Delphi DLL

Create a New GMail Label

See more GMail REST API Examples

Demonstrates how to create a new GMail label. Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, HttpResponse, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
userId: PWideChar;
json: HCkJsonObject;
url: PWideChar;
resp: HCkHttpResponse;

begin
success := False;

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

http := CkHttp_Create();
CkHttp_putAuthToken(http,'GMAIL-ACCESS-TOKEN');

userId := 'me';
CkHttp_SetUrlVar(http,'userId',userId);

// Create the JSON to be sent in the HTTP request body.
// The name of the new label is "questions".
json := CkJsonObject_Create();
CkJsonObject_UpdateString(json,'name','questions');
CkJsonObject_UpdateString(json,'labelListVisibility','labelShow');
CkJsonObject_UpdateString(json,'messageListVisibility','show');

CkJsonObject_putEmitCompact(json,False);
Memo1.Lines.Add(CkJsonObject__emit(json));

// The JSON contains this:
// {
//   "name": "questions",
//   "labelListVisibility": "labelShow",
//   "messageListVisibility": "show"
// }

url := 'https://www.googleapis.com/gmail/v1/users/{$userId}/labels';
resp := CkHttpResponse_Create();
success := CkHttp_HttpJson(http,'POST',url,json,'application/json',resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

Memo1.Lines.Add('status = ' + IntToStr(CkHttpResponse_getStatusCode(resp)));

// A 200 response status indicate success.
if (CkHttpResponse_getStatusCode(resp) <> 200) then
  begin
    Memo1.Lines.Add(CkHttpResponse__bodyStr(resp));
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

// A successful repsonse contains JSON that looks like this:

// {
//  "id": "Label_43",
//  "name": "questions",
//  "messageListVisibility": "show",
//  "labelListVisibility": "labelShow"
// }

Memo1.Lines.Add('response body:');
Memo1.Lines.Add(CkHttpResponse__bodyStr(resp));

Memo1.Lines.Add('GMail label created!');

CkHttp_Dispose(http);
CkJsonObject_Dispose(json);
CkHttpResponse_Dispose(resp);

end;