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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.http.www;
import com.juick.server.UserQueries;
import java.io.IOException;
import java.net.URLEncoder;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.UUID;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.json.JSONObject;
/**
*
* @author Ugnich Anton
*/
public class FacebookLogin {
private static final String FACEBOOK_APPID = "130568668304";
private static final String FACEBOOK_SECRET = "95813bfb6ab8f473410c50d4f971649e";
private static final String FACEBOOK_REDIRECT = "http://juick.com/_fblogin";
protected void doGet(Connection 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?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=")) {
System.err.println("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()) {
System.err.println("FACEBOOK GRAPH ERROR");
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
}
try {
JSONObject json = new JSONObject(graph);
String fbIDStr = json.getString("id");
String fbName = json.getString("name");
String fbLink = json.getString("link");
long fbID = 0;
if (fbIDStr != null && !fbIDStr.isEmpty()) {
fbID = Long.parseLong(fbIDStr);
}
if (fbID == 0 || fbName == null || fbLink == null || fbName.isEmpty() || fbLink.isEmpty()) {
throw new Exception();
}
int uid = getUIDbyFBID(sql, fbID);
if (uid > 0) {
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 {
String loginhash = UUID.randomUUID().toString();
if (!insertDB(sql, fbID, loginhash, token, fbName, fbLink)) {
throw new Exception();
}
response.setStatus(HttpServletResponse.SC_MOVED_TEMPORARILY);
response.setHeader("Location", "/signup?type=fb&hash=" + loginhash);
}
} catch (Exception e) {
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
}
}
private int getUIDbyFBID(Connection sql, long fbID) {
int uid = 0;
PreparedStatement stmt = null;
ResultSet rs = null;
try {
stmt = sql.prepareStatement("SELECT user_id FROM facebook WHERE fb_id=? AND user_id IS NOT NULL");
stmt.setLong(1, fbID);
rs = stmt.executeQuery();
if (rs.first()) {
uid = rs.getInt(1);
}
} catch (SQLException e) {
System.err.println(e);
} finally {
Utils.finishSQL(rs, stmt);
}
return uid;
}
private boolean insertDB(Connection sql, long fbID, String loginhash, String token, String fbName, String fbLink) {
boolean ret = false;
PreparedStatement stmt = null;
try {
stmt = sql.prepareStatement("INSERT INTO facebook(fb_id,loginhash,access_token,fb_name,fb_link) VALUES (?,?,?,?,?)");
stmt.setLong(1, fbID);
stmt.setString(2, loginhash);
stmt.setString(3, token);
stmt.setString(4, fbName);
stmt.setString(5, fbLink);
stmt.executeUpdate();
ret = true;
} catch (SQLException e) {
System.err.println(e);
} finally {
Utils.finishSQL(null, stmt);
}
return ret;
}
}
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