelayConstants.ServiceBusAuthorizationHeaderName, token.TokenString);
}
// Build the websocket uri, e.g. "wss://contoso.servicebus.windows.net:443/$hc/endpoint1?sb-hc-action=connect&sb-hc-id=E2E_TRACKING_ID"
Uri webSocketUri = HybridConnectionUtility.BuildUri(
this.Address.Host,
this.Address.Port,
this.Address.AbsolutePath,
this.Address.Query,
HybridConnectionConstants.Actions.Connect,
trackingContext.TrackingId);
using (var cancelSource = new CancellationTokenSource(timeoutHelper.RemainingTime()))
{
await webSocket.ConnectAsync(webSocketUri, cancelSource.Token).ConfigureAwait(false);
}
#if NET45 // TODO: Flow Response Headers in NETSTANDARD ClientWebSocket
var trackingId = webSocket.ResponseHeaders[TrackingContext.TrackingIdName];
if (!string.IsNullOrEmpty(trackingId))
{
// Update to the flown trackingId (which has _GX suffix)
trackingContext = TrackingContext.Create(trackingId, trackingContext.SubsystemId);
traceSource = nameof(HybridConnectionClient) + "(" + trackingContext.ToString() + ")";
}
#endif
return(new WebSocketStream(webSocket, trackingContext));
}
catch (WebSocketException wsException)
{
throw RelayEventSource.Log.ThrowingException(WebSocketExceptionHelper.ConvertToRelayContract(wsException), traceSource);
}
finally
{
RelayEventSource.Log.RelayClientConnectStop();
}
}
/// <summary>
/// Establishes a new send-side HybridConnection and returns the Stream.
/// </summary>
public async Task <HybridConnectionStream> CreateConnectionAsync(IDictionary <string, string> requestHeaders)
{
TrackingContext trackingContext = CreateTrackingContext(this.Address);
string traceSource = nameof(HybridConnectionClient) + "(" + trackingContext + ")";
// todo - Check if timeout helper needs to be started here.
var timeoutHelper = TimeoutHelper.CreateOnly(this.OperationTimeout);
RelayEventSource.Log.ObjectConnecting(traceSource, trackingContext);
var webSocket = this.ClientWebSocketFactory.Create();
try
{
DefaultWebProxy.ConfigureProxy(webSocket.Options, this.Proxy);
webSocket.Options.KeepAliveInterval = this.KeepAliveInterval;
webSocket.Options.SetBuffer(this.ConnectionBufferSize, this.ConnectionBufferSize);
webSocket.Options.SetRequestHeader(HybridConnectionConstants.Headers.RelayUserAgent, HybridConnectionConstants.ClientAgent);
if (this.TokenProvider != null)
{
RelayEventSource.Log.GetTokenStart(traceSource);
string audience = this.Address.GetComponents(UriComponents.SchemeAndServer | UriComponents.Path, UriFormat.UriEscaped);
var token = await this.TokenProvider.GetTokenAsync(audience, TokenProvider.DefaultTokenTimeout).ConfigureAwait(false);
RelayEventSource.Log.GetTokenStop(traceSource, token.ExpiresAtUtc);
webSocket.Options.SetRequestHeader(RelayConstants.ServiceBusAuthorizationHeaderName, token.TokenString);
}
if (requestHeaders != null)
{
foreach (KeyValuePair <string, string> header in requestHeaders)
{
webSocket.Options.SetRequestHeader(header.Key, header.Value);
}
}
// Build the websocket uri, e.g. "wss://contoso.servicebus.windows.net:443/$hc/endpoint1?sb-hc-action=connect&sb-hc-id=E2E_TRACKING_ID"
Uri webSocketUri = HybridConnectionUtility.BuildUri(
this.Address.Host,
this.Address.Port,
this.Address.AbsolutePath,
this.Address.Query,
HybridConnectionConstants.Actions.Connect,
trackingContext.TrackingId);
using (var cancelSource = new CancellationTokenSource(timeoutHelper.RemainingTime()))
{
await webSocket.ConnectAsync(webSocketUri, cancelSource.Token).ConfigureAwait(false);
}
RelayEventSource.Log.ObjectConnected(traceSource, trackingContext);
return(new WebSocketStream(webSocket.WebSocket, trackingContext));
}
catch (Exception exception) when(!WebSocketExceptionHelper.IsRelayContract(exception))
{
throw RelayEventSource.Log.ThrowingException(
WebSocketExceptionHelper.ConvertToRelayContract(exception, trackingContext, webSocket.Response, isListener: false),
traceSource);
}
}
async Task <WebSocket> ConnectAsync(CancellationToken cancellationToken)
{
Fx.Assert(!this.closeCalled, "Shouldn't call ConnectWebSocketAsync if CloseAsync was called.");
try
{
var connectDelay = ConnectDelayIntervals[this.connectDelayIndex];
if (connectDelay != TimeSpan.Zero)
{
await Task.Delay(connectDelay, cancellationToken).ConfigureAwait(false);
}
RelayEventSource.Log.RelayClientConnectStart(this.listener);
var webSocket = new ClientWebSocket();
webSocket.Options.SetBuffer(this.bufferSize, this.bufferSize);
webSocket.Options.Proxy = this.listener.Proxy;
webSocket.Options.KeepAliveInterval = HybridConnectionConstants.KeepAliveInterval;
webSocket.Options.SetRequestHeader("User-Agent", "ServiceBus/" + ClientAgentFileVersion);
