package de.pixart.messenger.utils; import android.content.Context; import android.os.AsyncTask; import android.view.View; import org.json.JSONObject; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element; import org.jsoup.select.Elements; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStreamReader; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.UnsupportedEncodingException; import java.net.URI; import java.net.URISyntaxException; import java.net.URLEncoder; import java.util.regex.Pattern; import de.pixart.messenger.Config; /** * Created by ponna on 16-01-2018. */ public class RichPreview { public static final String RICH_LINK_METADATA = "richlink_meta_data"; private MetaData metaData; private ResponseListener responseListener; private String url; private String filename; private Context context; public RichPreview(ResponseListener responseListener) { this.responseListener = responseListener; metaData = new MetaData(); } public void getPreview(final String url, final String filename, final Context context) { this.url = url; this.filename = filename; this.context = context; new getData().execute(); } private class getData extends AsyncTask { @Override protected Void doInBackground(Void... params) { FileInputStream fis = null; ObjectInputStream is = null; final File file = new File(context.getCacheDir(), RICH_LINK_METADATA + File.separator + filename); try { fis = new FileInputStream(file); InputStreamReader isr = new InputStreamReader(fis); BufferedReader bufferedReader = new BufferedReader(isr); StringBuilder sb = new StringBuilder(); String line; while ((line = bufferedReader.readLine()) != null) { sb.append(line); } String string = sb.substring(sb.indexOf("{"), sb.lastIndexOf("}") + 1); JSONObject json = new JSONObject(string); if (json.has("url")) { metaData.setUrl(json.getString("url")); } if (json.has("imageurl")) { metaData.setImageurl(json.getString("imageurl")); } if (json.has("title")) { metaData.setTitle(json.getString("title")); } if (json.has("description")) { metaData.setDescription(json.getString("description")); } if (json.has("sitename")) { metaData.setSitename(json.getString("sitename")); } if (json.has("mediatype")) { metaData.setMediatype(json.getString("mediatype")); } if (json.has("favicon")) { metaData.setFavicon(json.getString("favicon")); } } catch (Exception e) { retrieveMeta(url, context); e.printStackTrace(); } finally { try { if (fis != null) { fis.close(); } if (is != null) { is.close(); } } catch (Exception e) { e.printStackTrace(); } } return null; } @Override protected void onPostExecute(Void aVoid) { super.onPostExecute(aVoid); responseListener.onData(metaData); } } private String resolveURL(String url, String part) { if (Patterns.AUTOLINK_WEB_URL.matcher(part).matches() && !part.contains(" ")) { return part; } else { URI base_uri = null; try { base_uri = new URI(url); } catch (URISyntaxException e) { e.printStackTrace(); } try { base_uri = base_uri != null ? base_uri.resolve(URLEncoder.encode(part, "UTF-8")) : null; } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return base_uri != null ? base_uri.toString() : null; } } private void saveMeta(MetaData metaData, Context context) { final File file = new File(context.getCacheDir(), RICH_LINK_METADATA + File.separator + filename); file.getParentFile().mkdirs(); FileOutputStream fos = null; ObjectOutputStream oos = null; boolean keep = true; try { fos = new FileOutputStream(file); oos = new ObjectOutputStream(fos); JSONObject json = new JSONObject(); json.put("url", metaData.getUrl()); json.put("imageurl", metaData.getImageurl()); json.put("title", metaData.getTitle()); json.put("description", metaData.getDescription()); json.put("sitename", metaData.getSitename()); json.put("mediatype", metaData.getMediatype()); json.put("favicon", metaData.getFavicon()); oos.writeObject(json.toString()); } catch (Exception e) { e.printStackTrace(); keep = false; } finally { try { if (oos != null) oos.close(); if (fos != null) fos.close(); if (!keep) file.delete(); } catch (Exception e) { e.printStackTrace(); } } } private void retrieveMeta(String url, Context context) { Document doc = null; try { doc = Jsoup.connect(url) .timeout(Config.CONNECT_TIMEOUT * 1000) .get(); } catch (Exception e) { e.printStackTrace(); } Elements elements = null; if (doc != null) { elements = doc.getElementsByTag("meta"); // getTitle doc.select("meta[property=og:title]") String title = doc.select("meta[property=og:title]").attr("content"); if (title == null || title.isEmpty()) { title = doc.title(); } metaData.setTitle(title); //getDescription String description = doc.select("meta[name=description]").attr("content"); if (description == null || description.isEmpty()) { description = doc.select("meta[name=Description]").attr("content"); } if (description == null || description.isEmpty()) { description = doc.select("meta[property=og:description]").attr("content"); } if (description == null || description.isEmpty()) { description = ""; } metaData.setDescription(description); // getMediaType Elements mediaTypes = doc.select("meta[name=medium]"); String type = ""; if (mediaTypes.size() > 0) { String media = mediaTypes.attr("content"); type = media.equals("image") ? "photo" : media; } else { type = doc.select("meta[property=og:type]").attr("content"); } metaData.setMediatype(type); //getImages Elements imageElements = doc.select("meta[property=og:image]"); if (imageElements.size() > 0) { String image = imageElements.attr("content"); if (!image.isEmpty()) { metaData.setImageurl(resolveURL(url, image)); } } if (metaData.getImageurl() != null && metaData.getImageurl().isEmpty()) { String src = doc.select("link[rel=image_src]").attr("href"); if (!src.isEmpty()) { metaData.setImageurl(resolveURL(url, src)); } else { src = doc.select("link[rel=apple-touch-icon]").attr("href"); if (!src.isEmpty()) { metaData.setImageurl(resolveURL(url, src)); metaData.setFavicon(resolveURL(url, src)); } else { src = doc.select("link[rel=icon]").attr("href"); if (!src.isEmpty()) { metaData.setImageurl(resolveURL(url, src)); metaData.setFavicon(resolveURL(url, src)); } } } } //Favicon String src = doc.select("link[rel=apple-touch-icon]").attr("href"); if (!src.isEmpty()) { metaData.setFavicon(resolveURL(url, src)); } else { src = doc.select("link[rel=icon]").attr("href"); if (!src.isEmpty()) { metaData.setFavicon(resolveURL(url, src)); } } } if (elements != null) { for (Element element : elements) { if (element.hasAttr("property")) { String str_property = element.attr("property").trim(); if (str_property.equals("og:url")) { metaData.setUrl(element.attr("content")); } if (str_property.equals("og:site_name")) { metaData.setSitename(element.attr("content")); } } } } if (metaData.getUrl().equals("") || metaData.getUrl().isEmpty()) { URI uri = null; try { uri = new URI(url); } catch (URISyntaxException e) { e.printStackTrace(); } if (url == null) { metaData.setUrl(url); } else { metaData.setUrl(uri != null ? uri.getHost() : null); } } saveMeta(metaData, context); } public interface ResponseListener { void onData(MetaData metaData); void onError(Exception e); } public interface RichLinkListener { void onClicked(View view, MetaData meta); } public interface ViewListener { void onSuccess(boolean status); void onError(Exception e); } // Pattern for recognizing a URL, based off RFC 3986 public static final Pattern urlPattern = Pattern.compile( "(?:^|[\\W])((ht|f)tp(s?):\\/\\/|www\\.)" + "(([\\w\\-]+\\.){1,}?([\\w\\-.~]+\\/?)*" + "[\\p{Alnum}.,%_=?&#\\-+()\\[\\]\\*$~@!:/{};']*)", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL); }