HTTP-CODE 500 when POST via https

Question

Hi,
I've a serious problem here. When I try to post some data to a https server I'll always get an 500 internal Server Error back. What could be the problem? Here is my code that is responsible for posting:
        System.setProperty("proxySet","true");
        System.setProperty("https.proxyHost",prxy);
        System.setProperty("https.proxyPort",prxyPrt);
String hh = "https://" + host;
            URL u = new URL(hh);
            con = (HttpsURLConnection)u.openConnection();
            con.setDoOutput(true);
            con.setDoInput(true);
            PrintWriter out = new PrintWriter(con.getOutputStream());
            out.write(daPost);
            out.flush();
            BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
            int c;
            while((c = in.read()) != -1) {
                System.out.write(c);
            con.disconnect();The stuff that is stored in daPost is bullet-proof correct, because when it is posted with a VB-Application everything is ok........ and it is verified that both my java-application and the vb-application are producing the same POST-Data
What could be the problem?
Big thx in advance.
LoCal

Answer 1

Did you try to make the same post from an html form using a browser? That might show some extra info on what the problem with the post excactly is. Also, you are using a proxy server, the 500 reply could come from the host you are posting to, but also from the proxy server.
What's in host? Is there a full url in it, or just the hostname? It might be you are trying to post to "https://somewhere.com" instead of to "https://somewhere.com/somescript.cgi".