(Delphi ActiveX) Clickatell Send SMS Text Message using HTTP GET

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Demonstrate how to send a Clickatell SMS text message using an HTTP GET request with query params.

For more information, see https://docs.clickatell.com/channels/sms-channels/sms-api-reference/#tag/SMS-API/operation/sendMessageHTTP

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
http: TChilkatHttp;
success: Integer;
queryParams: TChilkatJsonObject;
resp: IChilkatHttpResponse;

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

http := TChilkatHttp.Create(Self);

// Implements the following CURL command:

// curl -G https://api.clickatell.com/http/sendmsg \
//   -d "api_id=xxxx" \
//   -d "user=yourUsername" \
//   -d "password=yourPassword" \
//   -d "from=yourFromPhoneNumber" \
//   -d "to=receiverPhoneNumber" \
//   -d "text=The text of your message"

// Use the following online tool to generate HTTP code from a CURL command
// Convert a cURL Command to HTTP Source Code

queryParams := TChilkatJsonObject.Create(Self);
queryParams.UpdateString('api_id','xxxx');
queryParams.UpdateString('user','yourUsername');
queryParams.UpdateString('password','yourPassword');
queryParams.UpdateString('from','yourFromPhoneNumber');
queryParams.UpdateString('to','receiverPhoneNumber');
queryParams.UpdateString('text','The text of your message');

// If the following URL does not work, then try "https://api.clickatell.com/http/sendmsg"
resp := http.QuickRequestParams('GET','https://platform.clickatell.com/messages/http/send',queryParams.ControlInterface);
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add(IntToStr(resp.StatusCode));
Memo1.Lines.Add(resp.BodyStr);
end;