001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019 020 package javax.activation; 021 022 import java.io.File; 023 import java.io.IOException; 024 import java.io.InputStream; 025 import java.io.BufferedReader; 026 import java.io.InputStreamReader; 027 import java.io.FileReader; 028 import java.io.FileInputStream; 029 import java.io.FileNotFoundException; 030 import java.util.Map; 031 import java.util.HashMap; 032 import java.util.StringTokenizer; 033 import java.util.Enumeration; 034 import java.net.URL; 035 036 /** 037 * @version $Rev: 467553 $ $Date: 2006-10-25 06:01:51 +0200 (Mi, 25. Okt 2006) $ 038 */ 039 public class MimetypesFileTypeMap extends FileTypeMap { 040 private static final String DEFAULT_TYPE = "application/octet-stream"; 041 042 private final Map types = new HashMap(); 043 044 public MimetypesFileTypeMap() { 045 // defaults from /META-INF/mimetypes.default 046 try { 047 InputStream is = MimetypesFileTypeMap.class.getResourceAsStream("/META-INF/mimetypes.default"); 048 if (is != null) { 049 try { 050 loadStream(is); 051 } finally { 052 is.close(); 053 } 054 } 055 } catch (IOException e) { 056 // ignore 057 } 058 059 // defaults from resources called /META-INF/mime.types 060 try { 061 ClassLoader cl = MimetypesFileTypeMap.class.getClassLoader(); 062 Enumeration e = cl.getResources("/META-INF/mime.types"); 063 while (e.hasMoreElements()) { 064 URL url = (URL) e.nextElement(); 065 try { 066 InputStream is = url.openStream(); 067 try { 068 loadStream(is); 069 } finally { 070 is.close(); 071 } 072 } catch (IOException e1) { 073 continue; 074 } 075 } 076 } catch (SecurityException e) { 077 // ignore 078 } catch (IOException e) { 079 // ignore 080 } 081 082 // defaults from ${java.home}/lib/mime.types 083 try { 084 File file = new File(System.getProperty("java.home"), "lib/mime.types"); 085 InputStream is = new FileInputStream(file); 086 try { 087 loadStream(is); 088 } finally { 089 is.close(); 090 } 091 } catch (SecurityException e) { 092 // ignore 093 } catch (FileNotFoundException e) { 094 // ignore 095 } catch (IOException e) { 096 // ignore 097 } 098 099 // defaults from ${user.home}/.mime.types 100 try { 101 File file = new File(System.getProperty("user.home"), ".mime.types"); 102 InputStream is = new FileInputStream(file); 103 try { 104 loadStream(is); 105 } finally { 106 is.close(); 107 } 108 } catch (SecurityException e) { 109 // ignore 110 } catch (FileNotFoundException e) { 111 // ignore 112 } catch (IOException e) { 113 // ignore 114 } 115 } 116 117 public MimetypesFileTypeMap(String mimeTypeFileName) throws IOException { 118 this(); 119 BufferedReader reader = new BufferedReader(new FileReader(mimeTypeFileName)); 120 try { 121 String line; 122 while ((line = reader.readLine()) != null) { 123 addMimeTypes(line); 124 } 125 reader.close(); 126 } catch (IOException e) { 127 try { 128 reader.close(); 129 } catch (IOException e1) { 130 // ignore to allow original cause through 131 } 132 throw e; 133 } 134 } 135 136 public MimetypesFileTypeMap(InputStream is) { 137 this(); 138 try { 139 loadStream(is); 140 } catch (IOException e) { 141 // ignore as the spec's signature says we can't throw IOException - doh! 142 } 143 } 144 145 private void loadStream(InputStream is) throws IOException { 146 BufferedReader reader = new BufferedReader(new InputStreamReader(is)); 147 String line; 148 while ((line = reader.readLine()) != null) { 149 addMimeTypes(line); 150 } 151 } 152 153 public synchronized void addMimeTypes(String mime_types) { 154 int hashPos = mime_types.indexOf('#'); 155 if (hashPos != -1) { 156 mime_types = mime_types.substring(0, hashPos); 157 } 158 StringTokenizer tok = new StringTokenizer(mime_types); 159 if (!tok.hasMoreTokens()) { 160 return; 161 } 162 String contentType = tok.nextToken(); 163 while (tok.hasMoreTokens()) { 164 String fileType = tok.nextToken(); 165 types.put(fileType, contentType); 166 } 167 } 168 169 public String getContentType(File f) { 170 return getContentType(f.getName()); 171 } 172 173 public synchronized String getContentType(String filename) { 174 int index = filename.lastIndexOf('.'); 175 if (index == -1 || index == filename.length()-1) { 176 return DEFAULT_TYPE; 177 } 178 String fileType = filename.substring(index + 1); 179 String contentType = (String) types.get(fileType); 180 return contentType == null ? DEFAULT_TYPE : contentType; 181 } 182 }