Here's the source:

/*
 * $HeadURL$
 * $Revision$
 * $Date$
 *
 * ====================================================================
 * 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 usaproxytest;

import java.io.File;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.URL;
import java.net.URLDecoder;
import java.util.Locale;

import org.apache.http.ConnectionClosedException;
import org.apache.http.ConnectionReuseStrategy;
import org.apache.http.HttpEntity;
import org.apache.http.HttpEntityEnclosingRequest;
import org.apache.http.HttpException;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.HttpServerConnection;
import org.apache.http.HttpStatus;
import org.apache.http.HttpVersion;
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.DefaultConnectionReuseStrategy;
import org.apache.http.impl.DefaultHttpClientConnection;
import org.apache.http.impl.DefaultHttpResponseFactory;
import org.apache.http.impl.DefaultHttpServerConnection;
import org.apache.http.impl.nio.DefaultServerIOEventDispatch;
import org.apache.http.impl.nio.reactor.DefaultListeningIOReactor;
import org.apache.http.nio.NHttpConnection;
import org.apache.http.nio.entity.NFileEntity;
import org.apache.http.nio.entity.NStringEntity;
import org.apache.http.nio.protocol.BufferingHttpServiceHandler;
import org.apache.http.nio.protocol.EventListener;
import org.apache.http.nio.reactor.IOEventDispatch;
import org.apache.http.nio.reactor.ListeningIOReactor;
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.params.HttpProtocolParams;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.BasicHttpProcessor;
import org.apache.http.protocol.ExecutionContext;
import org.apache.http.protocol.HttpContext;
import org.apache.http.protocol.HttpRequestExecutor;
import org.apache.http.protocol.HttpRequestHandler;
import org.apache.http.protocol.HttpRequestHandlerRegistry;
import org.apache.http.protocol.HttpService;
import org.apache.http.protocol.RequestConnControl;
import org.apache.http.protocol.RequestContent;
import org.apache.http.protocol.RequestExpectContinue;
import org.apache.http.protocol.RequestTargetHost;
import org.apache.http.protocol.RequestUserAgent;
import org.apache.http.protocol.ResponseConnControl;
import org.apache.http.protocol.ResponseContent;
import org.apache.http.protocol.ResponseDate;
import org.apache.http.protocol.ResponseServer;
import org.apache.http.util.EntityUtils;

public class NHttpServer {

         public static void main(String[] args) throws Exception {
                
                Thread t = new RequestListenerThread(8080, null);
                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();

                        System.out.println("handling request for: " + target);
                    
                    
                    if (request instanceof HttpEntityEnclosingRequest) {
                        HttpEntity entity = ((HttpEntityEnclosingRequest)
request).getEntity();
                        byte[] entityContent = EntityUtils.toByteArray(entity);
                        System.out.println("Incoming entity content (bytes)    
: "
+ entityContent.length);
                        System.out.println("repeatable: "  +
entity.isRepeatable());
                    }
                    
                    // added by CP 
                    HttpParams params = new BasicHttpParams();
                    HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
                    HttpProtocolParams.setContentCharset(params, "UTF-8");
                    HttpProtocolParams.setUserAgent(params, 
"HttpComponents/1.1");
                    HttpProtocolParams.setUseExpectContinue(params, true);
                    
                    BasicHttpProcessor httpproc = new BasicHttpProcessor();
                    // Required protocol interceptors
                    httpproc.addInterceptor(new RequestContent());
                    httpproc.addInterceptor(new RequestTargetHost());
                    // Recommended protocol interceptors
                    httpproc.addInterceptor(new RequestConnControl());
                    httpproc.addInterceptor(new RequestUserAgent());
                    httpproc.addInterceptor(new RequestExpectContinue());

            
                    HttpRequestExecutor httpexecutor = new 
HttpRequestExecutor();

                    HttpContext httpContext = new BasicHttpContext(null);
                    
                    URL targetUrl = new URL(target);
                    int port = targetUrl.getPort() != -1 ? targetUrl.getPort() :
targetUrl.getDefaultPort();
                    
                    
                    HttpHost host = new HttpHost(targetUrl.getHost(), port);
                    
