/*
 * Copyright (c) 1994, 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package sun.net.www;
import java.io.*;
import java.net.FileNameMap;
import java.util.Hashtable;
import java.util.Enumeration;
import java.util.Properties;
import java.util.StringTokenizer;

public class MimeTable implements FileNameMap {
    
Keyed by content type, returns MimeEntries
/** Keyed by content type, returns MimeEntries */
private Hashtable<String, MimeEntry> entries = new Hashtable<String, MimeEntry>();
Keyed by file extension (with the .), returns MimeEntries
/** Keyed by file extension (with the .), returns MimeEntries */
private Hashtable<String, MimeEntry> extensionMap = new Hashtable<String, MimeEntry>(); // Will be reset if in the platform-specific data file private static String tempFileTemplate; static { java.security.AccessController.doPrivileged( new java.security.PrivilegedAction<Void>() { public Void run() { tempFileTemplate = System.getProperty("content.types.temp.file.template", "/tmp/%s"); mailcapLocations = new String[] { System.getProperty("user.mailcap"), System.getProperty("user.home") + "/.mailcap", "/etc/mailcap", "/usr/etc/mailcap", "/usr/local/etc/mailcap", System.getProperty("hotjava.home", "/usr/local/hotjava") + "/lib/mailcap", }; return null; } }); } private static final String filePreamble = "sun.net.www MIME content-types table"; private static final String fileMagic = "#" + filePreamble; MimeTable() { load(); } private static class DefaultInstanceHolder { static final MimeTable defaultInstance = getDefaultInstance(); static MimeTable getDefaultInstance() { return java.security.AccessController.doPrivileged( new java.security.PrivilegedAction<MimeTable>() { public MimeTable run() { MimeTable instance = new MimeTable(); URLConnection.setFileNameMap(instance); return instance; } }); } }
Get the single instance of this class. First use will load the table from a data file.
/** * Get the single instance of this class. First use will load the * table from a data file. */
public static MimeTable getDefaultTable() { return DefaultInstanceHolder.defaultInstance; } /** * */ public static FileNameMap loadTable() { MimeTable mt = getDefaultTable(); return (FileNameMap)mt; } public synchronized int getSize() { return entries.size(); } public synchronized String getContentTypeFor(String fileName) { MimeEntry entry = findByFileName(fileName); if (entry != null) { return entry.getType(); } else { return null; } } public synchronized void add(MimeEntry m) { entries.put(m.getType(), m); String exts[] = m.getExtensions(); if (exts == null) { return; } for (int i = 0; i < exts.length; i++) { extensionMap.put(exts[i], m); } } public synchronized MimeEntry remove(String type) { MimeEntry entry = entries.get(type); return remove(entry); } public synchronized MimeEntry remove(MimeEntry entry) { String[] extensionKeys = entry.getExtensions(); if (extensionKeys != null) { for (int i = 0; i < extensionKeys.length; i++) { extensionMap.remove(extensionKeys[i]); } } return entries.remove(entry.getType()); } public synchronized MimeEntry find(String type) { MimeEntry entry = entries.get(type); if (entry == null) { // try a wildcard lookup Enumeration<MimeEntry> e = entries.elements(); while (e.hasMoreElements()) { MimeEntry wild = e.nextElement(); if (wild.matches(type)) { return wild; } } } return entry; }
Locate a MimeEntry by the file extension that has been associated with it. Parses general file names, and URLs.
/** * Locate a MimeEntry by the file extension that has been associated * with it. Parses general file names, and URLs. */
public MimeEntry findByFileName(String fname) { String ext = ""; int i = fname.lastIndexOf('#'); if (i > 0) { fname = fname.substring(0, i - 1); } i = fname.lastIndexOf('.'); // REMIND: OS specific delimters appear here i = Math.max(i, fname.lastIndexOf('/')); i = Math.max(i, fname.lastIndexOf('?')); if (i != -1 && fname.charAt(i) == '.') { ext = fname.substring(i).toLowerCase(); } return findByExt(ext); }
Locate a MimeEntry by the file extension that has been associated with it.
