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Re-authenticate using access token

katharina

Hi, i get access token in my app using dropbox api. i want to reauthenticate in the same app on other device using these access token. How i can program it in objective c. Kinldy provide me solutions for this as i need it very badly.

Looking for needfull help.

regards

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Greg-DB

Are you using the official API v2 Objective-C SDK?

If so, you can construct a DBUserClient on the fly using an existing access token using the DBUserClient.initWithAccessToken constructor. If you want to have the SDK store the access token for you, you can use DBOAuthManager.storeAccessToken.

Note that access tokens are sensitive, as they enable access to the account, so make sure you transport the access token securely. That being the case, it may just be easier/safer to process the app authorization flow again on the other device. Also, note that it isn't reccomended to distribute an app with an access token for a particular account embedded in the app, as that can be extracted by a malicious user.

katharina

May i use sdk API v2 on xcode 7.3 version. Also i need link to download the latest sdk for ios.

katharina

i am using sdk 1.3 and api version is 1. And i write my whole in this. so i need a solution for this with coding part. I need it urgent.
Thanks

Greg-DB

It sounds like you're using the iOS Core SDK, for Dropbox API v1. Dropbox API v1 is deprecated and being retired in a few months.

You should migrate to API v2 whenever you can. I recommend using the official API v2 Objective-C SDK.

This is technically possible with the iOS Core SDK as well though. You can store an existing access token using DBSession.updateAccessToken:

- (void)updateAccessToken:(NSString *)token accessTokenSecret:(NSString *)secret forUserId:(NSString *)userId;

You can then init a DBRestClient for that user normally.

katharina

Yes, i user the same method for reauthenticate, but i do not know what i need to call once it is autheticate from this method to fetch dropbox folder. My code is bellow

v1AccessToken i am storing in the sever and accessing when i start my app.

if(v1AccessToken.length>0)
    {
   //  [[DBSession sharedSession] updateAccessToken:v1AccessToken accessTokenSecret:v1AccessTokenSecret forUserId:ui];
      [[DBSession sharedSession] updateAccessToken:@"" accessTokenSecret:@"" forUserId:@""];
        if([DBSession sharedSession] != nil)
        {
        NSLog(@Reauthenticating);
           [self performSelector:@selector(fetchAllDropboxData) withObject:nil afterDelay:0.2];
 
        }

how i can fetch the folder once it is authenticate usign this method. KInldy help me with coding part.

Regards

Greg-DB

Once you've set the access token, you can get a DBRestClient using DBRestClient.initWithSession. From there, you use the client normally:

https://www.dropbox.com/developers-v1/core/start/ios

katharina

Hi Greg, I am using it in this way. But after all that it shows me that it session is expired and do you want to relink it.

if (![[DBSession sharedSession] isLinked])
{
[[DBSession sharedSession] updateAccessToken:@"" accessTokenSecret:@"" forUserId:@""];
self.restClient = [[DBRestClient alloc] initWithSession:[DBSession sharedSession]];
self.restClient.delegate = self;
NSLog(@Reauthenticating);
[self performSelector:@selector(fetchAllDropboxData) withObject:nil afterDelay:0.2];
// [[DBSession sharedSession] linkFromController:self];
{
YourClientsViewController *control = [self.storyboard instantiateViewControllerWithIdentifier:@YourClientsViewController];
[self.navigationController pushViewController:control animated:YES];
}
else
{
[[DBSession sharedSession] linkFromController:self];
UIAlertView *view = [[UIAlertView alloc]initWithTitle:@Account Login! message:@Your dropbox account has been login delegate:nil cancelButtonTitle:@OK otherButtonTitles:nil, nil];
[view show];

if (!loadData)
{
loadData = @"";
}

// [MBProgressHUD showHUDAddedTo:self.view animated:YES];
[self performSelector:@selector(fetchAllDropboxData) withObject:nil afterDelay:0.2];
}

Can you please help me to modify this code so that it will work.

