GetURL

 

import android.content.Context;
import android.os.AsyncTask;
import android.util.Log;
import android.util.Patterns;
import android.webkit.URLUtil;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

/**
 * Created by thiago.domacoski on 06/01/17.
 */

public class LoaderPreview extends AsyncTask<String, Void, LoaderPreview.ObjectPreview> {



    private final Context mContext;
    private final MainActivity.PreviewViewHolder mHolder;

    public LoaderPreview(final Context mContext, final MainActivity.PreviewViewHolder mHolder){
        this.mContext = mContext;
        this.mHolder = mHolder;
    }

    @Override
    protected ObjectPreview doInBackground(String... strings) {
        if(null == strings || 0 == strings.length){
            return null;
        }
        String title = null;

        String url = strings[0];
        if(null == url){
            return null;
        }
        if(!isValidURL(url)){
            final String[] values = url.split("http");
            final String clean = values[1];
            title = values[0];
            final String cleanUrl = "http" + clean;
            if(!isValidURL(cleanUrl)){
                return null;
            }else{
                url  = cleanUrl;
            }
        }
        try {


            final Document doc = Jsoup.connect(url).get();
            Log.i("DOCUMENT", doc.toString());
            Elements itens = doc.select("meta[property^=og:]");

            if (itens.size() == 0) {
                return null;
            }

            final ObjectPreview objectPreview = new ObjectPreview();
            objectPreview.url = url;

            for (int i = 0; i < itens.size(); i++) {
                Element tag = itens.get(i);

                String text = tag.attr("property");
                if ("og:image".equals(text)) {
                    objectPreview.image = tag.attr("content");
                } else if ("og:description".equals(text)) {
                    objectPreview.description = tag.attr("content");
                } else if ("og:title".equals(text)) {
                    objectPreview.title = tag.attr("content");
                }
            }

            if(title != null){
                objectPreview.description = new String(objectPreview.title);
                objectPreview.title = title;
            }

            return objectPreview;


        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }


    private boolean isValidURL(String urlString) {
        try {
            final URL url = new URL(urlString);
            return URLUtil.isValidUrl(urlString) && Patterns.WEB_URL.matcher(urlString).matches();
        } catch (MalformedURLException e) {
            return false;
        }
    }


    @Override
    protected void onPostExecute(ObjectPreview objectPreview) {
        if(objectPreview != null){
            this.mHolder.setObject(objectPreview);
        }
    }

    public static class ObjectPreview {
        public String title;
        public String description;
        public String image;
        public String url;
    }
}