Pircbot + Jsoup + json-simple = oEmbed Awesome

import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.jibble.pircbot.PircBot;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.jsoup.Connection;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

public class InfoBot extends PircBot {
    private final Pattern urlPattern;

    public InfoBot() throws Exception {
        this.urlPattern = Pattern.compile("(https?://[^\\s]+)");
        this.setName("ExampleBot");
        this.setVerbose(true);
        this.connect("irc.efnet.nl");
        this.joinChannel("#example");
    }

    public void onMessage(final String channel, final String sender, final String login, final String hostname, final String message) {
        final Matcher matcher = this.urlPattern.matcher(message);
        while (matcher.find()) {
            final String match = matcher.group();
            try {
                final Connection connection = Jsoup.connect(match);
                final Document document = connection.get();
                final Elements elements = document.select("link[type=application/json+oembed]");
                final Element element = elements.first();
                final String href = element.attr("href");
                final URL url = new URL(href);
                final URLConnection urlConnection = url.openConnection();
                final InputStream inputStream = urlConnection.getInputStream();
                final InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
                final JSONParser parser = new JSONParser();
                final JSONObject object = (JSONObject) parser.parse(inputStreamReader);
                final String authorName = (String) object.get("author_name");
                final String providerName = (String) object.get("provider_name");
                final String title = (String) object.get("title");
                final String type = (String) object.get("type");
                final String post = String.format("%s %s by %s: %s", providerName, type, authorName, title);
                this.sendMessage(channel, post);
            } catch (final Exception exception) {
                exception.printStackTrace();
            }
        }
    }

    public static void main(final String[] args) throws Exception {
        final InfoBot infoBot = new InfoBot();
    }
}