Pascal (Lazarus/Delphi)

Clickatell Send SMS Text Message

See more Clickatell Examples

Demonstrate how to send a Clickatell SMS text message. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Http,
  Chilkat.StringBuilder,
  Chilkat.HttpResponse,
  Chilkat.JsonObject;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  json: TJsonObject;
  resp: THttpResponse;
  sbResponseBody: TStringBuilder;
  jResp: TJsonObject;
  respStatusCode: Integer;
  errorCode: string;
  error: string;
  errorDescription: string;
  i: Integer;
  count_i: Integer;
  apiMessageId: string;
  accepted: Boolean;
  v_to: string;

begin
  success := False;

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

  http := THttp.Create;

  //  Implements the following CURL command:

  //  curl -i \
  //  -X POST \
  //  -H "Content-Type: application/json" \
  //  -H "Accept: application/json" \
  //  -H "Authorization: API_KEY" \
  //  -d '{"content": "Test Message Text", "to": ["PHONE_NUMBER"], "from": "FROM_PHONE_NUMBER" }' \
  //  -s https://platform.clickatell.com/messages

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

  //  The following JSON is sent in the request body.

  //  {
  //    "content": "Test Message Text",
  //    "to": [
  //      "PHONE_NUMBER"
  //    ]
  //  }

  json := TJsonObject.Create;
  json.UpdateString('content','Test Message Text');
  json.UpdateString('to[0]','PHONE_NUMBER');
  json.UpdateString('from','FROM_PHONE_NUMBER');

  http.SetRequestHeader('Authorization','API_KEY');
  http.SetRequestHeader('Accept','application/json');
  http.SetRequestHeader('Content-Type','application/json');

  //  If the following URL does not work, then try "https://platform.clickatell.com/v1/message"
  resp := THttpResponse.Create;
  success := http.HttpJson('POST','https://platform.clickatell.com/messages',json,'application/json',resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  sbResponseBody := TStringBuilder.Create;
  resp.GetBodySb(sbResponseBody);
  jResp := TJsonObject.Create;
  jResp.LoadSb(sbResponseBody);
  jResp.EmitCompact := False;

  WriteLn('Response Body:');
  WriteLn(jResp.Emit());

  respStatusCode := resp.StatusCode;
  WriteLn('Response Status Code = ' + respStatusCode);
  if (respStatusCode >= 400) then
    begin
      WriteLn('Response Header:');
      WriteLn(resp.Header);
      WriteLn('Failed.');
      Exit;
    end;

  //  Sample JSON response:
  //  (Sample code for parsing the JSON response is shown below)

  //  {
  //    "messages": [
  //      {
  //        "apiMessageId": "66c06ac68e5c4afb953ea9328babfde6",
  //        "accepted": true,
  //        "to": "16302581871",
  //        "errorCode": null,
  //        "error": null,
  //        "errorDescription": null
  //      }
  //    ],
  //    "errorCode": null,
  //    "error": null,
  //    "errorDescription": null
  //  }

  //  Sample code for parsing the JSON response...
  //  Use the following online tool to generate parsing code from sample JSON:
  //  Generate Parsing Code from JSON

  errorCode := jResp.StringOf('errorCode');
  error := jResp.StringOf('error');
  errorDescription := jResp.StringOf('errorDescription');
  i := 0;
  count_i := jResp.SizeOfArray('messages');
  while i < count_i do
    begin
      jResp.I := i;
      apiMessageId := jResp.StringOf('messages[i].apiMessageId');
      accepted := jResp.BoolOf('messages[i].accepted');
      v_to := jResp.StringOf('messages[i].to');
      errorCode := jResp.StringOf('messages[i].errorCode');
      error := jResp.StringOf('messages[i].error');
      errorDescription := jResp.StringOf('messages[i].errorDescription');
      i := i + 1;
    end;



  http.Free;
  json.Free;
  resp.Free;
  sbResponseBody.Free;
  jResp.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.