(Delphi ActiveX) ETrade OAuth1 Authorization (3-legged) Step 1

Demonstrates the first step in 3-legged OAuth1 authorization for the ETrade REST API. This example sends an HTTP request to the "request token URL" to get a request token that begins the OAuth1 process. (See https://apisb.etrade.com/docs/api/authorization/request_token.html )

This example uses the sandbox request token URL. The live request token URL would be "https://api.etrade.com/oauth/request_token".

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
consumerKey: WideString;
consumerSecret: WideString;
requestTokenUrl: WideString;
http: TChilkatHttp;
success: Integer;
resp: IChilkatHttpResponse;
hashTab: TChilkatHashtable;
requestToken: WideString;
requestTokenSecret: WideString;
json: TChilkatJsonObject;
fac: TCkFileAccess;
authorizeUrl: WideString;
sbUrlForBrowser: TChilkatStringBuilder;
url: WideString;

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

consumerKey := 'ETRADE_CONSUMER_KEY';
consumerSecret := 'ETRADE_CONSUMER_SECRET';

// Note: This example uses the sandbox request token URL.
// The live Get Request Token Request URL is:
// https://api.etrade.com/oauth/request_token
// This example will use the Sandbox Token Request URL:
requestTokenUrl := 'https://apisb.etrade.com/oauth/request_token';

http := TChilkatHttp.Create(Self);
success := 1;

http.OAuth1 := 1;
http.OAuthConsumerKey := consumerKey;
http.OAuthConsumerSecret := consumerSecret;
http.OAuthCallback := 'oob';

resp := http.QuickGetObj(requestTokenUrl);
if (http.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

// If successful, the resp.BodyStr contains something like this:  
// oauth_token=-Wa_KwAAAAAAxfEPAAABV8Qar4Q&oauth_token_secret=OfHY4tZBX2HK4f7yIw76WYdvnl99MVGB&oauth_callback_confirmed=true
Memo1.Lines.Add(resp.BodyStr);

hashTab := TChilkatHashtable.Create(Self);
hashTab.AddQueryParams(resp.BodyStr);

requestToken := hashTab.LookupStr('oauth_token');
requestTokenSecret := hashTab.LookupStr('oauth_token_secret');
http.OAuthTokenSecret := requestTokenSecret;

Memo1.Lines.Add('oauth_token = ' + requestToken);
Memo1.Lines.Add('oauth_token_secret = ' + requestTokenSecret);

// Save this request token for the next step..
json := TChilkatJsonObject.Create(Self);
json.AppendString('oauth_token',requestToken);
json.AppendString('oauth_token_secret',requestTokenSecret);

fac := TCkFileAccess.Create(Self);
fac.WriteEntireTextFile('qa_data/tokens/etrade_request_token.json',json.Emit(),'utf-8',0);

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

// The next step is to form a URL to send to the authorizeUrl
// This is an HTTP GET that we load into a popup browser.
authorizeUrl := 'https://us.etrade.com/e/t/etws/authorize';

sbUrlForBrowser := TChilkatStringBuilder.Create(Self);
sbUrlForBrowser.Append(authorizeUrl);
sbUrlForBrowser.Append('?key=');
sbUrlForBrowser.Append(consumerKey);
sbUrlForBrowser.Append('&token=');
sbUrlForBrowser.Append(requestToken);
url := sbUrlForBrowser.GetAsString();

// At this point, your application should load the URL in a browser.
// For example, 
// in C#: System.Diagnostics.Process.Start(url);
// in Java: Desktop.getDesktop().browse(new URI(url));
// in VBScript: Set wsh=WScript.CreateObject("WScript.Shell")
//              wsh.Run url
// in Xojo: ShowURL(url)  (see http://docs.xojo.com/index.php/ShowURL)
// in Dataflex: Runprogram Background "c:\Program Files\Internet Explorer\iexplore.exe" sUrl        
// The Microsoft account owner would interactively accept or deny the authorization request.

// Add the code to load the url in a web browser here...
// Add the code to load the url in a web browser here...
// Add the code to load the url in a web browser here...

// The ETrade account owner will login and grant access to the application.
// A short verifier code will be displayed (as shown below), and this must be copy-and-pasted
// into the next step to Complete the 3-legged OAuth1 Authorization 

// Note: The browser will NOT automatically direct you to the next page.
// You should copy the verifier code, close the browser, and then paste the verifier
// code into your application.

// 
end;