Pascal (Lazarus/Delphi)

Azure Blob Service - List all Containers in a Storage Account

See more Azure Cloud Storage Examples

Azure Storage Blob Service REST API: Lists all the containers in a storage account. 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.Rest,
  Chilkat.AuthAzureStorage,
  Chilkat.Xml,
  Chilkat.CkDateTime;

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

procedure RunDemo;
var
  success: Boolean;
  rest: TRest;
  bTls: Boolean;
  port: Integer;
  bAutoReconnect: Boolean;
  azAuth: TAuthAzureStorage;
  responseStr: string;
  xml: TXml;
  numContainers: Integer;
  i: Integer;
  lastModDateStr: string;
  dateTime: TCkDateTime;
  leaseState: string;

begin
  success := False;

  //  Azure Blob Service Example: List all of the containers in an account.

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

  rest := TRest.Create;

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

  //  Provide Azure Cloud credentials for the REST call.
  azAuth := TAuthAzureStorage.Create;
  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);

  //  URI parameters, such as "maxresults", are added by calling AddQueryParam
  success := rest.AddQueryParam('maxresults','1000');

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

  responseStr := rest.FullRequestNoBody('GET','/?comp=list');
  if (rest.LastMethodSuccess <> True) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  //  When successful, the Azure Storage service will respond with a 200 response code,
  //  with an XML body.  
  if (rest.ResponseStatusCode <> 200) then
    begin
      //  Examine the request/response to see what happened.
      WriteLn('response status code = ' + rest.ResponseStatusCode);
      WriteLn('response status text = ' + rest.ResponseStatusText);
      WriteLn('response header: ' + rest.ResponseHeader);
      WriteLn('response body (if any): ' + responseStr);
      WriteLn('---');
      WriteLn('LastRequestStartLine: ' + rest.LastRequestStartLine);
      WriteLn('LastRequestHeader: ' + rest.LastRequestHeader);
      Exit;
    end;

  //  Load the XML response for parsing.
  //  A sample XML response containing 2 containers is shown below.
  xml := TXml.Create;
  success := xml.LoadXml(responseStr);

  WriteLn(xml.GetXml());

  //  Iterate over the containers, listing some information about each.
  success := xml.FindChild2('Containers');
  numContainers := xml.NumChildren;
  i := 0;
  while (i < numContainers) do
    begin
      success := xml.GetChild2(i);
      WriteLn('Container Name: ' + xml.GetChildContent('Name'));
      lastModDateStr := xml.ChilkatPath('Properties|Last-Modified|*');
      WriteLn('Last Modified: ' + lastModDateStr);
      //  The date/time string can be loaded into a CkDateTime object for conversion to other date formats..
      dateTime := TCkDateTime.Create;
      success := dateTime.SetFromRfc822(lastModDateStr);

      leaseState := xml.ChilkatPath('Properties|LeaseState|*');
      WriteLn('Lease State: ' + leaseState);

      success := xml.GetParent2();
      i := i + 1;
    end;

  success := xml.GetParent2();

  //  Sample XML response:

  //  	<?xml version="1.0" encoding="utf-8" ?>
  //  	<EnumerationResults ServiceEndpoint="https://chilkat.blob.core.windows.net/">
  //  	    <MaxResults>1000</MaxResults>
  //  	    <Containers>
  //  	        <Container>
  //  	            <Name>test</Name>
  //  	            <Properties>
  //  	                <Last-Modified>Wed, 20 Apr 2016 01:02:25 GMT</Last-Modified>
  //  	                <Etag>"0x8D368B77024C583"</Etag>
  //  	                <LeaseStatus>unlocked</LeaseStatus>
  //  	                <LeaseState>available</LeaseState>
  //  	            </Properties>
  //  	        </Container>
  //  	        <Container>
  //  	            <Name>test2</Name>
  //  	            <Properties>
  //  	                <Last-Modified>Tue, 03 May 2016 17:13:01 GMT</Last-Modified>
  //  	                <Etag>"0x8D373762EB6AC85"</Etag>
  //  	                <LeaseStatus>unlocked</LeaseStatus>
  //  	                <LeaseState>available</LeaseState>
  //  	            </Properties>
  //  	        </Container>
  //  	    </Containers>
  //  	    <NextMarker />
  //  	</EnumerationResults>


  rest.Free;
  azAuth.Free;
  xml.Free;
      dateTime.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.