Delphi DLL

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.

Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, AuthAws, Rest, BinData, StringBuilder, Crypt2;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
rest: HCkRest;
bTls: Boolean;
port: Integer;
bAutoReconnect: Boolean;
authAws: HCkAuthAws;
bd: HCkBinData;
crypt: HCkCrypt2;
treeHashHex: PWideChar;
linearHashHex: PWideChar;
sbResponseBody: HCkStringBuilder;
respStatusCode: Integer;
archiveId: PWideChar;
location: PWideChar;

begin
success := False;

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

rest := CkRest_Create();

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

// Provide AWS credentials.
authAws := CkAuthAws_Create();
CkAuthAws_putAccessKey(authAws,'AWS_ACCESS_KEY');
CkAuthAws_putSecretKey(authAws,'AWS_SECRET_KEY');
CkAuthAws_putServiceName(authAws,'glacier');
CkAuthAws_putRegion(authAws,'us-west-2');

success := CkRest_SetAuthAws(rest,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 := CkBinData_Create();
success := CkBinData_LoadFile(bd,'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
// 
CkRest_AddHeader(rest,'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 := CkCrypt2_Create();
CkCrypt2_putHashAlgorithm(crypt,'sha256-tree-hash');
CkCrypt2_putEncodingMode(crypt,'hexlower');
treeHashHex := CkCrypt2__hashBdENC(crypt,bd);
CkRest_AddHeader(rest,'x-amz-sha256-tree-hash',treeHashHex);

CkCrypt2_putHashAlgorithm(crypt,'sha256');
linearHashHex := CkCrypt2__hashBdENC(crypt,bd);
CkAuthAws_putPrecomputedSha256(authAws,linearHashHex);

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

sbResponseBody := CkStringBuilder_Create();
success := CkRest_FullRequestBd(rest,'POST','/AWS_ACCOUNT_ID/vaults/chilkat/archives',bd,sbResponseBody);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

respStatusCode := CkRest_getResponseStatusCode(rest);
if (respStatusCode >= 400) then
  begin
    Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(CkRest__responseHeader(rest));
    Memo1.Lines.Add('Response Body:');
    Memo1.Lines.Add(CkStringBuilder__getAsString(sbResponseBody));
    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 := CkRest__responseHdrByName(rest,'x-amz-archive-id');
Memo1.Lines.Add('x-amz-archive-id = ' + archiveId);

location := CkRest__responseHdrByName(rest,'Location');
Memo1.Lines.Add('Location = ' + location);

CkRest_Dispose(rest);
CkAuthAws_Dispose(authAws);
CkBinData_Dispose(bd);
CkCrypt2_Dispose(crypt);
CkStringBuilder_Dispose(sbResponseBody);

end;