How to get Google drive refresh token automatically - php

Question

I am using php to upload files automatically to Google drive using API/Token, but I discovered that the Token expired after certain of time.
I always get new token from Oauth play ground Page
https://developers.google.com/oauthplayground/
So, how to refresh it automatically using Refresh Code Token
Here is the full code:-
global $GAPIS;
$GAPIS = 'https://www.googleapis.com/';
$name = $name;
$file = $zip_file_name;
$mime_type = 'application/zip';
$access_token = 'token';
$ch1 = curl_init();
curl_setopt($ch1, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch1, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch1, CURLOPT_URL, $GAPIS . 'upload/drive/v3/files?uploadType=media');
curl_setopt($ch1, CURLOPT_BINARYTRANSFER, 1);
curl_setopt($ch1, CURLOPT_POST, 1);
curl_setopt($ch1, CURLOPT_POSTFIELDS, file_get_contents($file));
curl_setopt($ch1, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch1, CURLOPT_HTTPHEADER, array('Content-Type: '.$mime_type, 'Content-Length: ' . filesize($file), 'Authorization: Bearer ' . $access_token) );
$response=curl_exec($ch1);
if($response === false){
$output = 'ERROR: '.curl_error($ch1);
} else{
$output = $response;
}
curl_close($ch1);
$this_response_arr = json_decode($response, true);
if(isset($this_response_arr['id'])){
$this_file_id = $this_response_arr['id'];
$ch2 = curl_init();
curl_setopt($ch2, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch2, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch2, CURLOPT_URL, $GAPIS . 'drive/v3/files/'.$this_file_id);
curl_setopt($ch2, CURLOPT_CUSTOMREQUEST, 'PATCH');
$post_fields = array();
$this_file_name = explode('.', $name);
$post_fields['name']=$this_file_name[0];
curl_setopt($ch2, CURLOPT_POSTFIELDS, json_encode($post_fields));
curl_setopt($ch2, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch2, CURLOPT_HTTPHEADER, array('Content-Type: application/json', 'Authorization: Bearer ' . $access_token) );
$response=curl_exec($ch2);
if($response === false){
$output = 'ERROR: '.curl_error($ch2);
} else{
$output = $response;
}
curl_close($ch2);
$print = json_decode($output, true);
if ($this_file_name[0] = $print['name']) {
echo "file uploaded successfully and ";
}
}
unlink ($file);die("Zip file removed");
return $output;
EDIT: Solution:-
Thanks a lot for Ronak Dhoot about his solution and here is the CURL code to get the refresh token automatically
$client_id = 'client_id';
$client_secret = 'client_secret';
$refresh_token = 'refresh_token';
$url = 'https://www.googleapis.com/oauth2/v4/token';
$fields = [
'client_id' => $client_id,
'client_secret' => $client_secret,
'refresh_token' => $refresh_token,
'grant_type' => 'refresh_token'
];
$fields_string = http_build_query($fields);
$ch = curl_init();
curl_setopt($ch,CURLOPT_URL, $url);
curl_setopt($ch,CURLOPT_POST, true);
curl_setopt($ch,CURLOPT_POSTFIELDS, $fields_string);
curl_setopt($ch,CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($ch);
$access_result = json_decode($result, true);
$access_token = $access_result['access_token'];
echo $access_token;

Answer 1

in Step 1 when Click “Authorize APIs” and allow access to your account when prompted. There will be a few warning prompts, just proceed.
When you get to step 2, check “Auto-refresh the token before it expires” and click “Exchange authorization code for tokens”.
When you get to step 3, click on step 2 again and you should see your refresh token.
Now, All you need to do is a post request like below :-
POST https://www.googleapis.com/oauth2/v4/token
Content-Type: application/json
{
"client_id": <client_id>,
"client_secret": <client_secret>,
"refresh_token": <refresh_token>,
"grant_type": "refresh_token"
}