(PHP ActiveX) Manage Cloud Storage Bucket Labels

See more Google Cloud Storage Examples

Demonstrates how to add, update, and delete labels for a Cloud Storage bucket.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?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..
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder')
$sbToken = new COM("Chilkat.StringBuilder");
$sbToken->LoadFile('qa_data/tokens/googleCloudStorageAccessToken.txt','utf-8');

// ---- Step 1
// Create the JSON body of the PATCH request that will be sent.
// This specifies labels to be added, updated, and/or deleted.
// (To delete a label, set its value equal to null.)

// {
//   "labels": {
//     "new_label_key": "new_label_value",
//     "existing_label_key": "updated_label_value",
//     "old_label_key": null
//   }
// }

// ---------
// Important
// ---------
// You can apply multiple labels to each bucket, with a maximum of 64 labels per bucket.

//     - Keys and values cannot be longer than 63 characters each.
//     - Keys and values can only contain lowercase letters, numeric characters, underscores, and dashes. International characters are allowed.
//     - Label keys must start with a lowercase letter and international characters are allowed.
//     - Label keys cannot be empty.

// Build JSON to update labels.
// 
// During the testing of this example, my bucket already has the following labels:
// {
//  "labels": {
//   "test1": "xyz",
//   "test": "abc",
//   "a": "abc"
//  }
// }

// For this example, I'm going to add a label "b", delete the label "test1", and update
// the label "test".
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$json = new COM("Chilkat.JsonObject");
$json->UpdateString('labels.b','bbb');
$json->UpdateString('labels.test','abc123');
$json->UpdateNull('labels.test1');

// ---- Step 2
// Send a PATCH equivalent to this curl command

// curl -X PATCH --data-binary @[JSON_FILE_NAME].json \
//     -H "Authorization: Bearer [OAUTH2_TOKEN]" \
//     -H "Content-Type: application/json" \
//     "https://www.googleapis.com/storage/v1/b/[BUCKET_NAME]?fields=labels"

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Http')
$http = new COM("Chilkat.Http");
$http->AuthToken = $sbToken->getAsString();

$http->SetUrlVar('bucket_name','chilkat-ocean');
$url = 'https://www.googleapis.com/storage/v1/b/{$bucket_name}?fields=labels';
// resp is a Chilkat.HttpResponse
$resp = $http->PText('PATCH',$url,$json->emit(),'utf-8','application/json',0,0);
if ($http->LastMethodSuccess == 0) {
    print $http->LastErrorText . "\n";
    exit;
}

$responseCode = $resp->StatusCode;
if ($responseCode == 401) {
    print $resp->BodyStr . "\n";
    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";

    exit;
}

// Note: A 400 response code is likely caused by illegal characters used for a label name and/or value.

print 'Response code: ' . $responseCode . "\n";
print 'Response body' . "\n";
print $resp->BodyStr . "\n";

// A response code = 200 indicates success, and the response body contains the JSON
// for the new/updated set of labels
// Response code: 200
// Response body
// {
//  "labels": {
//   "test": "abc123",
//   "a": "abc",
//   "b": "bbb"
//  }
// }


?>