Java tutorial
/* * EXPERMENTAL FILE: This file is from an apache commons tutorial and will be modified it is used for some http server experiments. * * ==================================================================== * 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. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Software Foundation. For more * information on the Apache Software Foundation, please see * <http://www.apache.org/>. * */ package yucatan.communication.server; import java.io.File; import java.io.IOException; import java.io.InterruptedIOException; import java.net.InetSocketAddress; import java.net.URL; import java.net.URLDecoder; import java.security.KeyStore; import java.util.Locale; import javax.net.ssl.KeyManager; import javax.net.ssl.KeyManagerFactory; import javax.net.ssl.SSLContext; import org.apache.http.HttpException; import org.apache.http.HttpRequest; import org.apache.http.HttpResponse; import org.apache.http.HttpResponseInterceptor; import org.apache.http.HttpStatus; import org.apache.http.MethodNotSupportedException; import org.apache.http.entity.ContentType; import org.apache.http.impl.DefaultConnectionReuseStrategy; import org.apache.http.impl.nio.DefaultHttpServerIODispatch; import org.apache.http.impl.nio.DefaultNHttpServerConnection; import org.apache.http.impl.nio.DefaultNHttpServerConnectionFactory; import org.apache.http.impl.nio.SSLNHttpServerConnectionFactory; import org.apache.http.impl.nio.reactor.DefaultListeningIOReactor; import org.apache.http.nio.NHttpConnection; import org.apache.http.nio.NHttpConnectionFactory; import org.apache.http.nio.NHttpServerConnection; import org.apache.http.nio.entity.NFileEntity; import org.apache.http.nio.entity.NStringEntity; import org.apache.http.nio.protocol.BasicAsyncRequestConsumer; import org.apache.http.nio.protocol.BasicAsyncResponseProducer; import org.apache.http.nio.protocol.HttpAsyncExchange; import org.apache.http.nio.protocol.HttpAsyncRequestConsumer; import org.apache.http.nio.protocol.HttpAsyncRequestHandler; import org.apache.http.nio.protocol.HttpAsyncRequestHandlerRegistry; import org.apache.http.nio.protocol.HttpAsyncService; import org.apache.http.nio.reactor.IOEventDispatch; import org.apache.http.nio.reactor.ListeningIOReactor; import org.apache.http.params.CoreConnectionPNames; import org.apache.http.params.CoreProtocolPNames; import org.apache.http.params.HttpParams; import org.apache.http.params.SyncBasicHttpParams; import org.apache.http.protocol.ExecutionContext; import org.apache.http.protocol.HttpContext; import org.apache.http.protocol.HttpProcessor; import org.apache.http.protocol.ImmutableHttpProcessor; import org.apache.http.protocol.ResponseConnControl; import org.apache.http.protocol.ResponseContent; import org.apache.http.protocol.ResponseDate; import org.apache.http.protocol.ResponseServer; /** * HTTP/1.1 file server based on the non-blocking I/O model and capable of direct channel * (zero copy) data transfer. */ public class NHttpServer { public static void main(String[] args) throws Exception { if (args.length < 1) { System.err.println("Please specify document root directory"); System.exit(1); } // Document root directory File docRoot = new File(args[0]); int port = 8080; if (args.length >= 2) { port = Integer.parseInt(args[1]); } // HTTP parameters for the server HttpParams params = new SyncBasicHttpParams(); params.setIntParameter(CoreConnectionPNames.SO_TIMEOUT, 5000) .setIntParameter(CoreConnectionPNames.SOCKET_BUFFER_SIZE, 8 * 1024) .setBooleanParameter(CoreConnectionPNames.TCP_NODELAY, true) .setParameter(CoreProtocolPNames.ORIGIN_SERVER, "HttpTest/1.1"); // Create HTTP protocol processing chain HttpProcessor httpproc = new ImmutableHttpProcessor(new HttpResponseInterceptor[] { // Use standard server-side protocol interceptors new ResponseDate(), new ResponseServer(), new ResponseContent(), new ResponseConnControl() }); // Create request handler registry HttpAsyncRequestHandlerRegistry reqistry = new HttpAsyncRequestHandlerRegistry(); // Register the default handler for all URIs reqistry.register("*", new