Pascal (Lazarus/Delphi)

Amazon Glacier Upload Archive from In-Memory Data

See more Amazon Glacier Examples

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

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

Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.AuthAws,
  Chilkat.Rest,
  Chilkat.BinData,
  Chilkat.StringBuilder,
  Chilkat.Crypt2;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  rest: TRest;
  bTls: Boolean;
  port: Integer;
  bAutoReconnect: Boolean;
  authAws: TAuthAws;
  bd: TBinData;
  crypt: TCrypt2;
  treeHashHex: string;
  linearHashHex: string;
  sbResponseBody: TStringBuilder;
  respStatusCode: Integer;
  archiveId: string;
  location: string;

begin
  success := False;

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

  rest := TRest.Create;

  //  Connect to the Amazon AWS REST server in the desired region.
  bTls := True;
  port := 443;
  bAutoReconnect := True;
  success := rest.Connect('glacier.us-west-2.amazonaws.com',port,bTls,bAutoReconnect);

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

  success := rest.SetAuthAws(authAws);

  //  --------------------------------------------------------------------------
  //  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 := TBinData.Create;
  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 := TCrypt2.Create;
  crypt.HashAlgorithm := 'sha256-tree-hash';
  crypt.EncodingMode := 'hexlower';
  treeHashHex := crypt.HashBdENC(bd);
  rest.AddHeader('x-amz-sha256-tree-hash',treeHashHex);

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

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

  sbResponseBody := TStringBuilder.Create;
  success := rest.FullRequestBd('POST','/AWS_ACCOUNT_ID/vaults/chilkat/archives',bd,sbResponseBody);
  if (success <> True) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

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

  //  Success is indicated by a 201 response status with an empty response body.
  WriteLn('response status code = ' + 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');
  WriteLn('x-amz-archive-id = ' + archiveId);

  location := rest.ResponseHdrByName('Location');
  WriteLn('Location = ' + location);


  rest.Free;
  authAws.Free;
  bd.Free;
  crypt.Free;
  sbResponseBody.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.