I followed again THIS TUTORIAL to upload a file on Google Drive with php, directly from my REMOTE SERVER: so I have created new API Project from Google API Console, enabled Drive API service, requested OAuth Client ID and Client Secret, wrote them in a script, then upload it together with Google APIs Client Library for PHP folder to this http://www.MYSERVER.com/script1.php, to retrieve Auth code:
<?php
require_once 'google-api-php-client/src/Google_Client.php';
require_once 'google-api-php-client/src/contrib/Google_DriveService.php';
$drive = new Google_Client();
$drive->setClientId('XXX'); // HERE I WRITE MY Client ID
$drive->setClientSecret('XXX'); // HERE I WRITE MY Client Secret
$drive->setRedirectUri('urn:ietf:wg:oauth:2.0:oob');
$drive->setScopes(array('https://www.googleapis.com/auth/drive'));
$gdrive = new Google_DriveService($drive);
$url = $drive->createAuthUrl();
$authorizationCode = trim(fgets(STDIN));
$token = $drive->authenticate($authorizationCode);
?>
When I visit http://www.MYSERVER.com/script1.php I allow authorization and get the Auth code that I can write in a second script. Then I upload it to http://www.MYSERVER.com/script2.php, who looks like:
<?php
require_once 'google-api-php-client/src/Google_Client.php';
require_once 'google-api-php-client/src/contrib/Google_DriveService.php';
$drive = new Google_Client();
$drive->setClientId('X'); // HERE I WRITE MY Client ID
$drive->setClientSecret('X'); // HERE I WRITE MY Client Secret
$drive->setRedirectUri('urn:ietf:wg:oauth:2.0:oob');
$drive->setScopes(array('https://www.googleapis.com/auth/drive'));
$gdrive = new Google_DriveService($drive);
$_GET['code']= 'X/XXX'; // HERE I WRITE AUTH CODE RETRIEVED AFTER RUNNING REMOTE script.php
file_put_contents('token.json', $drive->authenticate());
$drive->setAccessToken(file_get_contents('token.json'));
$doc = new Google_DriveFile();
$doc->setTitle('Test Drive');
$doc->setDescription('Document');
$doc->setMimeType('text/plain');
$content = file_get_contents('drive.txt');
$output = $gdrive->files->insert($doc, array(
'data' => $content,
'mimeType' => 'text/plain',
));
print_r($output);
?>
Well, now the file drive.txt is uploaded on my Google Drive and structure of token.json file is a sort of:
{"access_token":"XXX","token_type":"Bearer","expires_in":3600,"refresh_token":"YYY","created":1365505148}
Now, as you can imagine I can call script2.php and upload file until a certain time. Finally, the point is: I don't want the token to expire, I don't want to allow authorization each time it expire (recalling script1.php): I need to call the script2.php periodically during the day, to upload my file automatically, without user interaction. So, what's the best way to automatically refresh the token forever in this context? Do I need another script? Can I add some code to script2.php? or modify the token.json file? And where can I read the time remaining before the token expire? Thanks!