juick-www: Facebook and VK login using scribejava

4 files changed, 134 insertions, 123 deletions

diff --git a/juick-www/src/main/java/com/juick/www/Utils.java b/juick-www/src/main/java/com/juick/www/Utils.java
index 37016ed2c..d7b5597da 100644
--- a/juick-www/src/main/java/com/juick/www/Utils.java
+++ b/juick-www/src/main/java/com/juick/www/Utils.java
@@ -32,6 +32,7 @@ import java.net.URL;
 import java.net.URLConnection;
 import java.nio.charset.StandardCharsets;
 import java.util.Arrays;
+import java.util.Optional;
 
 /**
  *
@@ -108,4 +109,15 @@ public class Utils {
             return null;
         }
     }
+    /**
+     * Returns the viewName to return for coming back to the sender url
+     *
+     * @param request Instance of {@link HttpServletRequest} or use an injected instance
+     * @return Optional with the view name. Recomended to use an alternativa url with
+     * {@link Optional#orElse(java.lang.Object)}
+     */
+    public static Optional<String> getPreviousPageByRequest(HttpServletRequest request)
+    {
+        return Optional.ofNullable(request.getHeader("Referer")).map(requestUrl -> "redirect:" + requestUrl);
+    }
 }
diff --git a/juick-www/src/main/java/com/juick/www/controllers/FacebookLogin.java b/juick-www/src/main/java/com/juick/www/controllers/FacebookLogin.java
index cc11f99a8..b1d275b62 100644
--- a/juick-www/src/main/java/com/juick/www/controllers/FacebookLogin.java
+++ b/juick-www/src/main/java/com/juick/www/controllers/FacebookLogin.java
@@ -19,27 +19,35 @@ package com.juick.www.controllers;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.github.scribejava.apis.FacebookApi;
+import com.github.scribejava.core.builder.ServiceBuilder;
+import com.github.scribejava.core.model.OAuth2AccessToken;
+import com.github.scribejava.core.model.OAuthRequest;
+import com.github.scribejava.core.model.Verb;
+import com.github.scribejava.core.oauth.OAuth20Service;
+import com.juick.server.util.HttpBadRequestException;
 import com.juick.service.CrosspostService;
 import com.juick.service.UserService;
 import com.juick.www.Utils;
-import com.juick.www.facebook.Graph;
-import org.apache.commons.lang3.CharEncoding;
+import com.juick.www.facebook.User;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.commons.lang3.math.NumberUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.core.env.Environment;
 import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.CookieValue;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RequestParam;
 
 import javax.inject.Inject;
 import javax.servlet.http.Cookie;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
-import java.io.UnsupportedEncodingException;
-import java.net.URLEncoder;
+import java.io.IOException;
 import java.util.UUID;
+import java.util.concurrent.ExecutionException;
 
 /**
  *
@@ -54,6 +62,7 @@ public class FacebookLogin {
     private final String FACEBOOK_SECRET;
     private final String FACEBOOK_REDIRECT = "http://juick.com/_fblogin";
     private final ObjectMapper mapper;
+    private ServiceBuilder serviceBuilder;
 
     @Inject
     CrosspostService crosspostService;
@@ -64,7 +73,7 @@ public class FacebookLogin {
     public FacebookLogin(Environment env) {
         FACEBOOK_APPID = env.getProperty("facebook_appid");
         FACEBOOK_SECRET = env.getProperty("facebook_secret");
-
+        serviceBuilder = new ServiceBuilder();
         mapper = new ObjectMapper();
         mapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);
         mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
@@ -72,82 +81,70 @@ public class FacebookLogin {
     }
 
     @RequestMapping(value = "/_fblogin", method = RequestMethod.GET)
-    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException {
-        String fbstate;
-
-        String code = request.getParameter("code");
+    protected String doGet(HttpServletRequest request,
+                         @RequestParam(required = false) String code,
+                         @RequestParam(required = false) String state,
+                         @CookieValue(required = false) String fbstate,
+                         HttpServletResponse response) throws IOException, ExecutionException, InterruptedException {
         if (StringUtils.isBlank(code)) {
             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?scope=publish_stream&client_id=" + FACEBOOK_APPID + "&redirect_uri=" + URLEncoder.encode(FACEBOOK_REDIRECT, CharEncoding.UTF_8) + "&state=" + fbstate);
-            return;
+            OAuth20Service facebookAuthService = serviceBuilder
+                    .apiKey(FACEBOOK_APPID)
+                    .apiSecret(FACEBOOK_SECRET)
+                    .callback(FACEBOOK_REDIRECT)
+                    .scope("publish_actions")
+                    .state(fbstate)
+                    .build(FacebookApi.instance());
+            return "redirect:" + facebookAuthService.getAuthorizationUrl();
         }
 
