Getting the webserver IP

Question

Does anyone know if there is a way to get the webserver's IP address in java. Kind of like a System.getProperty()?

Answer 1

Here is a method that I wrote for my FileIO demo applet, it can be used to find the local host name and IP address, the applet server's host name and IP address, as well as the host name of any webserver given an IP address or vice versa. The parameter for the method is of one of the following
forms:
1) local name
2) local ip
3) remote name
4) remote ip
5) 64.58.76.227
6) http://www.yahoo.com
   public String aok_Host(String sFlag) {
      sFlag=sFlag.toLowerCase();
      int getName=sFlag.indexOf("name");
      String HName="";
      String HAddr="";
      Socket socket;
      InetAddress addr;
      try {
         if (sFlag.toLowerCase().indexOf("local")>=0) {  // find local host name and address
            socket=new Socket("java.sun.com",80);
            addr=socket.getLocalAddress();
            HName=addr.getHostName();
            HAddr=addr.getHostAddress();
         } if (sFlag.toLowerCase().indexOf("remote")>=0) {  // find applet server's host name and address
            HName=getCodeBase().getHost();
            HAddr=InetAddress.getByName(HName).toString();
            int i=HAddr.indexOf("/");
            if (i>0) {
               HName=HAddr.substring(0,i);
               HAddr=HAddr.substring(i+1);
         } else {    // return host name give IP address or vice versa
            if (sFlag.startsWith("http")) {
               int i=sFlag.indexOf("/")+2;
               socket=new Socket(sFlag.substring(i),80);
               addr=socket.getInetAddress();
               return addr.getHostAddress();
            socket=new Socket(sFlag,80);
            addr=socket.getInetAddress();
            return addr.getHostName();
      } catch (Throwable e) {}
      if (getName>=0) return HName;
      return HAddr;
   }V.V.