Delphi DLL

HTTP POST with XML Body

Demonstrates sending an HTTP POST with a XML body. 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, Xml;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
xml: HCkXml;
sbRequestBody: HCkStringBuilder;
resp: HCkHttpResponse;

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 -X POST https://example.com/StockQuote \
//   -H "Host: www.example.org" \
//   -H "Content-Type: application/soap+xml; charset=utf-8" \
//   -H "SOAPAction: http://www.example.org/StockPrice" \
//   -d '<?xml version="1.0"?>
// 
// <soap:Envelope
// xmlns:soap="http://www.w3.org/2003/05/soap-envelope/"
// soap:encodingStyle="http://www.w3.org/2003/05/soap-encoding">
// 
// <soap:Body xmlns:m="http://www.example.org/stock">
//   <m:GetStockPrice>
//     <m:StockName>IBM</m:StockName>
//   </m:GetStockPrice>
// </soap:Body>
// 
// </soap:Envelope>'

// Use the following online tool to generate HTTP code from a CURL command
// Convert a cURL Command to HTTP Source Code

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

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

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

// <?xml version="1.0" encoding="utf-8"?>
// <soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope/" soap:encodingStyle="http://www.w3.org/2003/05/soap-encoding">
//     <soap:Body xmlns:m="http://www.example.org/stock">
//         <m:GetStockPrice>
//             <m:StockName>IBM</m:StockName>
//         </m:GetStockPrice>
//     </soap:Body>
// </soap:Envelope>
// 

xml := CkXml_Create();
CkXml_putTag(xml,'soap:Envelope');
CkXml_AddAttribute(xml,'xmlns:soap','http://www.w3.org/2003/05/soap-envelope/');
CkXml_AddAttribute(xml,'soap:encodingStyle','http://www.w3.org/2003/05/soap-encoding');
CkXml_UpdateAttrAt(xml,'soap:Body',True,'xmlns:m','http://www.example.org/stock');
CkXml_UpdateChildContent(xml,'soap:Body|m:GetStockPrice|m:StockName','IBM');

CkHttp_SetRequestHeader(http,'SOAPAction','http://www.example.org/StockPrice');
CkHttp_SetRequestHeader(http,'Host','www.example.org');
CkHttp_SetRequestHeader(http,'Content-Type','application/soap+xml; charset=utf-8');

sbRequestBody := CkStringBuilder_Create();
CkXml_GetXmlSb(xml,sbRequestBody);

resp := CkHttpResponse_Create();
success := CkHttp_HttpSb(http,'POST','https://example.com/StockQuote',sbRequestBody,'utf-8','application/soap+xml; charset=utf-8',resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

Memo1.Lines.Add(IntToStr(CkHttpResponse_getStatusCode(resp)));
Memo1.Lines.Add(CkHttpResponse__bodyStr(resp));

CkHttp_Dispose(http);
CkXml_Dispose(xml);
CkStringBuilder_Dispose(sbRequestBody);
CkHttpResponse_Dispose(resp);

end;