Delphi DLL

Clickatell Send SMS Text Message

See more Clickatell Examples

Demonstrate how to send a Clickatell SMS text message. Delphi DLL

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
json: HCkJsonObject;
resp: HCkHttpResponse;
sbResponseBody: HCkStringBuilder;
jResp: HCkJsonObject;
respStatusCode: Integer;
errorCode: PWideChar;
error: PWideChar;
errorDescription: PWideChar;
i: Integer;
count_i: Integer;
apiMessageId: PWideChar;
accepted: Boolean;
v_to: 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();

// 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 := CkJsonObject_Create();
CkJsonObject_UpdateString(json,'content','Test Message Text');
CkJsonObject_UpdateString(json,'to[0]','PHONE_NUMBER');
CkJsonObject_UpdateString(json,'from','FROM_PHONE_NUMBER');

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

// If the following URL does not work, then try "https://platform.clickatell.com/v1/message"
resp := CkHttpResponse_Create();
success := CkHttp_HttpJson(http,'POST','https://platform.clickatell.com/messages',json,'application/json',resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

sbResponseBody := CkStringBuilder_Create();
CkHttpResponse_GetBodySb(resp,sbResponseBody);
jResp := CkJsonObject_Create();
CkJsonObject_LoadSb(jResp,sbResponseBody);
CkJsonObject_putEmitCompact(jResp,False);

Memo1.Lines.Add('Response Body:');
Memo1.Lines.Add(CkJsonObject__emit(jResp));

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;

// 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 := CkJsonObject__stringOf(jResp,'errorCode');
error := CkJsonObject__stringOf(jResp,'error');
errorDescription := CkJsonObject__stringOf(jResp,'errorDescription');
i := 0;
count_i := CkJsonObject_SizeOfArray(jResp,'messages');
while i < count_i do
  begin
    CkJsonObject_putI(jResp,i);
    apiMessageId := CkJsonObject__stringOf(jResp,'messages[i].apiMessageId');
    accepted := CkJsonObject_BoolOf(jResp,'messages[i].accepted');
    v_to := CkJsonObject__stringOf(jResp,'messages[i].to');
    errorCode := CkJsonObject__stringOf(jResp,'messages[i].errorCode');
    error := CkJsonObject__stringOf(jResp,'messages[i].error');
    errorDescription := CkJsonObject__stringOf(jResp,'messages[i].errorDescription');
    i := i + 1;
  end;

CkHttp_Dispose(http);
CkJsonObject_Dispose(json);
CkHttpResponse_Dispose(resp);
CkStringBuilder_Dispose(sbResponseBody);
CkJsonObject_Dispose(jResp);

end;