Auto Login Dropbox Account on Core API Without Login Prompt

Auto Login Dropbox account on Core Api without Login Prompt

The Dropbox API was designed with the intention that each user would link their own Dropbox account, in order to interact with their own files. However, it is technically possible to connect to just one account. The SDKs don't offer explicit support for it and we don't recommend doing so, for various technical and security reasons.

However if you did want to go this route, instead of kicking off the authorization flow, you would manually use an existing access token for your app. (Just be careful not to revoke it, e.g. via https://www.dropbox.com/account/security .) In the iOS Core SDK you'd need to use:

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

Again though, this isn't a good idea. Since this would be a client-side app, any malicious user of your app could extract the access token and use it to bypass any access restrictions your app attempted to enforce. For example, they could access content they shouldn't or add or replace content with a malicious payload that other users would access.

Use of dropbox with core APIs, but avoiding login page

Putting probable solution to my own question here:
The main issue here was about re-generation of the Access Token at some intervals, that too without any user interaction, a backend stuff.
After going through Dropbox APIs, I concluded there is no API exposed for re-generation of Access Token automatedly.
But Google Drive do offer Service Account, which do not require user interaction.

How to use Dropbox Chooser without forcing the user to login to the Dropbox account used

try this this link

it may help you .
first you have to register your app ,
then Dropbox will provide you some keys:
keep that in authorize.php file of your app e.g

<?php
$access_token = array (
  "oauth_token_secret" => "abcdefghilmnopqr",
  "oauth_token" => "stuvwxyzabcdefgh",
  "uid" => "1234567"
);

The first time your application is run, the following condition in the index.php file will be true:

<?php
if (!isset($access_token)) {
    header("Location: authorize.php");
    exit;
}

the authorize.php will manage automatically for you .

Upload to Dropxbox without redirect to Web

It is not possible to fully automate the process of retrieving an access token and optional refresh token. This needs to be done manually by the user at least once. If your app needs to maintain long-term access without the user manually re-authorizing it repeatedly, the app should request "offline" access so that it gets a refresh token. The refresh token doesn't expire and can be stored and used repeatedly to get new short-lived access tokens whenever needed, without the user manually reauthorizing the app.

https://developers.dropbox.com/oauth-guide

Dropbox API direct account access

To access a user's Dropbox account via the API, your app will need to be authorized by the user. The Dropbox API currently requires that this authorization be done via the OAuth flow. You only need to perform this step once per user though, as you can store and reuse the access token for each user.

It sounds like you intend to use only one account though (your own), so you can just process this flow once manually yourself, and save and reuse the access token programmatically.

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