(Delphi ActiveX) IMAP Get Quota Root

Sends the GETQUOTAROOT command to the IMAP server to get the quota root for a given mailbox. This also provides quota information for the given mailbox.

The GetQuotaRoot method is available in Chilkat starting at v9.5.0.58, and is only available for IMAP servers that support the QUOTA extension.

The information is returned in JSON format. This example demonstrates how to parse the JSON to get the desired information.

Typically, the quota root for the Inbox is the empty string.

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
imap: TChilkatImap;
success: Integer;
caps: WideString;
jsonStr: WideString;
json: TChilkatJsonObject;
quotaRoot: WideString;
resourceName: WideString;
quotaUsed: Integer;
quotaMax: Integer;

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

imap := TChilkatImap.Create(Self);

// Use TLS
imap.Ssl := 1;
imap.Port := 993;
success := imap.Connect('MY-IMAP-DOMAIN');
if (success <> 1) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

// Authenticate
success := imap.Login('MY-IMAP-LOGIN','MY-IMAP-PASSWORD');
if (success <> 1) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

// First check to see if the IMAP server supports the QUOTA extension.
caps := imap.Capability();
if (imap.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

if (imap.HasCapability('QUOTA',caps) <> 1) then
  begin
    Memo1.Lines.Add('IMAP server does not support the QUOTA extension.');
    Exit;
  end;

jsonStr := imap.GetQuotaRoot('Inbox');
if (imap.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(imap.LastErrorText);
    Exit;
  end;

// The JSON string will look something like this:
// {"QUOTAROOT":{"mailbox":"Inbox","root":""},"QUOTA":{"root":"","resource":"STORAGE","used":22216,"max":15728640}}
Memo1.Lines.Add(jsonStr);

// This is easy to parse...
json := TChilkatJsonObject.Create(Self);
json.Load(jsonStr);

// Get the quota root for Inbox, which is an empty string in the case above.
quotaRoot := json.StringOf('QUOTAROOT.root');
Memo1.Lines.Add('Quota Root for Inbox: [' + quotaRoot + ']');

// Now get the resource name (which can be STORAGE or MESSAGE) and the used/max values.
// Most servers have STORAGE quotas, which are for total capacity.  For example, GMail's
// STORAGE quota is 15GB (at the time of writing this example).
// A MESSAGE quota sets a limit on the number of messages.
resourceName := json.StringOf('QUOTA.resource');
quotaUsed := json.IntOf('QUOTA.used');
quotaMax := json.IntOf('QUOTA.max');

Memo1.Lines.Add('Resource: ' + resourceName);
Memo1.Lines.Add('Quota Used (in KB): ' + IntToStr(quotaUsed));
Memo1.Lines.Add('Quota Max (in KB): ' + IntToStr(quotaMax));

// Disconnect from the IMAP server.
success := imap.Disconnect();
end;