title: Dropbox OAuth2 authorize API is not redirecting as expected
body: <p>I'm attempting to connect to the <a href="https://www.dropbox.com/developers/core/docs#oa2-authorize" rel="nofollow noreferrer">Dropbox API using OAuth2</a>. I'm using <a href="https://github.com/DropNet/DropNet" rel="nofollow noreferrer">DropNet</a> as the client library and using the Token (implicit grant) flow option. The test code (roughly the same as <code>DropNet.Samples.WinForms</code>) is a simple dialog with an embedded browser control to display the API login page.</p>
  
  <p>The problem I'm seeing is that the API does not redirect the browser to the specified redirect URL (<code>http://localhost</code>). After I provide my credentials and click Allow to grant access, instead of being redirected to localhost I'm redirected to <code>https://www.dropbox.com/1/oauth2/authorize_submit</code>, which fails to load (error 404). There are also no query parameters on the redirected URL. I'm expecting to be redirected to localhost with query parameters containing an authorization code.</p>
  
  <p>For reference the login URL is: <code>https://www.dropbox.com/1/oauth2/authorize?response_type=token&amp;client_id=&lt;blah&gt;&amp;redirect_uri=http://localhost</code>.</p>
  
  <p>Does anyone know what I'm doing wrong? The behavior looks very similar to what's described in: <a href="https://stackoverflow.com/questions/25734460/obtain-oauth2-access-token-for-dropbox-core-api-with-codenameones-oauth2-class">Obtain OAuth2 Access Token for Dropbox Core API with Codenameone&#39;s Oauth2 Class</a>, but there's no direct answer there.</p>