package io.lumify.translator.bing;
import com.google.inject.Inject;
import io.lumify.core.config.Configuration;
import io.lumify.core.exception.LumifyException;
import io.lumify.core.ingest.graphProperty.GraphPropertyWorkData;
import io.lumify.core.util.LumifyLogger;
import io.lumify.core.util.LumifyLoggerFactory;
import io.lumify.translate.Translator;
import org.apache.commons.io.IOUtils;
import org.json.JSONObject;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.Calendar;
import java.util.Date;
public class BingTranslator implements Translator {
private static final LumifyLogger LOGGER = LumifyLoggerFactory.getLogger(BingTranslator.class);
private Configuration configuration;
private Date tokenExpiresDate;
private String accessToken;
@Override
public String translate(String text, String language, GraphPropertyWorkData data) {
ensureUpToDateToken();
try {
LOGGER.debug("Translating text: %s %s", data.getElement().getId(), data.getProperty().toString());
String urlString = "http://api.microsofttranslator.com/V2/Ajax.svc/Translate";
urlString += "?to=en";
urlString += "&text=" + URLEncoder.encode(text.substring(0, Math.min(text.length(), 10000)), "utf-8");
URL url = new URL(urlString);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setRequestProperty("Authorization", "Bearer " + accessToken);
String translatedText = IOUtils.toString(connection.getInputStream(), "UTF-8");
return translatedText;
} catch (Exception ex) {
throw new LumifyException("Could not translate text", ex);
}
}
private void ensureUpToDateToken() {
if (tokenExpiresDate != null && tokenExpiresDate.compareTo(new Date()) > 0) {
return;
}
try {
String clientId = this.configuration.get("translator.bing.clientId");
String clientSecret = this.configuration.get("translator.bing.clientSecret");
String scope = "http://api.microsofttranslator.com";
String grantType = "client_credentials";
String urlString = "https://datamarket.accesscontrol.windows.net/v2/OAuth2-13";
String formData = "client_id=" + URLEncoder.encode(clientId, "utf-8");
formData += "&client_secret=" + URLEncoder.encode(clientSecret, "utf-8");
formData += "&scope=" + URLEncoder.encode(scope, "utf-8");
formData += "&grant_type=" + URLEncoder.encode(grantType, "utf-8");
URL url = new URL(urlString);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setInstanceFollowRedirects(true);
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.setRequestProperty("Content-Length", Long.toString(formData.getBytes().length));
connection.getOutputStream().write(formData.getBytes());
String results = IOUtils.toString(connection.getInputStream(), "UTF-8");
JSONObject json = new JSONObject(results);
accessToken = json.getString("access_token");
int expiresIn = json.getInt("expires_in");
Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.SECOND, expiresIn);
tokenExpiresDate = calendar.getTime();
} catch (Exception ex) {
throw new LumifyException("Could not refresh the token", ex);
}
}
@Inject
public void setConfiguration(Configuration configuration) {
this.configuration = configuration;
}
}