John Davidson

Message:

Currently, I am working/integrating Fitbit API on my Yii2 framework.

Code sample like this:

if($_SERVER['HTTP_HOST'] == 'localhost'){

    define('REDIRECT_URI', 'https://localhost/yii/contest/FitbitDeviceChange');

}else{

    define('REDIRECT_URI', "https://".$_SERVER['HTTP_HOST']."/site/SocialSiteFitfit");

}

define('HOST', 'https://api.fitbit.com/');

define('ACCESS_TOKEN_URL', 'https://api.fitbit.com/oauth2/token');

define('AUTHENTICATE_URL', 'https://www.fitbit.com/oauth2/authorize');



class FitbitApiController extends FrontController {

    private $accessToken = null;

    private $refreshToken = null;

    private $expires = 31536000;

    public $CLIENT_ID = '';

    public $CLIENT_SECRET = '';

    public $REDIRECT_URI = REDIRECT_URI;



    /**

    * \fn getAuthorizationCode() launch the authorization page

    *

    */

    public static function getAuthorizationCode($CLIENT_ID) {

        $url = AUTHENTICATE_URL.'?response_type=code&prompt=login consent&client_id='.$CLIENT_ID.

            '&redirect_uri='.urlencode(REDIRECT_URI).

            '&scope=activity%20profile&expires_in=31536000';

        header('Location: '.$url);

    }

}

API Integration is currently done and working fine, but after a certain time token expired, I never want customers again and again to accept a request, I want customers to accept requests once and never expired token and not need to connect again and again.

Any Idea how to prevent token expiration?

My refresh code URL is: https://github.com/namelivia/fitbit-http-php

---

My Answer:
To prevent token expiration and avoid the need for customers to accept requests again and again, you can implement token refreshing in your Fitbit API integration. Here's how you can modify your code to include token refreshing:

1. Store the refresh token:
When you initially authenticate the user and obtain the access token and refresh token, make sure to store the refresh token securely in your database or session.

2. Implement token refreshing:
Create a method in your FitbitApiController class to handle token refreshing. This method should make a POST request to the Fitbit API's token endpoint with the refresh token to obtain a new access token. Here's an example of how you can implement token refreshing:

php
public function refreshToken() {
$data = array(
'grant_type' => 'refresh_token',
'refresh_token' => $this->refreshToken
);

$headers = array(
'Authorization: Basic ' . base64_encode($this->CLIENT_ID . ':' . $this->CLIENT_SECRET),
'Content-Type: application/x-www-form-urlencoded'
);

$ch = curl_init(ACCESS_TOKEN_URL);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($ch);
$response = json_decode($response, true);

if(isset($response['access_token'])) {
$this->accessToken = $response['access_token'];
$this->expires = $response['expires_in'];
}

curl_close($ch);
}


3. Check token expiration before making API requests:
Before making any API requests, check if the access token has expired. If it has expired, call the refreshToken method to obtain a new access token before making the API request. Here's an example of how you can check token expiration:

php
if($this->accessTokenExpired()) {
$this->refreshToken();
}

// Make API request using $this->accessToken


4. Handle token expiration gracefully:
If the refresh token has also expired, you may need to prompt the user to re-authenticate and obtain a new access token and refresh token.

By implementing token refreshing in your Fitbit API integration, you can ensure that the access token remains valid and prevent the need for customers to accept requests again and again.