I\'m trying to make PUT request with JSON data using HttpURLConnection
in Java. The way I do it doesn\'t work. I get no errors so I don\'t know what the problem
The Sun (Oracle) implementation of HttpURLConnection caches the content of your post unless you tell it to be in streaming mode. The content will be sent if you start interaction with the response such as:
hurl.getResponseCode();
Also, according to RFC 4627 you can not use single quotes in your json (although some implementations seem to not care).
So, change your payload to:
String payload = "{\"pos\":{\"left\":45,\"top\":45}}";
This example works for me
public class HttpPut {
public static void main(String[] args) throws Exception {
Random random = new Random();
URL url = new URL("http://fltspc.itu.dk/widget/515318fe17450f312b00153d/");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("PUT");
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/json");
connection.setRequestProperty("Accept", "application/json");
OutputStreamWriter osw = new OutputStreamWriter(connection.getOutputStream());
osw.write(String.format("{\"pos\":{\"left\":%1$d,\"top\":%2$d}}", random.nextInt(30), random.nextInt(20)));
osw.flush();
osw.close();
System.err.println(connection.getResponseCode());
}
}