(Delphi ActiveX) Send ZATCA Invoice for Clearance

See more ZATCA Examples

Demonstrates how to send a ZATCA invoice for clearance, which is to send the HTTP POST with invoice hash and the signed invoice in base64 format.

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
signedXmlFilePath: WideString;
signedXml: TChilkatXml;
success: Integer;
invoiceHash: WideString;
cbc_UUID: WideString;
bd: TChilkatBinData;
base64Invoice: WideString;
json: TChilkatJsonObject;
http: TChilkatHttp;
resp: IChilkatHttpResponse;
statusCode: Integer;
jsonResp: TChilkatJsonObject;

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

// This example will send a POST with HTTP Basic Authentication to 
// https://gw-fatoora.zatca.sa/e-invoicing/simulation/invoices/clearance/single

// NOTE: At the time of this writing, I don't know for sure if the above URL is correct.
// 
// The body of the POST will contain JSON formatted as such:

// {
//   "summary": "Standard Invoice",
//   "value": {
//     "invoiceHash": "PEx8bNFcEMEpHzUVvQntQI6ot8eFqTT/l59b+H1HqX4=",
//     "uuid": "16e78469-64af-406d-9cfd-895e724198f0",
//     "invoice": "PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4KPEl....."
//   }
// }

// The above JSON is created from the signed XML invoice, such as the following:

// *** Look at the above base64 data for the invoiceHash and uuid.  These values are found in the invoice as shown below.
// *** We'll write code to load the signed invoice into a Chilkat XML object, grab the invoice hash and the uuid,
// *** and then construct the above JSON, which will then be sent in a POST.  (See below...)

// <?xml version="1.0" encoding="UTF-8"?>
// <Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2" xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2" xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2" xmlns:ext="urn:oasis:names:specification:ubl:schema:xsd:CommonExtensionComponents-2"><ext:UBLExtensions>
//     <ext:UBLExtension>
//         <ext:ExtensionURI>urn:oasis:names:specification:ubl:dsig:enveloped:xades</ext:ExtensionURI>
//         <ext:ExtensionContent>
//             <!-- Please note that the signature values are sample values only -->
//             <sig:UBLDocumentSignatures xmlns:sig="urn:oasis:names:specification:ubl:schema:xsd:CommonSignatureComponents-2" xmlns:sac="urn:oasis:names:specification:ubl:schema:xsd:SignatureAggregateComponents-2" xmlns:sbc="urn:oasis:names:specification:ubl:schema:xsd:SignatureBasicComponents-2">
//                 <sac:SignatureInformation>
//                     <cbc:ID>urn:oasis:names:specification:ubl:signature:1</cbc:ID>
//                     <sbc:ReferencedSignatureID>urn:oasis:names:specification:ubl:signature:Invoice</sbc:ReferencedSignatureID>
//                     <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#" Id="signature">
//                         <ds:SignedInfo>
//                             <ds:CanonicalizationMethod Algorithm="http://www.w3.org/2006/12/xml-c14n11"/>
//                             <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha256"/>
//                             <ds:Reference Id="invoiceSignedData" URI="">
//                                 <ds:Transforms>
//                                     <ds:Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116">
//                                         <ds:XPath>not(//ancestor-or-self::ext:UBLExtensions)</ds:XPath>
//                                     </ds:Transform>
//                                     <ds:Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116">
//                                         <ds:XPath>not(//ancestor-or-self::cac:Signature)</ds:XPath>
//                                     </ds:Transform>
//                                     <ds:Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116">
//                                         <ds:XPath>not(//ancestor-or-self::cac:AdditionalDocumentReference[cbc:ID='QR'])</ds:XPath>
//                                     </ds:Transform>
//                                     <ds:Transform Algorithm="http://www.w3.org/2006/12/xml-c14n11"/>
//                                 </ds:Transforms>
//                                 <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
//                                 <ds:DigestValue>PEx8bNFcEMEpHzUVvQntQI6ot8eFqTT/l59b+H1HqX4=</ds:DigestValue>
//                             </ds:Reference>
//                             <ds:Reference Type="http://www.w3.org/2000/09/xmldsig#SignatureProperties" URI="#xadesSignedProperties">
//                                 <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
//                                 <ds:DigestValue>ZDEyMDUyODJjYzk4MGViNTJhNmYzMGIyZTgxODhkY2JlOWEzNmRiMTFlZTVhMDAxNjk5OTRkYTg3ODhlY2ZiMw==</ds:DigestValue>
//                             </ds:Reference>
//                         </ds:SignedInfo>
// ...
// ...
// ...
//         </ext:ExtensionContent>
//     </ext:UBLExtension>
// </ext:UBLExtensions>
//     
//     <cbc:ProfileID>reporting:1.0</cbc:ProfileID>
//     <cbc:ID>SME00062</cbc:ID>
//     <cbc:UUID>16e78469-64af-406d-9cfd-895e724198f0</cbc:UUID>
//     <cbc:IssueDate>2022-03-13</cbc:IssueDate>
//     <cbc:IssueTime>14:40:40</cbc:IssueTime>
//     <cbc:InvoiceTypeCode name="0111010">388</cbc:InvoiceTypeCode>
// ...
// ...
// ...
//     </cac:InvoiceLine>
// </Invoice>

