| /** |
| * |
| * 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.bookkeeper.http.servlet; |
| |
| import java.io.IOException; |
| import java.io.Writer; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import javax.servlet.http.HttpServlet; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import org.apache.bookkeeper.http.AbstractHttpHandlerFactory; |
| import org.apache.bookkeeper.http.HttpRouter; |
| import org.apache.bookkeeper.http.HttpServer; |
| import org.apache.bookkeeper.http.HttpServer.ApiType; |
| import org.apache.bookkeeper.http.HttpServiceProvider; |
| import org.apache.bookkeeper.http.service.ErrorHttpService; |
| import org.apache.bookkeeper.http.service.HttpEndpointService; |
| import org.apache.bookkeeper.http.service.HttpServiceRequest; |
| import org.apache.bookkeeper.http.service.HttpServiceResponse; |
| import org.apache.commons.io.IOUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Bookie http service servlet. |
| * |
| **/ |
| public class BookieHttpServiceServlet extends HttpServlet { |
| static final Logger LOG = LoggerFactory.getLogger(BookieHttpServiceServlet.class); |
| |
| // url to api |
| private final Map<String/*url*/, ApiType/*api*/> mappings = new ConcurrentHashMap<>(); |
| |
| public BookieHttpServiceServlet(){ |
| HttpRouter<ApiType> router = new HttpRouter<HttpServer.ApiType>( |
| new AbstractHttpHandlerFactory<ApiType>(BookieServletHttpServer.getBookieHttpServiceProvider()) { |
| @Override |
| public HttpServer.ApiType newHandler(HttpServer.ApiType apiType) { |
| return apiType; |
| } |
| }) { |
| @Override |
| public void bindHandler(String endpoint, HttpServer.ApiType mapping) { |
| mappings.put(endpoint, mapping); |
| } |
| }; |
| router.bindAll(); |
| } |
| |
| @Override |
| protected void service(HttpServletRequest httpRequest, HttpServletResponse httpResponse) throws IOException { |
| HttpServiceRequest request = new HttpServiceRequest() |
| .setMethod(httpServerMethod(httpRequest)) |
| .setParams(httpServletParams(httpRequest)) |
| .setBody(IOUtils.toString(httpRequest.getInputStream(), "UTF-8")); |
| String uri = httpRequest.getRequestURI(); |
| HttpServiceResponse response; |
| try { |
| HttpServer.ApiType apiType = mappings.get(uri); |
| HttpServiceProvider bookie = BookieServletHttpServer.getBookieHttpServiceProvider(); |
| if (bookie == null) { |
| httpResponse.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); |
| return; |
| } |
| HttpEndpointService httpEndpointService = bookie.provideHttpEndpointService(apiType); |
| if (httpEndpointService == null) { |
| httpResponse.sendError(HttpServletResponse.SC_NOT_FOUND); |
| return; |
| } |
| response = httpEndpointService.handle(request); |
| } catch (Throwable e) { |
| LOG.error("Error while service Bookie API request " + uri, e); |
| response = new ErrorHttpService().handle(request); |
| } |
| if (response != null) { |
| httpResponse.setStatus(response.getStatusCode()); |
| try (Writer out = httpResponse.getWriter()) { |
| out.write(response.getBody()); |
| } |
| } else { |
| httpResponse.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); |
| } |
| } |
| |
| |
| /** |
| * Convert http request parameters to a map. |
| */ |
| @SuppressWarnings("unchecked") |
| Map<String, String> httpServletParams(HttpServletRequest request) { |
| Map<String, String> map = new HashMap<>(); |
| for (Enumeration<String> param = request.getParameterNames(); |
| param.hasMoreElements();) { |
| String pName = param.nextElement(); |
| map.put(pName, request.getParameter(pName)); |
| } |
| return map; |
| } |
| |
| /** |
| * Get servlet request method and convert to the method that can be recognized by HttpServer. |
| */ |
| HttpServer.Method httpServerMethod(HttpServletRequest request) { |
| switch (request.getMethod()) { |
| case "POST": |
| return HttpServer.Method.POST; |
| case "DELETE": |
| return HttpServer.Method.DELETE; |
| case "PUT": |
| return HttpServer.Method.PUT; |
| case "GET": |
| return HttpServer.Method.GET; |
| default: |
| throw new UnsupportedOperationException("Unsupported http method"); |
| } |
| } |
| } |