import java.net.*;

class LocalServer
{
  private final String mPathIPFileName=new String("ip");
	private final String mStrID=new String("[IP]");
	private final int mMinLength=mStrID.length();

  public LocalServer()
	{
	}
  public String getServerIP(String strHostPathFileName)throws Exception
	{
	  return getServerIP(new InFile(strHostPathFileName,mPathIPFileName));
	}
  public String getServerIP(URL resBase)throws Exception
	{
	  return getServerIP(new InFile(resBase,mPathIPFileName));
	}
  private String getServerIP(InFile inFile)throws Exception
	{
		String strHost;
		String strLine;
		int strLen;

		strLine=new String();
		strHost=new String();
		while(true)
		{
		  try{strLine=inFile.readLine();}
			catch(Exception exception){return strHost;}
			strLen=strLine.length();
			if(strLen<mMinLength)continue;
			if(0==strLine.substring(0,mMinLength).compareTo(mStrID))
			{
			  strHost=strLine.substring(mMinLength+1,strLen-1);
				return strHost;
			}
		}
	}
};