Java tutorial
/* * This file is part of Flicklib. * * Copyright (C) Francis De Brabandere * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.flicklib.service.movie.netflix; import java.io.IOException; import java.net.URISyntaxException; import java.net.URL; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import net.oauth.OAuthAccessor; import net.oauth.OAuthConsumer; import net.oauth.OAuthException; import net.oauth.OAuthMessage; import net.oauth.OAuthServiceProvider; import net.oauth.client.HttpClientPool; import net.oauth.client.OAuthClient; import net.oauth.client.OAuthHttpClient; import org.apache.commons.httpclient.HttpClient; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.xml.sax.Attributes; import org.xml.sax.InputSource; import org.xml.sax.SAXException; import org.xml.sax.XMLReader; import org.xml.sax.helpers.DefaultHandler; import org.xml.sax.helpers.XMLReaderFactory; import com.flicklib.api.AbstractMovieInfoFetcher; import com.flicklib.domain.MoviePage; import com.flicklib.domain.MovieSearchResult; import com.flicklib.domain.MovieService; import com.google.inject.Inject; import com.google.inject.Singleton; import com.google.inject.name.Named; /** * @author francisdb * */ @Singleton public class NetflixInfoFetcher extends AbstractMovieInfoFetcher { private static final Logger LOGGER = LoggerFactory.getLogger(NetflixInfoFetcher.class); /** * http://www.netflix.com */ final static MovieService NETFLIX = new MovieService("NETFLIX", "Netflix", "http://www.netflix.com"); private final OAuthAccessor accessor; @Inject public NetflixInfoFetcher(@Named("netflix.key") final String apikey, @Named("netflix.secret") final String sharedsecret) { OAuthServiceProvider provider = new OAuthServiceProvider("http://api.netflix.com/oauth/request_token", "https://api-user.netflix.com/oauth/login", "http://api.netflix.com/oauth/access_token"); OAuthConsumer consumer = new OAuthConsumer(null, apikey, sharedsecret, provider); accessor = new OAuthAccessor(consumer); } @Override public MoviePage getMovieInfo(String id) throws IOException { throw new RuntimeException("Not implemented"); } @Override public List<? extends MovieSearchResult> search(String title) throws IOException { List<? extends MovieSearchResult> result = null; OAuthClient oAuthClient = new OAuthHttpClient(new NotPoolingHttpClientPool()); Map<String, String> params = new HashMap<String, String>(); params.put("term", title); params.put("max_results", String.valueOf(20)); try { OAuthMessage message = oAuthClient.invoke(accessor, "GET", "http://api.netflix.com/catalog/titles", params.entrySet()); // LOGGER.info(message.getBodyAsString()); SaxResultUnmarshaller saxUms = new SaxResultUnmarshaller(); XMLReader rdr = XMLReaderFactory.createXMLReader(); rdr.setContentHandler(saxUms); rdr.parse(new InputSource(message.getBodyAsStream())); result = saxUms.getResult(); } catch (OAuthException e) { throw new IOException("Problem while requesting data from netflix", e); } catch (URISyntaxException e) { throw new IOException("Problem while requesting data from netflix", e); } catch (SAXException e) { throw new IOException("Problem while requesting data from netflix", e); } return result; } /** * TODO Should be removed when switching to new OAuth version (is * implemented overthere) * * @author francisdb * */ private static final class NotPoolingHttpClientPool implements HttpClientPool { @Override public HttpClient getHttpClient(URL server) { return new HttpClient(); } } /** * Parses a single netflix xml result * * @author francisdb * */ private static class SaxResultUnmarshaller extends DefaultHandler { /** * Rating in % */ private MoviePage moviePage; private String tagToReadContentFrom; private final List<MoviePage> result; public SaxResultUnmarshaller() { result = new ArrayList<MoviePage>(); moviePage = new MoviePage(NETFLIX); } public List<MoviePage> getResult() { return result; } @Override public void startElement(String uri, String localName, String name, Attributes attributes) throws SAXException { LOGGER.debug("element <" + name + " " + toString(attributes) + ">"); if ("catalog_title".equals(name)) { moviePage = new MoviePage(NETFLIX); } if ("id".equals(name)) { tagToReadContentFrom = name; } else if ("link".equals(name)) { String rel = attributes.getValue("rel"); if ("alternate".equals(rel)) { moviePage.setUrl(attributes.getValue("href")); } } else if ("average_rating".equals(name)) { tagToReadContentFrom = name; } else if ("box_art".equals(name)) { moviePage.setImgUrl(attributes.getValue("large")); } else if ("release_year".equals(name)) { tagToReadContentFrom = name; } else if ("title".equals(name)) { moviePage.setTitle(attributes.getValue("regular")); } else if ("category".equals(name)) { String scheme = attributes.getValue("scheme"); if ("http://api.netflix.com/categories/genres".equals(scheme)) { moviePage.addGenre(attributes.getValue("label")); } } } @Override public void characters(char[] ch, int start, int length) throws SAXException { if (tagToReadContentFrom != null) { String txt = new String(ch, start, length); if ("average_rating".equals(tagToReadContentFrom)) { moviePage.setScore((int) (Double.valueOf(txt) * 20)); } else if ("id".equals(tagToReadContentFrom)) { moviePage.setIdForSite(txt); } else if ("release_year".equals(tagToReadContentFrom)) { moviePage.setYear(Integer.parseInt(txt)); } } } @Override public void endElement(String uri, String localName, String name) throws SAXException { if ("catalog_title".equals(name)) { result.add(moviePage); moviePage = null; } tagToReadContentFrom = null; } String toString(Attributes attributes) { StringBuilder s = new StringBuilder(); for (int i = 0; i < attributes.getLength(); i++) { s.append(attributes.getLocalName(i)).append("='").append(attributes.getValue(i)).append("' "); } return s.toString(); } } @Override public MovieService getService() { return NETFLIX; } }