(Delphi DLL) Amazon Glacier Get Vault Access Policy

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

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
rest: HCkRest;
bTls: Boolean;
port: Integer;
bAutoReconnect: Boolean;
success: Boolean;
authAws: HCkAuthAws;
sbResponseBody: HCkStringBuilder;
respStatusCode: Integer;
json: HCkJsonObject;
jsonPolicy: HCkJsonObject;
Version: PWideChar;
i: Integer;
count_i: Integer;
Sid: PWideChar;
Effect: PWideChar;
PrincipalAWS: PWideChar;
Action: PWideChar;
Resource: PWideChar;

begin
// 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.
// --------------------------------------------------------------------------

// 
// For more information, see Glacier Get Vault Access Policy Reference Documentation
// 
CkRest_AddHeader(rest,'x-amz-glacier-version','2012-06-01');

// Get the access policy for the "chilkat" vault.
sbResponseBody := CkStringBuilder_Create();
success := CkRest_FullRequestNoBodySb(rest,'GET','/AWS_ACCOUNT_ID/vaults/chilkat/access-policy',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 200 response status.
Memo1.Lines.Add('response status code = ' + IntToStr(respStatusCode));

json := CkJsonObject_Create();
CkJsonObject_LoadSb(json,sbResponseBody);
CkJsonObject_putEmitCompact(json,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 := CkJsonObject_Create();
CkJsonObject_Load(jsonPolicy,CkJsonObject__stringOf(json,'Policy'));
CkJsonObject_putEmitCompact(jsonPolicy,False);

Memo1.Lines.Add(CkJsonObject__emit(jsonPolicy));
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 := CkJsonObject__stringOf(jsonPolicy,'Version');
i := 0;
count_i := CkJsonObject_SizeOfArray(jsonPolicy,'Statement');
while i < count_i do
  begin
    CkJsonObject_putI(jsonPolicy,i);
    Sid := CkJsonObject__stringOf(jsonPolicy,'Statement[i].Sid');
    Effect := CkJsonObject__stringOf(jsonPolicy,'Statement[i].Effect');
    PrincipalAWS := CkJsonObject__stringOf(jsonPolicy,'Statement[i].Principal.AWS');
    Action := CkJsonObject__stringOf(jsonPolicy,'Statement[i].Action');
    Resource := CkJsonObject__stringOf(jsonPolicy,'Statement[i].Resource');
    i := i + 1;
  end;

CkRest_Dispose(rest);
CkAuthAws_Dispose(authAws);
CkStringBuilder_Dispose(sbResponseBody);
CkJsonObject_Dispose(json);
CkJsonObject_Dispose(jsonPolicy);

end;