Delphi DLL

WaTrend Send WhatsApp Text

See more WaTrend Examples

Send a WhatsApp text. Delphi DLL

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
req: HCkHttpRequest;
sbUrl: HCkStringBuilder;
responseBodyStr: PWideChar;
resp: HCkHttpResponse;
sbResponseBody: HCkStringBuilder;
respStatusCode: Integer;
jResp: HCkJsonObject;
status: PWideChar;

begin
success := False;

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

http := CkHttp_Create();

// Use your actual access token instead of 555555555555555555555555555555
req := CkHttpRequest_Create();
CkHttpRequest_AddParam(req,'number','84933313xxx');
CkHttpRequest_AddParam(req,'type','text');
CkHttpRequest_AddParam(req,'message','This is a test message');
CkHttpRequest_AddParam(req,'instance_id','609ACF283XXXX');
CkHttpRequest_AddParam(req,'access_token','555555555555555555555555555555');

// Note: The WaTrend online documentation indicate a POST should be used.
// However, it seems you might actually need to send a GET request.
// It is unclear.  
// If a GET is neeed, you would just send to the URL w/ query params like this:
sbUrl := CkStringBuilder_Create();
CkStringBuilder_Append(sbUrl,'https://app.watrend.com/api/send.php?');
CkStringBuilder_Append(sbUrl,CkHttpRequest__getUrlEncodedParams(req));
responseBodyStr := CkHttp__quickGetStr(http,CkStringBuilder__getAsString(sbUrl));
// The responseBodyStr contains the JSON response from the server..

CkHttpRequest_putHttpVerb(req,'POST');
CkHttpRequest_putContentType(req,'application/x-www-form-urlencoded');

resp := CkHttpResponse_Create();
success := CkHttp_HttpReq(http,'https://app.watrend.com/api/send.php',req,resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

sbResponseBody := CkStringBuilder_Create();
CkHttpResponse_GetBodySb(resp,sbResponseBody);

respStatusCode := CkHttpResponse_getStatusCode(resp);
Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
if (respStatusCode >= 400) then
  begin
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(CkHttpResponse__header(resp));
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

Memo1.Lines.Add(CkHttpResponse__bodyStr(resp));

// Both success and failed responses use 200 status code.

// A success response contains this JSON in the response body:
// {"status":"success", ... }

// A failed response will contain something like this:
// {"status":"error","message":"License Invalidated"}

jResp := CkJsonObject_Create();
CkJsonObject_LoadSb(jResp,sbResponseBody);

status := CkJsonObject__stringOf(jResp,'status');
Memo1.Lines.Add('status: ' + status);

CkHttp_Dispose(http);
CkHttpRequest_Dispose(req);
CkStringBuilder_Dispose(sbUrl);
CkHttpResponse_Dispose(resp);
CkStringBuilder_Dispose(sbResponseBody);
CkJsonObject_Dispose(jResp);

end;