-        fbstate = Utils.getCookie(request, "fbstate");
-        if (fbstate == null || fbstate.isEmpty() || !fbstate.equals(request.getParameter("state"))) {
-            response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
-            return;
+        if (StringUtils.isBlank(fbstate) || !fbstate.equals(state)) {
+            throw new HttpBadRequestException();
         } 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, CharEncoding.UTF_8) + "&client_secret=" + FACEBOOK_SECRET + "&code=" + URLEncoder.encode(code, CharEncoding.UTF_8));
-        if (token == null || token.isEmpty() || !token.startsWith("access_token=")) {
-            logger.error("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()) {
+        OAuth20Service facebookService = serviceBuilder
+                .apiKey(FACEBOOK_APPID)
+                .apiSecret(FACEBOOK_SECRET)
+                .callback(FACEBOOK_REDIRECT)
+                .state(state)
+                .build(FacebookApi.instance());
+        OAuth2AccessToken token = facebookService.getAccessToken(code);
+        final OAuthRequest meRequest = new OAuthRequest(Verb.GET, "https://graph.facebook.com/v2.8/me?fields=id,name,link,verified");
+        facebookService.signRequest(token, meRequest);
+        String graph = facebookService.execute(meRequest).getBody();
+        if (StringUtils.isBlank(graph)) {
             logger.error("FACEBOOK GRAPH ERROR");
-            response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
-            return;
+            throw new HttpBadRequestException();
+        }
+        User fb = mapper.readValue(graph, User.class);
+        long fbID = NumberUtils.toLong(fb.getId(), 0);
+        if (fbID == 0 || StringUtils.isBlank(fb.getName()) || StringUtils.isBlank(fb.getLink())) {
+            throw new HttpBadRequestException();
         }
 
-        try {
-            Graph fb = mapper.readValue(graph, Graph.class);
-
-            long fbID = NumberUtils.toLong(fb.getId(), 0);
-            if (fbID == 0 || StringUtils.isBlank(fb.getName()) || StringUtils.isBlank(fb.getLink())) {
-                throw new Exception();
+        int uid = crosspostService.getUIDbyFBID(fbID);
+        if (uid > 0) {
+            if (!crosspostService.updateFacebookUser(fbID, token.getAccessToken(), fb.getName(), fb.getLink())) {
+                throw new HttpBadRequestException();
             }
-
-            int uid = crosspostService.getUIDbyFBID(fbID);
-            if (uid > 0) {
-                if (!crosspostService.updateFacebookUser(fbID, token, fb.getName(), fb.getLink())) {
-                    throw new Exception();
-                }
-                Cookie c = new Cookie("hash", userService.getHashByUID(uid));
-                c.setMaxAge(50 * 24 * 60 * 60);
-                response.addCookie(c);
-                response.setStatus(HttpServletResponse.SC_MOVED_TEMPORARILY);
-                response.setHeader("Location", "/");
-            } else if (fb.getVerified()) {
-                String loginhash = UUID.randomUUID().toString();
-                if (!crosspostService.createFacebookUser(fbID, loginhash, token, fb.getName(), fb.getLink())) {
-                    throw new Exception();
-                }
-                response.setStatus(HttpServletResponse.SC_MOVED_TEMPORARILY);
-                response.setHeader("Location", "/signup?type=fb&hash=" + loginhash);
-            } else {
-                throw new Exception();
+            Cookie c = new Cookie("hash", userService.getHashByUID(uid));
+            c.setMaxAge(50 * 24 * 60 * 60);
+            response.addCookie(c);
+            return Utils.getPreviousPageByRequest(request).orElse("/");
+        } else if (fb.getVerified()) {
+            String loginhash = UUID.randomUUID().toString();
+            if (!crosspostService.createFacebookUser(fbID, loginhash, token.getAccessToken(), fb.getName(), fb.getLink())) {
+                throw new HttpBadRequestException();
             }
-        } catch (Exception e) {
-            logger.error("fb error", e);
-            response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
-            return;
+            return "redirect:/signup?type=fb&hash=" + loginhash;
+        } else {
+            throw new HttpBadRequestException();
         }
     }
 }
diff --git a/juick-www/src/main/java/com/juick/www/controllers/VKontakteLogin.java b/juick-www/src/main/java/com/juick/www/controllers/VKontakteLogin.java
index d860a7bc5..6ecdfd4a7 100644
--- a/juick-www/src/main/java/com/juick/www/controllers/VKontakteLogin.java
+++ b/juick-www/src/main/java/com/juick/www/controllers/VKontakteLogin.java
@@ -19,26 +19,34 @@ package com.juick.www.controllers;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.github.scribejava.apis.VkontakteApi;
+import com.github.scribejava.core.builder.ServiceBuilder;
+import com.github.scribejava.core.model.OAuth2AccessToken;
+import com.github.scribejava.core.model.OAuthRequest;
+import com.github.scribejava.core.model.Verb;
+import com.github.scribejava.core.oauth.OAuth20Service;
+import com.juick.server.util.HttpBadRequestException;
 import com.juick.service.CrosspostService;
 import com.juick.service.UserService;
 import com.juick.www.Utils;
-import com.juick.www.vk.Token;
 import com.juick.www.vk.UsersResponse;
-import org.apache.commons.lang3.CharEncoding;
 import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.math.NumberUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.springframework.core.env.Environment;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RequestParam;
 
