/*
* Copyright (c) 1994, 1999, 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.util.Calendar;
import java.util.Date;
import java.text.SimpleDateFormat;
import java.net.URL;
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 */
private Hashtable entries = new Hashtable();
/** Keyed by file extension (with the .), returns MimeEntries */
private Hashtable extensionMap = new Hashtable();
// Will be reset if in the platform-specific data file
private static String tempFileTemplate;
static {
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction() {
public Object 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;
private static MimeTable defaultInstance = null;
MimeTable() {
load();
}
/**
* Get the single instance of this class. First use will load the
* table from a data file.
*/
public static MimeTable getDefaultTable() {
if (defaultInstance == null) {
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction() {
public Object run() {
defaultInstance = new MimeTable();
URLConnection.setFileNameMap(defaultInstance);
return null;
}
});
}
return 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 = (MimeEntry)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 (MimeEntry)entries.remove(entry.getType());
}
public synchronized MimeEntry find(String type) {
MimeEntry entry = (MimeEntry)entries.get(type);
if (entry == null) {
// try a wildcard lookup
Enumeration e = entries.elements();
while (e.hasMoreElements()) {
MimeEntry wild = (MimeEntry)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.
*/
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.
*/
public synchronized MimeEntry findByExt(String fileExtension) {
return (MimeEntry)extensionMap.get(fileExtension);
}
public synchronized MimeEntry findByDescription(String description) {
Enumeration e = elements();
while (e.hasMoreElements()) {
MimeEntry entry = (MimeEntry)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 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");
this.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 e = elements();
while (e.hasMoreElements()) {
MimeEntry entry = (MimeEntry)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.save(os, filePreamble + tag);
}
else {
properties.save(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");
}
*/
}