Pascal (Lazarus/Delphi)

Amazon Glacier Remove Tags from Vault

See more Amazon Glacier Examples

Demonstrates how to remove one or more tags from the set of tags attached to a vault. 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.JsonObject,
  Chilkat.StringBuilder;

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

procedure RunDemo;
var
  success: Boolean;
  rest: TRest;
  bTls: Boolean;
  port: Integer;
  bAutoReconnect: Boolean;
  authAws: TAuthAws;
  json: TJsonObject;
  sbRequestBody: TStringBuilder;
  sbResponseBody: TStringBuilder;
  respStatusCode: Integer;

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 Remove Tags from Vault Reference Documentation
  //  
  rest.AddHeader('x-amz-glacier-version','2012-06-01');

  //  Create the JSON indicating the tags to be removed:
  //  Use this online tool to generate the code from sample JSON: 
  //  Generate Code to Create JSON

  //  {
  //     "TagKeys": [
  //        "tagName1",
  //        "tagName2"
  //     ]
  //  }

  json := TJsonObject.Create;
  json.UpdateString('TagKeys[0]','tagName1');
  json.UpdateString('TagKeys[1]','tagName2');
  //  ...
  //  ...

  sbRequestBody := TStringBuilder.Create;
  json.EmitSb(sbRequestBody);

  //  Add tags to the vault named "chilkat"
  sbResponseBody := TStringBuilder.Create;
  success := rest.FullRequestSb('POST','/AWS_ACCOUNT_ID/vaults/chilkat/tags?operation=remove',sbRequestBody,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 204 response status with an empty response body.
  WriteLn('response status code = ' + respStatusCode);


  rest.Free;
  authAws.Free;
  json.Free;
  sbRequestBody.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.