Question

I have a bit of Java code that attempts to send POST data over to t Django application. However, the view is simply never called. If I paste the same URL the java code hits into my browser, the Django view is called. I have no idea what I am missing, but something must be wrong with the Java write.

This is the Java function doing the write:

public void executeWrite(String requestUrl, JsonObject jsonObject)
{
    DataInputStream  input = null;
    try
    {
        URL                 url;
        HttpURLConnection urlConn;
        DataOutputStream printout;

        System.out.println(requestUrl);
        // URL of CGI-Bin script.
        url = new URL (requestUrl);
        // URL connection channel.
        urlConn = (HttpURLConnection)url.openConnection();
        // Let the run-time system (RTS) know that we want input.
        urlConn.setDoInput (true);
        // Let the RTS know that we want to do output.
        urlConn.setDoOutput (true);
        // No caching, we want the real thing.
        urlConn.setUseCaches (false);
        // Specify the content type.
        urlConn.setRequestMethod("POST");
        urlConn.setRequestProperty("content-type","application/json; charset=utf-8");

        OutputStreamWriter wr = new OutputStreamWriter(urlConn.getOutputStream());
        wr.write(jsonObject.toString());
        wr.flush();
        wr.close();
    }
    catch(Exception ex)
    {
        ex.printStackTrace();
    }
}

Now the requestURL passed into the function directly corresponds to the one for the Django view. The requestURL is:

http://127.0.0.1:8000/events/rest/33456/create

This is the Django Urlconfig:

(r'^events/rest/(?P<key>\d+)/create', 'events.views.restCreateEvent'),

Finally this is the view that never gets called by the Java code

@csrf_exempt 
def restCreateEvent(request, key):
    #doesn't really matter what is in here it never runs

So, what am I doing wrong that the POST request is never received by the Django sever? I’ve spent about 2 hours trying to figure it out and I can’t find any issues with the Java code. Clearly something is wrong though.

Answer 1

Make sure your view is csrf exempt since you are not sending the appropriate CSRF token from the Java request.