Java tutorial
/* * This file is part of Transdroid Torrent Search * <http://code.google.com/p/transdroid-search/> * * Transdroid Torrent Search is free software: you can redistribute * it and/or modify it under the terms of the GNU Lesser General * Public License as published by the Free Software Foundation, * either version 3 of the License, or (at your option) any later * version. * * Transdroid Torrent Search is distributed in the hope that it will * be useful, but WITHOUT ANY WARRANTY; without even the implied * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Transdroid. If not, see <http://www.gnu.org/licenses/>. */ package org.transdroid.search.BitHdtv; import android.content.Context; import org.apache.http.HttpResponse; import org.apache.http.HttpStatus; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.message.BasicNameValuePair; import org.transdroid.search.ISearchAdapter; import org.transdroid.search.SearchResult; import org.transdroid.search.SortOrder; import org.transdroid.search.TorrentSite; import org.transdroid.search.gui.SettingsHelper; import org.transdroid.util.HttpHelper; import java.io.InputStream; import java.net.URLEncoder; import java.security.InvalidParameterException; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Arrays; import java.util.Date; import java.util.List; import java.util.Locale; import javax.security.auth.login.LoginException; /** * An adapter that provides access to BitHDTV searches by parsing the raw HTML output. */ public class BitHdtvAdapter implements ISearchAdapter { private static final String LOGIN_USER = "username"; private static final String LOGIN_PASS = "password"; private static final String LOGINURL = "https://www.bit-hdtv.com/takelogin.php"; private static final String QUERYURL = "https://www.bit-hdtv.com/torrents.php?search=%1$s&cat=0%2$s"; private static final String SORT_COMPOSITE = ""; private static final String SORT_SEEDS = "&sort=7&type=desc"; private final SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.US); private HttpClient prepareRequest(Context context) throws Exception { String username = SettingsHelper.getSiteUser(context, TorrentSite.BitHdtv); String password = SettingsHelper.getSitePass(context, TorrentSite.BitHdtv); if (username == null || password == null) { throw new InvalidParameterException( "No username or password was provided, while this is required for this private site."); } // First log in HttpClient httpclient = HttpHelper.buildDefaultSearchHttpClient(false); HttpPost loginPost = new HttpPost(LOGINURL); loginPost.setEntity(new UrlEncodedFormEntity(Arrays.asList(new BasicNameValuePair(LOGIN_USER, username), new BasicNameValuePair(LOGIN_PASS, password)))); HttpResponse loginResult = httpclient.execute(loginPost); if (loginResult.getStatusLine().getStatusCode() != HttpStatus.SC_OK) { // Failed to sign in throw new LoginException("Login failure for BitHdTv with user " + username); } String loginHtml = HttpHelper.convertStreamToString(loginResult.getEntity().getContent()); final String LOGIN_ERROR = "Login failed!"; if (loginHtml == null || loginHtml.contains(LOGIN_ERROR)) { // Failed to sign in throw new LoginException("Login failure for BitHdTv with user " + username); } return httpclient; } @Override public List<SearchResult> search(Context context, String query, SortOrder order, int maxResults) throws Exception { HttpClient httpclient = prepareRequest(context); final String url = String.format(QUERYURL, URLEncoder.encode(query, "UTF-8"), (order == SortOrder.BySeeders ? SORT_SEEDS : SORT_COMPOSITE)); // Start synchronous search // Make request HttpGet httpget = new HttpGet(url); HttpResponse response = httpclient.execute(httpget); // Read HTML response InputStream instream = response.getEntity().getContent(); String html = HttpHelper.convertStreamToString(instream); instream.close(); return parseHtml(html, maxResults); } @Override public InputStream getTorrentFile(Context context, String url) throws Exception { // Provide an authenticated file handle to the requested url HttpClient httpclient = prepareRequest(context); HttpResponse response = httpclient.execute(new HttpGet(url)); return response.getEntity().getContent(); } protected List<SearchResult> parseHtml(String html, int maxResults) throws Exception { // Texts to find subsequently final String NOMATCH = "No match!"; final String RESULTS = "<!