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Dropbox .NET SDK (Refresh Token)
Hi, I found changes in OAuth2 for API, so the authorization could be done with offline access, ascuirung both Access and Refresh tokens. This part is OK, with ProcessCodeFlow method in SDK. But co...
GevorgMel This functionality should now be available on DropboxTeamClient as of release v5.1.0. Please update and give that a try and let us know if you run in to any issues. Thanks!
Greg-DB
Dropbox Community Moderator
Dropbox Community ModeratorOFV The Dropbox client in the SDK can and will automatically handle the refresh for you, and you shouldn't even need to access to refresh token or new access token after a refresh. The refresh token doesn't change, and the client will automatically set its new access token. And if you need another client, you can just create it like you did originally and let the client handle the refresh again if needed.
Excellent! thanks
Greg, I still can't get it to work for a duration longer than the access token's validity.
(this part works:)
I ask for user authentication (only once) using the DropboxOAuth2Helper.GetAuthorizeUri with OAuthResponseType.Code and TokenAccessType.Offline.
The resulting POST http request gives me a code and DropboxOAuth2Helper.ProcessCodeFlowAsync provides me an access token and refresh token based on that code. The tokens are persisted in the DB and to be used for longer periods (months) without the user needing to re-login
(this part fails:)
The DropboxClient is instantiated with the Access_token and refresh token retrieved in the first part.
Using the DropboxClient.Files.ListFolderAsync it works for a while (a few hours after initial usser auth), but the next day it fails with "Dropbox.Api.AuthException: expired_access_token/"
It concerns an MVC webapp, and the dropboxclient is newly instantiated on every use.
I thought the DropboxClient would do "it's thing" using the initial access and refresh tokens.
(I am using the Official Dropbox .Net v2 SDK v5.5.0 Nuget package)
- Greg-DB
OFV When your "DropboxClient is instantiated with the Access_token and refresh token", are you also supplying the app key and secret? Those are required to perform the refresh. Make sure you're doing so, like in the example here.
Yes I am using the appid and appsecret. I'm using the constructor as in the example, with the addition of the access token expiry date:
CurrentClient = new DropboxClient(accessToken, refreshToken, expiryDate, appKey, appSecret, config);
The access token returned starts with sl. and is 139 bytes long. The refresh token starts with 1y_ and is 64 bytes long.
Fetching data from the api works up to the expiry date, which was set to 2020-12-09 17:37:48. After that fetching data takes a few minutes (!!) before throwing the exception.
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