how to POST data to server using HttpURLConnection ??

[dhana]

Hi friends,

I have a problem to send a data using HttpURLConnection* can any one help me how to post a data.

[Norm]

Can you post your code and explain what it is doing and why that is wrong?

[dhana]

Hi, i need to write HttpClient and HttpServer like a TCPClient and server
server wants to listen a given port and IP and client post data to the server using HttpConnection, then server receives client data and show in a console.

[dhana]

HttpServer*************************
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.concurrent.Executors;
import com.sun.net.httpserver.Headers;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;

public class Httpserver implements HttpHandler {
public static void main(String[] args) {
try {
InetSocketAddress addr = new InetSocketAddress(8080);
System.out.println("InetSocketAddress " + addr);
HttpServer server = HttpServer.create(addr, 0);
System.out.println("HttpServer " + server);
server.createContext("/", new Httpserver());
System.out.println("Server creating context ");
server.setExecutor(Executors.newCachedThreadPool() );
server.start();
System.out.println("Server is listening on port 8080");

} catch (Exception e) {
e.printStackTrace();
}
}

public void handle(HttpExchange exchange) throws IOException {
// TODO Auto-generated method stub

System.out.println("MyHandler ");
String requestMethod = exchange.getRequestMethod();
if (requestMethod.equalsIgnoreCase("POST")) {
Headers responseHeaders = exchange.getResponseHeaders();
System.out.println("Get Response Headers "+responseHeaders);
responseHeaders.set("Content-Type", "text/plain");
exchange.sendResponseHeaders(200, 0);

OutputStream responseBody = exchange.getResponseBody();
System.out.println("Outputstream response body "+responseBody);
Headers requestHeaders = exchange.getRequestHeaders();
Set<String> keySet = requestHeaders.keySet();
System.out.println("Set value "+keySet);
Iterator<String> iter = keySet.iterator();
while (iter.hasNext()) {
String key = iter.next();
List values = requestHeaders.get(key);
String s = key + " = " + values.toString() + "\n";
responseBody.write(s.getBytes());
System.out.println(s);
System.out.print(s.toString());
}
responseBody.close();
}

}
}

[Norm]

explain what it is doing and why that is wrong?