(Delphi ActiveX) S3 List Bucket Objects (using Chilkat REST)

Demonstrates how to fetch a list of objects in an S3 bucket.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
rest: TChilkatRest;
bTls: Integer;
port: Integer;
bAutoReconnect: Integer;
success: Integer;
authAws: TChilkatAuthAws;
sbResponse: TChilkatStringBuilder;
statusCode: Integer;
xml: TChilkatXml;
Key: WideString;
LastModified: WideString;
ETag: WideString;
SizeDecimalStr: WideString;
ID: WideString;
DisplayName: WideString;
StorageClass: WideString;
Name: WideString;
MaxKeys: Integer;
IsTruncated: WideString;
i: Integer;
count_i: Integer;

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

rest := TChilkatRest.Create(Self);

// Connect to the Amazon AWS REST server.
bTls := 1;
port := 443;
bAutoReconnect := 1;
success := rest.Connect('s3.amazonaws.com',port,bTls,bAutoReconnect);

// ----------------------------------------------------------------------------
// Important: For buckets created in regions outside us-east-1,
// there are three important changes that need to be made.
// See Working with S3 Buckets in Non-us-east-1 Regions for the details.
// ----------------------------------------------------------------------------

// Provide AWS credentials for the REST call.
authAws := TChilkatAuthAws.Create(Self);
authAws.AccessKey := 'AWS_ACCESS_KEY';
authAws.SecretKey := 'AWS_SECRET_KEY';
authAws.ServiceName := 's3';
success := rest.SetAuthAws(authAws.ControlInterface);

//  Set the bucket name via the HOST header.
//  In this case, the bucket name is "chilkat100".
rest.Host := 'chilkat100.s3.amazonaws.com';

sbResponse := TChilkatStringBuilder.Create(Self);
success := rest.FullRequestNoBodySb('GET','/',sbResponse.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

statusCode := rest.ResponseStatusCode;
Memo1.Lines.Add('Response status code = ' + IntToStr(statusCode));

xml := TChilkatXml.Create(Self);
xml.LoadSb(sbResponse.ControlInterface,1);
Memo1.Lines.Add(xml.GetXml());

if (statusCode <> 200) then
  begin
    Memo1.Lines.Add('Failed.  See error information in the XML.');
    Exit;
  end;

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

Name := xml.GetChildContent('Name');
MaxKeys := xml.GetChildIntValue('MaxKeys');
IsTruncated := xml.GetChildContent('IsTruncated');
i := 0;
count_i := xml.NumChildrenHavingTag('Contents');
while i < count_i do
  begin
    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');
    ID := xml.GetChildContent('Contents[i]|Owner|ID');
    DisplayName := xml.GetChildContent('Contents[i]|Owner|DisplayName');
    StorageClass := xml.GetChildContent('Contents[i]|StorageClass');
    i := i + 1;
  end;
end;