Printing URLConnection request before sending

Question

Java's URLConnection lets us form http requests. After forming a simple POST request like so:

URLConnection con = url.openConnection();
con.addRequestProperty("User-agent", "Mozilla");
con.setDoOutput(true);
String data = "text to send";
OutputStreamWriter wr = new OutputStreamWriter(con.getOutputStream());
wr.write(data);

Is there any way of checking what this request looks like before sending it?

Answer 1

You need to enable logging and in your logging.properties file you should have following property set

handlers= java.util.logging.ConsoleHandler
java.util.logging.ConsoleHandler.level = FINEST
sun.net.www.protocol.http.HttpURLConnection.level=ALL

And, set the property file as a JVM property

-Djava.util.logging.config.file=logging.properties