[POLICY-73] replace openecomp for policy-engine
[policy/engine.git] / ONAP-PAP-REST / src / main / java / org / onap / policy / pap / xacml / restAuth / PAPAuthenticationFilter.java
diff --git a/ONAP-PAP-REST/src/main/java/org/onap/policy/pap/xacml/restAuth/PAPAuthenticationFilter.java b/ONAP-PAP-REST/src/main/java/org/onap/policy/pap/xacml/restAuth/PAPAuthenticationFilter.java
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+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP-PAP-REST
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.pap.xacml.restAuth;
+
+import java.io.IOException;
+
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.annotation.WebFilter;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+/**
+ * Servlet Filter implementation class PAPAuthenticationFilter
+ */
+@WebFilter("/*")
+public class PAPAuthenticationFilter implements Filter {
+
+       private static final Log logger = LogFactory.getLog(PAPAuthenticationFilter.class);
+       public static final String AUTHENTICATION_HEADER = "Authorization";
+
+       @Override
+       public void doFilter(ServletRequest request, ServletResponse response,
+                       FilterChain filter) throws IOException, ServletException {
+               
+               
+               if (request instanceof HttpServletRequest) {
+                       HttpServletRequest httpServletRequest = (HttpServletRequest) request;
+
+                       String authCredentials = null;
+                       String url = httpServletRequest.getRequestURI();
+                       
+                       logger.info("Request URI: " + url);
+                       System.out.println("Request URI: " + url);
+                       
+                       //getting authentication credentials
+                       if(url.contains("@Auth@")){
+                               int authIndex = url.lastIndexOf("@");
+                               int endAuthIndex = url.indexOf("/onap");
+                               authCredentials = "Basic " + url.substring(authIndex+1, endAuthIndex);
+                               
+                               //parse the url for /pap/onap/
+                               String url1 = url.substring(0, 4);
+                               String url2 = url.substring(endAuthIndex, url.length());
+                               url = url1 + url2;
+
+                       } else {
+                               authCredentials = httpServletRequest.getHeader(AUTHENTICATION_HEADER);
+                       }
+                       
+                       // Check Authentication credentials
+                       AuthenticationService authenticationService = new AuthenticationService();
+                       boolean authenticationStatus = authenticationService.authenticate(authCredentials);
+                       
+                       if (authenticationStatus) {
+                               //indicates the request comes from Traditional Admin Console or PolicyEngineAPI
+                               if (url.equals("/pap/")){
+                                       logger.info("Request comes from Traditional Admin Console or PolicyEngineAPI");                                         
+                                       
+                                       //forward request to the XACMLPAPServlet if authenticated
+                                       request.getRequestDispatcher("/pap/pap/").forward(request, response);
+                                       
+                               }else if (url.startsWith("/pap/onap/")){
+                                       
+                                       //indicates the request comes from the ONAP Portal onap-sdk-app
+                                       if(response instanceof HttpServletResponse) {
+                                               HttpServletResponse alteredResponse = ((HttpServletResponse)response);
+                                               addCorsHeader(alteredResponse);
+                                               logger.info("Request comes from Onap Portal");
+                                               //Spring dispatcher servlet is at the end of the filter chain at /pap/onap/ path
+                                               System.out.println("New Request URI: " + url);
+                                               filter.doFilter(request, response);
+                                               /*url = url.substring(url.indexOf("/pap/")+4);
+                                               request.getRequestDispatcher(url).forward(request, response);*/
+                                       }
+                                       
+                               }
+                               
+                       } else {
+                               if (response instanceof HttpServletResponse) {
+                                       HttpServletResponse httpServletResponse = (HttpServletResponse) response;
+                                       httpServletResponse.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
+                               }
+                       }
+
+               }
+       }
+       
+       //method to add CorsHeaders for onap portal rest call
+       private void addCorsHeader(HttpServletResponse response) {
+               logger.info("Adding Cors Response Headers!!!");
+               response.addHeader("Access-Control-Allow-Origin", "*");
+        response.addHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, HEAD");
+        response.addHeader("Access-Control-Allow-Headers", "X-PINGOTHER, Origin, X-Requested-With, Content-Type, Accept");
+        response.addHeader("Access-Control-Max-Age", "1728000");       
+       }
+
+       @Override
+       public void destroy() {
+       }
+
+       @Override
+       public void init(FilterConfig arg0) throws ServletException {
+       }
+}