URL Posting and NSLOOKUP

[Rajkumar Sathiya]

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My application is posting a xml string to external Server(i refer it as cleint hereafter).
We are doing URL posting not IP based, means never bother about which IP the URL points to.
Often we are getting Connection Timed Out Exception
When we informed this to the support team in client, they asked us to switch over to other IP
I don't know how to implement this, since we always provide the domain name while opening a connection.
Below is the code which I use.

 
public String sendUrl(String inputData,String urlString){
		String response = "";
		Integer responseCode=0;
		try{
			logger.info("URL : " + urlString);
		  URL url = new URL(urlString);
		  HostnameVerifier hv = new HostnameVerifier() {
			public boolean verify(String arg0, String arg1) {
				return true;
			}
          };
          HttpsURLConnectionOldImpl.setDefaultHostnameVerifier(hv);
          HttpsURLConnectionOldImpl con = (HttpsURLConnectionOldImpl)url.openConnection();
          con.setRequestMethod("GET");
          con.setReadTimeout(60000);
          con.setDoInput ( true );
          con.setDoOutput ( true );
          con.setUseCaches ( false );
          OutputStream out = con.getOutputStream();
          out.write(inputData.getBytes());
          out.flush();
          responseCode= con.getResponseCode();
          response=responseCode.toString();
          logger.info("responseCode::::"+con.getResponseCode());
          InputStream in  = con.getInputStream();
          int i = 0;
          while((i=in.read())!=-1){
        	  response += (char) i; 
          }
          in.close();
          out.close();
		}catch (Exception e) {
				logger.info("Exception while posting string");
			}
		
		return response;
	}
 

How it is possible to change the IP, when am using domain name to create a connection?

I used nslookup from command prompt, it sure provides 2 IP's for the same domain.
Kindly help me. Thanks.
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[Chinna Eranna]

Rajkumar Sathiya wrote:
How it is possible to change the IP, when am using domain name to create a connection?

Just replace the domain name with the ip in the url.

You your client is using redundancy, it is possible that there are two ip's to the same domain.
In that case you can use any one ip.

[Rajkumar Sathiya]

Thanks for your response.
But, if I use IP instead of domain name, will client authentication work?

[Chinna Eranna]

It should work.. because.. your HostNameVerifier is always returning true.

[Ulf Dittmer]

I used nslookup from command prompt, it sure provides 2 IP's for the same domain.

This sounds odd. While there can be multiple host names that resolve to the same IP address, any particular host name can not resolve to more than one IP address (the DNS "A" record). Are you sure that you have the correct host name?

You could also use a library like DNSJava to look up all records for a given host name, and decide how to proceed based on that information.