// -------------------------------------------------------------------
// First, let's load our signed XML into a Chilkat XML object so we can get the uuid and invoice hash.
signedXmlFilePath := 'qa_data/zatca/http_post_clearance/sample_signed_invoice.xml';

signedXml := TChilkatXml.Create(Self);
success := signedXml.LoadXmlFile(signedXmlFilePath);
if (success = 0) then
  begin
    Memo1.Lines.Add(signedXml.LastErrorText);
    Exit;
  end;

invoiceHash := signedXml.GetChildContent('ext:UBLExtensions|ext:UBLExtension|ext:ExtensionContent|sig:UBLDocumentSignatures|sac:SignatureInformation|ds:Signature|ds:SignedInfo|ds:Reference[0]|ds:DigestValue');
Memo1.Lines.Add('invoiceHash: ' + invoiceHash);

cbc_UUID := signedXml.GetChildContent('cbc:UUID');
Memo1.Lines.Add('UUID: ' + cbc_UUID);

// The Chilkat XML object was used purely for getting the above 2 values.
// We must send the EXACT signed XML in base64 format.  Therefore, we should load the signed XML into a Chilkat BinData and get it in base64 single-line format.

bd := TChilkatBinData.Create(Self);
success := bd.LoadFile(signedXmlFilePath);
base64Invoice := bd.GetEncoded('base64');

// OK, let's build the JSON that will be in the HTTP POST body.
json := TChilkatJsonObject.Create(Self);
json.UpdateString('summary','Standard Invoice');
json.UpdateString('value.invoiceHash',invoiceHash);
json.UpdateString('value.uuid',cbc_UUID);
json.UpdateString('value.invoice',base64Invoice);

// Now create the HTTP object and send the POST.
http := TChilkatHttp.Create(Self);

// We'll want HTTP basic authentication.
http.BasicAuth := 1;
http.Login := 'your login';
http.Password := 'your password';

resp := http.PostJson3('https://gw-fatoora.zatca.sa/e-invoicing/simulation/invoices/clearance/single','application/json',json.ControlInterface);
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

// Check the response status code.  A 200 or 202 indicates success..
statusCode := resp.StatusCode;
Memo1.Lines.Add('Response status code = ' + IntToStr(statusCode));

// Examine the response, which is JSON.
jsonResp := TChilkatJsonObject.Create(Self);
resp.GetBodyJson(jsonResp.ControlInterface);
jsonResp.EmitCompact := 0;
Memo1.Lines.Add('JSON Response:');
Memo1.Lines.Add(jsonResp.Emit());

// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON
end;