/** * Locate a MimeEntry by the file extension that has been associated * with it. */
public synchronized MimeEntry findByExt(String fileExtension) { return extensionMap.get(fileExtension); } public synchronized MimeEntry findByDescription(String description) { Enumeration<MimeEntry> e = elements(); while (e.hasMoreElements()) { MimeEntry entry = e.nextElement(); if (description.equals(entry.getDescription())) { return entry; } } // We failed, now try treating description as type return find(description); } String getTempFileTemplate() { return tempFileTemplate; } public synchronized Enumeration<MimeEntry> elements() { return entries.elements(); } // For backward compatibility -- mailcap format files // This is not currently used, but may in the future when we add ability // to read BOTH the properties format and the mailcap format. protected static String[] mailcapLocations; public synchronized void load() { Properties entries = new Properties(); File file = null; try { InputStream is; // First try to load the user-specific table, if it exists String userTablePath = System.getProperty("content.types.user.table"); if (userTablePath != null) { file = new File(userTablePath); if (!file.exists()) { // No user-table, try to load the default built-in table. file = new File(System.getProperty("java.home") + File.separator + "lib" + File.separator + "content-types.properties"); } } else { // No user table, try to load the default built-in table. file = new File(System.getProperty("java.home") + File.separator + "lib" + File.separator + "content-types.properties"); } is = new BufferedInputStream(new FileInputStream(file)); entries.load(is); is.close(); } catch (IOException e) { System.err.println("Warning: default mime table not found: " + file.getPath()); return; } parse(entries); } void parse(Properties entries) { // first, strip out the platform-specific temp file template String tempFileTemplate = (String)entries.get("temp.file.template"); if (tempFileTemplate != null) { entries.remove("temp.file.template"); MimeTable.tempFileTemplate = tempFileTemplate; } // now, parse the mime-type spec's Enumeration<?> types = entries.propertyNames(); while (types.hasMoreElements()) { String type = (String)types.nextElement(); String attrs = entries.getProperty(type); parse(type, attrs); } } // // Table format: // // <entry> ::= <table_tag> | <type_entry> // // <table_tag> ::= <table_format_version> | <temp_file_template> // // <type_entry> ::= <type_subtype_pair> '=' <type_attrs_list> // // <type_subtype_pair> ::= <type> '/' <subtype> // // <type_attrs_list> ::= <attr_value_pair> [ ';' <attr_value_pair> ]* // | [ <attr_value_pair> ]+ // // <attr_value_pair> ::= <attr_name> '=' <attr_value> // // <attr_name> ::= 'description' | 'action' | 'application' // | 'file_extensions' | 'icon' // // <attr_value> ::= <legal_char>* // // Embedded ';' in an <attr_value> are quoted with leading '\' . // // Interpretation of <attr_value> depends on the <attr_name> it is // associated with. // void parse(String type, String attrs) { MimeEntry newEntry = new MimeEntry(type); // REMIND handle embedded ';' and '|' and literal '"' StringTokenizer tokenizer = new StringTokenizer(attrs, ";"); while (tokenizer.hasMoreTokens()) { String pair = tokenizer.nextToken(); parse(pair, newEntry); } add(newEntry); } void parse(String pair, MimeEntry entry) { // REMIND add exception handling... String name = null; String value = null; boolean gotName = false; StringTokenizer tokenizer = new StringTokenizer(pair, "="); while (tokenizer.hasMoreTokens()) { if (gotName) { value = tokenizer.nextToken().trim(); } else { name = tokenizer.nextToken().trim(); gotName = true; } } fill(entry, name, value); } void fill(MimeEntry entry, String name, String value) { if ("description".equalsIgnoreCase(name)) { entry.setDescription(value); } else if ("action".equalsIgnoreCase(name)) { entry.setAction(getActionCode(value)); } else if ("application".equalsIgnoreCase(name)) { entry.setCommand(value); } else if ("icon".equalsIgnoreCase(name)) { entry.setImageFileName(value); } else if ("file_extensions".equalsIgnoreCase(name)) { entry.setExtensions(value); } // else illegal name exception } String[] getExtensions(String list) { StringTokenizer tokenizer = new StringTokenizer(list, ","); int n = tokenizer.countTokens(); String[] extensions = new String[n]; for (int i = 0; i < n; i++) { extensions[i] = tokenizer.nextToken(); } return extensions; } int getActionCode(String action) { for (int i = 0; i < MimeEntry.actionKeywords.length; i++) { if (action.equalsIgnoreCase(MimeEntry.actionKeywords[i])) { return i; } } return MimeEntry.UNKNOWN; } public synchronized boolean save(String filename) { if (filename == null) { filename = System.getProperty("user.home" + File.separator + "lib" + File.separator + "content-types.properties"); } return saveAsProperties(new File(filename)); } public Properties getAsProperties() { Properties properties = new Properties(); Enumeration<MimeEntry> e = elements(); while (e.hasMoreElements()) { MimeEntry entry = e.nextElement(); properties.put(entry.getType(), entry.toProperty()); } return properties; } protected boolean saveAsProperties(File file) { FileOutputStream os = null; try { os = new FileOutputStream(file); Properties properties = getAsProperties(); properties.put("temp.file.template", tempFileTemplate); String tag; String user = System.getProperty("user.name"); if (user != null) { tag = "; customized for " + user; properties.store(os, filePreamble + tag); } else { properties.store(os, filePreamble); } } catch (IOException e) { e.printStackTrace(); return false; } finally { if (os != null) { try { os.close(); } catch (IOException e) {} } } return true; } /* * Debugging utilities * public void list(PrintStream out) { Enumeration keys = entries.keys(); while (keys.hasMoreElements()) { String key = (String)keys.nextElement(); MimeEntry entry = (MimeEntry)entries.get(key); out.println(key + ": " + entry); } } public static void main(String[] args) { MimeTable testTable = MimeTable.getDefaultTable(); Enumeration e = testTable.elements(); while (e.hasMoreElements()) { MimeEntry entry = (MimeEntry)e.nextElement(); System.out.println(entry); } testTable.save(File.separator + "tmp" + File.separator + "mime_table.save"); } */ }