如何使用 PHP 为谷歌云存储对象生成签名 URL

The method i tried using was with openssl

$fp = fopen($key, 'r');  //open the PEM file
$priv_key = fread($fp,8192);
fclose($fp);
$pkeyid = openssl_get_privatekey($priv_key,"password");

openssl_sign($response["data_to_sign"], $signature, $pkeyid,'sha256');

$sign = base64_encode($signature)

Is this the correct Method to generate signature for signed urls in google?

解决方案

You can try Google Cloud Storage PHP SDK, it's a good choice for keeping your codes clean.

cloud-storage PHP SDK

Install package to your project by following this page on Packagist, then

function getSignedGcsUrl($objPath/* which is your target object path */, $duration = 50) 
{
    $storageClient = new StorageClient([
        'projectId' => /* your gcp projectId here */,
        'keyFilePath' => /* your gcp keyFilePath here */,
    ]);
    $bucket = $storageClient->bucket($objPath);
    $object = $bucket->object();
    $url = $object->signedUrl(new DateTime('+ ' . $duration . ' seconds'));
    return $url;
}

laravel-google-cloud-storage (for Laravel)

Install and configurate superbalist/laravel-google-cloud-storage by following this page: on Github, then

public static function getSignedGcsUrl($objPath, $duration = 50)
{
    return Storage::disk('gcs'/* following your filesystem configuration */)
        ->getAdapter()
        ->getBucket()
        ->object($objPath)
        ->signedUrl(new DateTime('+ ' . $duration . ' seconds'));
}