Facebook signup

7 files changed, 590 insertions, 13 deletions

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 <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;
+    }
+}
diff --git a/src/java/com/juick/http/www/Login.java b/src/java/com/juick/http/www/Login.java
index ba8fac7e..79f626d0 100644
--- a/src/java/com/juick/http/www/Login.java
+++ b/src/java/com/juick/http/www/Login.java
@@ -49,6 +49,13 @@ public class Login {
             out.println("<div id=\"topwrapper\">");
             out.println("<div id=\"wrapper\">");
             out.println("<div id=\"content\">");
+            out.println("<h1 class=\"signup-h1\"><img src=\"//static.juick.com/settings/facebook.png\" alt=\"Facebook\"/>" + rb.getString("Login Facebook") + "</h1>");
+            out.println("<p><a href=\"/_fblogin\" rel=\"nofollow\"><img src=\"//static.juick.com/facebook-connect.png\" alt=\"Connect with Facebook\"/></a></p>");
+            out.println("<hr class=\"signup-hr\"/>");
+            out.println("<h1 class=\"signup-h1\"><img src=\"//static.juick.com/settings/xmpp.png\" alt=\"XMPP\"/>" + rb.getString("Login XMPP") + "</h1>");
+            out.println("<p>" + rb.getString("XMPP instructions") + "</p>");
+            out.println("<hr class=\"signup-hr\"/>");
+            out.println("<h1 class=\"signup-h1\">" + rb.getString("Have Juick") + "</h1>");
             out.println("<form action=\"/login\" method=\"post\">");
             out.println("<p>" + rb.getString("Username") + ": <input type=\"text\" name=\"username\"/></p>");
             out.println("<p>" + rb.getString("Password") + ": <input type=\"password\" name=\"password\"/></p>");
diff --git a/src/java/com/juick/http/www/Main.java b/src/java/com/juick/http/www/Main.java
index a41ccf9b..baaa1cae 100644
--- a/src/java/com/juick/http/www/Main.java
+++ b/src/java/com/juick/http/www/Main.java
@@ -37,7 +37,7 @@ import ru.sape.Sape;
  */
 @WebServlet(name = "Main", urlPatterns = {"/"})
 public class Main extends HttpServlet implements XmppListener {
-
+    
     Connection sql;
     Connection sqlSearch;
     XmppConnection xmpp;
@@ -47,14 +47,17 @@ public class Main extends HttpServlet implements XmppListener {
     User pagesUser = new User();
     UserThread pagesUserThread = new UserThread();
     NewMessage pagesNewMessage = new NewMessage();
-
+    FacebookLogin loginFacebook = new FacebookLogin();
+    SignUp signup = new SignUp();
+    Settings settings = new Settings();
+    
     @Override
     public void init() throws ServletException {
         super.init();
         try {
             Properties conf = new Properties();
             conf.load(new FileInputStream("/etc/juick/www.conf"));
-
+            
             Class.forName("com.mysql.jdbc.Driver");
             sql = DriverManager.getConnection("jdbc:mysql://localhost/juick?autoReconnect=true&user=" + conf.getProperty("mysql_username", "") + "&password=" + conf.getProperty("mysql_password", ""));
             sqlSearch = DriverManager.getConnection("jdbc:mysql://127.0.0.1:9306/juick?autoReconnect=true&characterEncoding=utf8&maxAllowedPacket=512000&relaxAutoCommit=true&user=root&password=");
@@ -63,15 +66,15 @@ public class Main extends HttpServlet implements XmppListener {
             xmpp.addListener((XmppListener) this);
             xmpp.start();
              */
-
+            
             blogs = new Blogs(sql);
-
+            
             PageTemplates.sape = new Sape(conf.getProperty("sape_user"), "juick.com", 2000, 3600);
         } catch (Exception e) {
             log(null, e);
         }
     }
-
+    
     @Override
     public void destroy() {
         super.destroy();
@@ -92,17 +95,17 @@ public class Main extends HttpServlet implements XmppListener {
             }
         }
     }
-
+    
     @Override
     public void onAuth(String resource) {
         log("XMPP AUTH: " + resource);
     }
-
+    
     @Override
     public void onAuthFailed(String message) {
         log("XMPP AUTH FAILED: " + message);
     }
-
+    
     @Override
     public void onConnectionFailed(String message) {
         log("XMPP CONNECTION FAILED: " + message);
@@ -121,7 +124,7 @@ public class Main extends HttpServlet implements XmppListener {
             request.setCharacterEncoding("UTF-8");
         }
         String uri = request.getRequestURI();
-
+        
         if (uri.equals("/")) {
             blogs.doGet(sql, sqlSearch, request, response);
         } else if (uri.equals("/post")) {
