Delphi DLL

HTTP POST JSON (application/json)

See more HTTP Examples

Demonstrates how to send a JSON POST using the application/json content-type. Delphi 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 requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

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

// If any custom headers need to be included with the POST, add them
// by calling SetRequestHeader

// Note: An application should never explicitly set the Content-Length header.
// The Content-Length is automatically computed and added by Chilkat.

// Here are some examples of custom headers.  

// Perhaps your particular app needs some sort of custom-computed Authorization header...
CkHttp_SetRequestHeader(http,'Authorization','my-custom-computed-auth-value');

// Another custom header for some hypothetical app:
CkHttp_SetRequestHeader(http,'X-Pass-Timestamp','my-custom-computed-timestamp-value');

// The following "Accept" header may be set, but it really isn't necessary:
CkHttp_SetRequestHeader(http,'Accept','application/json');

jsonText := '{ some JSON text ... }';

// To use SSL/TLS, simply use "https://" in the URL.

resp := CkHttpResponse_Create();
success := CkHttp_HttpStr(http,'POST','http://www.someserver.com/someJsonEndpoint',jsonText,'utf-8','application/json',resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

// Display the JSON response.
Memo1.Lines.Add(CkHttpResponse__bodyStr(resp));

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

end;