Delphi DLL

Backblaze S3 List Buckets

See more Backblaze S3 Examples

Demonstrates how to list Backblaze buckets.

The Chilkat S3 functions in the HTTP class are compatible with the Backblaze service. However, because of some specific issues, Chilkat v9.5.0.89 or later is needed.

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;
Name: PWideChar;
CreationDate: PWideChar;
ListAllMyBucketsResult_xmlns: PWideChar;
ID: 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();

// keyID = Access Key ID or Access Key
CkHttp_putAwsAccessKey(http,'access-key');

// applicationKey = Secret Access Key or Secret Key
CkHttp_putAwsSecretKey(http,'secret-key');

// Region is the 2nd part of your S3 Endpoint
CkHttp_putAwsEndpoint(http,'s3.us-west-002.backblazeb2.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" standalone="yes"?>
// <ListAllMyBucketsResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
//     <Owner>
//         <ID>f2ebbc5f792c</ID>
//         <DisplayName/>
//     </Owner>
//     <Buckets>
//         <Bucket>
//             <Name>chilkat</Name>
//             <CreationDate>2021-10-30T14:17:30.004Z</CreationDate>
//         </Bucket>
//         <Bucket>
//             <Name>chilkat-test</Name>
//             <CreationDate>2021-10-30T14:25:52.556Z</CreationDate>
//         </Bucket>
//     </Buckets>
// </ListAllMyBucketsResult>

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

CkHttp_Dispose(http);
CkXml_Dispose(xml);

end;