Dart

OSS List Bucket Objects (Alibaba Cloud)

See more Alibaba Cloud OSS Examples

Demonstrates how to list the objects in a bucket.

The Chilkat S3 functions in the HTTP class are compatible with Alibaba Cloud's OSS service.

Dart

import 'package:chilkat/chilkat.dart';

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

  final http = CkHttp();

  // Insert your AccessKey ID here:
  http.awsAccessKey = 'access-key';

  // Insert your AccessKey Secret here:
  http.awsSecretKey = 'secret-key';

  // To list objects in a bucket located in a different region, use the endpoint for that region, such as "oss-cn-hangzhou.aliyuncs.com 	"
  // See Alibaba Object Storage Service Regions and Endpoints
  http.awsEndpoint = 'oss-us-east-1.aliyuncs.com';

  final bucketName = 'chilkat';

  final String strXml;
  try {
    strXml = http.s3ListBucketObjects(bucketName);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Response status code = ${http.lastStatus}');

  final xml = CkXml();
  try {
    xml.loadXml(strXml);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // If the response status code was not 200, then the XML response is not a 
  // listing of objects, but instead contains error information.
  if (http.lastStatus != 200) {
    print(xml.getXml());
    print('Failed.');
    return;
  }

  // A sample response is shown below.
  print(xml.getXml());
  print('----');

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

  // <?xml version="1.0" encoding="UTF-8"?>
  // <ListBucketResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
  //     <Name>chilkat</Name>
  //     <Prefix/>
  //     <Marker/>
  //     <MaxKeys>1000</MaxKeys>
  //     <IsTruncated>false</IsTruncated>
  //     <Contents>
  //         <Key>orchard.json</Key>
  //         <LastModified>2021-10-29T16:58:12.000Z</LastModified>
  //         <ETag>"303FB46CF341094FEF6274B7789CD6AA"</ETag>
  //         <Size>22</Size>
  //         <StorageClass>STANDARD</StorageClass>
  //         <Owner>
  //             <ID>5035535379748121</ID>
  //             <DisplayName>5035535379748121</DisplayName>
  //         </Owner>
  //     </Contents>
  //     <Contents>
  //         <Key>seahorse.jpg</Key>
  //         <LastModified>2021-10-29T16:52:01.000Z</LastModified>
  //         <ETag>"A8551F0A5437F43A796FCA7623EE9232"</ETag>
  //         <Size>24388</Size>
  //         <StorageClass>STANDARD</StorageClass>
  //         <Owner>
  //             <ID>5035535379748121</ID>
  //             <DisplayName>5035535379748121</DisplayName>
  //         </Owner>
  // 
  //     </Contents>
  // </ListBucketResult>

  var key = '';
  var lastModified = '';
  var eTag = '';
  var sizeDecimalStr = '';
  var storageClass = '';
  var id = '';
  var displayName = '';

  final listBucketResultXmlns = xml.getAttrValue('xmlns');
  final name = xml.getChildContent('Name');
  final maxKeys = xml.getChildIntValue('MaxKeys');
  final isTruncated = xml.getChildContent('IsTruncated');
  var i = 0;
  final countI = xml.numChildrenHavingTag('Contents');
  while (i < countI) {
    xml.i = i;
    key = xml.getChildContent('Contents[i]|Key');
    lastModified = xml.getChildContent('Contents[i]|LastModified');
    eTag = xml.getChildContent('Contents[i]|ETag');
    sizeDecimalStr = xml.getChildContent('Contents[i]|Size');
    storageClass = xml.getChildContent('Contents[i]|StorageClass');
    id = xml.getChildContent('Contents[i]|Owner|ID');
    displayName = xml.getChildContent('Contents[i]|Owner|DisplayName');
    i++;
  }
}