Delphi ActiveX Requires Chilkat v11.0.0+

Example: Http.HttpSb method

Shows how to use the HttpSb method to send an HTTP POST request with a StringBuilder as the request body. The example sends the following request:

POST /echo_request_body.asp HTTP/1.1
Host: chilkatsoft.com
Accept: */*
Accept-Encoding: gzip
Content-Type: application/json
Content-Length: 26

{"greeting":"Hello World"}

Also see: Chilkat Http Default and Auto-Filled Headers

Delphi ActiveX

var
success: Integer;
http: TChilkatHttp;
sb: TChilkatStringBuilder;
url: WideString;
resp: TChilkatHttpResponse;

begin
success := 0;

http := TChilkatHttp.Create(Self);
success := 0;

sb := TChilkatStringBuilder.Create(Self);
sb.Append('{"greeting":"Hello World"}');

//  This URL echoes the contents of the request body, letting us view it.
url := 'https://chilkatsoft.com/echo_request_body.asp';

//  Send a POST with the contents of the StringBuilder in the HTTP request body.
resp := TChilkatHttpResponse.Create(Self);
success := http.HttpSb('POST',url,sb.ControlInterface,'utf-8','application/json',resp.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('Response Status Code: ' + IntToStr(resp.StatusCode));

//  Examine the request we sent.
//  The LastHeader property stores the HTTP request header of the most recent request sent,
//  and in this instance, the response body mirrors the request body.
Memo1.Lines.Add(http.LastHeader);
Memo1.Lines.Add(resp.BodyStr);

//  Output:

//  POST /echo_request_body.asp HTTP/1.1
//  Host: chilkatsoft.com
//  Accept: */*
//  Accept-Encoding: gzip
//  Content-Type: application/json
//  Content-Length: 26
//  
//  {"greeting":"Hello World"}