That's a very specific error and I don't believe should be caught by intercepting any 400 error. You have to make sure you authorize first if you don't have a token.

Dear P2

That's a very specific error and I don't believe should be caught by intercepting any 400 error.

I think so too. But, it's before authentication GET (First time access).

You have to make sure you authorize first if you don't have a token.

Normally, dropbox should return 401, and P2/OAuth2 going to Authentication flow.

But, Dropbox return 400.

Please try to Dropbox Implicit flow grant with P2/OAuth2 if you have spare time.

Thx.

I found one peaky solution.
Add fake bearer token to Header before Authorization.

    func postRequest(path: String, callback: @escaping ((OAuth2JSON?, Error?) -> Void))
    {
        let url = baseURL.appendingPathComponent(path)
        var req = oauth2.request(forURL: url)
        req.httpMethod = "POST"
        req.addValue("application/json", forHTTPHeaderField: "Content-Type")

        if req.value(forHTTPHeaderField: "Authorization") == nil {
            req.setValue("Bearer 000000000000000000000000000000000000000000000000000000000000000_", forHTTPHeaderField: "Authorization")
        }
        ...

It is worked for me. But this is not beautiful solution... 😩

This is an annoying behavior by the API indeed. What I fear is that if indeed there is a problem with the request, a "true" 400, if you set this flag you'll just be prompted to authorize again.

Ok, can you change indentation from spaces to tabs and add to the comment to use this setting only when absolutely necessary?

Dear p2.

Thx for replying!

What I fear is that if indeed there is a problem with the request, a "true" 400, if you set this flag
you'll just be prompted to authorize again.

I think so too. I am worrying about this. Maybe i mess up the p2/oauth2 and causes trouble in other user.

Perhaps it would be better to use way of my fake Authorization header for all p2/oauth2 user.

If you ok, could you add this way to readme and example OAuth2App

Thx!

P.S
I want to send PR to OAuth2App and readme, but my english is so poor 😣 (Using Google Translation now)

Done, thank you!!

https://github.com/p2/OAuth2/wiki/Dropbox