Pascal (Lazarus/Delphi)

Amazon Glacier Get Vault Access Policy

See more Amazon Glacier Examples

Demonstrates how to retrieve the access-policy subresource set on the 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.StringBuilder,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  success: Boolean;
  rest: TRest;
  bTls: Boolean;
  port: Integer;
  bAutoReconnect: Boolean;
  authAws: TAuthAws;
  sbResponseBody: TStringBuilder;
  respStatusCode: Integer;
  json: TJsonObject;
  jsonPolicy: TJsonObject;
  Version: string;
  i: Integer;
  count_i: Integer;
  Sid: string;
  Effect: string;
  PrincipalAWS: string;
  Action: string;
  Resource: 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 Get Vault Access Policy Reference Documentation
  //  
  rest.AddHeader('x-amz-glacier-version','2012-06-01');

  //  Get the access policy for the "chilkat" vault.
  sbResponseBody := TStringBuilder.Create;
  success := rest.FullRequestNoBodySb('GET','/AWS_ACCOUNT_ID/vaults/chilkat/access-policy',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 200 response status.
  WriteLn('response status code = ' + respStatusCode);

  json := TJsonObject.Create;
  json.LoadSb(sbResponseBody);
  json.EmitCompact := False;

  //  Returns JSON such as this:
  //  {
  //    "Policy": "{\"Version\":\"2012-10-17\",\"Statement\":[{\"Sid\":\"Define-owner-access-rights\",\"Effect\":\"Allow\",\"Principal\":{\"AWS\":\"arn:aws:iam::9999999999999:root\"},\"Action\":\"glacier:DeleteArchive\",\"Resource\":\"arn:aws:glacier:us-west-2:9999999999999:vaults/chilkat\"}]}"
  //  }

  //  Unwrap...
  jsonPolicy := TJsonObject.Create;
  jsonPolicy.Load(json.StringOf('Policy'));
  jsonPolicy.EmitCompact := False;

  WriteLn(jsonPolicy.Emit());
  WriteLn('----');

  //  The jsonPolicy contains:

  //  {
  //    "Version": "2012-10-17",
  //    "Statement": [
  //      {
  //        "Sid": "Define-owner-access-rights",
  //        "Effect": "Allow",
  //        "Principal": {
  //          "AWS": "arn:aws:iam::9999999999999:root"
  //        },
  //        "Action": "glacier:DeleteArchive",
  //        "Resource": "arn:aws:glacier:us-west-2:9999999999999:vaults/chilkat"
  //      }
  //    ]
  //  }
  //  

  //  Use this online tool to generate parsing code from sample JSON: 
  //  Generate Parsing Code from JSON

  //  To parse the above contents of jsonPolicy...

  Version := jsonPolicy.StringOf('Version');
  i := 0;
  count_i := jsonPolicy.SizeOfArray('Statement');
  while i < count_i do
    begin
      jsonPolicy.I := i;
      Sid := jsonPolicy.StringOf('Statement[i].Sid');
      Effect := jsonPolicy.StringOf('Statement[i].Effect');
      PrincipalAWS := jsonPolicy.StringOf('Statement[i].Principal.AWS');
      Action := jsonPolicy.StringOf('Statement[i].Action');
      Resource := jsonPolicy.StringOf('Statement[i].Resource');
      i := i + 1;
    end;



  rest.Free;
  authAws.Free;
  sbResponseBody.Free;
  json.Free;
  jsonPolicy.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.