Pascal (Lazarus/Delphi)

Azure Storage: Get Blob Service Properties

See more Azure Cloud Storage Examples

Azure Storage Blob Service REST API: Sample code to get a blob's service properties. 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;

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

procedure RunDemo;
var
  success: Boolean;
  rest: TRest;
  bTls: Boolean;
  port: Integer;
  bAutoReconnect: Boolean;
  azAuth: TAuthAzureStorage;
  responseStr: string;
  xml: TXml;

begin
  success := False;

  //  Azure Blob Service Example: Get Blob Service Properties

  //  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);

  //  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','/?restype=service&comp=properties');
  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.
  //  An example of the response XML is shown below.
  xml := TXml.Create;
  success := xml.LoadXml(responseStr);

  WriteLn(xml.GetXml());

  //  Use the ChilkatPath method to get various pieces of information out
  //  of the XML.  For example:

  WriteLn('Logging retention policy #days = ' + xml.ChilkatPath('Logging|RetentionPolicy|Days|*'));
  WriteLn('Hour metrics include APIs = ' + xml.ChilkatPath('HourMetrics|IncludeAPIs|*'));

  //  <?xml version="1.0" encoding="utf-8" ?>
  //  <StorageServiceProperties>
  //      <Logging>
  //          <Version>1.0</Version>
  //          <Read>true</Read>
  //          <Write>true</Write>
  //          <Delete>true</Delete>
  //          <RetentionPolicy>
  //              <Enabled>true</Enabled>
  //              <Days>7</Days>
  //          </RetentionPolicy>
  //      </Logging>
  //      <HourMetrics>
  //          <Version>1.0</Version>
  //          <Enabled>true</Enabled>
  //          <IncludeAPIs>true</IncludeAPIs>
  //          <RetentionPolicy>
  //              <Enabled>true</Enabled>
  //              <Days>7</Days>
  //          </RetentionPolicy>
  //      </HourMetrics>
  //      <MinuteMetrics>
  //          <Version>1.0</Version>
  //          <Enabled>false</Enabled>
  //          <RetentionPolicy>
  //              <Enabled>false</Enabled>
  //          </RetentionPolicy>
  //      </MinuteMetrics>
  //      <Cors />
  //  </StorageServiceProperties>


  rest.Free;
  azAuth.Free;
  xml.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.