| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF 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 org.apache.nifi.web; |
| |
| import java.security.cert.X509Certificate; |
| import javax.servlet.http.HttpServletRequest; |
| |
| /** |
| * An implementation of the ConfigurationRequestContext that retrieves configuration |
| * from a HttpServletRequest instance. |
| */ |
| public class HttpServletRequestContext implements NiFiWebRequestContext { |
| |
| private static final String ID_PARAM = "id"; |
| |
| private final UiExtensionType extensionType; |
| private final HttpServletRequest request; |
| |
| public HttpServletRequestContext(final UiExtensionType extensionType, final HttpServletRequest request) { |
| this.extensionType = extensionType; |
| this.request = request; |
| } |
| |
| @Override |
| public UiExtensionType getExtensionType() { |
| return extensionType; |
| } |
| |
| @Override |
| public String getProxiedEntitiesChain() { |
| String xProxiedEntitiesChain = request.getHeader("X-ProxiedEntitiesChain"); |
| final X509Certificate cert = extractClientCertificate(request); |
| if (cert != null) { |
| final String extractedPrincipal = extractPrincipal(cert); |
| final String formattedPrincipal = formatProxyDn(extractedPrincipal); |
| if (xProxiedEntitiesChain == null || xProxiedEntitiesChain.trim().isEmpty()) { |
| xProxiedEntitiesChain = formattedPrincipal; |
| } else { |
| xProxiedEntitiesChain += formattedPrincipal; |
| } |
| } |
| |
| return xProxiedEntitiesChain; |
| } |
| |
| /** |
| * @return the protocol scheme of the HttpServletRequest instance. |
| */ |
| @Override |
| public String getScheme() { |
| return request.getScheme(); |
| } |
| |
| /** |
| * @return the ID retrieved from the request parameter with key |
| * equal to "id". |
| */ |
| @Override |
| public String getId() { |
| return request.getParameter(ID_PARAM); |
| } |
| |
| /** |
| * Utility methods that have been copied into this class to reduce the |
| * dependency footprint of this artifact. These utility methods typically |
| * live in web-utilities but that would pull in spring, jersey, jackson, |
| * etc. |
| */ |
| private X509Certificate extractClientCertificate(HttpServletRequest request) { |
| X509Certificate[] certs = (X509Certificate[]) request.getAttribute("javax.servlet.request.X509Certificate"); |
| |
| if (certs != null && certs.length > 0) { |
| return certs[0]; |
| } |
| |
| return null; |
| } |
| |
| private String extractPrincipal(X509Certificate cert) { |
| return cert.getSubjectDN().getName().trim(); |
| } |
| |
| private String formatProxyDn(String dn) { |
| return "<" + dn + ">"; |
| } |
| } |