Pascal (Lazarus/Delphi)

Glacier Upload Archive

See more Amazon Glacier Examples

Demonstrates how to add an archive to a vault. For a successful upload, your data is durably persisted. In response, Amazon S3 Glacier (Glacier) returns the archive ID in the x-amz-archive-id header of the response. You should save the archive ID returned so that you can access the archive later.

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.Stream,
  Chilkat.Crypt2;

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

procedure RunDemo;
var
  success: Boolean;
  rest: TRest;
  bTls: Boolean;
  port: Integer;
  bAutoReconnect: Boolean;
  authAws: TAuthAws;
  filePath: string;
  crypt: TCrypt2;
  treeHashHex: string;
  linearHashHex: string;
  fileStream: TStream;
  responseStr: string;
  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.
  //  --------------------------------------------------------------------------

  //  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

  //  The file we'll be uploading
  filePath := 'qa_data/zips/somethingBig.zip';

  crypt := TCrypt2.Create;
  crypt.HashAlgorithm := 'sha256-tree-hash';
  crypt.EncodingMode := 'hexlower';
  treeHashHex := crypt.HashFileENC(filePath);
  rest.AddHeader('x-amz-sha256-tree-hash',treeHashHex);

  crypt.HashAlgorithm := 'sha256';
  linearHashHex := crypt.HashFileENC(filePath);
  authAws.PrecomputedSha256 := linearHashHex;

  //  We can optionally add a description
  //  In this case, we'll set the description equal to the local filepath of the file we're uploading.
  rest.AddHeader('x-amz-archive-description',filePath);

  //  Upload the file to the vault named "chilkat"
  fileStream := TStream.Create;
  fileStream.SourceFile := filePath;

  //  May need to increase the timeout if this is a really large file..
  rest.IdleTimeoutMs := 120000;

  //   Add an Expect: 100-continue request header
  rest.AddHeader('Expect','100-continue');

  responseStr := rest.FullRequestStream('POST','/AWS_ACCOUNT_ID/vaults/chilkat/archives',fileStream);
  if (rest.LastMethodSuccess <> 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(responseStr);
      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;
  crypt.Free;
  fileStream.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.