从字符串创建IPEndpoint的最佳方法

Question

由于IPEndpoint包含一个ToString()输出的方法:

10.10.10.10:1010

还应该有Parse()和/或TryParse()方法,但没有.

我可以拆分字符串:并解析IP地址和端口.

但是有更优雅的方式吗？

Answer 1

这是一个解决方案......

public static IPEndPoint CreateIPEndPoint(string endPoint)
{
    string[] ep = endPoint.Split(':');
    if(ep.Length != 2) throw new FormatException("Invalid endpoint format");
    IPAddress ip;
    if(!IPAddress.TryParse(ep[0], out ip))
    {
        throw new FormatException("Invalid ip-adress");
    }
    int port;
    if(!int.TryParse(ep[1], NumberStyles.None, NumberFormatInfo.CurrentInfo, out port))
    {
        throw new FormatException("Invalid port");
    }
    return new IPEndPoint(ip, port);
}

编辑:添加了一个处理IPv4和IPv6的版本,前一个版本只处理IPv4.

// Handles IPv4 and IPv6 notation.
public static IPEndPoint CreateIPEndPoint(string endPoint)
{
    string[] ep = endPoint.Split(':');
    if (ep.Length < 2) throw new FormatException("Invalid endpoint format");
    IPAddress ip;
    if (ep.Length > 2)
    {
        if (!IPAddress.TryParse(string.Join(":", ep, 0, ep.Length - 1), out ip))
        {
            throw new FormatException("Invalid ip-adress");
        }
    }
    else
    {
        if (!IPAddress.TryParse(ep[0], out ip))
        {
            throw new FormatException("Invalid ip-adress");
        }
    }
    int port;
    if (!int.TryParse(ep[ep.Length - 1], NumberStyles.None, NumberFormatInfo.CurrentInfo, out port))
    {
        throw new FormatException("Invalid port");
    }
    return new IPEndPoint(ip, port);
}

Answer 2

我有要求使用IPv6,v4和主机名解析IPEndpoint.我写的解决方案如下:

    public static IPEndPoint Parse(string endpointstring)
    {
        return Parse(endpointstring, -1);
    }

    public static IPEndPoint Parse(string endpointstring, int defaultport)
    {
        if (string.IsNullOrEmpty(endpointstring)
            || endpointstring.Trim().Length == 0)
        {
            throw new ArgumentException("Endpoint descriptor may not be empty.");
        }

        if (defaultport != -1 &&
            (defaultport < IPEndPoint.MinPort
            || defaultport > IPEndPoint.MaxPort))
        {
            throw new ArgumentException(string.Format("Invalid default port '{0}'", defaultport));
        }

        string[] values = endpointstring.Split(new char[] { ':' });
        IPAddress ipaddy;
        int port = -1;

        //check if we have an IPv6 or ports
        if (values.Length <= 2) // ipv4 or hostname
        {
            if (values.Length == 1)
                //no port is specified, default
                port = defaultport;
            else
                port = getPort(values[1]);

            //try to use the address as IPv4, otherwise get hostname
            if (!IPAddress.TryParse(values[0], out ipaddy))
                ipaddy = getIPfromHost(values[0]);
        }
        else if (values.Length > 2) //ipv6
        {
            //could [a:b:c]:d
            if (values[0].StartsWith("[") && values[values.Length - 2].EndsWith("]"))
            {
                string ipaddressstring = string.Join(":", values.Take(values.Length - 1).ToArray());
                ipaddy = IPAddress.Parse(ipaddressstring);
                port = getPort(values[values.Length - 1]);
            }
            else //[a:b:c] or a:b:c
            {
                ipaddy = IPAddress.Parse(endpointstring);
                port = defaultport;
            }
        }
        else
        {
            throw new FormatException(string.Format("Invalid endpoint ipaddress '{0}'", endpointstring));
        }

        if (port == -1)
            throw new ArgumentException(string.Format("No port specified: '{0}'", endpointstring));

        return new IPEndPoint(ipaddy, port);
    }

    private static int getPort(string p)
    {
        int port;

        if (!int.TryParse(p, out port)
         || port < IPEndPoint.MinPort
         || port > IPEndPoint.MaxPort)
        {
            throw new FormatException(string.Format("Invalid end point port '{0}'", p));
        }

        return port;
    }

    private static IPAddress getIPfromHost(string p)
    {
        var hosts = Dns.GetHostAddresses(p);

        if (hosts == null || hosts.Length == 0)
            throw new ArgumentException(string.Format("Host not found: {0}", p));

        return hosts[0];
    }

已经过测试,可以使用以下示例:

• 0.0.0.0:100
• 0.0.0.0
• [:: 1]:100
• [:: 1]
• :: 1
• [A B C D]
• [A:B:C:d]:100
• example.org
• example.org:100

Answer 3

看起来已经有一个内置的Parse方法来处理ip4和ip6地址 http://msdn.microsoft.com/en-us/library/system.net.ipaddress.parse%28v=vs.110%29.aspx

// serverIP can be in ip4 or ip6 format
string serverIP = "192.168.0.1";
string port = 8000;
IPEndPoint remoteEP = new IPEndPoint(IPAddress.Parse(serverIP), port);

Answer 4

显然，IPEndPoint.Parse并IPEndPoint.TryParse 已添加到 .NET Core 3.0 中。

如果您的目标是它，请尝试使用这些方法！实现见上面的链接。

Answer 5

这是我将文本解析为的版本IPEndPoint：

private static IPEndPoint ParseIPEndPoint(string text)
{
    Uri uri;
    if (Uri.TryCreate(text, UriKind.Absolute, out uri))
        return new IPEndPoint(IPAddress.Parse(uri.Host), uri.Port < 0 ? 0 : uri.Port);
    if (Uri.TryCreate(String.Concat("tcp://", text), UriKind.Absolute, out uri))
        return new IPEndPoint(IPAddress.Parse(uri.Host), uri.Port < 0 ? 0 : uri.Port);
    if (Uri.TryCreate(String.Concat("tcp://", String.Concat("[", text, "]")), UriKind.Absolute, out uri))
        return new IPEndPoint(IPAddress.Parse(uri.Host), uri.Port < 0 ? 0 : uri.Port);
    throw new FormatException("Failed to parse text to IPEndPoint");
}

经过测试：

• 0.0.0.0
• 0.0.0.0:100
• [:: 1]：100
• [:: 1]：0
• :: 1
• [2001：db8：85a3：8d3：1319：8a2e：370：7348]
• [2001：db8：85a3：8d3：1319：8a2e：370：7348]：100
• http://0.0.0.0
• http://0.0.0.0:100
• http：// [:: 1]
• http：// [:: 1]：100
• https://0.0.0.0
• https：// [:: 1]