Dart

Google Cloud Storage: Update Object Metadata

See more Google Cloud Storage Examples

Demonstrates how to update (edit) the metadata associated with an object in a Google Cloud Storage bucket. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example assumes the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final http = CkHttp();

  // Implements the following CURL command:

  // curl -X PATCH --data-binary @JSON_FILE_NAME \
  //   -H "Authorization: Bearer OAUTH2_TOKEN" \
  //   -H "Content-Type: application/json" \
  //   "https://storage.googleapis.com/storage/v1/b/BUCKET_NAME/o/OBJECT_NAME"

  // Use the following online tool to generate HTTP code from a CURL command
  // Convert a cURL Command to HTTP Source Code

  final bdRequestBody = CkBinData();
  try {
    bdRequestBody.loadFile('JSON_FILE_PATH');
  } on ChilkatException {
    print('Failed to load JSON_FILE_PATH');
    return;
  }

  // Adds the "Authorization: Bearer OAUTH2_TOKEN" header.
  http.authToken = 'OAUTH2_TOKEN';

  final resp = CkHttpResponse();
  try {
    http.httpBd('PATCH', 'https://storage.googleapis.com/storage/v1/b/BUCKET_NAME/o/OBJECT_NAME', bdRequestBody, 'application/json', resp);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final sbResponseBody = CkStringBuilder();
  resp.getBodySb(sbResponseBody);

  final jResp = CkJsonObject();
  jResp.loadSb(sbResponseBody);
  jResp.emitCompact = false;

  print('Response Body:');
  print(jResp.emit());

  final respStatusCode = resp.statusCode;
  print('Response Status Code = $respStatusCode');
  if (respStatusCode >= 400) {
    print('Response Header:');
    print(resp.header);
    print('Failed.');
    return;
  }
}