Recommended OAuth authentication methods

Now I need to write an open-source program. Some of the functions are to obtain all the files in a folder of the Dropbox user. Because it is an open-source program, at first I thought using BasicAuth or xAuth is the best, but Dropbox does not seem to support it (I did not find any relevant information... now I need to write an open-source program. Some of the functions are to obtain all the files in a folder of the Dropbox user.
Because it is an open-source program, I initially thought using Basic Auth or xAuth is the best, but Dropbox does not seem to support it (I did not find any relevant materials)
When I was about to use OAuth 2.0, I suddenly remembered that OAuth 2.0 was required. Callback Url. Because open-source programs are used on their own websites Callback UrlIt must not be different, so I am troubled again. Should I use an intermediate proxy?

So I would like to ask if there are any good authentication methods or Network Disk services for my needs.

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Now I need to write an open-source program. Some of the functions are to obtain all the files in a folder of the Dropbox user.
Because it is an open-source program, I initially thought using Basic Auth or xAuth is the best, but Dropbox does not seem to support it (I did not find any relevant materials)
When I was about to use OAuth 2.0, I suddenly remembered that OAuth 2.0 was required.Callback Url. Because open-source programs are used on their own websitesCallback UrlIt must not be different, so I am troubled again. Should I use an intermediate proxy?

So I would like to ask if there are any good authentication methods or Network Disk services for my needs.

Http://www.dotblogs.com.tw/larrynung/archive/2012/08/08/73912.aspx