how to upload files to google drive using php with access token - php

Question

Am trying to upload a files to my google drive account with php and curl. I do not want all these long authentication flow of a thing. To this effect,I implemented the code below
$secret ="xxxxxx";
$clientid ="xxxxxxx";
$ch = curl_init ();
curl_setopt_array ( $ch, array (
CURLOPT_URL => "https://www.googleapis.com/upload/drive/v3/files?uploadType=media&clientID=xxxxxxx&secret=xxxxxxx",
CURLOPT_HTTPHEADER => array (
'Content-Type: image/png'),
CURLOPT_POST => 1,
CURLOPT_POSTFIELDS => file_get_contents ('iconc.png' ),
CURLOPT_RETURNTRANSFER => 1
) );
$res = curl_exec($ch);
$err = curl_error($ch);
echo $res;
var_dump($res);
echo "<br>";
echo "<br>";
echo $err ;
I have enabled my google Drive Api and I have been assigned client id and secret but when I run the code its saying invalid credentials as per below
{ "error": { "errors": [ { "domain": "global", "reason": "required", "message": "Login Required", "locationType": "header", "location": "Authorization" } ], "code": 401, "message": "Login Required" } } string(238) "{ "error": { "errors": [ { "domain": "global", "reason": "required", "message": "Login Required", "locationType": "header", "location": "Authorization" } ], "code": 401, "message": "Login Required" } } "
Please where do I pass the client id and secret in the code above or do i need something like access token. if yes where do I get the google drive API access token. any solution is welcome. Thanks

Answer 1

You have two options the first is to add the access token to the request
https://www.googleapis.com/upload/drive/v3/files?access_token={YourToken}
The second is to add it as a header in the request
curl -H 'Accept: application/json' -H "Authorization: Bearer ${TOKEN}"
https://www.googleapis.com/upload/drive/v3/files
Using the client id as you have done here clientID=xxxxxxx&secret=xxxxxxx is basic authorization not Oauth2 you are missing the authorization step.
You should consider following the php quickstart here
<?php
require __DIR__ . '/vendor/autoload.php';
if (php_sapi_name() != 'cli') {
throw new Exception('This application must be run on the command line.');
}
/**
* Returns an authorized API client.
* #return Google_Client the authorized client object
*/
function getClient()
{
$client = new Google_Client();
$client->setApplicationName('Google Drive API PHP Quickstart');
$client->setScopes(Google_Service_Drive::DRIVE_METADATA_READONLY);
$client->setAuthConfig('credentials.json');
$client->setAccessType('offline');
$client->setPrompt('select_account consent');
// Load previously authorized token from a file, if it exists.
// The file token.json stores the user's access and refresh tokens, and is
// created automatically when the authorization flow completes for the first
// time.
$tokenPath = 'token.json';
if (file_exists($tokenPath)) {
$accessToken = json_decode(file_get_contents($tokenPath), true);
$client->setAccessToken($accessToken);
}
// If there is no previous token or it's expired.
if ($client->isAccessTokenExpired()) {
// Refresh the token if possible, else fetch a new one.
if ($client->getRefreshToken()) {
$client->fetchAccessTokenWithRefreshToken($client->getRefreshToken());
} else {
// Request authorization from the user.
$authUrl = $client->createAuthUrl();
printf("Open the following link in your browser:\n%s\n", $authUrl);
print 'Enter verification code: ';
$authCode = trim(fgets(STDIN));
// Exchange authorization code for an access token.
$accessToken = $client->fetchAccessTokenWithAuthCode($authCode);
$client->setAccessToken($accessToken);
// Check to see if there was an error.
if (array_key_exists('error', $accessToken)) {
throw new Exception(join(', ', $accessToken));
}
}
// Save the token to a file.
if (!file_exists(dirname($tokenPath))) {
mkdir(dirname($tokenPath), 0700, true);
}
file_put_contents($tokenPath, json_encode($client->getAccessToken()));
}
return $client;
}
// Get the API client and construct the service object.
$client = getClient();
$service = new Google_Service_Drive($client);
// Print the names and IDs for up to 10 files.
$optParams = array(
'pageSize' => 10,
'fields' => 'nextPageToken, files(id, name)'
);
$results = $service->files->listFiles($optParams);
if (count($results->getFiles()) == 0) {
print "No files found.\n";
} else {
print "Files:\n";
foreach ($results->getFiles() as $file) {
printf("%s (%s)\n", $file->getName(), $file->getId());
}
}