Delphi ActiveX

Connect to a REST Server

Demonstrates Rest.Connect, which establishes the initial TCP (and optionally TLS) connection to a REST server. The example connects over HTTPS and then reuses the connection for a request.

Background. A single connection can serve many requests to the same host. The TLS argument should be _TRUE_ for HTTPS (typically port 443), and automatic reconnection lets Chilkat transparently re-establish a dropped keep-alive connection.

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var
success: Integer;
rest: TChilkatRest;
bTls: Integer;
bAutoReconnect: Integer;
responseText: WideString;

begin
success := 0;

rest := TChilkatRest.Create(Self);

//  Connect to the REST server.  The 3rd argument enables TLS (use 1 for HTTPS on port 443),
//  and the 4th enables automatic reconnection if the connection is dropped between requests.
bTls := 1;
bAutoReconnect := 1;
success := rest.Connect('example.com',443,bTls,bAutoReconnect);
if (success = 0) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

//  The connection is now established and ready for requests.  A single connection can be reused for
//  many requests to the same server.
responseText := rest.FullRequestNoBody('GET','/api/status');
if (rest.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add(responseText);