@@ -140,7 +143,11 @@ public class Main extends HttpServlet implements XmppListener {
         } else if (uri.equals("/logout")) {
             login.doGetLogout(sql, request, response);
         } else if (uri.equals("/settings")) {
-            //TODO settings
+            settings.doGet(sql, request, response);
+        } else if (uri.equals("/_fblogin")) {
+            loginFacebook.doGet(sql, request, response);
+        } else if (uri.equals("/signup")) {
+            signup.doGet(sql, request, response);
         } else if (uri.equals("/help") || uri.equals("/help/")) {
             help.doRedirectToHelpIndex(sql, request, response);
         } else if (uri.startsWith("/help/")) {
@@ -230,7 +237,10 @@ public class Main extends HttpServlet implements XmppListener {
             pagesNewMessage.doPostNewMessage(sql, request, response);
         } else if (uri.equals("/login")) {
             login.doPostLogin(sql, request, response);
+        } else if (uri.equals("/signup")) {
+            signup.doPost(sql, request, response);
         } else if (uri.equals("/settings")) {
+            settings.doPost(sql, request, response);
         } else {
             response.sendError(405);
         }
diff --git a/src/java/com/juick/http/www/PageTemplates.java b/src/java/com/juick/http/www/PageTemplates.java
index 70f4d1ef..16e7818c 100644
--- a/src/java/com/juick/http/www/PageTemplates.java
+++ b/src/java/com/juick/http/www/PageTemplates.java
@@ -52,11 +52,11 @@ public class PageTemplates {
         out.println("<html>");
         out.println("<head>");
         out.println("  <title>" + title + "</title>");
-        out.println("  <link rel=\"stylesheet\" href=\"//static.juick.com/style3.2013022002.css\"/>");
+        out.println("  <link rel=\"stylesheet\" href=\"//static.juick.com/style3.2013032901.css\"/>");
         out.println("  <link rel=\"icon\" type=\"image/png\" href=\"//static.juick.com/favicon.png\"/>");
         out.println("  <script type=\"text/javascript\" src=\"//ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js\" defer=\"defer\"></script>");
         out.println("  <script type=\"text/javascript\" src=\"//ajax.googleapis.com/ajax/libs/swfobject/2.2/swfobject.js\" defer=\"defer\" async=\"async\"></script>");
-        out.println("  <script type=\"text/javascript\" src=\"//static.juick.com/scripts3.2013010300.js\" defer=\"defer\"></script>");
+        out.println("  <script type=\"text/javascript\" src=\"//static.juick.com/scripts3.2013032900.js\" defer=\"defer\"></script>");
         if (headers != null) {
             out.println(headers);
         }
diff --git a/src/java/com/juick/http/www/Settings.java b/src/java/com/juick/http/www/Settings.java
new file mode 100644
index 00000000..7ae0259d
--- /dev/null
+++ b/src/java/com/juick/http/www/Settings.java
@@ -0,0 +1,108 @@
+/*
+ * 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 java.io.IOException;
+import java.io.PrintWriter;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.SQLException;
+import java.util.Locale;
+import java.util.ResourceBundle;
+import javax.servlet.ServletException;
+import javax.servlet.http.Cookie;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ *
+ * @author Ugnich Anton
+ */
+public class Settings {
+
+    protected void doGet(Connection sql, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        com.juick.User visitor = Utils.getVisitorUser(sql, request);
+        Locale locale = request.getLocale();
+        ResourceBundle rb = ResourceBundle.getBundle("Login", locale);
+
+        response.setContentType("text/html; charset=UTF-8");
+        PrintWriter out = response.getWriter();
+        try {
+            PageTemplates.pageHead(out, rb.getString("Login"), "");
+            PageTemplates.pageNavigation(out, locale, visitor, null);
+
+            out.println("<div id=\"topwrapper\">");
+            out.println("<div id=\"wrapper\">");
+            out.println("<div id=\"content\">");
+            out.println("<form action=\"/login\" method=\"post\">");
+            out.println("<p>" + rb.getString("Username") + ": <input type=\"text\" name=\"username\"/></p>");
+            out.println("<p>" + rb.getString("Password") + ": <input type=\"password\" name=\"password\"/></p>");
+            out.println("<p><input type=\"submit\" value=\"    OK    \"/></p>");
+            out.println("</form>");
+            out.println("</div>");
+            out.println("</div>");
+            out.println("</div>"); // topwrapper
+
+            PageTemplates.pageFooter(request, out, locale, visitor, false);
