Pascal (Lazarus/Delphi)

AzureWebsites OAuth2 Password Flow

See more OAuth2 Examples

Demonstrates how to do OAuth 2.0 password flow for azurewebsites.net. Pascal (Lazarus/Delphi)

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.Http,
  Chilkat.HttpRequest,
  Chilkat.HttpResponse,
  Chilkat.StringBuilder,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  req: THttpRequest;
  tokenEndpoint: string;
  resp: THttpResponse;
  sbResponseBody: TStringBuilder;
  jResp: TJsonObject;
  respStatusCode: Integer;
  sbXml: TStringBuilder;
  destUrl: string;

begin
  success := False;

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

  http := THttp.Create;

  req := THttpRequest.Create;
  req.HttpVerb := 'POST';
  req.Path := '/token';
  req.ContentType := 'application/x-www-form-urlencoded';
  req.AddParam('grant_type','password');
  req.AddParam('username','your_username');
  req.AddParam('password','your_password');

  tokenEndpoint := 'https://your_api.azurewebsites.net/token';

  resp := THttpResponse.Create;
  success := http.HttpReq(tokenEndpoint,req,resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  sbResponseBody := TStringBuilder.Create;
  resp.GetBodySb(sbResponseBody);
  jResp := TJsonObject.Create;
  jResp.LoadSb(sbResponseBody);
  jResp.EmitCompact := False;

  WriteLn('Response Body:');
  WriteLn(jResp.Emit());

  //  Sample JSON response:

  //  {
  //    "access_token": "NQGHn ... xTS",
  //    "token_type": "bearer",
  //    "expires_in": 1209599,
  //    "userName": "your_username",
  //    ".issued": "Mon, 27 Apr 2020 23:49:35 GMT",
  //    ".expires": "Mon, 11 May 2020 23:49:35 GMT"
  //  }

  respStatusCode := resp.StatusCode;
  WriteLn('Response Status Code = ' + respStatusCode);
  if (respStatusCode >= 400) then
    begin
      WriteLn('Response Header:');
      WriteLn(resp.Header);
      WriteLn('Failed.');
      Exit;
    end;

  //  ----------------------------------
  //  Use the OAuth2 token in a request.
  //  For example...

  sbXml := TStringBuilder.Create;
  success := sbXml.LoadFile('c:/someDir/someXmlFile.xml','utf-8');
  if (success = False) then
    begin
      WriteLn('Failed to load the XML file.');
      Exit;
    end;

  //  Get the OAuth2 token and use it for authentication
  http.AuthToken := jResp.StringOf('token');

  destUrl := 'https://your_api.azurewebsites.net/destinationUrl';
  success := http.HttpSb('POST',destUrl,sbXml,'utf-8','application/xml',resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  respStatusCode := resp.StatusCode;
  WriteLn('Response Status Code = ' + respStatusCode);
  if (respStatusCode >= 400) then
    begin
      WriteLn('Response Header:');
      WriteLn(resp.Header);
      WriteLn('Failed.');
      Exit;
    end;

  //  Examine the response body
  WriteLn(resp.BodyStr);


  http.Free;
  req.Free;
  resp.Free;
  sbResponseBody.Free;
  jResp.Free;
  sbXml.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.