 import javax.inject.Inject;
 import javax.servlet.http.Cookie;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
-import java.net.URLEncoder;
 import java.util.UUID;
+import java.util.concurrent.ExecutionException;
 
 /**
  * @author Ugnich Anton
@@ -46,8 +54,8 @@ import java.util.UUID;
 @Controller
 public class VKontakteLogin {
     private static final Logger logger = LoggerFactory.getLogger(VKontakteLogin.class);
-    private static final String VK_APPID = "3544101";
-    private static final String VK_SECRET = "z2afNI8jA5lIpZ2jsTm1";
+    private final String VK_APPID;
+    private final String VK_SECRET;
     private static final String VK_REDIRECT = "http://juick.com/_vklogin";
 
     @Inject
@@ -55,7 +63,13 @@ public class VKontakteLogin {
     @Inject
     UserService userService;
 
-    public VKontakteLogin() {
+    private ServiceBuilder serviceBuilder;
+
+    @Inject
+    public VKontakteLogin(Environment env) {
+        VK_APPID = env.getProperty("vk_appid");
+        VK_SECRET = env.getProperty("vk_secret");
+        serviceBuilder = new ServiceBuilder();
         mapper = new ObjectMapper();
         mapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);
         mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
@@ -65,66 +79,52 @@ public class VKontakteLogin {
     private final ObjectMapper mapper;
 
     @RequestMapping(value = "/_vklogin", method = RequestMethod.GET)
-    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
-        String code = request.getParameter("code");
+    protected String doGet(HttpServletRequest request,
+                           @RequestParam(required = false) String code,
+                           HttpServletResponse response) throws IOException, ExecutionException, InterruptedException {
         if (StringUtils.isBlank(code)) {
-            response.setStatus(HttpServletResponse.SC_MOVED_TEMPORARILY);
-            response.setHeader("Location", "https://oauth.vk.com/authorize?client_id=" + VK_APPID + "&redirect_uri=" + URLEncoder.encode(VK_REDIRECT, CharEncoding.UTF_8) + "&scope=friends,wall,offline&response_type=code");
-            return;
+            OAuth20Service vkAuthService = serviceBuilder
+                    .apiKey(VK_APPID)
+                    .apiSecret(VK_SECRET)
+                    .scope("friends,wall,offline")
+                    .callback(VK_REDIRECT)
+                    .build(VkontakteApi.instance());
+            return "redirect:" + vkAuthService.getAuthorizationUrl();
         }
 
