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DropBox API auth error - {".tag" = "expired_access_token"}
Language Swift
iOS Version 14.4
We have app where we use dropbox api to allow our users to upload a document.
This app used to working perfectly two years ago.
Very recently we ma...
Greg-DB
Dropbox Community Moderator
Dropbox Community ModeratorYou do not need to send the user through the authorization flow every time they want to use the Dropbox integration. You can have them authorize it once, using authorizeFromControllerV2, and the SDK will automatically store the resulting access token and refresh token for you. You can use authorizedClient to check if you already have credentials saved for that user, and use it if so. The SDK will automatically perform the refresh process for you whenever needed.
Note though that the user or app can revoke the authorization at any time though, at which point you would need to have the user re-authorize the app if they wish to continue using the integration.
You did not answer to my question.
The problem is that DropboxClientsManager.authorizedClient is not nil all the time and I do not know how to check if user is authorized or not.
Please be specific.
- Greg-DB
That is how you check. You can check if authorizedClient is nil or not. If it is not nil, that means you have a saved client to use for that user. (And if the app was disconnected from the account server-side, attempting to use it will accordingly fail with an error.)
Please let me know if I miss anything from the following
1. I remove the app completely from simulator or device
2. I disconnec the dropbox app from my dropbox account
3. I clean and rebuild the code.
4. I run the app and click to dropbox connect button the following function runs
func sendUsingDropBox() {
let dbClient = DropboxClientsManager.authorizedClient
if (dbClient != nil) {
isDropBoxModalOpened = false
startWI()
dbClient?.files.listFolder(path: "", recursive: true, includeMediaInfo: true).response(queue: DispatchQueue(label: "DbLfSerialQueue")) { response, error in
if let result = response {
self.dbFolders.removeAll()
result.entries.forEach({(metdaData) in
if !metdaData.description.contains("size=") && !metdaData.description.contains("size =") {
self.dbFolders.append(metdaData.pathDisplay!)
}
})
DispatchQueue.main.async {
self.stopWI()
self.showChooser()
}
} else if let error = error {
print(error.description)
DispatchQueue.main.async {
self.stopWI()
let alert = UIAlertController(title: "DropBox", message: error.description, preferredStyle: UIAlertControllerStyle.alert)
alert.addAction(UIAlertAction(title: THAlerts.Ok, style: UIAlertActionStyle.default, handler: nil))
self.present(alert, animated: false, completion: nil)
}
}
}
} else {
isDropBoxModalOpened = true
let scopeRequest = ScopeRequest(scopeType: .user, scopes: ["account_info.read", "files.content.write", "files.content.read", "files.metadata.write", "files.metadata.read"], includeGrantedScopes: false)
DropboxClientsManager.authorizeFromControllerV2(UIApplication.shared, controller: self, loadingStatusDelegate: nil, openURL: { (url: URL) -> Void in
UIApplication.shared.open(url, options: [:], completionHandler: nil)}, scopeRequest: scopeRequest)
}
}
And what happens is that dbClient is not NULL and because of that it returns an error.
In my understanding dbClient must be NULL because everything was cleaned and removed.
What I miss here?
- Greg-DB
Even if you've uninstalled the app, the client may still be saved locally since that's persisted in the iOS keychain. And if you've disconnected the app via the Dropbox web site, the SDK won't yet know that the connection has been revoked on the server until you attempt an actual API call, like listFolder, at which point you'll get an authorization error.
You can just call authorizeFromControllerV2 again to prompt the user to re-authorize the app. Or, if you do want to explicitly remove the local client, you can call unlinkClients at any time.
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