Delphi DLL

Wasabi List Bucket Objects

See more Wasabi Examples

Demonstrates how to download and parse XML for the list of objects in a bucket. 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;
bucketName: PWideChar;
strXml: PWideChar;
xml: HCkXml;
Key: PWideChar;
LastModified: PWideChar;
ETag: PWideChar;
SizeDecimalStr: PWideChar;
ID: PWideChar;
DisplayName: PWideChar;
StorageClass: PWideChar;
ListBucketResult_xmlns: PWideChar;
Name: PWideChar;
MaxKeys: Integer;
IsTruncated: PWideChar;
i: Integer;
count_i: Integer;

begin
success := False;

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

http := CkHttp_Create();

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

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

// Use the endpoint matching the bucket's region.
CkHttp_putAwsEndpoint(http,'s3.us-west-1.wasabisys.com');

bucketName := 'chilkattest';

strXml := CkHttp__s3_ListBucketObjects(http,bucketName);
if (CkHttp_getLastMethodSuccess(http) <> True) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

Memo1.Lines.Add('Response status code = ' + IntToStr(CkHttp_getLastStatus(http)));

xml := CkXml_Create();
success := CkXml_LoadXml(xml,strXml);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkXml__lastErrorText(xml));
    Exit;
  end;

// If the response status code was not 200, then the XML response is not a 
// listing of objects, but instead contains error information.
if (CkHttp_getLastStatus(http) <> 200) then
  begin
    Memo1.Lines.Add(CkXml__getXml(xml));
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

// A sample response is shown below.
Memo1.Lines.Add(CkXml__getXml(xml));
Memo1.Lines.Add('----');

// 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>chilkattest</Name>
//     <Prefix/>
//     <Marker/>
//     <MaxKeys>1000</MaxKeys>
//     <IsTruncated>false</IsTruncated>
//     <Contents>
//         <Key>orchard.json</Key>
//         <LastModified>2021-10-27T22:58:49.000Z</LastModified>
//         <ETag>&quot;303fb46cf341094fef6274b7789cd6aa&quot;</ETag>
//         <Size>22</Size>
//         <Owner>
//             <ID>1039F31570DBC320E89D391632FCA06FE6D10CBB2ADBD0BF6439BB1DA0C3FAD6</ID>
//             <DisplayName>admin</DisplayName>
//         </Owner>
//         <StorageClass>STANDARD</StorageClass>
//     </Contents>
//     <Contents>
//         <Key>seahorse.jpg</Key>
//         <LastModified>2021-10-27T22:35:29.000Z</LastModified>
//         <ETag>&quot;a8551f0a5437f43a796fca7623ee9232&quot;</ETag>
//         <Size>24388</Size>
//         <Owner>
//             <ID>1039F31570DBC320E89D391632FCA06FE6D10CBB2ADBD0BF6439BB1DA0C3FAD6</ID>
//             <DisplayName>admin</DisplayName>
//         </Owner>
//         <StorageClass>STANDARD</StorageClass>
//     </Contents>
//     <Contents>
//         <Key>seahorse2.jpg</Key>
//         <LastModified>2021-10-27T22:03:51.000Z</LastModified>
//         <ETag>&quot;a8551f0a5437f43a796fca7623ee9232&quot;</ETag>
//         <Size>24388</Size>
//         <Owner>
//             <ID>1039F31570DBC320E89D391632FCA06FE6D10CBB2ADBD0BF6439BB1DA0C3FAD6</ID>
//             <DisplayName>admin</DisplayName>
//         </Owner>
//         <StorageClass>STANDARD</StorageClass>
//     </Contents>
// </ListBucketResult>

ListBucketResult_xmlns := CkXml__getAttrValue(xml,'xmlns');
Name := CkXml__getChildContent(xml,'Name');
MaxKeys := CkXml_GetChildIntValue(xml,'MaxKeys');
IsTruncated := CkXml__getChildContent(xml,'IsTruncated');
i := 0;
count_i := CkXml_NumChildrenHavingTag(xml,'Contents');
while i < count_i do
  begin
    CkXml_putI(xml,i);
    Key := CkXml__getChildContent(xml,'Contents[i]|Key');
    LastModified := CkXml__getChildContent(xml,'Contents[i]|LastModified');
    ETag := CkXml__getChildContent(xml,'Contents[i]|ETag');
    SizeDecimalStr := CkXml__getChildContent(xml,'Contents[i]|Size');
    ID := CkXml__getChildContent(xml,'Contents[i]|Owner|ID');
    DisplayName := CkXml__getChildContent(xml,'Contents[i]|Owner|DisplayName');
    StorageClass := CkXml__getChildContent(xml,'Contents[i]|StorageClass');
    Memo1.Lines.Add(IntToStr(i) + ': ' + Key);
    i := i + 1;
  end;

CkHttp_Dispose(http);
CkXml_Dispose(xml);

end;