+        OAuth20Service vkService = serviceBuilder
+                .apiKey(VK_APPID)
+                .apiSecret(VK_SECRET)
+                .build(VkontakteApi.instance());
+        OAuth2AccessToken token = vkService.getAccessToken(code);
 
-        String tokenjson = Utils.fetchURL("https://oauth.vk.com/access_token?client_id=" + VK_APPID + "&redirect_uri=" + URLEncoder.encode(VK_REDIRECT, CharEncoding.UTF_8) + "&client_secret=" + VK_SECRET + "&code=" + URLEncoder.encode(code, CharEncoding.UTF_8));
-        if (tokenjson == null || tokenjson.isEmpty()) {
-            logger.error("VK TOKEN EMPTY");
-            response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
-            return;
-        }
-        String token = null;
-        long vkID = 0;
-        Token json = mapper.readValue(tokenjson, Token.class);
-        token = json.getAccessToken();
-        vkID = json.getUserId();
-        if (token == null || vkID == 0) {
-            logger.error("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()) {
-            logger.error("VK GRAPH ERROR");
-            response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
-            return;
-        }
+        OAuthRequest meRequest = new OAuthRequest(Verb.GET, "https://api.vk.com/method/users.get?fields=screen_name");
+        vkService.signRequest(token, meRequest);
+        String graph = vkService.execute(meRequest).getBody();
 
-        try {
-            com.juick.www.vk.User jsonUser = mapper.readValue(graph, UsersResponse.class).getUsers().get(0);
-            String vkName = jsonUser.getFirstName() + " " + jsonUser.getLastName();
-            String vkLink = jsonUser.getScreenName();
+        com.juick.www.vk.User jsonUser = mapper.readValue(graph, UsersResponse.class).getUsers().get(0);
+        String vkName = jsonUser.getFirstName() + " " + jsonUser.getLastName();
+        String vkLink = jsonUser.getScreenName();
 
-            if (vkName == null || vkLink == null || vkName.isEmpty() || vkName.length() == 1 || vkLink.isEmpty()) {
-                throw new Exception();
-            }
+        if (vkName.length() == 1 || StringUtils.isBlank(vkLink)) {
+            logger.error("vk user error");
+            throw new HttpBadRequestException();
+        }
 
-            int uid = crosspostService.getUIDbyVKID(vkID);
-            if (uid > 0) {
-                Cookie c = new Cookie("hash", userService.getHashByUID(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 (!crosspostService.createVKUser(vkID, loginhash, token, vkName, vkLink)) {
-                    throw new Exception();
-                }
-                response.setStatus(HttpServletResponse.SC_MOVED_TEMPORARILY);
-                response.setHeader("Location", "/signup?type=vk&hash=" + loginhash);
+        Long vkID = NumberUtils.toLong(jsonUser.getUid(), 0);
+        int uid = crosspostService.getUIDbyVKID(vkID);
+        if (uid > 0) {
+            Cookie c = new Cookie("hash", userService.getHashByUID(uid));
+            c.setMaxAge(50 * 24 * 60 * 60);
+            response.addCookie(c);
+            return Utils.getPreviousPageByRequest(request).orElse("/");
+        } else {
+            String loginhash = UUID.randomUUID().toString();
+            if (!crosspostService.createVKUser(vkID, loginhash, token.getAccessToken(), vkName, vkLink)) {
+                logger.error("create vk user error");
+                throw new HttpBadRequestException();
             }
-        } catch (Exception e) {
-            logger.error("JSON ERROR", e);
-            response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+            return "redirect:/signup?type=vk&hash=" + loginhash;
         }
     }
 }
diff --git a/juick-www/src/main/java/com/juick/www/facebook/Graph.java b/juick-www/src/main/java/com/juick/www/facebook/User.java
index f4c6ab2a1..763e98d7f 100644
--- a/juick-www/src/main/java/com/juick/www/facebook/Graph.java
+++ b/juick-www/src/main/java/com/juick/www/facebook/User.java
@@ -1,11 +1,13 @@
 package com.juick.www.facebook;
 
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
 /**
  * Created by vitalyster on 28.11.2016.
  */
-public class Graph {
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class User {
     private String id;
     private String name;
     private String link;