Java tutorial
/* * ==================================================================== * 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 thrift; import java.io.File; import java.io.IOException; import java.io.InterruptedIOException; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.net.ServerSocket; import java.net.Socket; import java.net.URLDecoder; import java.util.Collection; import java.util.Iterator; import java.util.Locale; import org.apache.http.ConnectionClosedException; import org.apache.http.HttpEntity; import org.apache.http.HttpEntityEnclosingRequest; import org.apache.http.HttpException; import org.apache.http.HttpRequest; import org.apache.http.HttpResponse; import org.apache.http.HttpServerConnection; import org.apache.http.HttpStatus; import org.apache.http.MethodNotSupportedException; import org.apache.http.entity.ContentProducer; import org.apache.http.entity.EntityTemplate; import org.apache.http.entity.FileEntity; import org.apache.http.impl.DefaultHttpResponseFactory; import org.apache.http.impl.DefaultHttpServerConnection; import org.apache.http.impl.NoConnectionReuseStrategy; import org.apache.http.params.BasicHttpParams; import org.apache.http.params.CoreConnectionPNames; import org.apache.http.params.CoreProtocolPNames; import org.apache.http.params.HttpParams; import org.apache.http.protocol.BasicHttpContext; import org.apache.http.protocol.BasicHttpProcessor; import org.apache.http.protocol.HttpContext; import org.apache.http.protocol.HttpProcessor; import org.apache.http.protocol.HttpRequestHandler; import org.apache.http.protocol.HttpRequestHandlerRegistry; import org.apache.http.protocol.HttpService; import org.apache.http.util.EntityUtils; import org.apache.log4j.Logger; import org.apache.thrift.TProcessor; import org.apache.thrift.protocol.TJSONProtocol; import org.apache.thrift.protocol.TProtocol; import org.apache.thrift.server.TServer; import org.apache.thrift.server.TSimpleServer; import org.apache.thrift.server.TServer.Args; import org.apache.thrift.transport.TMemoryBuffer; import org.apache.thrift.transport.TServerSocket; import org.apache.thrift.transport.TServerTransport; import tutorial.Calculator; import tutorial.Calculator.Iface; import eu.medsea.mimeutil.MimeType; import eu.medsea.mimeutil.MimeUtil2; import eu.medsea.mimeutil.detector.ExtensionMimeDetector; /** * Basic, yet fully functional and spec compliant, HTTP/1.1 file server. * <p> * Please note the purpose of this application is demonstrate the usage of * HttpCore APIs. It is NOT intended to demonstrate the most efficient way of * building an HTTP file server. * * */ public class Httpd { static Logger logger = Logger.getLogger("Httpd"); public static void main(String[] args) throws Exception { if (args.length < 1) { logger.info("No root directory specified. Using working directory."); args = new String[1]; args[0] = "."; } Thread t = new RequestListenerThread(8088, args[0]); t.setDaemon(false); t.start(); } static class HttpFileHandler implements HttpRequestHandler { private final String docRoot; public HttpFileHandler(final String docRoot) { super(); this.docRoot = docRoot; } public void handle(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(); if (request instanceof HttpEntityEnclosingRequest && target.equals("/service")) { HttpEntity entity = ((HttpEntityEnclosingRequest) request).getEntity(); byte[] entityContent = EntityUtils.toByteArray(entity); logger.debug("Incoming content: " + new String(entityContent)); final String output = this.thriftRequest(entityContent); logger.debug("Outgoing content: " + output); EntityTemplate body = new EntityTemplate(new ContentProducer() { public void writeTo(final OutputStream outstream) throws IOException { OutputStreamWriter writer = new OutputStreamWriter(outstream, "UTF-8"); writer.write(output); writer.flush(); } }); body.setContentType("text/html; charset=UTF-8"); response.setEntity(body); } else { if (target.indexOf("?") != -1) { target = target.substring(1, target.indexOf("?")); } final File file = new File(this.docRoot, URLDecoder.decode(target, "UTF-8")); if (!file.exists()) { response.setStatusCode(HttpStatus.SC_NOT_FOUND); EntityTemplate body = new EntityTemplate(new ContentProducer() { public void writeTo(final OutputStream outstream) throws IOException { OutputStreamWriter writer = new OutputStreamWriter(outstream, "UTF-8"); writer.write("<html><body><h1>"); writer.write("File "); writer.write(file.getPath()); writer.write(" not found"); writer.write("</h1></body></html>"); writer.flush(); } }); body.setContentType("text/html; charset=UTF-8"); response.setEntity(body); logger.warn("File " + file.getPath() + " not found"); } else if (!file.canRead() || file.isDirectory()) { response.setStatusCode(HttpStatus.SC_FORBIDDEN); EntityTemplate body = new EntityTemplate(new ContentProducer() { public void writeTo(final OutputStream outstream) throws IOException { OutputStreamWriter writer = new OutputStreamWriter(outstream, "UTF-8"); writer.write("<html><body><h1>"); writer.write("Access denied"); writer.write("</h1></body></html>"); writer.flush(); } }); body.setContentType("text/html; charset=UTF-8"); response.setEntity(body); logger.warn("Cannot read file " + file.getPath()); } else { String mimeType = "application/octet-stream"; MimeUtil2 mimeUtil = new MimeUtil2(); synchronized (this) { mimeUtil.registerMimeDetector(ExtensionMimeDetector.class.getName()); } Collection<MimeType> collection = mimeUtil.getMimeTypes(file); Iterator<MimeType> iterator = collection.iterator(); while (iterator.hasNext()) { MimeType mt = iterator.next(); mimeType = mt.getMediaType() + "/" + mt.getSubType(); break; } response.setStatusCode(HttpStatus.SC_OK); FileEntity body = new FileEntity(file, mimeType); response.addHeader("Content-Type", mimeType); response.setEntity(body); logger.debug("Serving file " + file.getPath()); } } } private String thriftRequest(byte[] input) { try { //Input TMemoryBuffer inbuffer = new TMemoryBuffer(input.length); inbuffer.write(input); TProtocol inprotocol = new TJSONProtocol(inbuffer); //Output TMemoryBuffer outbuffer = new TMemoryBuffer(100); TProtocol outprotocol = new TJSONProtocol(outbuffer); Iface handler = new CalculatorHandler(); TProcessor processor = new Calculator.Processor<Iface>(handler); processor.process(inprotocol, outprotocol); byte[] output = new byte[outbuffer.length()]; outbuffer.readAll(output, 0, output.length); return new String(output, "UTF-8"); } catch (Throwable t) { return "Error:" + t.getMessage(); } } } static class RequestListenerThread extends Thread { private final ServerSocket httpServerSocket; private final ServerSocket rawServerSocket; private final HttpParams params; private final HttpService httpService; public RequestListenerThread(int port, final String docroot) throws IOException { this.httpServerSocket = new ServerSocket(port); this.rawServerSocket = new ServerSocket(port + 1); this.params = new BasicHttpParams(); this.params.setIntParameter(CoreConnectionPNames.SO_TIMEOUT, 1000) .setIntParameter(CoreConnectionPNames.SOCKET_BUFFER_SIZE, 8 * 1024) .setBooleanParameter(CoreConnectionPNames.STALE_CONNECTION_CHECK, false) .setBooleanParameter(CoreConnectionPNames.TCP_NODELAY, true) .setParameter(CoreProtocolPNames.ORIGIN_SERVER, "HttpComponents/1.1"); // Set up the HTTP protocol processor HttpProcessor httpproc = new BasicHttpProcessor(); // Set up request handlers HttpRequestHandlerRegistry reqistry = new HttpRequestHandlerRegistry(); reqistry.register("*", new HttpFileHandler(docroot)); // Set up the HTTP service this.httpService = new HttpService(httpproc, new NoConnectionReuseStrategy(), new DefaultHttpResponseFactory()); this.httpService.setParams(this.params); this.httpService.setHandlerResolver(reqistry); } public void run() { logger.info("HTTP listening on port " + this.httpServerSocket.getLocalPort()); logger.debug("Point your browser to http://localhost:8088/index.html"); new Thread(new Runnable() { @Override public void run() { try { int port = httpServerSocket.getLocalPort() + 10; TServerTransport serverTransport = new TServerSocket(port); Iface handler = new CalculatorHandler(); TProcessor processor = new Calculator.Processor<Iface>(handler); Args args = new Args(serverTransport).processor(processor) .inputProtocolFactory(new TJSONProtocol.Factory()) .outputProtocolFactory(new TJSONProtocol.Factory()); TServer server = new TSimpleServer(args); // Use this for a multithreaded server // TServer server = new TThreadPoolServer(new TThreadPoolServer.Args(serverTransport).processor(processor)); logger.info("Raw listening on port " + port); server.serve(); } catch (Exception e) { e.printStackTrace(); } } } ).start(); // new Thread(new Runnable() { // // @Override // public void run() { // while (!Thread.interrupted()) { // try { // // Set up HTTP connection // Socket socket = rawServerSocket.accept(); // ServerSocket conn = new ServerSocket() // DefaultHttpServerConnection conn = new DefaultHttpServerConnection(); // logger.debug("Incoming connection from " + socket.getInetAddress()); // HttpParams params = new ; // conn.bind(socket, params); // // // Start worker thread // Thread t = new RawWorkerThread(this.httpService, conn); // t.setDaemon(true); // t.start(); // } catch (InterruptedIOException ex) { // break; // } catch (IOException e) { // logger.error("I/O error initialising connection thread: " + e.getMessage()); // break; // } // } // // } // }).start(); while (!Thread.interrupted()) { try { // Set up HTTP connection Socket socket = this.httpServerSocket.accept(); DefaultHttpServerConnection conn = new DefaultHttpServerConnection(); logger.debug("Incoming connection from " + socket.getInetAddress()); conn.bind(socket, this.params); // Start worker thread Thread t = new HttpWorkerThread(this.httpService, conn); t.setDaemon(true); t.start(); } catch (InterruptedIOException ex) { break; } catch (IOException e) { logger.error("I/O error initialising connection thread: " + e.getMessage()); break; } } } } static class HttpWorkerThread extends Thread { private final HttpService httpservice; private final HttpServerConnection conn; public HttpWorkerThread(final HttpService httpservice, final HttpServerConnection conn) { super(); this.httpservice = httpservice; this.conn = conn; } public void run() { logger.debug("New HTTP connection thread"); HttpContext context = new BasicHttpContext(null); try { while (!Thread.interrupted() && this.conn.isOpen()) { this.httpservice.handleRequest(this.conn, context); } } catch (ConnectionClosedException ex) { logger.debug("Client closed connection"); } catch (IOException ex) { logger.debug("I/O error: " + ex.getMessage()); } catch (HttpException ex) { logger.error("Unrecoverable HTTP protocol violation: " + ex.getMessage()); } finally { try { this.conn.shutdown(); } catch (IOException ignore) { } } } } }