Item2490: Java Applet datatransfer to Foswiki (HttpRequest)

Hi!

I´m just switching our Wiki from Mediawiki to Foswiki.

We integrated an Java Applet into our Wiki. Between the Applet and the Wiki i have to transfer data in both directions (strings and files). In Mediawiki i realized the transfer from applet to wiki with a http-request. I handled the request with some php code in a "special page". I think in Foswiki i can handle it with a REST-Handler??

Now i would like to integrate our Applet into the Foswiki. I looked for some extensions with the same problem. I found the JHotDraw Plugin but i still wonder if it´s not possible to transfer data with an direct http-request out of the applet? Is it necessary to use this javascript file as an interface?

Here is some Code of our Http-Request:

HttpURLConnection conn = null;
BufferedReader response = null;
try {
        URL url = new URL(getDocumentBase(), uploadURL);
	conn = (HttpURLConnection)url.openConnection();
	ClientHttpRequest request = new ClientHttpRequest(conn);
        request.setParameter("validation_key", validation_key);	
        request.setParameter("topic", "WebHome");
	request.setParameter("filename", "Test123");

..........................................

I always get an java error:

Fehler: uncaught exception: Error calling method on NPObject! [plugin exception: java.security.AccessControlException: access denied (java.util.PropertyPermission http.strictPostRedirect read)].

Is there any tutorial or other help how i can get my files out of the java applet?

Thank you in advance, Alex

---

See NotesOnJavaApplets, and the Java and Javascript code in JHotDrawPlugin. The javascript is required to support the double-submission validation process, because (as I discovered to my chagrin) Java can't access cookies in the browser domain.

BTW please use the Support web on Foswiki.org for support queries; this is a bug tracker. Thanks.

-- CrawfordCurrie - 12 Dec 2009