                    DefaultHttpClientConnection conn = new
DefaultHttpClientConnection();
                    
                    context.setAttribute(ExecutionContext.HTTP_CONNECTION, 
conn);
                    context.setAttribute(ExecutionContext.HTTP_TARGET_HOST, 
host);

                    if (!conn.isOpen()) {
                    Socket socket = new Socket(host.getHostName(),
host.getPort());
                    conn.bind(socket, params);

                }

                    
                    System.out.println(">> Request URI: " +
request.getRequestLine().getUri());

                context.setAttribute(ExecutionContext.HTTP_REQUEST,
request);
                
                HttpResponse httpResponse = httpexecutor.execute(request,
conn, context);
                
                response.setParams(params);

                httpexecutor.postProcess(httpResponse, httpproc, context);
                response.setStatusLine(httpResponse.getStatusLine());
                response.setEntity(httpResponse.getEntity());
                conn.close();
                                
                    // end of added by CP
                        
                }
                
            }
            
            static class RequestListenerThread extends Thread {

                private final ServerSocket serversocket;
                private final HttpParams params; 
                private final HttpService httpService;
                
                public RequestListenerThread(int port, final String docroot) 
throws
IOException {
                    this.serversocket = new ServerSocket(port);
                    this.params = new BasicHttpParams();
                    this.params
                        .setIntParameter(CoreConnectionPNames.SO_TIMEOUT, 5000)
                        
.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
                    BasicHttpProcessor httpproc = new BasicHttpProcessor();
                    httpproc.addInterceptor(new ResponseDate());
                    httpproc.addInterceptor(new ResponseServer());
                    httpproc.addInterceptor(new ResponseContent());
                    httpproc.addInterceptor(new ResponseConnControl());
                    
                    // Set up request handlers
                    HttpRequestHandlerRegistry reqistry = new
HttpRequestHandlerRegistry();
                    reqistry.register("*", new HttpFileHandler(docroot));
                    
                    // Set up the HTTP service
                    this.httpService = new HttpService(
                            httpproc, 
                            new DefaultConnectionReuseStrategy(), 
                            new DefaultHttpResponseFactory());
                    this.httpService.setParams(this.params);
                    this.httpService.setHandlerResolver(reqistry);
                }
                
                public void run() {
                    System.out.println("Listening on port " +
this.serversocket.getLocalPort());
                    while (!Thread.interrupted()) {
                        try {
                            // Set up HTTP connection
                            Socket socket = this.serversocket.accept();
                            DefaultHttpServerConnection conn = new
DefaultHttpServerConnection();
                            System.out.println("Incoming connection from " +
socket.getInetAddress());
                            conn.bind(socket, this.params);

                            // Start worker thread
                            Thread t = new WorkerThread(this.httpService, conn);
                            t.setDaemon(true);
                            t.start();
                        } catch (InterruptedIOException ex) {
                            break;
                        } catch (IOException e) {
                            System.err.println("I/O error initialising 
connection
thread: " 
                                    + e.getMessage());
                            break;
                        }
                    }
                }
            }
            
            static class WorkerThread extends Thread {

                private final HttpService httpservice;
                private final HttpServerConnection conn;
                
                public WorkerThread(
                        final HttpService httpservice, 
                        final HttpServerConnection conn) {
                    super();
                    this.httpservice = httpservice;
                    this.conn = conn;
                }
                
                public void run() {
                    System.out.println("New connection thread");
                    HttpContext context = new BasicHttpContext(null);
                    try {
                        while (!Thread.interrupted() && this.conn.isOpen()) {
                            this.httpservice.handleRequest(this.conn, context);
                        }
                    } catch (ConnectionClosedException ex) {
                        System.err.println("Client closed connection");
                    } catch (IOException ex) {
                        System.err.println("I/O error: " + ex.getMessage());
                    } catch (HttpException ex) {
                        System.err.println("Unrecoverable HTTP protocol 
violation:
" + ex.getMessage());
                    } finally {
                        try {
                            this.conn.shutdown();
                        } catch (IOException ignore) {}
                    }
                }

            }


}






Chris Lowe wrote:
> 
> I don't think attachments come though on this list. 
> 

-- 
View this message in context: 
http://www.nabble.com/Question-about-creating-a-simple-HTTP-proxy-tp20703487p20704331.html
Sent from the HttpClient-User mailing list archive at Nabble.com.


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