Java tutorial
/* * DeliciousDroid - http://code.google.com/p/DeliciousDroid/ * * Copyright (C) 2010 Matt Schmidt * * DeliciousDroid is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 3 of the License, * or (at your option) any later version. * * DeliciousDroid 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 * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with DeliciousDroid; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA */ package com.deliciousdroid.client; import android.util.Log; import com.deliciousdroid.Constants; import com.deliciousdroid.client.HttpClientFactory; import com.deliciousdroid.providers.ArticleContent.Article; import org.apache.http.auth.Credentials; import org.apache.http.auth.UsernamePasswordCredentials; import org.apache.http.client.CredentialsProvider; import org.apache.http.auth.AuthScope; import android.net.Uri; import org.apache.http.HttpResponse; import org.apache.http.HttpStatus; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.protocol.HTTP; import org.apache.http.util.EntityUtils; import org.json.JSONObject; import java.io.IOException; import java.net.URLEncoder; /** * Provides utility methods for communicating with the server. */ public class NetworkUtilities { private static final String TAG = "NetworkUtilities"; public static final String PARAM_USERNAME = "username"; public static final String PARAM_PASSWORD = "password"; public static final String PARAM_UPDATED = "timestamp"; public static final String USER_AGENT = "AuthenticationService/1.0"; public static final String FETCH_FRIEND_UPDATES_URI = "http://feeds.delicious.com/v2/json/networkmembers/"; public static final String FETCH_FRIEND_BOOKMARKS_URI = "http://feeds.delicious.com/v2/json/"; public static final String FETCH_NETWORK_RECENT_BOOKMARKS_URI = "http://feeds.delicious.com/v2/json/network/"; public static final String FETCH_STATUS_URI = "http://feeds.delicious.com/v2/json/network/"; public static final String FETCH_TAGS_URI = "http://feeds.delicious.com/v2/json/tags/"; private static final String SCHEME = "http"; private static final String SCHEME_HTTP = "http"; private static final String DELICIOUS_AUTHORITY = "api.del.icio.us"; private static final int PORT = 80; private static final int PORT_HTTP = 80; private static final AuthScope SCOPE = new AuthScope(DELICIOUS_AUTHORITY, PORT); private static final AuthScope SCOPE_HTTP = new AuthScope(DELICIOUS_AUTHORITY, PORT_HTTP); /** * Attempts to authenticate to Pinboard using a legacy Pinboard account. * * @param username The user's username. * @param password The user's password. * @param handler The hander instance from the calling UI thread. * @param context The context of the calling Activity. * @return The boolean result indicating whether the user was * successfully authenticated. */ public static boolean pinboardAuthenticate(String username, String password) { final HttpResponse resp; Uri.Builder builder = new Uri.Builder(); builder.scheme(SCHEME); builder.authority(DELICIOUS_AUTHORITY); builder.appendEncodedPath("v1/posts/update"); Uri uri = builder.build(); HttpGet request = new HttpGet(String.valueOf(uri)); DefaultHttpClient client = (DefaultHttpClient) HttpClientFactory.getThreadSafeClient(); CredentialsProvider provider = client.getCredentialsProvider(); Credentials credentials = new UsernamePasswordCredentials(username, password); provider.setCredentials(SCOPE, credentials); try { resp = client.execute(request); if (resp.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { if (Log.isLoggable(TAG, Log.VERBOSE)) { Log.v(TAG, "Successful authentication"); } return true; } else { if (Log.isLoggable(TAG, Log.VERBOSE)) { Log.v(TAG, "Error authenticating" + resp.getStatusLine()); } return false; } } catch (final IOException e) { if (Log.isLoggable(TAG, Log.VERBOSE)) { Log.v(TAG, "IOException when getting authtoken", e); } return false; } finally { if (Log.isLoggable(TAG, Log.VERBOSE)) { Log.v(TAG, "getAuthtoken completing"); } } } /** * Gets the title of a web page. * * @param url The URL of the web page. * @return A String containing the title of the web page. */ public static String getWebpageTitle(String url) { if (url != null && !url.equals("")) { if (!url.startsWith("http")) { url = "http://" + url; } HttpResponse resp = null; HttpGet post = null; try { post = new HttpGet(url.replace("|", "%7C")); post.setHeader("User-Agent", "Mozilla/5.0"); resp = HttpClientFactory.getThreadSafeClient().execute(post); if (resp.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { String response = EntityUtils.toString(resp.getEntity(), HTTP.UTF_8); int start = response.indexOf("<title>") + 7; int end = response.indexOf("</title>", start + 1); String title = response.substring(start, end); return title; } else return ""; } catch (Exception e) { return ""; } } else return ""; } /** * Gets the title of a web page. * * @param url The URL of the web page. * @return A String containing the title of the web page. */ public static Article getArticleText(String url) { if (url != null && !url.equals("")) { if (!url.startsWith("http")) { url = "http://" + url; } HttpResponse resp = null; HttpGet post = null; try { post = new HttpGet(Constants.TEXT_EXTRACTOR_URL + URLEncoder.encode(url, "UTF-8") + "&format=json"); post.setHeader("User-Agent", "Mozilla/5.0"); resp = HttpClientFactory.getThreadSafeClient().execute(post); final int statusCode = resp.getStatusLine().getStatusCode(); if (statusCode == HttpStatus.SC_OK) { final String response = EntityUtils.toString(resp.getEntity()); final JSONObject article = new JSONObject(response); return Article.valueOf(article); } } catch (Exception e) { return null; } } return null; } }