1   /*
2    * $Header: /home/cvs/jakarta-commons/httpclient/src/test/org/apache/commons/httpclient/server/SimpleHttpServer.java,v 1.1.2.5 2004/02/22 18:21:18 olegk Exp $
3    * $Revision: 1.1.2.5 $
4    * $Date: 2004/02/22 18:21:18 $
5    *
6    * ====================================================================
7    *
8    *  Copyright 1999-2004 The Apache Software Foundation
9    *
10   *  Licensed under the Apache License, Version 2.0 (the "License");
11   *  you may not use this file except in compliance with the License.
12   *  You may obtain a copy of the License at
13   *
14   *      http://www.apache.org/licenses/LICENSE-2.0
15   *
16   *  Unless required by applicable law or agreed to in writing, software
17   *  distributed under the License is distributed on an "AS IS" BASIS,
18   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19   *  See the License for the specific language governing permissions and
20   *  limitations under the License.
21   * ====================================================================
22   *
23   * This software consists of voluntary contributions made by many
24   * individuals on behalf of the Apache Software Foundation.  For more
25   * information on the Apache Software Foundation, please see
26   * <http://www.apache.org/>.
27   *
28   * [Additional notices, if required by prior licensing conditions]
29   *
30   */
31  
32  package org.apache.commons.httpclient.server;
33  
34  import java.io.IOException;
35  import java.net.ServerSocket;
36  import java.net.Socket;
37  import java.net.SocketException;
38  import java.util.HashSet;
39  import java.util.Iterator;
40  import java.util.Set;
41  
42  import org.apache.commons.httpclient.HttpStatus;
43  import org.apache.commons.logging.Log;
44  import org.apache.commons.logging.LogFactory;
45  
46  /***
47   * A simple, but extensible HTTP server, mostly for testing purposes.
48   * 
49   * @author Christian Kohlschuetter
50   */
51  public class SimpleHttpServer implements Runnable {
52      private static final Log LOG = LogFactory.getLog(SimpleHttpServer.class);
53      
54      private ServerSocket server = null;
55      private Thread t;
56      private ThreadGroup tg;
57      private boolean stopped = false;
58  
59      private Set connections = new HashSet();
60  
61      private HttpRequestHandler requestHandler = null;
62  
63      /***
64       * Creates a new HTTP server instance, using an arbitrary free TCP port
65       * 
66       * @throws IOException  if anything goes wrong during initialization
67       */
68      public SimpleHttpServer() throws IOException {
69          this(0);
70      }
71  
72      /***
73       * Creates a new HTTP server instance, using the specified TCP port
74       * 
75       * @param   port    Desired TCP port
76       * @throws IOException  if anything goes wrong during initialization
77       */
78      public SimpleHttpServer(int port) throws IOException {
79          server = new ServerSocket(port);
80          if(LOG.isInfoEnabled()) {
81              LOG.info("New SimpleHttpServer on port " + getLocalPort());
82          }
83          tg = new ThreadGroup("SimpleHttpServer group");
84          t = new Thread(tg, this, "SimpleHttpServer connection handler");
85          t.setDaemon(true);
86          t.start();
87      }
88  
89      /***
90       * Returns the TCP port that this HTTP server instance is bound to.
91       *
92       * @return  TCP port, or -1 if not running
93       */
94      public int getLocalPort() {
95          return server.getLocalPort();
96      }
97      
98      /***
99       * Returns the IP address that this HTTP server instance is bound to.
100      * @return String representation of the IP address or <code>null</code> if not running
101      */
102     public String getLocalAddress() {
103     	return server.getInetAddress().getHostAddress();
104     }
105 
106     /***
107      * Checks if this HTTP server instance is running.
108      * 
109      * @return  true/false
110      */
111     public boolean isRunning() {
112         if(t == null) {
113             return false;
114         }
115         return t.isAlive();
116     }
117 
118     /***
119      * Stops this HTTP server instance.
120      */
121     public void destroy() {
122         if (stopped) {
123             return;
124         }
125 
126         stopped = true;
127         if(LOG.isInfoEnabled()) {
128             LOG.info("Stopping SimpleHttpServer on port " + getLocalPort());
129         }
130 
131         tg.interrupt();
132 
133         if (server != null) {
134             try {
135                 server.close();
136             } catch(IOException e) {
137                 
138             }
139         }
140 
141         for (Iterator it = connections.iterator(); it.hasNext();) {
142             SimpleHttpServerConnection conn =
143                 (SimpleHttpServerConnection) it.next();
144             conn.destroy();
145         }
146     }
147 
148     /***
149      * Returns the currently used HttpRequestHandler by this SimpleHttpServer
150      * 
151      * @return The used HttpRequestHandler, or null.
152      */
153     public HttpRequestHandler getRequestHandler() {
154         return requestHandler;
155     }
156 
157     /***
158      * Sets the HttpRequestHandler to be used for this SimpleHttpServer.
159      * 
160      * @param rh    Request handler to be used, or null to disable.
161      */
162     public void setRequestHandler(HttpRequestHandler rh) {
163         requestHandler = rh;
164     }
165 
166     public void removeConnection(SimpleHttpServerConnection conn) {
167         connections.remove(conn);
168     }
169 
170     public void processRequest(SimpleHttpServerConnection conn)
171         throws IOException {
172 
173     	boolean complete = false;
174         if (requestHandler != null) {
175             complete = requestHandler.processRequest(conn);
176         }
177         if (!complete) {
178             conn.connectionClose();
179             ErrorResponse.getInstance().getResponse(HttpStatus.SC_SERVICE_UNAVAILABLE).processRequest(conn);
180         }
181     }
182 
183     public void run() {
184         try {
185             while (!Thread.interrupted()) {
186                 Socket socket = server.accept();
187                 try {
188 
189                     SimpleHttpServerConnection conn =
190                         new SimpleHttpServerConnection(this, socket);
191 
192                     connections.add(conn);
193 
194                     Thread t =
195                         new Thread(tg, conn, "SimpleHttpServer connection");
196                     t.setDaemon(true);
197                     t.start();
198                 } catch (IOException e) {
199                     LOG.error("SimpleHttpServer error", e);
200                     throw new RuntimeException(e.getMessage());
201                 }
202                 Thread.sleep(100);
203             }
204         } catch (InterruptedException accept) {
205         } catch (SocketException e) {
206             if (!stopped) {
207                 LOG.error("SimpleHttpServer error", e);
208                 throw new RuntimeException(e.getMessage());
209             }
210         } catch (IOException e) {
211             LOG.error("SimpleHttpServer error", e);
212             throw new RuntimeException(e.getMessage());
213         } finally {
214             destroy();
215         }
216     }
217 }