The address is not understood error authentication

[FSUInnovation]

When trying to authenticate my web platform for file upload using the 0auth2 code flow, I experienced a error. I got my php code to use a header to reach the correct dropbox url for 0auth which worked. I log in, and press accept to allow the app to work with my account, then I get a error in firefox "The address was not understood" for the url https://www.dropbox.com/1/oauth2/authorize_submit that followed hanging my user account registration on that step. I never did 0auth2 before, but my redirect url was never reached and can't continue the user account registration on my site correctly as a result.

[Greg-DB]

The OAuth app authorization flow seems to be working successfully for me in Firefox. Can you share the specific steps to reproduce this issue? Thanks in advance! 

[FSUInnovation]

I use the header in my php page to load to dropbox 0auth. I was able to see the app, log in, and enable the app to the given account. However, instead of bringing me to the localhost8080 uri I specified in the 0auth api url, I was stopped on the way to the dropbox link I showed above. Thus, my account registration process on my site was halted at that dropbox link rather than proceeding me to the redirect uri I specified in the dropbox 0auth api call with header.

[Greg-DB]

@FSUInnovation Can you share some more detail on how exactly I can reproduce this? Or, perhaps you can share a short screencast showing it? I'm not able to reproduce this kind of error when I try the authorization flow myself (or even by browsing directly to the URL in the screenshot). Thanks!

[FSUInnovation]

header("Location: https://www.dropbox.com/2/oauth2/authorize?client_id=4s9vxyownku3sp2&response_type=token&redirect_ur...");

This is the header I used to load onto the 0auth page.

[Greg-DB · Accepted solution]

Thanks! First, note that this should start with "https://www.dropbox.com/oauth2/authorize", not "https://www.dropbox.com/2/oauth2/authorize". That is, you have an extra "2/". 

Also, please try adding the protocol to your redirect URI (both in the authorize URL and pre-registered for your app on the app's page on the App Console). That is, use "http://localhost:8080/FSUInnovation/InternInsert.php" instead of "localhost:8080/FSUInnovation/InternInsert.php".