Delphi ActiveX

Amazon Glacier Get Vault Access Policy

See more Amazon Glacier Examples

Demonstrates how to retrieve the access-policy subresource set on the vault Delphi ActiveX

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
rest: TChilkatRest;
bTls: Integer;
port: Integer;
bAutoReconnect: Integer;
authAws: TChilkatAuthAws;
sbResponseBody: TChilkatStringBuilder;
respStatusCode: Integer;
json: TChilkatJsonObject;
jsonPolicy: TChilkatJsonObject;
Version: WideString;
i: Integer;
count_i: Integer;
Sid: WideString;
Effect: WideString;
PrincipalAWS: WideString;
Action: WideString;
Resource: WideString;

begin
success := 0;

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

rest := TChilkatRest.Create(Self);

// Connect to the Amazon AWS REST server in the desired region.
bTls := 1;
port := 443;
bAutoReconnect := 1;
success := rest.Connect('glacier.us-west-2.amazonaws.com',port,bTls,bAutoReconnect);

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

success := rest.SetAuthAws(authAws.ControlInterface);

// --------------------------------------------------------------------------
// 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 := TChilkatStringBuilder.Create(Self);
success := rest.FullRequestNoBodySb('GET','/AWS_ACCOUNT_ID/vaults/chilkat/access-policy',sbResponseBody.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

respStatusCode := rest.ResponseStatusCode;
if (respStatusCode >= 400) then
  begin
    Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(rest.ResponseHeader);
    Memo1.Lines.Add('Response Body:');
    Memo1.Lines.Add(sbResponseBody.GetAsString());
    Exit;
  end;

// Success is indicated by a 200 response status.
Memo1.Lines.Add('response status code = ' + IntToStr(respStatusCode));

json := TChilkatJsonObject.Create(Self);
json.LoadSb(sbResponseBody.ControlInterface);
json.EmitCompact := 0;

// 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 := TChilkatJsonObject.Create(Self);
jsonPolicy.Load(json.StringOf('Policy'));
jsonPolicy.EmitCompact := 0;

Memo1.Lines.Add(jsonPolicy.Emit());
Memo1.Lines.Add('----');

// 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;
end;