/// <summary>
/// Connects to specified url.
/// Url can be like;
/// ws://10.20.30.40
/// wss://10.20.30.40/path
/// hmqs://domain.com
/// hmq://domain.com:154/path
/// </summary>
public async Task ConnectAsync(string uri)
{
DnsResolver resolver = new DnsResolver();
DnsInfo info = resolver.Resolve(uri);
await ConnectAsync(info);
}
/// <summary>
/// Connects to specified url.
/// Url can be like;
/// ws://10.20.30.40
/// wss://10.20.30.40/path
/// hmqs://domain.com
/// hmq://domain.com:154/path
/// </summary>
public void Connect(string uri)
{
DnsResolver resolver = new DnsResolver();
DnsInfo info = resolver.Resolve(uri);
Connect(info);
}
/// <summary>
/// Connects to an IP address on specified port.
/// If secure is true, connects with SSL
/// </summary>
public async Task ConnectAsync(string ip, int port, bool secure)
{
DnsInfo info = new DnsInfo
{
IPAddress = ip,
Hostname = ip,
Port = port,
Path = "/",
Protocol = Protocol.WebSocket,
SSL = secure
};
IsSsl = secure;
await ConnectAsync(info);
}
/// <summary>
/// Connects to an IP address on specified port.
/// If secure is true, connects with SSL
/// </summary>
public void Connect(string ip, int port, bool secure)
{
DnsInfo info = new DnsInfo
{
IPAddress = ip,
Hostname = ip,
Port = port,
Path = "/",
Protocol = Protocol.WebSocket,
SSL = secure
};
IsSsl = secure;
Connect(info);
}
/// <summary> /// Connects to the server /// </summary> public abstract Task ConnectAsync(DnsInfo host);
/// <summary> /// Connects to the server /// </summary> public abstract void Connect(DnsInfo host);
/// <summary>
/// Resolves DnsInfo class from and url
/// </summary>
public DnsInfo Resolve(string url)
{
DnsInfo info = new DnsInfo();
//checks if protocol specified and finds end of the protocol index
int protocol_index = url.IndexOf("//", StringComparison.Ordinal);
//checks if path of the domain if specified
bool hasPath = url.LastIndexOf('/') > url.IndexOf("//", StringComparison.Ordinal) + 2;
//host search helps to find "domain.com" value of full url and removes protocol, path, port strings from the url
//while removing this strings, they will also set to result
//remove protocol from host search
var host_search = protocol_index > 0 ? url.Substring(protocol_index + 2) : url;
//if path specified set it to result and remove path from the host search
if (hasPath)
{
info.Path = host_search.Substring(host_search.IndexOf('/'));
host_search = host_search.Substring(0, host_search.IndexOf('/'));
}
else
{
info.Path = "/";
}
//now host has only domain and port info (if exists)
int specified_port = 0;
//if port specified, find and set it to result and remove from host search
int port_index = host_search.IndexOf(':');
if (port_index > 0)
{
specified_port = Convert.ToInt32(host_search.Split(':')[1].Trim());
host_search = host_search.Substring(0, port_index);
}
//check if host is ip address or domain name
bool byIP = host_search.Split('.').Length == 4;
info.Hostname = host_search;
if (byIP)
{
info.IPAddress = host_search;
}
else
{
//if the host is domain name, find the remote ip address of the domain
IPHostEntry hostEntry = Dns.GetHostEntry(host_search);
string ip = hostEntry.AddressList[0].ToString();
if (ip.Length < 5 && hostEntry.AddressList.Length > 1)
{
ip = hostEntry.AddressList[1].ToString();
}
info.IPAddress = ip;
}
//set the protocol and ssl information by protocol
if (protocol_index > 0)
{
string protocol = url.Substring(0, protocol_index).ToLower().Replace(":", "");
switch (protocol)
{
case "http":
info.Protocol = Protocol.Http;
info.SSL = false;
break;
case "https":
info.Protocol = Protocol.Http;
info.SSL = true;
break;
case "ws":
info.Protocol = Protocol.WebSocket;
info.SSL = false;
break;
case "wss":
info.Protocol = Protocol.WebSocket;
info.SSL = true;
break;
case "hmq":
info.Protocol = Protocol.Hmq;
info.SSL = false;
break;
case "hmqs":
info.Protocol = Protocol.Hmq;
info.SSL = true;
break;
}
}
//set the port if specified as specified port, otherwise find the port from protocol
if (specified_port > 0)
{
info.Port = specified_port;
}
else
{
info.Port = info.SSL ? 443 : 80;
}
return(info);
}