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using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Text.RegularExpressions;
namespace eMZi.Gaming.Minecraft
{
/// <summary>
/// Represents retrieved Minecraft Server information
/// </summary>
public sealed class MinecraftServerInfo
{
/// <summary>
/// Gets the server's MOTD
/// </summary>
public string ServerMotd { get; private set; }
/// <summary>
/// Gets the server's MOTD converted into HTML
/// </summary>
public string ServerMotdHtml { get { return this.MotdHtml(); } }
/// <summary>
/// Gets the server's max player count
/// </summary>
public int MaxPlayerCount { get; private set; }
/// <summary>
/// Gets the server's current player count
/// </summary>
public int CurrentPlayerCount { get; private set; }
/// <summary>
/// Gets the server's Minecraft version
/// </summary>
public Version MinecraftVersion { get; private set; }
/// <summary>
/// Gets HTML colors associated with specific formatting codes
/// </summary>
private static Dictionary<char, string> MinecraftColors { get { return new Dictionary<char, string>() { { '0', "#000000" }, { '1', "#0000AA" }, { '2', "#00AA00" }, { '3', "#00AAAA" }, { '4', "#AA0000" }, { '5', "#AA00AA" }, { '6', "#FFAA00" }, { '7', "#AAAAAA" }, { '8', "#555555" }, { '9', "#5555FF" }, { 'a', "#55FF55" }, { 'b', "#55FFFF" }, { 'c', "#FF5555" }, { 'd', "#FF55FF" }, { 'e', "#FFFF55" }, { 'f', "#FFFFFF" } }; } }
/// <summary>
/// Gets HTML styles associated with specific formatting codes
/// </summary>
private static Dictionary<char, string> MinecraftStyles { get { return new Dictionary<char, string>() { { 'k', "none;font-weight:normal;font-style:normal" }, { 'm', "line-through;font-weight:normal;font-style:normal" }, { 'l', "none;font-weight:900;font-style:normal" }, { 'n', "underline;font-weight:normal;font-style:normal;" }, { 'o', "none;font-weight:normal;font-style:italic;" }, { 'r', "none;font-weight:normal;font-style:normal;color:#FFFFFF;" } }; } }
/// <summary>
/// Creates a new instance of <see cref="MinecraftServerInfo"/> with specified values
/// </summary>
/// <param name="motd">Server's MOTD</param>
/// <param name="maxplayers">Server's max player count</param>
/// <param name="playercount">Server's current player count</param>
/// <param name="version">Server's Minecraft version</param>
private MinecraftServerInfo(string motd, int maxplayers, int playercount, Version mcversion)
{
this.ServerMotd = motd;
this.MaxPlayerCount = maxplayers;
this.CurrentPlayerCount = playercount;
this.MinecraftVersion = mcversion;
}
/// <summary>
/// Gets the server's MOTD formatted as HTML
/// </summary>
/// <returns>HTML-formatted MOTD</returns>
private string MotdHtml()
{
Regex regex = new Regex("§([k-oK-O])(.*?)(§[0-9a-fA-Fk-oK-OrR]|$)");
string s = this.ServerMotd;
while (regex.IsMatch(s))
s = regex.Replace(s, m =>
{
string ast = "text-decoration:" + MinecraftStyles[m.Groups[1].Value[0]];
string html = "<span style=\"" + ast + "\">" + m.Groups[2].Value + "</span>" + m.Groups[3].Value;
return html;
});
regex = new Regex("§([0-9a-fA-F])(.*?)(§[0-9a-fA-FrR]|$)");
while (regex.IsMatch(s))
s = regex.Replace(s, m =>
{
string ast = "color:" + MinecraftColors[m.Groups[1].Value[0]];
string html = "<span style=\"" + ast + "\">" + m.Groups[2].Value + "</span>" + m.Groups[3].Value;
return html;
});
return s;
}
/// <summary>
/// Gets the information from specified server
/// </summary>
/// <param name="endpoint">IP and Port of the server to get information from</param>
/// <returns>A <see cref="MinecraftServerInformation"/> instance with retrieved data</returns>
/// <exception cref="System.Exception">Upon failure, throws exception with descriptive information and InnerException with details</exception>
public static MinecraftServerInfo GetServerInformation(IPEndPoint endpoint)
{
if (endpoint == null)
throw new ArgumentNullException("endpoint");
try
{
string[] packetdat = null;
using (TcpClient client = new TcpClient())
{
client.Connect(endpoint);
using (NetworkStream ns = client.GetStream())
{
ns.Write(new byte[] { 0xFE, 0x01 }, 0, 2);
byte[] buff = new byte[2048];
int br = ns.Read(buff, 0, buff.Length);
if (buff[0] != 0xFF)
throw new InvalidDataException("Received invalid packet");
string packet = Encoding.BigEndianUnicode.GetString(buff, 3, br - 3);
if (!packet.StartsWith("§"))
throw new InvalidDataException("Received invalid data");
packetdat = packet.Split('\u0000');
ns.Close();
}
client.Close();
}
return new MinecraftServerInfo(packetdat[3], int.Parse(packetdat[5]), int.Parse(packetdat[4]), Version.Parse(packetdat[2]));
}
catch (SocketException ex)
{
throw new Exception("There was a connection problem, look into InnerException for details", ex);
}
catch (InvalidDataException ex)
{
throw new Exception("The data received was invalid, look into InnerException for details", ex);
}
catch (Exception ex)
{
throw new Exception("There was a problem, look into InnerException for details", ex);
}
}
/// <summary>
/// Gets the information from specified server
/// </summary>
/// <param name="ip">IP of the server to get info from</param>
/// <param name="port">Port of the server to get info from</param>
/// <returns>A <see cref="MinecraftServerInformation"/> instance with retrieved data</returns>
/// <exception cref="System.Exception">Upon failure, throws exception with descriptive information and InnerException with details</exception>
public static MinecraftServerInfo GetServerInformation(IPAddress ip, int port)
{
return GetServerInformation(new IPEndPoint(ip, port));
}
}
}
@uNd3r74k3r

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uNd3r74k3r commented Aug 13, 2013

Nice small implementation but I have a few problems with it:

  1. your code won't compile because you can't put readonly on a property (make it a private field because it's not public either way)
    2.you should dispose the TcpClient and the stream.
    3.bad practise to throw a Exception (the base class), throw your own exception instead.
  2. the if statement in lines 78 and 86 will always be true because you check IsMatch before
  3. the names in the xml documentation are wrong in a few cases
@uNd3r74k3r

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uNd3r74k3r commented Aug 13, 2013

oh, and you delcare dat in line 115 but never use it

@Emzi0767

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Owner Author

Emzi0767 commented Sep 3, 2013

Thanks for feedback, I'll edit it.

@iamcsharper

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iamcsharper commented Sep 5, 2014

How to use it?

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