Greg-DB

I'm not sure I follow. Can you share the full error/output you're getting?

Also, to clarify, you are entering the values in updateAccessToken:@"" accessTokenSecret:@"" forUserId:@"" and are just redacting them for the forum, correct?

You should, as the access token is sensitive, but I want to make sure you do have the right values there. The updateAccessToken parameter should be the OAuth 1 access token key, the accessTokenSecret parameter should be the OAuth 1 access token secret, and the forUserId should be your account's user ID.

katharina

Yes, i am entering the access token.
My query is that how you like to use this access token in the below method and display folder ,

self.restClient = [[DBRestClient alloc] initWithSession:[DBSession sharedSession]];
self.restClient.delegate = self;

Greg-DB

Once you've set the access token in the session, and retrieved a client with that session, as above, you can use that client to make calls.

The tutorial covers the basic of using a client to make calls. For example, to list a folder:

https://www.dropbox.com/developers-v1/core/start/ios#listing

What part specifically isn't working for you?

katharina

HI greg,

Suppose i have access token like "dsfhakfhanflfjfba455".

So can you suggest me how i can login to the dropbox without redirecting to the Login controller of dropbox.
Plz help me with a proper code. I am stuck at this from past 2 weeks.

Greg-DB

Can you share the code you have so far and post the error or unexpected output you're getting? If I see what's not working for you, I may be able to offer more help.

Also, is your access token just one piece like that? If so, you likely have an OAuth 2 access token. You indicated you're using the v1 iOS Core SDK, which uses OAuth 1 access tokens, but if you got the token elsewhere, it is likely an OAuth 2 access token. You'll need an OAuth 1 access token if you're using the iOS Core SDK.

If you are working with an OAuth 2 access token, I do recommend using the API v2 SDK instead, per my original message. (That's recommended anyway, as API v1 is deprecated.)

katharina

Hi Greg,

MY token is similar to this y4yp61aez2fn8
--- hope so that now you can understand my query.
My query---- How i can authorise from different devices using the access token or DBSesssion. And once i authorise i want to fetch the data of dropbox. i need the coding solution for this.

katharina

Yes, this is my query is that how we can set the access token in the session and how to retrieve the client. Once you help me to fix it after that i can easily fetch the data. Help me to find solution with code in objective c.

Greg-DB

It sounds like "y4yp61aez2fn8" is the key for an OAuth 1 access token. There should also be a corresponding secret value for the OAuth 1 access token. With those values, you can set the access token using the updateAccessToken method I mentioned ealier.

I don't have any pre-written code for this to share though, as this is not something we recommend you do, and that SDK is deprecated anyway.

That said, if you need help, please share the code you have so far and post the error or unexpected output you're getting. If I see what's not working for you, I may be able to offer more help.

katharina

Yes, i have all access token, token sercert, user id, And i use this all in such way.
1. I create a method for the updateToken as below and in this method i am fetching the folder of dropbox.
2 I call this method to update token in viewDid Load
3 When i run the app, it did not display the folder of the dropbox and even do not that it is logged in the dropbox using updated access or not.

- (void)viewDidLoad
{
[super viewDidLoad]; 
[self updateAccessToken:@zu7k2w75btivr accessTokenSecret:@ndxj3c5u4kzp3 forUserId:@653926434];
}

//update access token method
- (void)updateAccessToken:(NSString *)token accessTokenSecret:(NSString *)secret forUserId:(NSString *)userId
{
[self.restClient loadMetadata:@/];
}

Error---

[WARNING] DropboxSDK: error making request to /1/account/info - (400) invalid_request
[WARNING] DropboxSDK: error making request to /1/metadata/dropbox - (400) invalid_request

Greg-DB

Thanks! That's helpful. It looks like you're defining your own updateAccessToken method. That's actually an existing method on DBSession though. You shouldn't define your own. You should call that on your DBSession instance before attempting API calls such as loadMetadata.