From cdd48f30c7fca97327de48ff6b1cd9edf1629a5d Mon Sep 17 00:00:00 2001 From: Ugnich Anton Date: Fri, 29 Mar 2013 16:29:02 +0700 Subject: Facebook signup --- src/java/com/juick/http/www/FacebookLogin.java | 162 +++++++++++++++++++++++++ 1 file changed, 162 insertions(+) create mode 100644 src/java/com/juick/http/www/FacebookLogin.java (limited to 'src/java/com/juick/http/www/FacebookLogin.java') diff --git a/src/java/com/juick/http/www/FacebookLogin.java b/src/java/com/juick/http/www/FacebookLogin.java new file mode 100644 index 00000000..8933075b --- /dev/null +++ b/src/java/com/juick/http/www/FacebookLogin.java @@ -0,0 +1,162 @@ +/* + * 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 . + */ +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; + } +} -- cgit v1.2.3