Jetty example source code file (MimeTypes.java)

This example Jetty source code file (MimeTypes.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Jetty tags/keywords

buffer, buffer, cachedbuffer, cachedbuffer, hashmap, map, map, string, string, text_html_utf_8_buffer, text_plain_utf_8_buffer, text_xml_8859_1_buffer, text_xml_utf_8_buffer, utf8, util

The Jetty MimeTypes.java source code

// ========================================================================
// 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.mortbay.jetty;

import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

import org.mortbay.io.Buffer;
import org.mortbay.io.BufferCache;
import org.mortbay.io.BufferCache.CachedBuffer;
import org.mortbay.log.Log;
import org.mortbay.util.StringUtil;


/* ------------------------------------------------------------ */
/** 
 * @author Greg Wilkins
 */
public class MimeTypes
{
    public final static String
      FORM_ENCODED="application/x-www-form-urlencoded",
      MESSAGE_HTTP="message/http",
      MULTIPART_BYTERANGES="multipart/byteranges",
      TEXT_HTML="text/html",
      TEXT_PLAIN="text/plain",
      TEXT_XML="text/xml",
      TEXT_HTML_8859_1="text/html; charset=iso-8859-1",
      TEXT_PLAIN_8859_1="text/plain; charset=iso-8859-1",
      TEXT_XML_8859_1="text/xml; charset=iso-8859-1",
      TEXT_HTML_UTF_8="text/html; charset=utf-8",
      TEXT_PLAIN_UTF_8="text/plain; charset=utf-8",
      TEXT_XML_UTF_8="text/xml; charset=utf-8";
    

    private final static int
	FORM_ENCODED_ORDINAL=1,
    	MESSAGE_HTTP_ORDINAL=2,
    	MULTIPART_BYTERANGES_ORDINAL=3,
    	TEXT_HTML_ORDINAL=4,
	TEXT_PLAIN_ORDINAL=5,
	TEXT_XML_ORDINAL=6,
        TEXT_HTML_8859_1_ORDINAL=7,
        TEXT_PLAIN_8859_1_ORDINAL=8,
        TEXT_XML_8859_1_ORDINAL=9,
        TEXT_HTML_UTF_8_ORDINAL=10,
        TEXT_PLAIN_UTF_8_ORDINAL=11,
        TEXT_XML_UTF_8_ORDINAL=12;
    
    private static int __index=13;
    
    public final static BufferCache CACHE = new BufferCache(); 

    public final static CachedBuffer
    	FORM_ENCODED_BUFFER=CACHE.add(FORM_ENCODED,FORM_ENCODED_ORDINAL),
    	MESSAGE_HTTP_BUFFER=CACHE.add(MESSAGE_HTTP, MESSAGE_HTTP_ORDINAL),
    	MULTIPART_BYTERANGES_BUFFER=CACHE.add(MULTIPART_BYTERANGES,MULTIPART_BYTERANGES_ORDINAL),
        
        TEXT_HTML_BUFFER=CACHE.add(TEXT_HTML,TEXT_HTML_ORDINAL),
        TEXT_PLAIN_BUFFER=CACHE.add(TEXT_PLAIN,TEXT_PLAIN_ORDINAL),
        TEXT_XML_BUFFER=CACHE.add(TEXT_XML,TEXT_XML_ORDINAL),
        
    	TEXT_HTML_8859_1_BUFFER=new CachedBuffer(TEXT_HTML_8859_1,TEXT_HTML_8859_1_ORDINAL),
    	TEXT_PLAIN_8859_1_BUFFER=new CachedBuffer(TEXT_PLAIN_8859_1,TEXT_PLAIN_8859_1_ORDINAL),
    	TEXT_XML_8859_1_BUFFER=new CachedBuffer(TEXT_XML_8859_1,TEXT_XML_8859_1_ORDINAL),
        TEXT_HTML_UTF_8_BUFFER=new CachedBuffer(TEXT_HTML_UTF_8,TEXT_HTML_UTF_8_ORDINAL),
        TEXT_PLAIN_UTF_8_BUFFER=new CachedBuffer(TEXT_PLAIN_UTF_8,TEXT_PLAIN_UTF_8_ORDINAL),
        TEXT_XML_UTF_8_BUFFER=new CachedBuffer(TEXT_XML_UTF_8,TEXT_XML_UTF_8_ORDINAL);
    
