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// 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.
import java.io.*;
import java.net.*;
import java.util.*;
class ProtocolServer extends Thread
{
protected ServerSocket listener = null;
protected static ProtocolServer instance = null;
public ProtocolServer (int port)
{
try
{
listener = new ServerSocket(port);
}
catch(IOException ioe)
{
ioe.printStackTrace();
}
}
public synchronized void run ()
{
while (true)
{
try
{
Socket socket = listener.accept();
new ProtocolRequestHandler(socket).start();
}
catch (IOException ioe)
{
ioe.printStackTrace();
}
}
}
public static ProtocolServer getInstance (int port)
{
if (instance == null)
{
instance = new ProtocolServer (port);
}
return instance;
}
}// end of class ProtocolServer
class ProtocolRequestHandler extends Thread
{
protected Socket socket = null;
protected String requestBody;
// constructor
public ProtocolRequestHandler (Socket socket)
{
this.socket = socket;
}
public synchronized void run ()
{
try
{
// unmarshal the request
System.out.println ("call unmarshalRequest");
requestBody = unmarshalRequest();
// marshal the response
System.out.println ("call marshalResponse");
byte[] response = marshalResponse (requestBody);
// send the response
if (response != null)
{
BufferedOutputStream responseStream =
new BufferedOutputStream(socket.getOutputStream());
responseStream.write (response);
responseStream.flush ();
}
// close the socket
System.out.println("close socket");
socket.close ();
}
catch (Exception e)
{
e.printStackTrace();
try
{
socket.close ();
}
catch (Exception socke)
{
socke.printStackTrace();
}
}
}
protected String unmarshalRequest() throws Exception
{
BufferedReader requestReader =
new BufferedReader (new InputStreamReader(socket.getInputStream()));
String request = requestReader.readLine();
requestReader.readLine();
System.out.println ("request is " + request);
StringTokenizer tok = new StringTokenizer (request, " ");
String host = tok.nextToken();
String fileName = tok.nextToken();
return fileName;
}
protected byte[] marshalResponse(String requestBody) throws Exception
{
byte[] responseBody;
// find the file corresponding to the file name defined in requestBody
File responseFile = new File (requestBody);
if (responseFile.canRead())
{
FileInputStream responseFileStream =
new FileInputStream (responseFile);
// read data from the file.
int bytesRead = 0;
byte[] buffer = new byte[1024];
responseBody = new byte[0];
byte[] temp = new byte[0];
while ((bytesRead = responseFileStream.read (buffer)) != -1)
{
temp = responseBody;
responseBody = new byte[temp.length + bytesRead];
for (int i = 0; i < temp.length; i++)
responseBody[i] = temp[i];
for (int i = 0; i < bytesRead; i++)
responseBody[temp.length + i] = buffer[i];
}
}
else
{
//String errorMessage = new String ("Error reading " + requestBody);
//responseBody = new byte[1024];
//responseBody = errorMessage.getBytes();
return null;
}
System.out.println (new String(responseBody));
return responseBody;
}
}// end of class ProtocolRequestHandler
public class ProtocolServerTest
{
public static void main(String[] args)
{
int port = 8175;
if(args.length > 0)
port = Integer.parseInt(args[0]);
// Call networkClient and make connection to server through socket.
ProtocolServer protocolServer = ProtocolServer.getInstance (port);
protocolServer.start();
}
}// End of class
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