(PHP Extension) Download Object from Google Cloud Storage

Demonstrates how to download an object from Google Cloud Storage to a file.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// This example uses a previously obtained access token having permission for the 
// scope "https://www.googleapis.com/auth/cloud-platform"

// In this example, Get Google Cloud Storage OAuth2 Access Token, 
// the service account access token was saved to a text file.  This example fetches the access token from the file..
$sbToken = new CkStringBuilder();
$sbToken->LoadFile('qa_data/tokens/googleCloudStorageAccessToken.txt','utf-8');

// Send a GET equivalent to this curl command.

// curl -X GET \
//     -H "Authorization: Bearer [OAUTH2_TOKEN]" \
//     -o "[SAVE_TO_LOCATION]" \
//     "https://www.googleapis.com/storage/v1/b/[BUCKET_NAME]/o/[OBJECT_NAME]?alt=media"

$http = new CkHttp();

$http->put_AuthToken($sbToken->getAsString());

// Construct a URL to download an object named "starfish.jpg" from the "chilkat-ocean" bucket.
$http->SetUrlVar('bucket_name','chilkat-ocean');
$http->SetUrlVar('object_name','starfish.jpg');
$url = 'https://www.googleapis.com/storage/v1/b/{$bucket_name}/o/{$object_name}?alt=media';

// If there is an error response, then we didn't actually download the file data,
// but instead we downloaded an error response..
$fileData = new CkBinData();
$success = $http->DownloadBd($url,$fileData);
if ($success == false) {
    print $http->lastErrorText() . "\n";
    exit;
}

$sbErrorResponse = new CkStringBuilder();
$responseCode = $http->get_LastStatus();
if ($responseCode == 401) {
    print 'If invalid credentials, then it is likely the access token expired.' . "\n";
    print 'Your app should automatically fetch a new access token and re-try.' . "\n";
}

if ($responseCode != 200) {
    // Get the error response
    $sbErrorResponse->AppendBd($fileData,'utf-8',0,0);
    print 'Error response code = ' . $responseCode . "\n";
    print 'Error:' . "\n";
    print $sbErrorResponse->getAsString() . "\n";
    exit;
}

print 'Success.' . "\n";

// Save the downloaded data to a file.
$success = $fileData->WriteFile('qa_output/starfish.jpg');

?>