    
    /* ------------------------------------------------------------ */
    /* ------------------------------------------------------------ */
    private final static Map __dftMimeMap = new HashMap();
    private final static Map __encodings = new HashMap();
    static
    {
        try
        {
            ResourceBundle mime = ResourceBundle.getBundle("org/mortbay/jetty/mime");
            Enumeration i = mime.getKeys();
            while(i.hasMoreElements())
            {
                String ext = (String)i.nextElement();
                String m = mime.getString(ext);
                __dftMimeMap.put(StringUtil.asciiToLowerCase(ext),normalizeMimeType(m));
            }
        }
        catch(MissingResourceException e)
        {
            Log.warn(e.toString());
            Log.debug(e);
        }

        try
        {
            ResourceBundle encoding = ResourceBundle.getBundle("org/mortbay/jetty/encoding");
            Enumeration i = encoding.getKeys();
            while(i.hasMoreElements())
            {
                Buffer type = normalizeMimeType((String)i.nextElement());
                __encodings.put(type,encoding.getString(type.toString()));
            }
        }
        catch(MissingResourceException e)
        {
            Log.warn(e.toString());
            Log.debug(e);
        }

        
        TEXT_HTML_BUFFER.setAssociate("ISO-8859-1",TEXT_HTML_8859_1_BUFFER);
        TEXT_HTML_BUFFER.setAssociate("ISO_8859_1",TEXT_HTML_8859_1_BUFFER);
        TEXT_HTML_BUFFER.setAssociate("iso-8859-1",TEXT_HTML_8859_1_BUFFER);
        TEXT_PLAIN_BUFFER.setAssociate("ISO-8859-1",TEXT_PLAIN_8859_1_BUFFER);
        TEXT_PLAIN_BUFFER.setAssociate("ISO_8859_1",TEXT_PLAIN_8859_1_BUFFER);
        TEXT_PLAIN_BUFFER.setAssociate("iso-8859-1",TEXT_PLAIN_8859_1_BUFFER);
        TEXT_XML_BUFFER.setAssociate("ISO-8859-1",TEXT_XML_8859_1_BUFFER);
        TEXT_XML_BUFFER.setAssociate("ISO_8859_1",TEXT_XML_8859_1_BUFFER);
        TEXT_XML_BUFFER.setAssociate("iso-8859-1",TEXT_XML_8859_1_BUFFER);

        TEXT_HTML_BUFFER.setAssociate("UTF-8",TEXT_HTML_UTF_8_BUFFER);
        TEXT_HTML_BUFFER.setAssociate("UTF8",TEXT_HTML_UTF_8_BUFFER);
        TEXT_HTML_BUFFER.setAssociate("utf8",TEXT_HTML_UTF_8_BUFFER);
        TEXT_HTML_BUFFER.setAssociate("utf-8",TEXT_HTML_UTF_8_BUFFER);
        TEXT_PLAIN_BUFFER.setAssociate("UTF-8",TEXT_PLAIN_UTF_8_BUFFER);
        TEXT_PLAIN_BUFFER.setAssociate("UTF8",TEXT_PLAIN_UTF_8_BUFFER);
        TEXT_PLAIN_BUFFER.setAssociate("utf-8",TEXT_PLAIN_UTF_8_BUFFER);
        TEXT_XML_BUFFER.setAssociate("UTF-8",TEXT_XML_UTF_8_BUFFER);
        TEXT_XML_BUFFER.setAssociate("utf8",TEXT_XML_UTF_8_BUFFER);
        TEXT_XML_BUFFER.setAssociate("UTF8",TEXT_XML_UTF_8_BUFFER);
        TEXT_XML_BUFFER.setAssociate("utf-8",TEXT_XML_UTF_8_BUFFER);
    }


    /* ------------------------------------------------------------ */
    private Map _mimeMap;
    
    /* ------------------------------------------------------------ */
    /** Constructor.
     */
    public MimeTypes()
    {
    }

    /* ------------------------------------------------------------ */
    public synchronized Map getMimeMap()
    {
        return _mimeMap;
    }

