(Delphi ActiveX) Twitter Simple Tweet (Post Status Update)

Demonstrates sending a simple Twitter status update (tweet).

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
json: TChilkatJsonObject;
success: Integer;
rest: TChilkatRest;
oauth1: TChilkatOAuth1;
bAutoReconnect: Integer;
tweetContent: WideString;
resp: WideString;
jsonResponse: TChilkatJsonObject;

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

// ----------------------------------------------------------------------
// This initial setup, which involves setting the OAuth1 properties and connecting
// to api.twitter.com, is only required once at the beginning.  Once connected, the same
// object instance may be re-used, and if necessary, it will automatically reconnect
// as needed.

// Assume we've previously obtained an access token and saved it to a JSON file..
json := TChilkatJsonObject.Create(Self);
success := json.LoadFile('qa_data/tokens/twitter.json');

rest := TChilkatRest.Create(Self);
oauth1 := TChilkatOAuth1.Create(Self);

oauth1.ConsumerKey := 'TWITTER_CONSUMER_KEY';
oauth1.ConsumerSecret := 'TWITTER_CONSUMER_SECRET';
oauth1.Token := json.StringOf('oauth_token');
oauth1.TokenSecret := json.StringOf('oauth_token_secret');
oauth1.SignatureMethod := 'HMAC-SHA1';
oauth1.GenNonce(16);

rest.SetAuthOAuth1(oauth1.ControlInterface,0);

bAutoReconnect := 1;
success := rest.Connect('api.twitter.com',443,1,bAutoReconnect);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

// This ends the initial setup...
// ----------------------------------------------------------------------

tweetContent := 'This is a test tweet.';

// Send a tweet...
rest.ClearAllQueryParams();
rest.AddQueryParam('status',tweetContent);
resp := rest.FullRequestFormUrlEncoded('POST','/1.1/statuses/update.json');
if (rest.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

jsonResponse := TChilkatJsonObject.Create(Self);
jsonResponse.EmitCompact := 0;
jsonResponse.Load(resp);

if (rest.ResponseStatusCode <> 200) then
  begin
    Memo1.Lines.Add(jsonResponse.Emit());
    Exit;
  end;

// Show the successful response:
Memo1.Lines.Add(jsonResponse.Emit());
Memo1.Lines.Add('Success.');

// A successful JSON response looks like this:

// 	{
// 	  "created_at": "Tue Oct 18 01:58:44 +0000 2016",
// 	  "id": 788111589581114111,
// 	  "id_str": "788111189585711352",
// 	  "text": "This is a test tweet.",
// 	  "truncated": false,
// 	  "entities": {
// 	    "hashtags": [
// 	    ],
// 	    "symbols": [
// 	    ],
// 	    "user_mentions": [
// 	    ],
// 	    "urls": [
// 	    ]
// 	  },
// 	  "source": "\u003ca href=\"https:\/\/www.chilkatsoft.com\/\" rel=\"nofollow\"\u003eChilkatTestApp\u003c\/a\u003e",
// 	  "in_reply_to_status_id": null,
// 	  "in_reply_to_status_id_str": null,
// 	  "in_reply_to_user_id": null,
// 	  "in_reply_to_user_id_str": null,
// 	  "in_reply_to_screen_name": null,
// 	  "user": {
// 	    "id": 85647455,
// 	    "id_str": "85647455",
// 	    "name": "Chilkat Software",
// 	    "screen_name": "chilkatsoft",
// 	    "location": "",
// 	    "description": "",
// 	    "url": "https:\/\/t.co\/hSTR4sOuis",
// 	    "entities": {
// 	      "url": {
// 	        "urls": [
// 	          {
// 	            "url": "https:\/\/t.co\/hSTR4sOuis",
// 	            "expanded_url": "http:\/\/www.chilkatsoft.com",
// 	            "display_url": "chilkatsoft.com",
// 	            "indices": [
// 	              0,
// 	              23
// 	            ]
// 	          }
// 	        ]
// 	      },
// 	      "description": {
// 	        "urls": [
// 	        ]
// 	      }
// 	    },
// 	    "protected": false,
// 	    "followers_count": 36,
// 	    "friends_count": 0,
// 	    "listed_count": 4,
// 	    "created_at": "Tue Oct 27 19:56:13 +0000 2009",
// 	    "favourites_count": 0,
// 	    "utc_offset": null,
// 	    "time_zone": null,
// 	    "geo_enabled": false,
// 	    "verified": false,
// 	    "statuses_count": 6,
// 	    "lang": "en",
// 	    "contributors_enabled": false,
// 	    "is_translator": false,
// 	    "is_translation_enabled": false,
// 	    "profile_background_color": "C0DEED",
// 	    "profile_background_image_url": "http:\/\/abs.twimg.com\/images\/themes\/theme1\/bg.png",
// 	    "profile_background_image_url_https": "https:\/\/abs.twimg.com\/images\/themes\/theme1\/bg.png",
// 	    "profile_background_tile": false,
// 	    "profile_image_url": "http:\/\/pbs.twimg.com\/profile_images\/115893001012741111\/clLweDSg_normal.jpg",
// 	    "profile_image_url_https": "https:\/\/pbs.twimg.com\/profile_images\/115893001012741111\/clLweDSg_normal.jpg",
// 	    "profile_link_color": "0084B4",
// 	    "profile_sidebar_border_color": "C0DEED",
// 	    "profile_sidebar_fill_color": "DDEEF6",
// 	    "profile_text_color": "333333",
// 	    "profile_use_background_image": true,
// 	    "has_extended_profile": false,
// 	    "default_profile": true,
// 	    "default_profile_image": false,
// 	    "following": false,
// 	    "follow_request_sent": false,
// 	    "notifications": false
// 	  },
// 	  "geo": null,
// 	  "coordinates": null,
// 	  "place": null,
// 	  "contributors": null,
// 	  "is_quote_status": false,
// 	  "retweet_count": 0,
// 	  "favorite_count": 0,
// 	  "favorited": false,
// 	  "retweeted": false,
// 	  "lang": "en"
// 	}
// 
end;