(Delphi DLL) Azure Storage: Delete Container

Azure Storage Blob Service REST API: Sample code to mark a container for deletion. The container and any blobs contained within it are later deleted during garbage collection.

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, Rest, AuthAzureStorage;

...

procedure TForm1.Button1Click(Sender: TObject);
var
rest: HCkRest;
bTls: Boolean;
port: Integer;
bAutoReconnect: Boolean;
success: Boolean;
azAuth: HCkAuthAzureStorage;
responseStr: PWideChar;

begin
// Azure Blob Service Example: Delete Container
// See also: https://msdn.microsoft.com/en-us/library/azure/dd179408.aspx

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

rest := CkRest_Create();

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

// Provide Azure Cloud credentials for the REST call.
azAuth := CkAuthAzureStorage_Create();
CkAuthAzureStorage_putAccessKey(azAuth,'AZURE_ACCESS_KEY');
// The account name used here should match the 1st part of the domain passed in the call to Connect (above).
CkAuthAzureStorage_putAccount(azAuth,'chilkat');
CkAuthAzureStorage_putScheme(azAuth,'SharedKey');
CkAuthAzureStorage_putService(azAuth,'Blob');
// This causes the "x-ms-version: 2020-08-04" header to be automatically added.
CkAuthAzureStorage_putXMsVersion(azAuth,'2020-08-04');
success := CkRest_SetAuthAzureStorage(rest,azAuth);

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

// To call Delete Container on a container that has an active lease, specify the lease ID in this header. 
// If this header is not specified when there is an active lease, Delete Container will return 409 (Conflict). 
// If you specify the wrong lease ID, or a lease ID on a container that does not have an active lease, 
// Delete Container will return 412 (Precondition failed).

// IMPORTANT: Delete this line, or insert a valid lease ID, otherwise the request
// will fail with a 400 status code..
success := CkRest_AddHeader(rest,'x-ms-lease-id','SOME_LEASE_ID');

// The expected success response is a 202 response status code with no response body.
// In this example, the container to be deleted is named "mycontainer".
responseStr := CkRest__fullRequestNoBody(rest,'DELETE','/mycontainer?restype=container');
if (CkRest_getLastMethodSuccess(rest) <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

// When successful, the Azure Storage service will respond with a 202 response code,
// with no response body.

// If the container with the same name already exists, then the operation will fail.
if (CkRest_getResponseStatusCode(rest) <> 202) then
  begin
    // Examine the request/response to see what happened.
    Memo1.Lines.Add('response status code = ' + IntToStr(CkRest_getResponseStatusCode(rest)));
    Memo1.Lines.Add('response status text = ' + CkRest__responseStatusText(rest));
    Memo1.Lines.Add('response header: ' + CkRest__responseHeader(rest));
    Memo1.Lines.Add('response body (if any): ' + responseStr);
    Memo1.Lines.Add('---');
    Memo1.Lines.Add('LastRequestStartLine: ' + CkRest__lastRequestStartLine(rest));
    Memo1.Lines.Add('LastRequestHeader: ' + CkRest__lastRequestHeader(rest));
    Exit;
  end;

Memo1.Lines.Add('Success: Container marked for deletion.');

CkRest_Dispose(rest);
CkAuthAzureStorage_Dispose(azAuth);

end;