HTTP OPTIONS method with Java

Question

I need to create a simple HTTP client program with Java.

I've not found any example of implementation in Java that allows calling the OPTIONS method to get the Allow header with the allowed methods on the server.

I tried using:

HttpURLConnection http = (HttpURLConnection) url.openConnection();
System.out.println(http.getHeaderFields());

But the field Allow: GET, POST ... is not included.

Possible duplicate of [Using java.net.URLConnection to fire and handle HTTP requests](http://stackoverflow.com/questions/2793150/using-java-net-urlconnection-to-fire-and-handle-http-requests) — ArtKorchagin, Nov 01 '15 at 22:11
In the case, my request message was not correct edited. I've edited the request and now it's working well. Thanks! — bcndrass, Nov 07 '15 at 18:27

score 3 · Accepted Answer · answered Nov 04 '15 at 05:00

The connection object fires a GET request by default. You need to set the request method to OPTIONS.

HttpURLConnection conn = (HttpURLConnection) url.openConnection();
System.out.println(conn.getRequestMethod()); // GET
conn.setRequestMethod("OPTIONS");
System.out.println(conn.getHeaderField("Allow")); // depends

HTTP OPTIONS method with Java

1 Answers1