Dart

Amazon Translate Text

See more AWS Translate Examples

Demonstrates how to use the AWS Translate service to translate text from one language to another. Dart

import 'package:chilkat/chilkat.dart';

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

  final rest = CkRest();

  final authAws = CkAuthAws();
  authAws.accessKey = 'AWS_ACCESS_KEY';
  authAws.secretKey = 'AWS_SECRET_KEY';
  authAws.region = 'us-west-2';
  authAws.serviceName = 'translate';
  rest.setAuthAws(authAws);

  // URL: https://translate.us-west-2.amazonaws.com/
  final bTls = true;
  final port = 443;
  final bAutoReconnect = true;
  try {
    rest.connect('translate.us-west-2.amazonaws.com', port, bTls, bAutoReconnect);
  } on ChilkatException catch (e) {
    print('ConnectFailReason: ${rest.connectFailReason}');
    print(e.lastErrorText);
    return;
  }

  // Translate text from English to German
  final json = CkJsonObject();
  json.updateString('SourceLanguageCode', 'en');
  json.updateString('TargetLanguageCode', 'de');
  json.updateString('Text', 'This is the text to be translated');

  rest.addHeader('Content-Type', 'application/x-amz-json-1.1');
  rest.addHeader('X-Amz-Target', 'AWSShineFrontendService_20170701.TranslateText');

  final sbRequestBody = CkStringBuilder();
  json.emitSb(sbRequestBody);
  final sbResponseBody = CkStringBuilder();
  try {
    rest.fullRequestSb('POST', '/', sbRequestBody, sbResponseBody);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final respStatusCode = rest.responseStatusCode;
  if (respStatusCode >= 400) {
    print('Response Status Code = $respStatusCode');
    print('Response Header:');
    print(rest.responseHeader);
    print('Response Body:');
    print(sbResponseBody.getAsString());
    return;
  }

  final jsonResponse = CkJsonObject();
  jsonResponse.loadSb(sbResponseBody);
  jsonResponse.emitCompact = false;

  print(jsonResponse.emit());

  // {
  //   "SourceLanguageCode": "en",
  //   "TargetLanguageCode": "de",
  //   "TranslatedText": "Dies ist der zu �bersetzende Text"
  // }

  print(jsonResponse.stringOf('TranslatedText'));
}