Delphi DLL

Simple SOAP Request

See more HTTP Examples

Demonstrates how to send a simple SOAP request. Delphi DLL

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
xml: HCkXml;
soapRequestBody: PWideChar;
endpoint: PWideChar;
soapAction: PWideChar;
contentType: PWideChar;
http: HCkHttp;
resp: HCkHttpResponse;
responseXml: HCkXml;
statusCode: Integer;
dat_NumberToDollarsResult: PWideChar;

begin
success := False;

// --------------------------------------------------------------------------------
// Also see Chilkat's Online WSDL Code Generator
// to generate code and SOAP Request and Response XML for each operation in a WSDL.
// --------------------------------------------------------------------------------

// Create the following XML to be sent in the SOAP request body.

// <soapenv:Envelope xmlns:dat="http://www.dataaccess.com/webservicesserver/" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
//     <soapenv:Header/>
//     <soapenv:Body>
//         <dat:NumberToDollars>
//             <dat:dNum>99.0</dat:dNum>
//         </dat:NumberToDollars>
//     </soapenv:Body>
// </soapenv:Envelope>

xml := CkXml_Create();
CkXml_putTag(xml,'soapenv:Envelope');
CkXml_AddAttribute(xml,'xmlns:dat','http://www.dataaccess.com/webservicesserver/');
CkXml_AddAttribute(xml,'xmlns:soapenv','http://schemas.xmlsoap.org/soap/envelope/');
CkXml_UpdateChildContent(xml,'soapenv:Header','');
CkXml_UpdateChildContent(xml,'soapenv:Body|dat:NumberToDollars|dat:dNum','99.0');

// In a SOAP HTTP request, including the XML declaration (<?xml version="1.0" encoding="UTF-8"?>) in the XML body is generally not required. 
CkXml_putEmitXmlDecl(xml,False);
soapRequestBody := CkXml__getXml(xml);

endpoint := 'https://www.dataaccess.com/webservicesserver/numberconversion.wso';
soapAction := '';
//  For SOAP requests, the standard Content-Type is usually set to "text/xml" or "application/soap+xml"
contentType := 'text/xml';

http := CkHttp_Create();

CkHttp_ClearHeaders(http);
CkHttp_SetRequestHeader(http,'SOAPAction',soapAction);

resp := CkHttpResponse_Create();
success := CkHttp_HttpStr(http,'POST',endpoint,soapRequestBody,'utf-8',contentType,resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

// Get the XML response body.
responseXml := CkXml_Create();
CkHttpResponse_GetBodyXml(resp,responseXml);

statusCode := CkHttpResponse_getStatusCode(resp);
Memo1.Lines.Add('response status code: ' + IntToStr(statusCode));

// If the status code does not indicate succcess, then show the response XML,
// which probably contains error information.
if (statusCode <> 200) then
  begin
    Memo1.Lines.Add(CkXml__getXml(responseXml));
    Exit;
  end;

Memo1.Lines.Add(CkXml__getXml(responseXml));

// Parse the successful SOAP response XML.

// This is a sample of the response XML, but the namespace prefixes will be different.
// We can parse the result using "*" for the namespace prefixes (see below).

// <soapenv:Envelope xmlns:dat="http://www.dataaccess.com/webservicesserver/" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
//     <soapenv:Header/>
//     <soapenv:Body>
//         <dat:NumberToDollarsResponse>
//             <dat:NumberToDollarsResult>string</dat:NumberToDollarsResult>
//         </dat:NumberToDollarsResponse>
//     </soapenv:Body>
// </soapenv:Envelope>

dat_NumberToDollarsResult := CkXml__getChildContent(responseXml,'*:Body|*:NumberToDollarsResponse|*:NumberToDollarsResult');
Memo1.Lines.Add('result: ' + dat_NumberToDollarsResult);

CkXml_Dispose(xml);
CkHttp_Dispose(http);
CkHttpResponse_Dispose(resp);
CkXml_Dispose(responseXml);

end;