(Delphi ActiveX) Set Container ACL

Azure Storage Blob Service REST API: Sample code to set the permissions of a container.

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

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
rest: TChilkatRest;
bTls: Integer;
port: Integer;
bAutoReconnect: Integer;
success: Integer;
azAuth: TChilkatAuthAzureStorage;
prng: TChilkatPrng;
randomId: WideString;
dt: TCkDateTime;
bLocal: Integer;
curDtStr: WideString;
expireDtStr: WideString;
xml: TChilkatXml;
xSignedId: IChilkatXml;
xAccessPolicy: IChilkatXml;
responseStr: WideString;

begin
// Azure Blob Service Example: Set Container ACL
// See also: https://msdn.microsoft.com/en-us/library/azure/dd179391.aspx

// 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 Azure Storage Blob Service
bTls := 1;
port := 443;
bAutoReconnect := 1;
// In this example, the storage account name is "chilkat".
success := rest.Connect('chilkat.blob.core.windows.net',port,bTls,bAutoReconnect);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

// Provide Azure Cloud credentials for the REST call.
azAuth := TChilkatAuthAzureStorage.Create(Self);
azAuth.AccessKey := 'AZURE_ACCESS_KEY';
// The account name used here should match the 1st part of the domain passed in the call to Connect (above).
azAuth.Account := 'chilkat';
azAuth.Scheme := 'SharedKey';
azAuth.Service := 'Blob';
// This causes the "x-ms-version: 2021-08-06" header to be automatically added.
azAuth.XMsVersion := '2021-08-06';
success := rest.SetAuthAzureStorage(azAuth.ControlInterface);

// Note: The application does not need to explicitly set the following
// headers: x-ms-date, Authorization.  These headers
// are automatically set by Chilkat.

// The XML body of the request will look like this:

// <?xml version="1.0" encoding="utf-8"?>
// <SignedIdentifiers>
//   <SignedIdentifier> 
//     <Id>unique-character-value-of-up-to-64-chars</Id>
//     <AccessPolicy>
//       <Start>start-time</Start>
//       <Expiry>expiry-time</Expiry>
//       <Permission>abbreviated-permission-list</Permission>
//     </AccessPolicy>
//   </SignedIdentifier>
// </SignedIdentifiers>

// Generate a random 32-character string.
prng := TChilkatPrng.Create(Self);
randomId := prng.RandomString(32,1,1,1);

// Get the current system date/time in ISO 8061 format
dt := TCkDateTime.Create(Self);
dt.SetFromCurrentSystemTime();
bLocal := 0;
// Get the current date/time in ISO 8061 UTC format.
curDtStr := dt.GetAsTimestamp(bLocal);
// The expire time will be 365 days in the future.
success := dt.AddDays(365);
expireDtStr := dt.GetAsTimestamp(bLocal);

// Build the request:
xml := TChilkatXml.Create(Self);
xml.Tag := 'SignedIdentifiers';
xSignedId := xml.NewChild('SignedIdentifier','');
xSignedId.NewChild2('Id',randomId);
xAccessPolicy := xSignedId.NewChild('AccessPolicy','');
xAccessPolicy.NewChild2('Start',curDtStr);
xAccessPolicy.NewChild2('Expiry',expireDtStr);
xAccessPolicy.NewChild2('Permission','rwd');

// Show the XML..
Memo1.Lines.Add(xml.GetXml());

// The expected response is a 200 response status code with no response body.
responseStr := rest.FullRequestString('PUT','/mycontainer?restype=container&comp=acl',xml.GetXml());
if (rest.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

// When successful, the Azure Storage service will respond with a 200 response status code,
// with no response body.

if (rest.ResponseStatusCode <> 200) then
  begin
    // Examine the request/response to see what happened.
    Memo1.Lines.Add('response status code = ' + IntToStr(rest.ResponseStatusCode));
    Memo1.Lines.Add('response status text = ' + rest.ResponseStatusText);
    Memo1.Lines.Add('response header: ' + rest.ResponseHeader);
    Memo1.Lines.Add('response body (if any): ' + responseStr);
    Memo1.Lines.Add('---');
    Memo1.Lines.Add('LastRequestStartLine: ' + rest.LastRequestStartLine);
    Memo1.Lines.Add('LastRequestHeader: ' + rest.LastRequestHeader);
    Exit;
  end;

Memo1.Lines.Add('Success.');
end;