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Java desktop DbxWebAuth with withRedirectUri NPE

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Java desktop DbxWebAuth with withRedirectUri NPE

New member | Level 2

Hi everyone, as I wrote in the object, I get an NPE on the line:

 HttpSession session = request.getSession(true);

Hi everyone, as I wrote in the object, I get an NPE on the line:

I'm using this code to prevent the user from manually entering the verification code into my app. from the example codes I found HttpServletRequest is not initialized (null). Do you have any examples examples? Thank you
This is the complete code

public static void main(String[] args) throws DbxException, IOException, URISyntaxException {

        HttpServletRequest request = null;
        HttpServletResponse response = null;

        DbxRequestConfig config = new DbxRequestConfig("berry120_dropbox_example"); //Client name can be whatever you like

        DbxAppInfo appInfo = new DbxAppInfo("my_code", "my_code");
        DbxWebAuth webAuth = new DbxWebAuth(config, appInfo);

        //redirect URL 
        String redirectUri = "http://localhost:8080";
        HttpSession session = request.getSession(true);

        DbxSessionStore csrfTokenStore = new DbxStandardSessionStore(session, "vj38b0mkkxnnbjg");

        DbxWebAuth.Request authRequest = DbxWebAuth.newRequestBuilder()
                .withRedirectUri(redirectUri, csrfTokenStore)
                .build();

        String authorizePageUrl = webAuth.authorize(authRequest);
        try {
            response.sendRedirect(authorizePageUrl);

        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
1 Reply 1
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Re: Java desktop DbxWebAuth with withRedirectUri NPE

Dropboxer

[ Cross-linking for reference: https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/Java-desktop-DbxWebAuth-with-withRedire... ]

 

This DbxWebAuth flow is meant for use with web apps, via whatever web framework you might be using. The request and response objects in this basic sample initially aren't set, and instead are just null as a placeholder. Without setting them, the NPE is expected.

 

We do have a working example with these set here:

 

https://github.com/dropbox/dropbox-sdk-java/blob/c710ef80f1c2700031baad7c615dc9934162c090/examples/w...

 

 

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