    /* ------------------------------------------------------------ */
    /**
     * @param mimeMap A Map of file extension to mime-type.
     */
    public void setMimeMap(Map mimeMap)
    {
        if (mimeMap==null)
        {
            _mimeMap=null;
            return;
        }
        
        Map m=new HashMap();
        Iterator i=mimeMap.entrySet().iterator();
        while (i.hasNext())
        {
            Map.Entry entry = (Map.Entry)i.next();
            m.put(entry.getKey(),normalizeMimeType(entry.getValue().toString()));
        }
        _mimeMap=m;
    }

    /* ------------------------------------------------------------ */
    /** Get the MIME type by filename extension.
     * @param filename A file name
     * @return MIME type matching the longest dot extension of the
     * file name.
     */
    public Buffer getMimeByExtension(String filename)
    {
        Buffer 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=StringUtil.asciiToLowerCase(filename.substring(i+1));
                if (_mimeMap!=null)
                    type = (Buffer)_mimeMap.get(ext);
                if (type==null)
                    type=(Buffer)__dftMimeMap.get(ext);
            }
        }

        if (type==null)
        {
            if (_mimeMap!=null)
                type=(Buffer)_mimeMap.get("*");
             if (type==null)
                 type=(Buffer)__dftMimeMap.get("*");
        }

        return type;
    }

    /* ------------------------------------------------------------ */
    /** Set a mime mapping
     * @param extension
     * @param type
     */
    public void addMimeMapping(String extension,String type)
    {
        if (_mimeMap==null)
            _mimeMap=new HashMap();
        
        _mimeMap.put(StringUtil.asciiToLowerCase(extension),normalizeMimeType(type));
    }

    /* ------------------------------------------------------------ */
    private static synchronized Buffer normalizeMimeType(String type)
    {
        Buffer b =CACHE.get(type);
        if (b==null)
            b=CACHE.add(type,__index++);
        return b;
    }

    /* ------------------------------------------------------------ */
    public static String getCharsetFromContentType(Buffer value)
    {
        if (value instanceof CachedBuffer)
        {
            switch(((CachedBuffer)value).getOrdinal())
            {
                case TEXT_HTML_8859_1_ORDINAL:
                case TEXT_PLAIN_8859_1_ORDINAL:
                case TEXT_XML_8859_1_ORDINAL:
                    return StringUtil.__ISO_8859_1;
                    
                case TEXT_HTML_UTF_8_ORDINAL:
                case TEXT_PLAIN_UTF_8_ORDINAL:
                case TEXT_XML_UTF_8_ORDINAL:
                    return StringUtil.__UTF8;
            }
        }
        
        int i=value.getIndex();
        int end=value.putIndex();
        int state=0;
        int start=0;
        boolean quote=false;
        for (;i<end;i++)
        {
            byte b = value.peek(i);
            
            if (quote && state!=10)
            {
                if ('"'==b)
                    quote=false;
                continue;
            }
                
            switch(state)
            {
                case 0:
                    if ('"'==b)
                    {
                        quote=true;
                        break;
                    }
                    if (';'==b)
                        state=1;
                    break;

                case 1: if ('c'==b) state=2; else if (' '!=b) state=0; break;
                case 2: if ('h'==b) state=3; else state=0;break;
                case 3: if ('a'==b) state=4; else state=0;break;
                case 4: if ('r'==b) state=5; else state=0;break;
                case 5: if ('s'==b) state=6; else state=0;break;
                case 6: if ('e'==b) state=7; else state=0;break;
                case 7: if ('t'==b) state=8; else state=0;break;

                case 8: if ('='==b) state=9; else if (' '!=b) state=0; break;
                
                case 9: 
                    if (' '==b) 
                        break;
                    if ('"'==b) 
                    {
                        quote=true;
                        start=i+1;
                        state=10;
                        break;
                    }
                    start=i;
                    state=10;
                    break;
                    
                case 10:
                    if (!quote && (';'==b || ' '==b )||
                        (quote && '"'==b ))
                        return CACHE.lookup(value.peek(start,i-start)).toString();
            }
        }    
        
        if (state==10)
            return CACHE.lookup(value.peek(start,i-start)).toString();
        return null;
        
    }


}