Dart Requires Chilkat v11.0.0+

ETrade OAuth1 Authorization (3-legged) Step 1

See more ETrade Examples

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".

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final consumerKey = 'ETRADE_CONSUMER_KEY';
  final 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:
  final requestTokenUrl = 'https://apisb.etrade.com/oauth/request_token';

  final http = CkHttp();

  http.oAuth1 = true;
  http.oAuthConsumerKey = consumerKey;
  http.oAuthConsumerSecret = consumerSecret;
  http.oAuthCallback = 'oob';

  final resp = CkHttpResponse();
  try {
    http.httpNoBody('GET', requestTokenUrl, resp);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

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

  final hashTab = CkHashtable();
  hashTab.addQueryParams(resp.bodyStr);

  final requestToken = hashTab.lookupStr('oauth_token');
  final requestTokenSecret = hashTab.lookupStr('oauth_token_secret');
  http.oAuthTokenSecret = requestTokenSecret;

  print('oauth_token = $requestToken');
  print('oauth_token_secret = $requestTokenSecret');

  // Save this request token for the next step..
  final json = CkJsonObject();
  json.appendString('oauth_token', requestToken);
  json.appendString('oauth_token_secret', requestTokenSecret);

  final fac = CkFileAccess();
  fac.writeEntireTextFile('qa_data/tokens/etrade_request_token.json', json.emit(), 'utf-8', false);

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

  // 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.
  final authorizeUrl = 'https://us.etrade.com/e/t/etws/authorize';

  final sbUrlForBrowser = CkStringBuilder();
  sbUrlForBrowser.append(authorizeUrl);
  sbUrlForBrowser.append('?key=');
  sbUrlForBrowser.append(consumerKey);
  sbUrlForBrowser.append('&token=');
  sbUrlForBrowser.append(requestToken);
  final url = sbUrlForBrowser.getAsString();

  // Launch the system's default browser navigated to the URL.
  final oauth2 = CkOAuth2();
  try {
    oauth2.launchBrowser(url);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // 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.

  // 
}