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org.bukkit.craftbukkit.util.MojangNameLookup Maven / Gradle / Ivy

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package org.bukkit.craftbukkit.util;

import com.google.common.base.Charsets;
import com.google.gson.Gson;
import org.apache.commons.io.IOUtils;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.UUID;

public class MojangNameLookup {
  private static final Logger logger = LogManager.getFormatterLogger(MojangNameLookup.class);

  public static String lookupName(UUID id) {
    if (id == null) {
      return null;
    }

    InputStream inputStream = null;
    try {
      URL url = new URL("https://sessionserver.mojang.com/session/minecraft/profile/" + id.toString().replace("-", ""));
      URLConnection connection = url.openConnection();
      connection.setConnectTimeout(15000);
      connection.setReadTimeout(15000);
      connection.setUseCaches(false);
      inputStream = connection.getInputStream();
      String result = IOUtils.toString(inputStream, Charsets.UTF_8);
      Gson gson = new Gson();
      Response response = gson.fromJson(result, Response.class);
      if (response == null || response.name == null) {
        logger.warn("Failed to lookup name from UUID");
        return null;
      }

      if (response.cause != null && response.cause.length() > 0) {
        logger.warn("Failed to lookup name from UUID: %s", response.errorMessage);
        return null;
      }

      return response.name;
    } catch (MalformedURLException ex) {
      logger.warn("Malformed URL in UUID lookup");
      return null;
    } catch (IOException ex) {
      IOUtils.closeQuietly(inputStream);
    } finally {
      IOUtils.closeQuietly(inputStream);
    }

    return null;
  }

  private class Response {
    String errorMessage;
    String cause;
    String name;
  }
}




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