Google Drive API in PHP - php

Question

I had a problem on making the Google Drive API work. I want to allow public user to search on my file list and upload files to my Google Drive.
I created an API key on my developer console and added it to the following script and try to read a list of my files, but didn't work. It returned "500 Internal Server Error". Do I miss anything?
require_once 'google-api-php-client/src/Google/autoload.php';
$client = new Google_Client();
$client->setDeveloperKey("MY_API_KEY");
$client->addScope("https://www.googleapis.com/auth/drive");
$dr_service = new Google_Service_Drive($client);
$dr_results = $dr_service->files->listFiles(array('maxResults' => 10))
I tried to use ClientID (see the following code) and it works but I don't want to prompt the user to login to their google account and I want them to do everything on my account. Or how can I call the oauth with my account without prompting the user?
session_start();
require_once 'google-api-php-client/src/Google/autoload.php';
$client = new Google_Client();
// Get your credentials from the console
$client->setClientId('MY_CLIENT_ID');
$client->setClientSecret('MY_CLIENT_SECRET');
$client->setRedirectUri('MY_URL');
$client->setScopes(array('https://www.googleapis.com/auth/drive'));
$authUrl = $client->createAuthUrl();
if (isset($_GET['code'])) {
$client->authenticate($_GET['code']);
$_SESSION['token'] = $client->getAccessToken();
header('Location: http://MY_URL');
}
if (!$client->getAccessToken() && !isset($_SESSION['token'])) {
$authUrl = $client->createAuthUrl();
print "<a class='login' href='$authUrl'>Connect Me!</a>";
}
if (isset($_SESSION['token'])) {
print "<a class='logout' href='".$_SERVER['PHP_SELF']."?logout=1'>LogOut</a><br>";
$client->setAccessToken($_SESSION['token']);
$service = new Google_Service_Drive($client);
var_dump($service->files->ListFiles());
}

Answer 1

download the files from here google drive client in a folder google_drive.Then try this code
include the three files .
require 'google_drive/Google_Client.php';
require 'google_drive/contrib/Google_DriveService.php';
require 'google_drive/socialmedia_oauth_connect.php';
create new object of the classess.
$client_gd = new Google_Client();
$service = new Google_DriveService($client_gd);
$file=new Google_DriveFile();
set access token
if(isset($_GET['code']))
{
$authCode = $_REQUEST['code'];
$accessToken = $client_gd->authenticate($authCode);
$_SESSION['access_token_gd']=$accessToken;
$client_gd->setAccessToken($accessToken);
$about = $service->about->get();
$user=$about['permissionId'];
$_SESSION['gd_user']=$user;
$_SESSION['user_info_gd']=$about;
header('location:'.HOME.'?index_gd=1');
}
authenticate with google drive
$authUrl = $client_gd->createAuthUrl();
//$clientid = $gdsettings->gdclient_id;
// $clientsec = $gdsettings->gdclient_secret;
$redirecturi = HOME.'index.php';
$oauth = new socialmedia_oauth_connect();
$oauth->provider="Google";
global $apiConfig;
$oauth->client_id = $apiConfig['oauth2_client_id'];
$oauth->client_secret = $apiConfig['oauth2_client_secret'];
$oauth->scope="https://www.googleapis.com/auth/drive https://www.googleapis.com/auth/drive.file https://www.googleapis.com/auth/drive.metadata.readonly https://www.googleapis.com/auth/drive.appdata https://www.googleapis.com/auth/drive.readonly https://www.googleapis.com/auth/drive.apps.readonly https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/plus.me https://docs.google.com/feeds/ https://docs.googleusercontent.com/ https://spreadsheets.google.com/feeds/";
$oauth->redirect_uri = $apiConfig['oauth2_redirect_uri'];
$oauth->approval_prompt = "force";
$oauth->Initialize();
$oauth->Authorize();
get the files
$accessToken=$_SESSION['access_token_gd'];
$client_gd->setAccessToken($accessToken);
//print_r($client_gd->getAccessToken());
//List of files
$arr = array();
$files = $service->files->listFiles();
$about = $service->about->get();
$user=$about['permissionId'];
//$_SESSION['gd_user']=$user;
//$_SESSION['user_info_gd']=$about;
$drivefiles = $files["items"];
foreach($drivefiles as $divefl )
{
echo $divefl['title'];
}
here is the full description you can read google drive client integration