Setting up file access permissions on Google Drive using PHP and cURL

Other Questions Google drive
1

I’m having trouble with the Google Drive API. I want to set up file permissions using PHP and cURL, but I keep receiving errors. Here’s what I attempted:

$token = 'my_access_token';
$file = 'my_file_id';

$curl = curl_init();
curl_setopt_array($curl, [
    CURLOPT_URL => "https://www.googleapis.com/drive/v3/files/$file/permissions",
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => [
        "Authorization: Bearer $token",
        'Content-Type: application/json'
    ],
    CURLOPT_POSTFIELDS => json_encode([
        'role' => 'reader',
        'type' => 'anyone'
    ])
]);

$result = curl_exec($curl);
curl_close($curl);

var_dump($result);

But I’m getting this error:

The permission type field is required.

I’ve reviewed the API documents and my code seems correct. Could someone point out what might be wrong? Is the issue with the API itself? Any assistance would be appreciated!

2

I’ve encountered similar issues with the Google Drive API before. The error you’re getting suggests there might be a problem with how the API is interpreting your request. Here’s what worked for me:

Try changing your CURLOPT_POSTFIELDS to include ‘sendNotificationEmail’ set to false. This sometimes resolves permission-related errors:

CURLOPT_POSTFIELDS => json_encode([
    'role' => 'reader',
    'type' => 'anyone',
    'sendNotificationEmail' => false
])

Also, double-check that your access token has the necessary scope for managing file permissions. You might need to request the ‘https://www.googleapis.com/auth/drive.file’ scope when obtaining the token.

If these suggestions don’t work, consider using Google’s official PHP client library instead of cURL. It handles a lot of the low-level details and can be more reliable for complex operations like permission management.

3

I’ve dealt with similar permission issues using the Google Drive API. One thing that often trips people up is the API version. You’re using v3, which is correct, but sometimes the documentation lags behind the actual implementation.

Have you tried explicitly setting the ‘role’ and ‘type’ fields in the URL parameters? Like this:

CURLOPT_URL => "https://www.googleapis.com/drive/v3/files/$file/permissions?role=reader&type=anyone",

Also, make sure your access token hasn’t expired. These tokens typically have a short lifespan, so you might need to refresh it before making the API call.

If all else fails, you could try using the Google_Service_Drive class from the Google API Client Library for PHP. It abstracts away a lot of the complexities of working with cURL directly and might resolve your issue.

4

hey, i had similar issues. try adding ‘emailAddress’ field to ur CURLOPT_POSTFIELDS:

CURLOPT_POSTFIELDS => json_encode([
    'role' => 'reader',
    'type' => 'user',
    'emailAddress' => '[email protected]'
])

this worked 4 me. also, make sure ur using the latest API version. good luck!