/// <summary>
/// Creates a Web-socket session.
/// </summary>
public override async void CreateSession()
{
try
{
lock (this.queue)
{
this.terminated = false;
this.writing = false;
this.closeSent = false;
this.queue.Clear();
this.webSocketClient?.Dispose();
this.webSocketClient = null;
this.webSocketClient = new ClientWebSocket();
this.webSocketClient.Options.KeepAliveInterval = TimeSpan.FromSeconds(30);
}
await this.webSocketClient.ConnectAsync(this.url, CancellationToken.None);
// TODO: this.xmppClient.TrustServer
if (this.xmppClient.HasSniffers)
{
this.xmppClient.Information("Initiating session.");
}
await this.SendAsync("<?");
string XmlResponse = await this.ReadText();
XmlDocument ResponseXml = new XmlDocument()
{
PreserveWhitespace = true
};
ResponseXml.LoadXml(XmlResponse);
XmlElement Open;
if ((Open = ResponseXml.DocumentElement) is null || Open.LocalName != "open" ||
Open.NamespaceURI != FramingNamespace)
{
throw new Exception("Unexpected response returned.");
}
string StreamPrefix = "stream";
LinkedList <KeyValuePair <string, string> > Namespaces = null;
this.to = null;
this.from = null;
this.version = 0;
this.language = null;
foreach (XmlAttribute Attr in Open.Attributes)
{
switch (Attr.Name)
{
case "version":
if (!CommonTypes.TryParse(Attr.Value, out this.version))
{
throw new Exception("Invalid version number.");
}
break;
case "to":
this.to = Attr.Value;
break;
case "from":
this.from = Attr.Value;
break;
case "xml:lang":
this.language = Attr.Value;
break;
default:
if (Attr.Prefix == "xmlns")
{
if (Attr.Value == XmppClient.NamespaceStream)
{
StreamPrefix = Attr.LocalName;
}
else
{
if (Namespaces is null)
{
Namespaces = new LinkedList <KeyValuePair <string, string> >();
}
Namespaces.AddLast(new KeyValuePair <string, string>(Attr.Prefix, Attr.Value));
}
}
break;
}
}
StringBuilder sb = new StringBuilder();
sb.Append('<');
sb.Append(StreamPrefix);
sb.Append(":stream xmlns:");
sb.Append(StreamPrefix);
sb.Append("='");
sb.Append(XmppClient.NamespaceStream);
if (!(this.to is null))
{
sb.Append("' to='");
sb.Append(XML.Encode(this.to));
}
if (!(this.from is null))
{
sb.Append("' from='");
sb.Append(XML.Encode(this.from));
}
if (this.version > 0)
{
sb.Append("' version='");
sb.Append(CommonTypes.Encode(this.version));
}
if (!(this.language is null))
{
sb.Append("' xml:lang='");
sb.Append(XML.Encode(this.language));
}
sb.Append("' xmlns='");
sb.Append(XmppClient.NamespaceClient);
if (!(Namespaces is null))
{
foreach (KeyValuePair <string, string> P in Namespaces)
{
sb.Append("' xmlns:");
sb.Append(P.Key);
sb.Append("='");
sb.Append(XML.Encode(P.Value));
}
}
sb.Append("'>");
this.bindingInterface.StreamHeader = sb.ToString();
sb.Clear();
sb.Append("</");
sb.Append(StreamPrefix);
sb.Append(":stream>");
this.bindingInterface.StreamFooter = sb.ToString();
this.StartReading();
}
catch (Exception ex)
{
await this.bindingInterface.ConnectionError(ex);
}
}
private Task <bool> BodyReceived(string Xml, bool First)
{
string Body;
int i, j;
i = Xml.IndexOf("<body");
if (i >= 0)
{
i = Xml.IndexOf('>', i + 5);
if (i > 0)
{
Body = Xml.Substring(0, i + 1);
if (Xml[i - 1] == '/')
{
Xml = null;
}
else
{
Body += "</body>";
j = Xml.LastIndexOf("</body");
if (i < 0)
{
Xml = Xml.Substring(i + 1);
}
else
{
Xml = Xml.Substring(i + 1, j - i - 1).Trim();
}
}
bool Terminate = false;
string Condition = null;
string To = null;
string From = null;
string Version = null;
string Language = null;
string StreamPrefix = "stream";
XmlDocument BodyDoc = new XmlDocument();
LinkedList <KeyValuePair <string, string> > Namespaces = null;
BodyDoc.LoadXml(Body);
foreach (XmlAttribute Attr in BodyDoc.DocumentElement.Attributes)
{
switch (Attr.Name)
{
case "type":
if (Attr.Value == "terminate")
{
Terminate = true;
}
break;
case "condition":
Condition = Attr.Value;
break;
case "xml:lang":
Language = Attr.Value;
break;
default:
if (Attr.Prefix == "xmlns")
{
if (Attr.Value == XmppClient.NamespaceStream)
{
StreamPrefix = Attr.LocalName;
}
else
{
if (Namespaces is null)
{
Namespaces = new LinkedList <KeyValuePair <string, string> >();
}
Namespaces.AddLast(new KeyValuePair <string, string>(Attr.Prefix, Attr.Value));
}
}
else if (Attr.LocalName == "version" && Attr.NamespaceURI == BoshNamespace)
{
Version = Attr.Value;
}
break;
}
}
if (Terminate)
{
this.terminated = true;
lock (this.httpClients)
{
this.outputQueue.Clear();
}
throw new Exception("Session terminated. Condition: " + Condition);
}
if (First)
{
StringBuilder sb = new StringBuilder();
sb.Append('<');
sb.Append(StreamPrefix);
sb.Append(":stream xmlns:");
sb.Append(StreamPrefix);
sb.Append("='");
sb.Append(XmppClient.NamespaceStream);
if (To != null)
{
sb.Append("' to='");
sb.Append(XML.Encode(To));
}
if (From != null)
{
sb.Append("' from='");
sb.Append(XML.Encode(From));
}
if (Version != null)
{
sb.Append("' version='");
sb.Append(XML.Encode(Version));
}
if (Language != null)
{
sb.Append("' xml:lang='");
sb.Append(XML.Encode(Language));
}
sb.Append("' xmlns='");
sb.Append(XmppClient.NamespaceClient);
if (Namespaces != null)
{
foreach (KeyValuePair <string, string> P in Namespaces)
{
sb.Append("' xmlns:");
sb.Append(P.Key);
sb.Append("='");
sb.Append(XML.Encode(P.Value));
}
}
sb.Append("'>");
this.bindingInterface.StreamHeader = sb.ToString();
sb.Clear();
sb.Append("</");
sb.Append(StreamPrefix);
sb.Append(":stream>");
this.bindingInterface.StreamFooter = sb.ToString();
}
}
}
if (Xml != null)
{
return(this.RaiseOnReceived(Xml));
}
else
{
return(Task.FromResult <bool>(true));
}
}