Delphi ActiveX Requires Chilkat v11.0.0+

PayPal: Authorize a buyer-approved order

See more PayPal Examples

Authorize the stored order after the buyer approves it. Save the returned authorization ID and amount for capture or void. An authorization reserves funds; it is not a capture.

PayPal documentation

Delphi ActiveX

var
success: Integer;
http: TChilkatHttp;
resp: TChilkatHttpResponse;
crypt: TChilkatCrypt2;
requestId: WideString;
body: TChilkatJsonObject;
errorInfo: TChilkatJsonObject;
result: TChilkatJsonObject;
parsed: Integer;
i: Integer;
j: Integer;

begin
success := 0;

//  See Unlock Chilkat before making requests.
//  For the merchant's internal backoffice application. Load the sandbox token
//  from the merchant's credential store. Keep it out of publicly distributed apps.
//  See Get a PayPal access token.
http := TChilkatHttp.Create(Self);
http.AuthToken := 'SANDBOX_ACCESS_TOKEN';
resp := TChilkatHttpResponse.Create(Self);

//  Use the approved order created with intent AUTHORIZE.
http.SetUrlVar('id','ORDER_ID');
//  Create and persist this key once per business operation. On a timeout,
//  retry the same request with its saved key, not a newly generated one.
crypt := TChilkatCrypt2.Create(Self);
requestId := crypt.GenerateUuid();
http.SetRequestHeader('PayPal-Request-Id',requestId);
http.SetRequestHeader('Prefer','return=representation');
body := TChilkatJsonObject.Create(Self);

success := http.HttpJson('POST','https://api-m.sandbox.paypal.com/v2/checkout/orders/{$id}/authorize',body.ControlInterface,'application/json',resp.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add('No HTTP response: ' + http.LastErrorText);
    Exit;
  end;
if ((resp.StatusCode < 200) or (resp.StatusCode >= 300)) then
  begin
    errorInfo := TChilkatJsonObject.Create(Self);
    errorInfo.Load(resp.BodyStr);
    Memo1.Lines.Add('HTTP ' + IntToStr(resp.StatusCode) + ' ' + errorInfo.StringOf('name') + ' ' + errorInfo.StringOf('details[0].issue'));
    Memo1.Lines.Add('PayPal debug ID: ' + errorInfo.StringOf('debug_id'));
    Exit;
  end;

result := TChilkatJsonObject.Create(Self);
parsed := result.Load(resp.BodyStr);
if (parsed <> 1) then
  begin
    Memo1.Lines.Add('Expected a JSON response; HTTP ' + IntToStr(resp.StatusCode));
    Exit;
  end;
Memo1.Lines.Add('ID: ' + result.StringOf('id'));
Memo1.Lines.Add('Status: ' + result.StringOf('status'));
//  A purchase unit may have no authorizations yet, or more than one.
i := 0;
while (i < result.SizeOfArray('purchase_units')) do
  begin
    result.I := i;
    j := 0;
    while (j < result.SizeOfArray('purchase_units[i].payments.authorizations')) do
      begin
        result.J := j;
        Memo1.Lines.Add('Unit: ' + result.StringOf('purchase_units[i].reference_id') + '  authorization: ' + result.StringOf('purchase_units[i].payments.authorizations[j].id'));
        Memo1.Lines.Add('  ' + result.StringOf('purchase_units[i].payments.authorizations[j].status') + '  ' + result.StringOf('purchase_units[i].payments.authorizations[j].amount.value')
             + ' ' + result.StringOf('purchase_units[i].payments.authorizations[j].amount.currency_code'));
        j := j + 1;
      end;

    i := i + 1;
  end;