| /* |
| * 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.processors.standard; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| import java.util.Map; |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServlet; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import javax.ws.rs.core.Response.Status; |
| |
| import org.apache.nifi.flowfile.attributes.StandardFlowFileMediaType; |
| import org.apache.nifi.stream.io.StreamUtils; |
| import org.apache.nifi.util.file.FileUtils; |
| |
| public class CaptureServlet extends HttpServlet { |
| |
| private static final long serialVersionUID = 8402271018449653919L; |
| |
| private volatile byte[] lastPost; |
| private volatile Map<String, String> lastPostHeaders; |
| |
| public byte[] getLastPost() { |
| return lastPost; |
| } |
| |
| public Map<String, String> getLastPostHeaders() { |
| return lastPostHeaders; |
| } |
| |
| @Override |
| protected void doPost(final HttpServletRequest request, final HttpServletResponse response) throws ServletException, IOException { |
| final ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| |
| // Capture all the headers for reference. Intentionally choosing to not special handling for headers with multiple values for clarity |
| final Enumeration<String> headerNames = request.getHeaderNames(); |
| lastPostHeaders = new HashMap<>(); |
| while (headerNames.hasMoreElements()) { |
| final String nextHeader = headerNames.nextElement(); |
| lastPostHeaders.put(nextHeader, request.getHeader(nextHeader)); |
| } |
| |
| try { |
| StreamUtils.copy(request.getInputStream(), baos); |
| this.lastPost = baos.toByteArray(); |
| } finally { |
| FileUtils.closeQuietly(baos); |
| } |
| response.setStatus(Status.OK.getStatusCode()); |
| } |
| |
| @Override |
| protected void doHead(final HttpServletRequest request, final HttpServletResponse response) throws ServletException, IOException { |
| final String acceptHeader = String.format("%s,%s", StandardFlowFileMediaType.VERSION_3.getMediaType(), StandardFlowFileMediaType.VERSION_2.getMediaType()); |
| response.setHeader("Accept", acceptHeader); |
| response.setHeader("x-nifi-transfer-protocol-version", "1"); |
| // Unless an acceptGzip parameter is explicitly set to false, respond that this server accepts gzip |
| if (!Boolean.toString(false).equalsIgnoreCase(request.getParameter("acceptGzip"))) { |
| response.setHeader("Accept-Encoding", "gzip"); |
| } |
| } |
| } |