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/*
* Juick
* Copyright (C) 2008-2013, Ugnich Anton
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.juick.www;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.juick.server.UserQueries;
import com.juick.www.facebook.Graph;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.math.NumberUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.dao.EmptyResultDataAccessException;
import org.springframework.jdbc.core.JdbcTemplate;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.UUID;
/**
*
* @author Ugnich Anton
*/
public class FacebookLogin {
private static final Logger logger = LoggerFactory.getLogger(FacebookLogin.class);
private final String FACEBOOK_APPID;
private final String FACEBOOK_SECRET;
private final String FACEBOOK_REDIRECT = "http://juick.com/_fblogin";
private final ObjectMapper mapper;
public FacebookLogin(String ApplicationID, String secret) {
this.FACEBOOK_APPID = ApplicationID;
this.FACEBOOK_SECRET = secret;
mapper = new ObjectMapper();
}
protected void doGet(JdbcTemplate sql, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String fbstate;
String code = request.getParameter("code");
if (code == null || code.equals("")) {
fbstate = UUID.randomUUID().toString();
Cookie c = new Cookie("fbstate", fbstate);
response.addCookie(c);
response.setStatus(HttpServletResponse.SC_MOVED_TEMPORARILY);
response.setHeader("Location", "https://www.facebook.com/dialog/oauth?scope=publish_stream&client_id=" + FACEBOOK_APPID + "&redirect_uri=" + URLEncoder.encode(FACEBOOK_REDIRECT, "utf-8") + "&state=" + fbstate);
return;
}
fbstate = Utils.getCookie(request, "fbstate");
if (fbstate == null || fbstate.isEmpty() || !fbstate.equals(request.getParameter("state"))) {
response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
return;
} else {
Cookie c = new Cookie("fbstate", "-");
c.setMaxAge(0);
response.addCookie(c);
}
String token = Utils.fetchURL("https://graph.facebook.com/oauth/access_token?client_id=" + FACEBOOK_APPID + "&redirect_uri=" + URLEncoder.encode(FACEBOOK_REDIRECT, "utf-8") + "&client_secret=" + FACEBOOK_SECRET + "&code=" + URLEncoder.encode(code, "utf-8"));
if (token == null || token.isEmpty() || !token.startsWith("access_token=")) {
logger.error("FACEBOOK TOKEN ERROR: " + token);
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
}
token = token.substring(13); // access_token=...
int tokenamp = token.indexOf('&'); // &expires=
if (tokenamp > 0) {
token = token.substring(0, tokenamp);
}
String graph = Utils.fetchURL("https://graph.facebook.com/me?access_token=" + token);
if (graph == null || graph.isEmpty()) {
logger.error("FACEBOOK GRAPH ERROR");
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
}
try {
Graph fb = mapper.readValue(graph, Graph.class);
long fbID = NumberUtils.toLong(fb.getId(), 0);
if (fbID == 0 || StringUtils.isBlank(fb.getName()) || StringUtils.isBlank(fb.getLink())) {
throw new Exception();
}
int uid = getUIDbyFBID(sql, fbID);
if (uid > 0) {
if (!updateDB(sql, fbID, token, fb.getName(), fb.getLink())) {
throw new Exception();
}
Cookie c = new Cookie("hash", UserQueries.getHashByUID(sql, uid));
c.setMaxAge(50 * 24 * 60 * 60);
response.addCookie(c);
response.setStatus(HttpServletResponse.SC_MOVED_TEMPORARILY);
response.setHeader("Location", "/");
} else if (fb.getVerified()) {
String loginhash = UUID.randomUUID().toString();
if (!insertDB(sql, fbID, loginhash, token, fb.getName(), fb.getLink())) {
throw new Exception();
}
response.setStatus(HttpServletResponse.SC_MOVED_TEMPORARILY);
response.setHeader("Location", "/signup?type=fb&hash=" + loginhash);
} else {
throw new Exception();
}
} catch (Exception e) {
logger.error("fb error", e);
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
}
}
private int getUIDbyFBID(JdbcTemplate sql, long fbID) {
try {
return sql.queryForObject("SELECT user_id FROM facebook WHERE fb_id=? AND user_id IS NOT NULL",
Integer.class, fbID);
} catch (EmptyResultDataAccessException e) {
return 0;
}
}
private boolean insertDB(JdbcTemplate sql, long fbID, String loginhash, String token, String fbName, String fbLink) {
return sql.update("INSERT INTO facebook(fb_id,loginhash,access_token,fb_name,fb_link) VALUES (?,?,?,?,?)",
fbID, loginhash, token, fbName, fbLink) > 0;
}
private boolean updateDB(JdbcTemplate sql, long fbID, String token, String fbName, String fbLink) {
return sql.update("UPDATE facebook SET access_token=?,fb_name=?,fb_link=? WHERE fb_id=?",
token, fbName, fbLink, fbID) > 0;
}
}
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