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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.
*/
package org.apache.tuscany.sca.host.http;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLDecoder;
import javax.servlet.Servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* A minimal implementation of a Servlet that serves documents in a document root
* directory.
*
* A Servlet host implementation is not required to use this implementation and can map
* the URI and document root to a more complete and more efficient implementation of
* a resource Servlet, for example the Tomcat or Jetty default Servlets.
*
* @version $Rev$ $Date$
*/
public class DefaultResourceServlet extends HttpServlet implements Servlet {
private static final long serialVersionUID = 2865466417329430610L;
private String documentRoot;
/**
* Constructs a new ResourceServlet
* @param documentRoot the document root
*/
public DefaultResourceServlet(String documentRoot) {
this.documentRoot = documentRoot;
}
/**
* Returns the document root.
* @return the document root
*/
public String getDocumentRoot() {
return documentRoot;
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// Determine the resource path
String path = URLDecoder.decode(request.getRequestURI().substring(request.getServletPath().length()), "UTF-8");
if (path.startsWith("/")) {
path = path.substring(1);
}
URL url = new URL(documentRoot + '/' + path);
// Write the resource
InputStream is = url.openStream();
OutputStream os = response.getOutputStream();
byte[] buffer = new byte[2048];
for (;;) {
int n = is.read(buffer);
if (n <= 0)
break;
os.write(buffer, 0, n);
}
}
}
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