(Delphi ActiveX) Get Task Lists

Demonstrates how to download the Google task lists.

Note: This example requires Chilkat v11.0.0 or greater.

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
success: Integer;
fac: TCkFileAccess;
accessToken: WideString;
http: TChilkatHttp;
resp: TChilkatHttpResponse;
kind: WideString;
etag: WideString;
i: Integer;
count_i: Integer;
id: WideString;
title: WideString;
updated: WideString;
selfLink: WideString;
json: TChilkatJsonObject;

begin
success := 0;

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

// Get the previously obtained access token.
// See Get Google Tasks Access Token.

fac := TCkFileAccess.Create(Self);
accessToken := fac.ReadEntireTextFile('qa_data/tokens/googleTasks.txt','utf-8');
if (fac.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(fac.LastErrorText);
    Exit;
  end;

http := TChilkatHttp.Create(Self);

http.AuthToken := accessToken;

resp := TChilkatHttpResponse.Create(Self);
success := http.HttpNoBody('GET','https://www.googleapis.com/tasks/v1/users/@me/lists',resp.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

// Show the response body.
Memo1.Lines.Add(resp.BodyStr);

// Examine the response status code.
Memo1.Lines.Add('response status code: ' + IntToStr(resp.StatusCode));

// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

json := TChilkatJsonObject.Create(Self);
json.Load(resp.BodyStr);

kind := json.StringOf('kind');
etag := json.StringOf('etag');
i := 0;
count_i := json.SizeOfArray('items');
while i < count_i do
  begin
    json.I := i;
    kind := json.StringOf('items[i].kind');
    id := json.StringOf('items[i].id');
    title := json.StringOf('items[i].title');
    updated := json.StringOf('items[i].updated');
    selfLink := json.StringOf('items[i].selfLink');
    i := i + 1;
  end;

// Sample response:

// {
//  "kind": "tasks#taskLists",
//  "etag": "\"84_7Cubo3y98GMV9bE3zQclHxhc/cv_AS-HUP96xJ9bgP8Y2B8WGSpM\"",
//  "items": [
//   {
//    "kind": "tasks#taskList",
//    "id": "MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6MDow",
//    "title": "My Tasks",
//    "updated": "2019-04-04T17:42:52.000Z",
//    "selfLink": "https://www.googleapis.com/tasks/v1/users/@me/lists/MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6MDow"
//   },
//   {
//    "kind": "tasks#taskList",
//    "id": "MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6MzE3OTUxODY4OTU1MTEwMDow",
//    "title": "ccc",
//    "updated": "2019-04-04T17:15:19.000Z",
//    "selfLink": "https://www.googleapis.com/tasks/v1/users/@me/lists/MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6MzE3OTUxODY4OTU1MTEwMDow"
//   },
//   {
//    "kind": "tasks#taskList",
//    "id": "MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NDQ0NTA4MDYyNTY3OTEzMzow",
//    "title": "bbb",
//    "updated": "2019-04-04T17:15:02.000Z",
//    "selfLink": "https://www.googleapis.com/tasks/v1/users/@me/lists/MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NDQ0NTA4MDYyNTY3OTEzMzow"
//   },
//   {
//    "kind": "tasks#taskList",
//    "id": "MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NzAwOTA4MDA1NzU2ODYwMzow",
//    "title": "aaa",
//    "updated": "2019-04-04T17:13:17.000Z",
//    "selfLink": "https://www.googleapis.com/tasks/v1/users/@me/lists/MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NzAwOTA4MDA1NzU2ODYwMzow"
//   }
//  ]
// }
// 
// response status code: 200
end;