Vkontakte signup

1 files changed, 154 insertions, 0 deletions

diff --git a/src/java/com/juick/http/www/VKontakteLogin.java b/src/java/com/juick/http/www/VKontakteLogin.java
new file mode 100644
index 00000000..e7252b57
--- /dev/null
+++ b/src/java/com/juick/http/www/VKontakteLogin.java
@@ -0,0 +1,154 @@
+/*
+ * 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 = "3531222";
+    private static final String VK_SECRET = "EhgW6VJrl02oFPO0buiJ";
+    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);
+            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) {
+            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;
+    }
+}