HttpFileHandler(docRoot)); // Create server-side HTTP protocol handler HttpAsyncService protocolHandler = new HttpAsyncService(httpproc, new DefaultConnectionReuseStrategy(), reqistry, params) { @Override public void connected(final NHttpServerConnection conn) { System.out.println(conn + ": connection open"); super.connected(conn); } @Override public void closed(final NHttpServerConnection conn) { System.out.println(conn + ": connection closed"); super.closed(conn); } }; // Create HTTP connection factory NHttpConnectionFactory<DefaultNHttpServerConnection> connFactory; if (port == 8443) { // Initialize SSL context ClassLoader cl = NHttpServer.class.getClassLoader(); URL url = cl.getResource("my.keystore"); if (url == null) { System.out.println("Keystore not found"); System.exit(1); } KeyStore keystore = KeyStore.getInstance("jks"); keystore.load(url.openStream(), "secret".toCharArray()); KeyManagerFactory kmfactory = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm()); kmfactory.init(keystore, "secret".toCharArray()); KeyManager[] keymanagers = kmfactory.getKeyManagers(); SSLContext sslcontext = SSLContext.getInstance("TLS"); sslcontext.init(keymanagers, null, null); connFactory = new SSLNHttpServerConnectionFactory(sslcontext, null, params); } else { connFactory = new DefaultNHttpServerConnectionFactory(params); } // Create server-side I/O event dispatch IOEventDispatch ioEventDispatch = new DefaultHttpServerIODispatch(protocolHandler, connFactory); // Create server-side I/O reactor ListeningIOReactor ioReactor = new DefaultListeningIOReactor(); try { // Listen of the given port ioReactor.listen(new InetSocketAddress(port)); // Ready to go! ioReactor.execute(ioEventDispatch); } catch (InterruptedIOException ex) { System.err.println("Interrupted"); } catch (IOException e) { System.err.println("I/O error: " + e.getMessage()); } System.out.println("Shutdown"); } static class HttpFileHandler implements HttpAsyncRequestHandler<HttpRequest> { private final File docRoot; public HttpFileHandler(final File docRoot) { super(); this.docRoot = docRoot; } public HttpAsyncRequestConsumer<HttpRequest> processRequest(final HttpRequest request, final HttpContext context) { // Buffer request content in memory for simplicity return new BasicAsyncRequestConsumer(); } public void handle(final HttpRequest request, final HttpAsyncExchange httpexchange, final HttpContext context) throws HttpException, IOException { HttpResponse response = httpexchange.getResponse(); handleInternal(request, response, context); httpexchange.submitResponse(new BasicAsyncResponseProducer(response)); } private void handleInternal(final HttpRequest request, final HttpResponse response, final HttpContext context) throws HttpException, IOException { String method = request.getRequestLine().getMethod().toUpperCase(Locale.ENGLISH); if (!method.equals("GET") && !method.equals("HEAD") && !method.equals("POST")) { throw new MethodNotSupportedException(method + " method not supported"); } String target = request.getRequestLine().getUri(); final File file = new File(this.docRoot, URLDecoder.decode(target, "UTF-8")); if (!file.exists()) { response.setStatusCode(HttpStatus.SC_NOT_FOUND); NStringEntity entity = new NStringEntity( "<html><body><h1>File" + file.getPath() + " not found</h1></body></html>", ContentType.create("text/html", "UTF-8")); response.setEntity(entity); System.out.println("File " + file.getPath() + " not found"); } else if (!file.canRead() || file.isDirectory()) { response.setStatusCode(HttpStatus.SC_FORBIDDEN); NStringEntity entity = new NStringEntity("<html><body><h1>Access denied</h1></body></html>", ContentType.create("text/html", "UTF-8")); response.setEntity(entity); System.out.println("Cannot read file " + file.getPath()); } else { NHttpConnection conn = (NHttpConnection) context.getAttribute(ExecutionContext.HTTP_CONNECTION); response.setStatusCode(HttpStatus.SC_OK); NFileEntity body = new NFileEntity(file, ContentType.create("text/html")); response.setEntity(body); System.out.println(conn + ": serving file " + file.getPath()); } } } }