Dart

Amazon SP-API Request an LWA access token

See more Amazon SP-API Examples

Request an LWA access token, make a secure HTTP POST to the LWA authentication server (https://api.amazon.com/auth/o2/token) Dart

import 'package:chilkat/chilkat.dart';

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

  final http = CkHttp();

  // Implements the following CURL command:

  // curl -X POST https://example.com/auth/o2/token \
  //   -H "Host: api.amazon.com" \
  //   -H "Content-Type: application/x-www-form-urlencoded;charset=UTF-8" \
  //   -d "grant_type=refresh_token" \
  //   -d "refresh_token=Aztr|..." \
  //   -d "client_id=foodev" \
  //   -d "client_secret=Y76SDl2F"

  // Use the following online tool to generate HTTP code from a CURL command
  // Convert a cURL Command to HTTP Source Code

  final req = CkHttpRequest();
  req.addParam('grant_type', 'refresh_token');
  req.addParam('refresh_token', 'Aztr|...');
  req.addParam('client_id', 'foodev');
  req.addParam('client_secret', 'Y76SDl2F');

  req.addHeader('Host', 'api.amazon.com');

  req.httpVerb = 'POST';
  req.contentType = 'application/x-www-form-urlencoded';

  final resp = CkHttpResponse();
  try {
    http.httpReq('https://api.amazon.com/auth/o2/token', req, resp);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final statusCode = resp.statusCode;
  print('Status Code = $statusCode');

  final json = CkJsonObject();
  json.load(resp.bodyStr);

  json.emitCompact = false;
  print(json.emit());

  if (statusCode != 200) {
    print('Failed.');
    return;
  }

  // Success returns this JSON:

  // {
  //   "access_token": "Atza|...",
  //   "refresh_token": "Atzr|...",
  //   "token_type": "bearer",
  //   "expires_in": 3600
  // }

  // Save the JSON token to a file for use in subsequent calls.
  // (this example is passing a relative file path.  You don't need to save to a file
  // if, for example, you keep the access token in-memory for subsequent use...)
  json.writeFile('qa_data/tokens/sp_api_lwa_token.json');

  print('access_token: ${json.stringOf('access_token')}');
  print('Success.');
}