+            PageTemplates.pageEnd(out);
+        } finally {
+            out.close();
+        }
+    }
+
+    protected void doPost(Connection sql, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        String username = request.getParameter("username");
+        String password = request.getParameter("password");
+        if (username == null || password == null || username.length() > 32 || password.isEmpty()) {
+            response.sendError(400);
+            return;
+        }
+
+        int uid = com.juick.server.UserQueries.checkPassword(sql, username, password);
+        if (uid > 0) {
+            String hash = com.juick.server.UserQueries.getHashByUID(sql, uid);
+            Cookie c = new Cookie("hash", hash);
+            c.setDomain(".juick.com");
+            c.setMaxAge(365 * 24 * 60 * 60);
+            response.addCookie(c);
+
+
+            if (uid > 0) {
+                PreparedStatement stmt = null;
+                try {
+                    stmt = sql.prepareStatement("DELETE FROM logins WHERE user_id=?");
+                    stmt.setInt(1, uid);
+                    stmt.executeUpdate();
+                } catch (SQLException e) {
+                    System.err.println(e);
+                } finally {
+                    Utils.finishSQL(null, stmt);
+                }
+            }
+
+            String referer = request.getHeader("Referer");
+            if (referer != null && referer.startsWith("http://juick.com/") && !referer.equals("http://juick.com/login")) {
+                response.sendRedirect(referer);
+            } else {
+                response.sendRedirect("/");
+            }
+        } else {
+            response.sendError(403);
+        }
+    }
+}
diff --git a/src/java/com/juick/http/www/SignUp.java b/src/java/com/juick/http/www/SignUp.java
new file mode 100644
index 00000000..1afbebbe
--- /dev/null
+++ b/src/java/com/juick/http/www/SignUp.java
@@ -0,0 +1,270 @@
+/*
+ * 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.io.PrintWriter;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.Locale;
+import java.util.ResourceBundle;
+import javax.servlet.ServletException;
+import javax.servlet.http.Cookie;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ *
+ * @author Ugnich Anton
+ */
+public class SignUp {
+
+    protected void doGet(Connection sql, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        com.juick.User visitor = Utils.getVisitorUser(sql, request);
+        Locale locale = request.getLocale();
+        ResourceBundle rb = ResourceBundle.getBundle("SignUp", locale);
+
+        String type = request.getParameter("type");
+        String hash = request.getParameter("hash");
+        if (type == null || type.isEmpty() || hash == null || hash.isEmpty() || hash.length() > 36 || !type.matches("^[a-zA-Z0-9\\-]+$") || !hash.matches("^[a-zA-Z0-9\\-]+$")) {
+            response.sendError(HttpServletResponse.SC_BAD_REQUEST);
+            return;
+        }
+
+        String account = null;
+        if (type.equals("fb")) {
+            account = getFacebookNameByHash(sql, hash);
+        } else if (type.equals("xmpp")) {
+            account = getJIDByHash(sql, hash);
+        }
+        if (account == null) {
+            response.sendError(HttpServletResponse.SC_BAD_REQUEST);
+            return;
+        }
+
+        response.setContentType("text/html; charset=UTF-8");
+        PrintWriter out = response.getWriter();
+        try {
+            PageTemplates.pageHead(out, rb.getString("Unknown account"), "");
+            PageTemplates.pageNavigation(out, locale, visitor, null);
+            out.println("<div id=\"topwrapper\">");
+            out.println("<div id=\"wrapper\">");
+            out.println("<div id=\"content\">");
+
+            out.print("<h1 class=\"signup-h1\">");
+            if (type.charAt(0) == 'f') {
+                out.print("<img src=\"//static.juick.com/settings/facebook.png\" alt=\"Facebook\"/>");
+            } else if (type.charAt(0) == 'x') {
+                out.print("<img src=\"//static.juick.com/settings/xmpp.png\" alt=\"XMPP\"/>");
+            }
+            out.println(account + "</h1>");
+
+            out.println("<h2 class=\"signup-h2\">" + rb.getString("Link with existing") + "</h2>");
+            out.println("<form action=\"/signup\" method=\"post\">");
+            out.println("<input type=\"hidden\" name=\"action\" value=\"link\"/>");
+            out.println("<input type=\"hidden\" name=\"type\" value=\"" + type + "\"/>");
