(Delphi ActiveX) Amazon Glacier Upload Archive from In-Memory Data

Demonstrates how to add an archive to a vault from data in memory.

Note: This example requires Chilkat v9.5.0.78 or greater.

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;
bd: TChilkatBinData;
crypt: TChilkatCrypt2;
treeHashHex: WideString;
linearHashHex: WideString;
sbResponseBody: TChilkatStringBuilder;
respStatusCode: Integer;
archiveId: WideString;
location: WideString;

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 in the desired region.
bTls := 1;
port := 443;
bAutoReconnect := 1;
success := rest.Connect('glacier.us-west-2.amazonaws.com',port,bTls,bAutoReconnect);

// Provide AWS credentials.
authAws := TChilkatAuthAws.Create(Self);
authAws.AccessKey := 'AWS_ACCESS_KEY';
authAws.SecretKey := 'AWS_SECRET_KEY';
authAws.ServiceName := 'glacier';
authAws.Region := 'us-west-2';

success := rest.SetAuthAws(authAws.ControlInterface);

// --------------------------------------------------------------------------
// Note: The above REST connection and setup of the AWS credentials
// can be done once.  After connecting, any number of REST calls can be made.
// The "auto reconnect" property passed to rest.Connect indicates that if
// the connection is lost, a REST method call will automatically reconnect
// if needed.
// --------------------------------------------------------------------------

// Load the data to be uploaded.
bd := TChilkatBinData.Create(Self);
success := bd.LoadFile('qa_data/jpg/penguins.jpg');
// (The point here is that the contents of the bd don't necessarily have to come from a file.)

// 
// For more information, see Glacier Upload Archive Reference Documentation
// 
rest.AddHeader('x-amz-glacier-version','2012-06-01');

// We'll need to pre-compute the SHA256 tree hash and the SHA256 linear hash.
// The hashes are added in the following request headers:

// x-amz-sha256-tree-hash: SHA256 tree hash
// x-amz-content-sha256: SHA256 linear hash

crypt := TChilkatCrypt2.Create(Self);
crypt.HashAlgorithm := 'sha256-tree-hash';
crypt.EncodingMode := 'hexlower';
treeHashHex := crypt.HashBdENC(bd.ControlInterface);
rest.AddHeader('x-amz-sha256-tree-hash',treeHashHex);

crypt.HashAlgorithm := 'sha256';
linearHashHex := crypt.HashBdENC(bd.ControlInterface);
authAws.PrecomputedSha256 := linearHashHex;

// We can optionally add a description
rest.AddHeader('x-amz-archive-description','Penguins JPG');

sbResponseBody := TChilkatStringBuilder.Create(Self);
success := rest.FullRequestBd('POST','/AWS_ACCOUNT_ID/vaults/chilkat/archives',bd.ControlInterface,sbResponseBody.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

respStatusCode := rest.ResponseStatusCode;
if (respStatusCode >= 400) then
  begin
    Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(rest.ResponseHeader);
    Memo1.Lines.Add('Response Body:');
    Memo1.Lines.Add(sbResponseBody.GetAsString());
    Exit;
  end;

// Success is indicated by a 201 response status with an empty response body.
Memo1.Lines.Add('response status code = ' + IntToStr(respStatusCode));

// If successful, the response header looks like this.
// The Location and x-amz-archive-id are two items of information we may wish to save..

// HTTP/1.1 201 Created
// x-amzn-RequestId: AAABZpJrTyioDC_HsOmHae8EZp_uBSJr6cnGOLKp_XJCl-Q
// Date: Wed, 10 Feb 2017 12:00:00 GMT
// x-amz-sha256-tree-hash: beb0fe31a1c7ca8c6c04d574ea906e3f97b31fdca7571defb5b44dca89b5af60
// Location: /111122223333/vaults/examplevault/archives/NkbByEejwEggmBz2fTH ... GlqrEXAMPLEArchiveId
// x-amz-archive-id: NkbByEejwEggmBz2fTHgJrg0XBoDfjP4q6iu87-TjhqG6eGoOY9Z8i1_AUyUsu ... BfGlqrEXAMPLEArchiveId
// 

archiveId := rest.ResponseHdrByName('x-amz-archive-id');
Memo1.Lines.Add('x-amz-archive-id = ' + archiveId);

location := rest.ResponseHdrByName('Location');
Memo1.Lines.Add('Location = ' + location);
end;