Delphi DLL

QuickDeleteStr Example

Sends a DELETE request to a URL. The URL can potentially include params, and custom request headers can be added. Delphi DLL

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: HCkHttp;
statusCode: Integer;
url: PWideChar;
reponseBodyStr: PWideChar;

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

http := CkHttp_Create();

// Specifiy a session log file so we can see the exact request/response
CkHttp_putSessionLogFilename(http,'c:/aaworkarea/sessionLog.txt');

// Perhaps add a custom header or two..
CkHttp_SetRequestHeader(http,'x-exz-date','20201012T235046Z');
CkHttp_SetRequestHeader(http,'x-exz-id','1234');

// Send a DELETE request to https://www.example.com/someting?param1=123&param2=abc
url := 'https://www.example.com/someting?param1=123&param2=abc';
reponseBodyStr := CkHttp__quickDeleteStr(http,url);
if (CkHttp_getLastMethodSuccess(http) = False) then
  begin
    // This will happen if the response status code was 400 or greater,
    // or if the request could not be sent, or if no response was received.
    statusCode := CkHttp_getLastStatus(http);
    Memo1.Lines.Add('Response status: ' + IntToStr(statusCode));

    if (statusCode = 0) then
      begin
        // There was an error in communications.  
        Memo1.Lines.Add(CkHttp__lastErrorText(http));
      end
    else
      begin
        // We received a response status code indicating failure.
        // Examine the response body.
        Memo1.Lines.Add(CkHttp__lastResponseBody(http));
      end;

    Exit;
  end;

// The DELETE request that is sent looks like this.
// The Accept and Accept-Encoding headers are automatically added by default.

// 	DELETE /someting?param1=123&param2=abc HTTP/1.1
// 	Host: www.example.com
// 	Accept: */*
// 	Accept-Encoding: gzip
// 	x-exz-date: 20201012T235046Z
// 	x-exz-id: 1234

// Get the response status
statusCode := CkHttp_getLastStatus(http);
Memo1.Lines.Add('Response status: ' + IntToStr(statusCode));

// Show the response body
Memo1.Lines.Add(reponseBodyStr);

CkHttp_Dispose(http);

end;