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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.JSONException;
import org.json.JSONObject;
/**
*
* @author Ugnich Anton
*/
public class VKontakteLogin {
private static final String VK_APPID = "3544101";
private static final String VK_SECRET = "z2afNI8jA5lIpZ2jsTm1";
private static final String VK_REDIRECT = "http://juick.com/_vklogin";
protected void doGet(Connection sql, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String code = request.getParameter("code");
if (code == null || code.equals("")) {
response.setStatus(HttpServletResponse.SC_MOVED_TEMPORARILY);
response.setHeader("Location", "https://oauth.vk.com/authorize?client_id=" + VK_APPID + "&redirect_uri=" + URLEncoder.encode(VK_REDIRECT, "utf-8") + "&scope=friends,wall,offline&response_type=code");
return;
}
String tokenjson = Utils.fetchURL("https://oauth.vk.com/access_token?client_id=" + VK_APPID + "&redirect_uri=" + URLEncoder.encode(VK_REDIRECT, "utf-8") + "&client_secret=" + VK_SECRET + "&code=" + URLEncoder.encode(code, "utf-8"));
if (tokenjson == null || tokenjson.isEmpty()) {
System.err.println("VK TOKEN EMPTY");
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
}
String token = null;
long vkID = 0;
try {
JSONObject json = new JSONObject(tokenjson);
token = json.getString("access_token");
vkID = json.getLong("user_id");
} catch (JSONException e) {
System.err.println("VK TOKEN EXCEPTION: " + e);
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
}
if (token == null || vkID == 0) {
System.err.println("VK TOKEN EMPTY: " + tokenjson);
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
}
String graph = Utils.fetchURL("https://api.vk.com/method/users.get?uids=" + vkID + "&fields=screen_name&access_token=" + token);
if (graph == null || graph.isEmpty()) {
System.err.println("VK GRAPH ERROR");
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
}
try {
JSONObject json = new JSONObject(graph).getJSONArray("response").getJSONObject(0);
String vkName = json.getString("first_name") + " " + json.getString("last_name");
String vkLink = json.getString("screen_name");
if (vkName == null || vkLink == null || vkName.isEmpty() || vkName.length() == 1 || vkLink.isEmpty()) {
throw new Exception();
}
int uid = getUIDbyVKID(sql, vkID);
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, vkID, loginhash, token, vkName, vkLink)) {
throw new Exception();
}
response.setStatus(HttpServletResponse.SC_MOVED_TEMPORARILY);
response.setHeader("Location", "/signup?type=vk&hash=" + loginhash);
}
} catch (Exception e) {
System.err.println("JSON ERROR: " + e);
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
}
}
private int getUIDbyVKID(Connection sql, long vkID) {
int uid = 0;
PreparedStatement stmt = null;
ResultSet rs = null;
try {
stmt = sql.prepareStatement("SELECT user_id FROM vk WHERE vk_id=? AND user_id IS NOT NULL");
stmt.setLong(1, vkID);
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 vkID, String loginhash, String token, String vkName, String vkLink) {
boolean ret = false;
PreparedStatement stmt = null;
try {
stmt = sql.prepareStatement("INSERT INTO vk(vk_id,loginhash,access_token,vk_name,vk_link) VALUES (?,?,?,?,?)");
stmt.setLong(1, vkID);
stmt.setString(2, loginhash);
stmt.setString(3, token);
stmt.setString(4, vkName);
stmt.setString(5, vkLink);
stmt.executeUpdate();
ret = true;
} catch (SQLException e) {
System.err.println(e);
} finally {
Utils.finishSQL(null, stmt);
}
return ret;
}
}
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