Delphi DLL

OSS List Buckets (Alibaba Cloud)

See more Alibaba Cloud OSS Examples

Demonstrates how to list AliCloud OSS buckets.

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

Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Xml, Http;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
bucketsXml: PWideChar;
xml: HCkXml;
CreationDate: PWideChar;
ExtranetEndpoint: PWideChar;
IntranetEndpoint: PWideChar;
Location: PWideChar;
Name: PWideChar;
Region: PWideChar;
StorageClass: PWideChar;
ListAllMyBucketsResult_xmlns: PWideChar;
ID: PWideChar;
DisplayName: PWideChar;
i: Integer;
count_i: Integer;

begin
success := False;

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

http := CkHttp_Create();

// Insert your AccessKey ID here:
CkHttp_putAwsAccessKey(http,'access-key');

// Insert your AccessKey Secret here:
CkHttp_putAwsSecretKey(http,'secret-key');

// See Alibaba Object Storage Service Regions and Endpoints
CkHttp_putAwsEndpoint(http,'oss-us-west-1.aliyuncs.com');

bucketsXml := CkHttp__s3_ListBuckets(http);

if (CkHttp_getLastMethodSuccess(http) <> True) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

xml := CkXml_Create();
CkXml_LoadXml(xml,bucketsXml);
Memo1.Lines.Add(CkXml__getXml(xml));

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

// Sample output:

// <?xml version="1.0" encoding="UTF-8"?>
// <ListAllMyBucketsResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
//     <Owner>
//         <ID>5035535379748121</ID>
//         <DisplayName>5035535379748121</DisplayName>
//     </Owner>
//     <Buckets>
//         <Bucket>
//             <Comment/>
//             <CreationDate>2021-10-28T21:30:56.000Z</CreationDate>
//             <ExtranetEndpoint>oss-us-east-1.aliyuncs.com</ExtranetEndpoint>
//             <IntranetEndpoint>oss-us-east-1-internal.aliyuncs.com</IntranetEndpoint>
//             <Location>oss-us-east-1</Location>
//             <Name>chilkat</Name>
//             <Region>us-east-1</Region>
//             <StorageClass>STANDARD</StorageClass>
//         </Bucket>
//         <Bucket>
//             <Comment/>
//             <CreationDate>2021-10-29T00:12:54.000Z</CreationDate>
//             <ExtranetEndpoint>oss-us-west-1.aliyuncs.com</ExtranetEndpoint>
//             <IntranetEndpoint>oss-us-west-1-internal.aliyuncs.com</IntranetEndpoint>
//             <Location>oss-us-west-1</Location>
//             <Name>chilkat-testbucket</Name>
//             <Region>us-west-1</Region>
//             <StorageClass>STANDARD</StorageClass>
//         </Bucket>
//         <Bucket>
//             <Comment/>
//             <CreationDate>2021-10-28T23:52:10.000Z</CreationDate>
//             <ExtranetEndpoint>oss-us-west-1.aliyuncs.com</ExtranetEndpoint>
//             <IntranetEndpoint>oss-us-west-1-internal.aliyuncs.com</IntranetEndpoint>
//             <Location>oss-us-west-1</Location>
//             <Name>chilkat2</Name>
//             <Region>us-west-1</Region>
//             <StorageClass>STANDARD</StorageClass>
//         </Bucket>
//     </Buckets>
// </ListAllMyBucketsResult>

ListAllMyBucketsResult_xmlns := CkXml__getAttrValue(xml,'xmlns');
ID := CkXml__getChildContent(xml,'Owner|ID');
DisplayName := CkXml__getChildContent(xml,'Owner|DisplayName');
i := 0;
count_i := CkXml_NumChildrenHavingTag(xml,'Buckets|Bucket');
while i < count_i do
  begin
    CkXml_putI(xml,i);
    CreationDate := CkXml__getChildContent(xml,'Buckets|Bucket[i]|CreationDate');
    ExtranetEndpoint := CkXml__getChildContent(xml,'Buckets|Bucket[i]|ExtranetEndpoint');
    IntranetEndpoint := CkXml__getChildContent(xml,'Buckets|Bucket[i]|IntranetEndpoint');
    Location := CkXml__getChildContent(xml,'Buckets|Bucket[i]|Location');
    Name := CkXml__getChildContent(xml,'Buckets|Bucket[i]|Name');
    Region := CkXml__getChildContent(xml,'Buckets|Bucket[i]|Region');
    StorageClass := CkXml__getChildContent(xml,'Buckets|Bucket[i]|StorageClass');
    i := i + 1;
  end;

CkHttp_Dispose(http);
CkXml_Dispose(xml);

end;