(Delphi DLL) HTTP PUT JSON

Demonstrates how to send a JSON PUT and get the JSON response body.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
req: HCkHttpRequest;
http: HCkHttp;
jsonText: PWideChar;
resp: HCkHttpResponse;

begin
success := False;

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

req := CkHttpRequest_Create();
http := CkHttp_Create();

// The PUT request to be sent will look like this:

// PUT /request HTTP/1.1
// Content-Type: application/jsonrequest
// Cookie: JSESSIONID=1234
// Content-Encoding: identity
// Host: json.penzance.org
// Accept: application/jsonrequest
// Accept-Encoding:
// Content-Length: 72
// 
// {"user":"doctoravatar@penzance.com","forecast":7,"t":"vlIj","zip":94089}

// First, remove default header fields that would be automatically
// sent.  (These headers are harmless, and shouldn't need to 
// be suppressed, but just in case...)
CkHttp_putAcceptCharset(http,'');
CkHttp_putUserAgent(http,'');
CkHttp_putAcceptLanguage(http,'');

// Suppress the Accept-Encoding header by disallowing 
// a gzip response:
CkHttp_putAllowGzip(http,False);

// If a Cookie needs to be added...
CkHttp_SetRequestHeader(http,'Cookie','JSESSIONID=1234');

// Add the Content-Encoding: identity header.
CkHttp_SetRequestHeader(http,'Content-Encoding','identity');

// Modify the default "Accept" header:
CkHttp_putAccept(http,'application/jsonrequest');

jsonText := '{"user":"doctoravatar@penzance.com","forecast":7,"t":"vlIj","zip":94089}';

// IMPORTANT: Make sure to change the URL, JSON text,
// and other data items to your own values.  The URL used
// in this example will not actually work.

resp := CkHttpResponse_Create();
success := CkHttp_HttpStr(http,'PUT','http://json.penzance.org/request',jsonText,'utf-8','application/jsonrequest',resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

Memo1.Lines.Add('Response status code: ' + IntToStr(CkHttpResponse_getStatusCode(resp)));
Memo1.Lines.Add('Response JSON:');
Memo1.Lines.Add(CkHttpResponse__bodyStr(resp));

CkHttpRequest_Dispose(req);
CkHttp_Dispose(http);
CkHttpResponse_Dispose(resp);

end;