Add a Path Substitution Parameter to a REST Request

See more REST Examples

Demonstrates Rest.AddPathParam, which adds or replaces a path-substitution parameter. Before a request is sent, each occurrence of the name in the URI path is replaced with its value.

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Rest;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  rest: TRest;
  bTls: Boolean;
  bAutoReconnect: Boolean;
  responseText: string;

begin
  success := False;

  rest := TRest.Create;

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

  //  Add path-substitution parameters.  Before a request is sent, each occurrence of the name in the
  //  URI path is replaced with the value.  This keeps the path template readable.
  rest.AddPathParam('{userId}','12345');
  rest.AddPathParam('{orderId}','98765');

  //  The placeholders in the path are replaced before the request is sent.
  responseText := rest.FullRequestNoBody('GET','/users/{userId}/orders/{orderId}');
  if (rest.LastMethodSuccess = False) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;
  WriteLn(responseText);


  rest.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.