+            out.println("<input type=\"hidden\" name=\"hash\" value=\"" + hash + "\"/>");
+            if (visitor != null) {
+                out.println("<input type=\"submit\" value=\"" + rb.getString("Link with this") + "\"/>");
+            } else {
+                out.println("<p>" + rb.getString("Username") + ": <input type=\"text\" name=\"username\"/></p>");
+                out.println("<p>" + rb.getString("Password") + ": <input type=\"password\" name=\"password\"/></p>");
+                out.println("<p><input type=\"submit\" value=\"    OK    \"/></p>");
+            }
+            out.println("</form>");
+
+            out.println("<hr class=\"signup-hr\"/>");
+
+            out.println("<h2 class=\"signup-h2\">" + rb.getString("Create new") + "</h2>");
+            out.println("<form action=\"/signup\" method=\"post\">");
+            out.println("<input type=\"hidden\" name=\"action\" value=\"new\"/>");
+            out.println("<input type=\"hidden\" name=\"type\" value=\"" + type + "\"/>");
+            out.println("<input type=\"hidden\" name=\"hash\" value=\"" + hash + "\"/>");
+            out.println("<p>" + rb.getString("Username") + ": <input type=\"text\" name=\"username\" id=\"username\" onblur=\"checkUsername()\"/><br/><i>" + rb.getString("Username restrictions") + "</i></p>");
+            out.println("<p>" + rb.getString("Password") + ": <input type=\"password\" name=\"password\"/><br/><i>" + rb.getString("Password restrictions") + "</i></p>");
+            out.println("<p>" + rb.getString("Language") + ": <select name=\"lang\">");
+            String langs[] = rb.getString("Languages").split(",");
+            String langcodes[] = rb.getString("Language codes").split(",");
+            for (int i = 0; i < langs.length; i++) {
+                out.println("  <option value=\"" + langcodes[i] + "\">" + langs[i] + "</option>");
+            }
+            out.println("</select></p>");
+            out.println("<p><input type=\"submit\" value=\"    OK    \"/></p>");
+            out.println("</form>");
+
+            out.println("</div>");
+            out.println("</div>");
+            out.println("</div>"); // topwrapper
+
+            PageTemplates.pageFooter(request, out, locale, visitor, false);
+            PageTemplates.pageEnd(out);
+        } finally {
+            out.close();
+        }
+    }
+
+    protected void doPost(Connection sql, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        com.juick.User visitor = Utils.getVisitorUser(sql, request);
+        int uid = 0;
+
+        String type = request.getParameter("type");
+        String hash = request.getParameter("hash");
+        if (type == null || type.isEmpty() || hash == null || hash.isEmpty() || hash.length() > 36 || !type.matches("^[a-zA-Z0-9\\-]+$") || !hash.matches("^[a-zA-Z0-9\\-]+$")) {
+            response.sendError(HttpServletResponse.SC_BAD_REQUEST);
+            return;
+        }
+
+        String action = request.getParameter("action");
+        if (action.charAt(0) == 'l') {
+
+            if (visitor == null) {
+                String username = request.getParameter("username");
+                String password = request.getParameter("password");
+                if (username == null || password == null || username.length() > 32 || password.isEmpty()) {
+                    response.sendError(HttpServletResponse.SC_BAD_REQUEST);
+                    return;
+                }
+                uid = com.juick.server.UserQueries.checkPassword(sql, username, password);
+            } else {
+                uid = visitor.UID;
+            }
+
+            if (uid == 0) {
+                response.sendError(HttpServletResponse.SC_FORBIDDEN);
+                return;
+            }
+
+            if (!(type.charAt(0) == 'f' && setFacebookUser(sql, hash, uid))
+                    && !(type.charAt(0) == 'x' && setJIDUser(sql, hash, uid))) {
+                response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+                return;
+            }
+
+        } else { // Create new account
+            String username = request.getParameter("username");
+            String password = request.getParameter("password");
+            String lang = request.getParameter("lang");
+            if (username == null || password == null || lang == null || username.length() < 2 || username.length() > 16 || !username.matches("^[a-zA-Z0-9\\-]+$") || password.length() < 6 || password.length() > 32 || lang.length() != 2) {