var token = await this.tokenRenewer.GetTokenAsync().ConfigureAwait(false);
webSocket.Options.SetRequestHeader(RelayConstants.ServiceBusAuthorizationHeaderName, token.TokenString);
// When we reconnect we need to remove the "_GXX" suffix otherwise trackingId gets longer after each reconnect
string trackingId = TrackingContext.RemoveSuffix(this.listener.TrackingContext.TrackingId);
// Build the websocket uri, e.g. "wss://contoso.servicebus.windows.net:443/$hc/endpoint1?sb-hc-action=listen&sb-hc-id=E2E_TRACKING_ID"
var webSocketUri = HybridConnectionUtility.BuildUri(
this.address.Host,
this.address.Port,
this.address.AbsolutePath,
this.address.Query,
HybridConnectionConstants.Actions.Listen,
trackingId);
await webSocket.ConnectAsync(webSocketUri, cancellationToken).ConfigureAwait(false);
#if NET45 // TODO: Flow Response Headers in NETSTANDARD ClientWebSocket
trackingId = webSocket.ResponseHeaders[TrackingContext.TrackingIdName];
if (!string.IsNullOrEmpty(trackingId))
{
// Update to the flown trackingId (which has _GX suffix)
this.listener.TrackingContext = TrackingContext.Create(trackingId, this.listener.TrackingContext.SubsystemId);
}
#endif
this.OnOnline();
return(webSocket);
}
catch (WebSocketException wsException)
{
throw RelayEventSource.Log.ThrowingException(WebSocketExceptionHelper.ConvertToRelayContract(wsException), this.listener);
}
finally
{
RelayEventSource.Log.RelayClientConnectStop();
}
}
/// <summary>
/// Form the logical request Uri using the scheme://host:port from the listener and the path from the acceptCommand (minus "/$hc")
/// e.g. sb://contoso.servicebus.windows.net/hybrid1?foo=bar
/// </summary>
Uri GenerateAcceptRequestUri(Uri rendezvousUri)
{
var requestUri = new UriBuilder(this.Address);
requestUri.Query = HybridConnectionUtility.FilterQueryString(rendezvousUri.Query);
requestUri.Path = rendezvousUri.GetComponents(UriComponents.Path, UriFormat.Unescaped);
if (requestUri.Path.StartsWith("$hc/", StringComparison.Ordinal))
{
requestUri.Path = requestUri.Path.Substring(4);
}
return(requestUri.Uri);
}
async Task <WebSocket> ConnectAsync(CancellationToken cancellationToken)
{
this.listener.ThrowIfDisposed();
var webSocket = ClientWebSocketFactory.Create(this.listener.UseBuiltInClientWebSocket);
try
{
var connectDelay = ConnectDelayIntervals[this.connectDelayIndex];
if (connectDelay != TimeSpan.Zero)
{
await Task.Delay(connectDelay, cancellationToken).ConfigureAwait(false);
}
RelayEventSource.Log.ObjectConnecting(this.listener);
webSocket.Options.SetBuffer(this.bufferSize, this.bufferSize);
DefaultWebProxy.ConfigureProxy(webSocket.Options, this.listener.Proxy);
webSocket.Options.KeepAliveInterval = HybridConnectionConstants.KeepAliveInterval;
webSocket.Options.SetRequestHeader(HybridConnectionConstants.Headers.RelayUserAgent, HybridConnectionConstants.ClientAgent);
var token = await this.tokenRenewer.GetTokenAsync().ConfigureAwait(false);
webSocket.Options.SetRequestHeader(RelayConstants.ServiceBusAuthorizationHeaderName, token.TokenString);
// When we reconnect we need to remove the "_GXX" suffix otherwise trackingId gets longer after each reconnect
string trackingId = TrackingContext.RemoveSuffix(this.listener.TrackingContext.TrackingId);
// Build the websocket uri, e.g. "wss://contoso.servicebus.windows.net:443/$hc/endpoint1?sb-hc-action=listen&sb-hc-id=E2E_TRACKING_ID"
var webSocketUri = HybridConnectionUtility.BuildUri(
this.address.Host,
this.address.Port,
this.address.AbsolutePath,
this.address.Query,
HybridConnectionConstants.Actions.Listen,
trackingId);
await webSocket.ConnectAsync(webSocketUri, cancellationToken).ConfigureAwait(false);
this.OnOnline();
RelayEventSource.Log.ObjectConnected(this.listener);
return(webSocket.WebSocket);
}
catch (Exception exception) when(!WebSocketExceptionHelper.IsRelayContract(exception))
{
throw RelayEventSource.Log.ThrowingException(
WebSocketExceptionHelper.ConvertToRelayContract(exception, this.listener.TrackingContext, webSocket.Response), this.listener);
}
}
TrackingContext GetTrackingContext()
{
var queryParameters = HybridConnectionUtility.ParseQueryString(this.rendezvousAddress.Query);
string trackingId = queryParameters[HybridConnectionConstants.Id];
string path = this.rendezvousAddress.LocalPath;
if (path.StartsWith(HybridConnectionConstants.HybridConnectionRequestUri, StringComparison.OrdinalIgnoreCase))
{
path = path.Substring(HybridConnectionConstants.HybridConnectionRequestUri.Length);
}
Uri logicalAddress = new UriBuilder()
{
Scheme = Uri.UriSchemeHttps,
Host = this.listener.Address.Host,
Path = path,
}.Uri;
return(TrackingContext.Create(trackingId, logicalAddress));
}
