post url connection not working

[sai sudhakar]

I am providing the below given code. it is working well for POST TYPE=GET but not working for POST:: i need some help

public class URLChecking {

	public static String excutePost(String targetURL, String urlParameters) {
		URL url;
		HttpURLConnection connection = null;
		try {
			// Create connection
			url = new URL(targetURL);
			System.out.println(url.getQuery());			
			connection = (HttpURLConnection) url.openConnection();
			connection.setRequestMethod("POST");
			connection.setRequestProperty("Content-type","application/atom+xml");
			connection.setRequestProperty("User-Agent","Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13 (.NET CLR 3.5.30729)");
		//	connection.setRequestProperty("Accept","text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
			connection.setRequestProperty("Content-Language", "en-US");
		//	connection.setRequestProperty("Accept-Encoding", "gzip,deflate");
		//	connection.setRequestProperty("Accept-Charset","ISO-8859-1,utf-8;q=0.7,*;q=0.7");
			connection.setRequestProperty("Keep-Alive", "115");
		//	connection.setRequestProperty("Connection", "keep-alive");
			connection.setUseCaches(false);
			/*connection.setRequestProperty("Content-Length", "" + 
		               Integer.toString(urlParameters.getBytes().length));*/
			connection.setDoInput(true);
			connection.setDoOutput(true);

			System.out.println("urlParameters is:"+urlParameters);
			System.out.println("Test ????:"+url.getQuery());	
			 DataOutputStream wr = new DataOutputStream (
	                  connection.getOutputStream ());
	      wr.writeBytes (urlParameters);
	      wr.flush ();
	      wr.close ();
			// Get Response
	      
			InputStream is = connection.getInputStream();
			System.out.println("response code"+connection.getResponseCode());
			BufferedReader rd = new BufferedReader(new InputStreamReader(is));
			String line;
			StringBuffer response = new StringBuffer();
			
			while ((line = rd.readLine()) != null) {
			 System.out.println(line);
				response.append(line);
				response.append('\r');
			}

			rd.close();
			return response.toString();
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		} finally {
			if (connection != null) {
				connection.disconnect();
			}
		}
	}

	public static void main(String[] args) {
		
		String data="hl=en&oi=spell&q=cairn+india&ie=utf-8&num=10&output=rss";
		try {
			data ="hl="+URLEncoder.encode("en", "UTF-8") + 
			"&oi="+URLEncoder.encode("spell", "UTF-8")+
			"&q="+URLEncoder.encode("cairn+india", "UTF-8")+
			"&ie="+URLEncoder.encode("utf-8", "UTF-8")+
			"&num="+URLEncoder.encode("10", "UTF-8")+
			"&output="+URLEncoder.encode("rss", "UTF-8")
			;
			System.out.println("the data " + data);
		} catch (UnsupportedEncodingException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}
		try {
			excutePost("http://blogsearch.google.com/blogsearch_feeds", data);	
		} catch (Exception e) {
			// TODO: handle exception
			e.printStackTrace();
		}
	}
}

[Greg Charles]

How isn't it working? Is there an error message, bad response code, no response at all? It's possible that the server you're hitting just doesn't respond to POST requests to that URL.

[sai sudhakar]

i am getting a response code as 400 for request type POST

[Rob Spoor]

That means Bad Request. That doesn't mean that POST is not supported; that would trigger a 405 error (Method Not Allowed). So something is wrong with the data you send.

I think this is beyond just I/O so I'll steal ( ) this thread away to our Sockets and Internet Protocols forum.