Merge branch 'application-mgt-new' into 'application-mgt-new'

Implement Logout Handler and Refactoring

See merge request entgra/carbon-device-mgt!151

components/ui-request-interceptor/io.entgra.ui.request.interceptor/src/main/java/io/entgra/ui/request/interceptor/InvokerHandler.java

@@ -205,8 +205,7 @@ public class InvokerHandler extends HttpServlet {
                     entityBuilder.addPart(item.getFieldName(), new InputStreamBody(item.getInputStream(),
                             ContentType.create(item.getContentType()), item.getName()));
                 } else {
-                    entityBuilder.addTextBody(item.getFieldName(), item.getString(),
-                            ContentType.create(item.getContentType()));
+                    entityBuilder.addTextBody(item.getFieldName(), item.getString());
                 }
             }
             proxyRequest.setEntity(entityBuilder.build());

components/ui-request-interceptor/io.entgra.ui.request.interceptor/src/main/java/io/entgra/ui/request/interceptor/LoginHandler.java

@@ -131,7 +131,7 @@ public class LoginHandler extends HttpServlet {
                         clientAppResponse.getData(), scopes)) {
                     ProxyResponse proxyResponse = new ProxyResponse();
                     proxyResponse.setCode(HttpStatus.SC_OK);
-                    proxyResponse.setUrl(serverUrl + "/" + platform);
+                    proxyResponse.setUrl(serverUrl + HandlerConstants.PATH_SEPARATOR + platform);
                     HandlerUtil.handleSuccess(req, resp, serverUrl, platform, proxyResponse);
                     return;
                 }
@@ -163,7 +163,7 @@ public class LoginHandler extends HttpServlet {
                 String clientId = jClientAppResultAsJsonObject.get("client_id").getAsString();
                 String clientSecret = jClientAppResultAsJsonObject.get("client_secret").getAsString();
                 String encodedClientApp = Base64.getEncoder()
-                        .encodeToString((clientId + ":" + clientSecret).getBytes());
+                        .encodeToString((clientId + HandlerConstants.COLON + clientSecret).getBytes());
 
                 ProxyResponse tokenResultResponse = getTokenResult(encodedClientApp, scopes);
 
@@ -230,8 +230,9 @@ public class LoginHandler extends HttpServlet {
     private static void validateLoginRequest(HttpServletRequest req, HttpServletResponse resp) throws LoginException {
         username = req.getParameter("username");
         password = req.getParameter("password");
-        platform = req.getParameter("platform");
-        serverUrl = req.getScheme() + "://" + req.getServerName() + ":" + req.getServerPort();
+        platform = req.getParameter(HandlerConstants.PLATFORM);
+        serverUrl = req.getScheme() + HandlerConstants.SCHEME_SEPARATOR + req.getServerName() + HandlerConstants.COLON
+                    + req.getServerPort();
         uiConfigUrl = serverUrl + HandlerConstants.UI_CONFIG_ENDPOINT;
 
         try {
@@ -240,7 +241,8 @@ public class LoginHandler extends HttpServlet {
                 throw new LoginException("Invalid login request. Platform parameter is Null.");
             }
             if (username == null || password == null) {
-                resp.sendRedirect(serverUrl + "/" + platform + HandlerConstants.DEFAULT_ERROR_CALLBACK);
+                resp.sendRedirect(serverUrl + HandlerConstants.PATH_SEPARATOR + platform
+                        + HandlerConstants.DEFAULT_ERROR_CALLBACK);
                 throw new LoginException(
                         " Invalid login request. Username or Password is not received for login request.");
             }

components/ui-request-interceptor/io.entgra.ui.request.interceptor/src/main/java/io/entgra/ui/request/interceptor/LogoutHandler.java

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2019, Entgra (Pvt) Ltd. (http://www.entgra.io) All Rights Reserved.
+ *
+ * Entgra (Pvt) Ltd. licenses this file to you under the Apache License,
+ * Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package io.entgra.ui.request.interceptor;
+
+import io.entgra.ui.request.interceptor.util.HandlerConstants;
+import io.entgra.ui.request.interceptor.util.HandlerUtil;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.http.HttpStatus;
+import org.wso2.carbon.device.application.mgt.common.ProxyResponse;
+
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpSession;
+import java.io.IOException;
+
+@WebServlet("/logout")
+public class LogoutHandler extends HttpServlet {
+    private static final Log log = LogFactory.getLog(LogoutHandler.class);
+
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) {
+        String serverUrl = req.getScheme() + HandlerConstants.SCHEME_SEPARATOR + req.getServerName()
+                + HandlerConstants.COLON + req.getServerPort();
+        String platform = req.getParameter(HandlerConstants.PLATFORM);
+        HttpSession httpSession = req.getSession(false);
+        if (httpSession != null) {
+            httpSession.invalidate();
+        } else {
+            log.warn("No active session is available. User may not be logged in. Redirecting to the login page");
+        }
+
+        ProxyResponse proxyResponse = new ProxyResponse();
+        proxyResponse.setCode(HttpStatus.SC_OK);
+        proxyResponse.setUrl(serverUrl + HandlerConstants.PATH_SEPARATOR + platform + HandlerConstants.LOGIN_PAGE);
+        try {
+            HandlerUtil.handleSuccess(req, resp, serverUrl, platform, proxyResponse);
+        } catch (IOException e) {
+            log.error("Error occurred when processing logout request.", e);
+        }
+    }
+}

components/ui-request-interceptor/io.entgra.ui.request.interceptor/src/main/java/io/entgra/ui/request/interceptor/util/HandlerConstants.java

@@ -23,9 +23,9 @@ public class HandlerConstants {
     public static final String APP_REG_ENDPOINT = "/api-application-registration/register";
     public static final String UI_CONFIG_ENDPOINT = "/api/application-mgt/v1.0/config/ui-config";
     public static final String TOKEN_ENDPOINT = "/oauth2/token";
+    public static final String LOGIN_PAGE = "/login";
     public static final String BASIC = "Basic ";
     public static final String BEARER = "Bearer ";
-    public static final String COLON = ":";
     public static final String TAGS_KEY = "tags";
     public static final String APP_NAME_KEY = "applicationName";
     public static final String SESSION_AUTH_DATA_KEY = "application-mgt";
@@ -38,6 +38,9 @@ public class HandlerConstants {
     public static final String TOKEN_IS_EXPIRED = "ACCESS_TOKEN_IS_EXPIRED";
 
     public static final String X_PLATFORM_HEADER = "X-Platform";
+    public static final String SCHEME_SEPARATOR = "://";
+    public static final String COLON = ":";
+    public static final String PATH_SEPARATOR = "/";
 
     public static final int INTERNAL_ERROR_CODE = 500;
     public static final long TIMEOUT = 1200;