Delphi ActiveX Requires Chilkat v11.0.0+

HTTP Methods - GET and DELETE

Demonstrate a method for sending HTTP requests that don't have a request body, such as for GET or DELETE requests. Delphi ActiveX

var
success: Integer;
http: TChilkatHttp;
url: WideString;
resp: TChilkatHttpResponse;
statusCode: Integer;

begin
success := 0;

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

http := TChilkatHttp.Create(Self);

//  Specifiy a session log file so we can see the exact request/response
http.SessionLogFilename := 'c:/aaworkarea/sessionLog.txt';

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

//  Send a GET request to https://www.example.com/someting?param1=123&param2=abc
url := 'https://www.example.com/someting?param1=123&param2=abc';
resp := TChilkatHttpResponse.Create(Self);
success := http.HttpNoBody('GET',url,resp.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

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

//  	GET /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 := resp.StatusCode;
Memo1.Lines.Add('Response status: ' + IntToStr(statusCode));

//  Get the response body
Memo1.Lines.Add(resp.BodyStr);

//  -------------------------------------------------------------
//  Let's say we want to send a DELETE request, and we only want to accept an application/json response,
//  and we don't want gzipped responses...

//  First remove the previously specified custom headers.
http.ClearHeaders();

//  Indicate we only accept application/json non-gzipped responses.
http.Accept := 'application/json';
http.AllowGzip := 0;

//  Send a DELETE request to https://www.example.com/deleteSomething
url := 'https://www.example.com/deleteSomething';
success := http.HttpNoBody('DELETE',url,resp.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

//  The DELETE request that is sent looks like this.
//  The empty Accept-Encoding header value means we only want non-compressed responses.

//  	DELETE /deleteSomething HTTP/1.1
//  	Host: www.example.com
//  	Accept: application/json
//  	Accept-Encoding: 

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

//  Get the response body
Memo1.Lines.Add(resp.BodyStr);