// ========================================================================
// Copyright 2000-2005 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// Licensed 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.klomp.snark.web;
import java.util.Enumeration;
import java.util.Locale;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.ResourceBundle;
import java.util.concurrent.ConcurrentHashMap;
/* ------------------------------------------------------------ */
/**
* Based on MimeTypes from Jetty 6.1.26, heavily simplified
* and modified to remove all dependencies on Jetty libs.
*
* Supports mime types only, not encodings.
* Does not support a default "*" mapping.
*
* This is only for local mappings.
* Caller should use getServletContext().getMimeType() if this returns null.
*
*
* ------------------------------------------------------------
*
* @author Greg Wilkins
*
* @since Jetty 7
*/
class MimeTypes
{
private final Map<String, String> _mimeMap;
public MimeTypes() {
_mimeMap = new ConcurrentHashMap<String, String>();
}
/* ------------------------------------------------------------ */
/**
* @param resourcePath A Map of file extension to mime-type.
*/
public void loadMimeMap(String resourcePath) {
loadMimeMap(_mimeMap, resourcePath);
}
/**
* Tries both webapp and system class loader, since Jetty blocks
* its classes from the webapp class loader.
*/
private static void loadMimeMap(Map<String, String> map, String resourcePath) {
try
{
ResourceBundle mime;
try {
mime = ResourceBundle.getBundle(resourcePath);
} catch(MissingResourceException e) {
// Jetty 7 webapp classloader blocks jetty classes
// http://wiki.eclipse.org/Jetty/Reference/Jetty_Classloading
//System.out.println("No mime types loaded from " + resourcePath + ", trying system classloader");
mime = ResourceBundle.getBundle(resourcePath, Locale.getDefault(), ClassLoader.getSystemClassLoader());
}
Enumeration<String> i = mime.getKeys();
while(i.hasMoreElements())
{
String ext = i.nextElement();
String m = mime.getString(ext);
map.put(ext.toLowerCase(Locale.US), m);
}
//System.out.println("Loaded " + map.size() + " mime types from " + resourcePath);
} catch(MissingResourceException e) {
//System.out.println("No mime types loaded from " + resourcePath);
}
}
/* ------------------------------------------------------------ */
/** Get the MIME type by filename extension.
*
* Returns ONLY local mappings.
* Caller should use getServletContext().getMimeType() if this returns null.
*
* @param filename A file name
* @return MIME type matching the longest dot extension of the
* file name.
*/
public String getMimeByExtension(String filename)
{
String type=null;
if (filename!=null)
{
int i=-1;
while(type==null)
{
i=filename.indexOf('.',i+1);
if (i<0 || i>=filename.length())
break;
String ext=filename.substring(i+1).toLowerCase(Locale.US);
type = _mimeMap.get(ext);
}
}
return type;
}
/* ------------------------------------------------------------ */
/** Set a mime mapping
* @param extension
* @param type
*/
public void addMimeMapping(String extension, String type)
{
_mimeMap.put(extension.toLowerCase(Locale.US), type);
}
}