-- uj rendezes kezdodik -->"; final String TORRENT = "<td class=detail align=center><p><a href='"; // Parse the search results from HTML by looking for the identifying texts List<SearchResult> results = new ArrayList<>(); if (html.contains(NOMATCH)) { return results; // Success, but no result for this query } int resultsStart = html.indexOf(RESULTS) + RESULTS.length(); int torStart = html.indexOf(TORRENT, resultsStart); while (torStart >= 0 && results.size() < maxResults) { int nextTorrentIndex = html.indexOf(TORRENT, torStart + TORRENT.length()); if (nextTorrentIndex >= 0) { results.add(parseHtmlItem(html.substring(torStart + TORRENT.length(), nextTorrentIndex))); } else { results.add(parseHtmlItem(html.substring(torStart + TORRENT.length()))); } torStart = nextTorrentIndex; } return results; } private SearchResult parseHtmlItem(String htmlItem) { // Texts to find subsequently final String LINK_END = "'><img src='/pic/dwnld.gif'"; final String NAME = "<a title=\""; final String NAME_END = "\" href=\""; final String DETAILS = "\" href=\""; final String DETAILS_END = "\">"; final String DATE = "<td class=detail align=center>"; final String DATE_END = "</td>"; final String SIZE = "<td class=detail align=center>"; final String SIZE_END = "</td>"; final String SEEDERS = "#seeders\">"; final String SEEDERS_END = "</a>"; final String LEECHERS = "#leechers\">"; final String LEECHERS_END = "</a>"; final String PREFIX = "http://www.bit-hdtv.com/"; // Link starts right at the beginning of an item String link = PREFIX + htmlItem.substring(0, htmlItem.indexOf(LINK_END)); int nameStart = htmlItem.indexOf(NAME, 0) + NAME.length(); String name = htmlItem.substring(nameStart, htmlItem.indexOf(NAME_END, nameStart)); int detailsStart = htmlItem.indexOf(DETAILS, nameStart) + DETAILS.length(); String details = htmlItem.substring(detailsStart, htmlItem.indexOf(DETAILS_END, detailsStart)); int dateStart = htmlItem.indexOf(DATE, detailsStart) + DATE.length(); String dateText = htmlItem.substring(dateStart, htmlItem.indexOf(DATE_END, dateStart)); Date date = null; try { date = df.parse(dateText); } catch (ParseException e) { // Not parsable; just leave it at null } int sizeStart = htmlItem.indexOf(SIZE, dateStart) + SIZE.length(); String size = htmlItem.substring(sizeStart, htmlItem.indexOf(SIZE_END, sizeStart)); size = size.replace("<br>", ""); int seedersStart = htmlItem.indexOf(SEEDERS, dateStart); int seeders = 0; if (seedersStart >= 0) { seedersStart += SEEDERS.length(); String seedersText = htmlItem.substring(seedersStart, htmlItem.indexOf(SEEDERS_END, seedersStart)); seeders = Integer.parseInt(seedersText); } int leechersStart = htmlItem.indexOf(LEECHERS, dateStart); int leechers = 0; if (leechersStart >= 0) { leechersStart += LEECHERS.length(); String leechersText = htmlItem.substring(leechersStart, htmlItem.indexOf(LEECHERS_END, leechersStart)); leechers = Integer.parseInt(leechersText); } return new SearchResult(name, link, details, size, date, seeders, leechers); } @Override public String buildRssFeedUrlFromSearch(String query, SortOrder order) { // BIT-HDTV doesn't support RSS feed-based searches return null; } @Override public String getSiteName() { return "BIT-HDTV"; } @Override public boolean isPrivateSite() { return true; } @Override public boolean usesToken() { return false; } }