+                response.sendError(HttpServletResponse.SC_BAD_REQUEST);
+                return;
+            }
+
+            uid = UserQueries.createUser(sql, username, password, lang);
+            if (uid == 0) {
+                response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+                return;
+            }
+
+            if (!(type.charAt(0) == 'f' && setFacebookUser(sql, hash, uid))
+                    && !(type.charAt(0) == 'x' && setJIDUser(sql, hash, uid))) {
+                response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+                return;
+            }
+
+            visitor = null;
+        }
+
+        if (visitor == null) {
+            hash = com.juick.server.UserQueries.getHashByUID(sql, uid);
+            Cookie c = new Cookie("hash", hash);
+            c.setMaxAge(365 * 24 * 60 * 60);
+            response.addCookie(c);
+        }
+
+        response.sendRedirect("/");
+    }
+
+    private String getFacebookNameByHash(Connection sql, String hash) {
+        String ret = null;
+
+        PreparedStatement stmt = null;
+        ResultSet rs = null;
+        try {
+            stmt = sql.prepareStatement("SELECT fb_name,fb_link FROM facebook WHERE loginhash=?");
+            stmt.setString(1, hash);
+            rs = stmt.executeQuery();
+            if (rs.first()) {
+                ret = "<a href=\"" + rs.getString(2) + "\" rel=\"nofollow\">" + rs.getString(1) + "</a>";
+            }
+        } catch (SQLException e) {
+            System.err.println(e);
+        } finally {
+            Utils.finishSQL(rs, stmt);
+        }
+
+        return ret;
+    }
+
+    private boolean setFacebookUser(Connection sql, String hash, int uid) {
+        boolean ret = false;
+        PreparedStatement stmt = null;
+        try {
+            stmt = sql.prepareStatement("UPDATE facebook SET user_id=?,loginhash=NULL WHERE loginhash=?");
+            stmt.setInt(1, uid);
+            stmt.setString(2, hash);
+            stmt.executeUpdate();
+            ret = true;
+        } catch (SQLException e) {
+            System.err.println(e);
+        } finally {
+            Utils.finishSQL(null, stmt);
+        }
+        return ret;
+    }
+
+    private String getJIDByHash(Connection sql, String hash) {
+        String ret = null;
+
+        PreparedStatement stmt = null;
+        ResultSet rs = null;
+        try {
+            stmt = sql.prepareStatement("SELECT jid FROM jids WHERE loginhash=?");
+            stmt.setString(1, hash);
+            rs = stmt.executeQuery();
+            if (rs.first()) {
+                ret = rs.getString(1);
+            }
+        } catch (SQLException e) {
+            System.err.println(e);
+        } finally {
+            Utils.finishSQL(rs, stmt);
+        }
+
+        return ret;
+    }
+
+    private boolean setJIDUser(Connection sql, String hash, int uid) {
+        boolean ret = false;
+        PreparedStatement stmt = null;
+        try {
+            stmt = sql.prepareStatement("UPDATE jids SET user_id=?,loginhash=NULL WHERE loginhash=?");
+            stmt.setInt(1, uid);
+            stmt.setString(2, hash);
+            stmt.executeUpdate();
+            ret = true;
+        } catch (SQLException e) {
+            System.err.println(e);
+        } finally {
+            Utils.finishSQL(null, stmt);
+        }
+        return ret;
+    }
+}
diff --git a/src/java/com/juick/http/www/Utils.java b/src/java/com/juick/http/www/Utils.java
index 38550691..4c41555e 100644
--- a/src/java/com/juick/http/www/Utils.java
+++ b/src/java/com/juick/http/www/Utils.java
@@ -17,6 +17,10 @@
  */
 package com.juick.http.www;
 
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.net.URL;
+import java.net.URLConnection;
 import java.sql.Connection;
 import java.sql.ResultSet;
 import java.sql.SQLException;
@@ -118,4 +122,20 @@ public class Utils {
         ret = ret.replaceAll("@", "\\\\@");
         return ret;
     }
+
+    public static String fetchURL(String url) {
+        try {
+            URLConnection c = new URL(url).openConnection();
+            BufferedReader in = new BufferedReader(new InputStreamReader(c.getInputStream()));
+            String inputLine;
+            StringBuilder b = new StringBuilder();
+            while ((inputLine = in.readLine()) != null) {
+                b.append(inputLine).append("\n");
+            }
+            in.close();
+            return b.toString();
+        } catch (Exception e) {
+            return null;
+        }
+    }
 }