001/*
002 * Copyright 2012-2017 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.boot.devtools.restart.server;
018
019import java.io.IOException;
020import java.io.ObjectInputStream;
021
022import org.apache.commons.logging.Log;
023import org.apache.commons.logging.LogFactory;
024
025import org.springframework.boot.devtools.restart.classloader.ClassLoaderFiles;
026import org.springframework.http.HttpStatus;
027import org.springframework.http.server.ServerHttpRequest;
028import org.springframework.http.server.ServerHttpResponse;
029import org.springframework.util.Assert;
030
031/**
032 * A HTTP server that can be used to upload updated {@link ClassLoaderFiles} and trigger
033 * restarts.
034 *
035 * @author Phillip Webb
036 * @since 1.3.0
037 * @see RestartServer
038 */
039public class HttpRestartServer {
040
041        private static final Log logger = LogFactory.getLog(HttpRestartServer.class);
042
043        private final RestartServer server;
044
045        /**
046         * Create a new {@link HttpRestartServer} instance.
047         * @param sourceFolderUrlFilter the source filter used to link remote folder to the
048         * local classpath
049         */
050        public HttpRestartServer(SourceFolderUrlFilter sourceFolderUrlFilter) {
051                Assert.notNull(sourceFolderUrlFilter, "SourceFolderUrlFilter must not be null");
052                this.server = new RestartServer(sourceFolderUrlFilter);
053        }
054
055        /**
056         * Create a new {@link HttpRestartServer} instance.
057         * @param restartServer the underlying restart server
058         */
059        public HttpRestartServer(RestartServer restartServer) {
060                Assert.notNull(restartServer, "RestartServer must not be null");
061                this.server = restartServer;
062        }
063
064        /**
065         * Handle a server request.
066         * @param request the request
067         * @param response the response
068         * @throws IOException in case of I/O errors
069         */
070        public void handle(ServerHttpRequest request, ServerHttpResponse response)
071                        throws IOException {
072                try {
073                        Assert.state(request.getHeaders().getContentLength() > 0, "No content");
074                        ObjectInputStream objectInputStream = new ObjectInputStream(
075                                        request.getBody());
076                        ClassLoaderFiles files = (ClassLoaderFiles) objectInputStream.readObject();
077                        objectInputStream.close();
078                        this.server.updateAndRestart(files);
079                        response.setStatusCode(HttpStatus.OK);
080                }
081                catch (Exception ex) {
082                        logger.warn("Unable to handler restart server HTTP request", ex);
083                        response.setStatusCode(HttpStatus.INTERNAL_SERVER_ERROR);
084                }
085        }
086
087}