Dart

Amazon Glacier Get Vault Access Policy

See more Amazon Glacier Examples

Demonstrates how to retrieve the access-policy subresource set on the vault Dart

import 'package:chilkat/chilkat.dart';

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

  final rest = CkRest();

  // Connect to the Amazon AWS REST server in the desired region.
  final bTls = true;
  final port = 443;
  final bAutoReconnect = true;
  rest.connect('glacier.us-west-2.amazonaws.com', port, bTls, bAutoReconnect);

  // Provide AWS credentials.
  final authAws = CkAuthAws();
  authAws.accessKey = 'AWS_ACCESS_KEY';
  authAws.secretKey = 'AWS_SECRET_KEY';
  authAws.serviceName = 'glacier';
  authAws.region = 'us-west-2';

  rest.setAuthAws(authAws);

  // --------------------------------------------------------------------------
  // Note: The above REST connection and setup of the AWS credentials
  // can be done once.  After connecting, any number of REST calls can be made.
  // The "auto reconnect" property passed to rest.Connect indicates that if
  // the connection is lost, a REST method call will automatically reconnect
  // if needed.
  // --------------------------------------------------------------------------

  // For more information, see Glacier Get Vault Access Policy Reference Documentation
  // 
  rest.addHeader('x-amz-glacier-version', '2012-06-01');

  // Get the access policy for the "chilkat" vault.
  final sbResponseBody = CkStringBuilder();
  try {
    rest.fullRequestNoBodySb('GET', '/AWS_ACCOUNT_ID/vaults/chilkat/access-policy', sbResponseBody);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final respStatusCode = rest.responseStatusCode;
  if (respStatusCode >= 400) {
    print('Response Status Code = $respStatusCode');
    print('Response Header:');
    print(rest.responseHeader);
    print('Response Body:');
    print(sbResponseBody.getAsString());
    return;
  }

  // Success is indicated by a 200 response status.
  print('response status code = $respStatusCode');

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

  // Returns JSON such as this:
  // {
  //   "Policy": "{\"Version\":\"2012-10-17\",\"Statement\":[{\"Sid\":\"Define-owner-access-rights\",\"Effect\":\"Allow\",\"Principal\":{\"AWS\":\"arn:aws:iam::9999999999999:root\"},\"Action\":\"glacier:DeleteArchive\",\"Resource\":\"arn:aws:glacier:us-west-2:9999999999999:vaults/chilkat\"}]}"
  // }

  // Unwrap...
  final jsonPolicy = CkJsonObject();
  jsonPolicy.load(json.stringOf('Policy'));
  jsonPolicy.emitCompact = false;

  print(jsonPolicy.emit());
  print('----');

  // The jsonPolicy contains:

  // {
  //   "Version": "2012-10-17",
  //   "Statement": [
  //     {
  //       "Sid": "Define-owner-access-rights",
  //       "Effect": "Allow",
  //       "Principal": {
  //         "AWS": "arn:aws:iam::9999999999999:root"
  //       },
  //       "Action": "glacier:DeleteArchive",
  //       "Resource": "arn:aws:glacier:us-west-2:9999999999999:vaults/chilkat"
  //     }
  //   ]
  // }
  // 

  // Use this online tool to generate parsing code from sample JSON: 
  // Generate Parsing Code from JSON

  // To parse the above contents of jsonPolicy...
  var i = 0;
  var sid = '';
  var effect = '';
  var principalAWS = '';
  var action = '';
  var resource = '';

  final version = jsonPolicy.stringOf('Version');
  i = 0;
  final countI = jsonPolicy.sizeOfArray('Statement');
  while (i < countI) {
    jsonPolicy.i = i;
    sid = jsonPolicy.stringOf('Statement[i].Sid');
    effect = jsonPolicy.stringOf('Statement[i].Effect');
    principalAWS = jsonPolicy.stringOf('Statement[i].Principal.AWS');
    action = jsonPolicy.stringOf('Statement[i].Action');
    resource = jsonPolicy.stringOf('Statement[i].Resource');
    i++;
  }
}