com.sun.webkit.network.PublicSuffixes Maven / Gradle / Ivy
/*
* Copyright (c) 2011, 2018, 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
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*/
package com.sun.webkit.network;
import com.sun.javafx.logging.PlatformLogger;
import com.sun.javafx.logging.PlatformLogger.Level;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.IDN;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* A collection of static utility methods dealing with "public suffixes".
*/
final class PublicSuffixes {
private static final PlatformLogger logger =
PlatformLogger.getLogger(PublicSuffixes.class.getName());
/**
* Public suffix list rule types.
*/
private enum Rule {
SIMPLE_RULE,
WILDCARD_RULE,
EXCEPTION_RULE,
}
/**
* The mapping from domain names to public suffix list rules.
*/
private static final Map RULES =
loadRules("effective_tld_names.dat");
/**
* The private default constructor. Ensures non-instantiability.
*/
private PublicSuffixes() {
throw new AssertionError();
}
/**
* Determines if a domain is a public suffix.
*/
static boolean isPublicSuffix(String domain) {
if (domain.length() == 0) {
return false;
}
Rule rule = RULES.get(domain);
if (rule == Rule.EXCEPTION_RULE) {
return false;
} else if (rule == Rule.SIMPLE_RULE || rule == Rule.WILDCARD_RULE) {
return true;
} else {
int pos = domain.indexOf('.') + 1;
if (pos == 0) {
pos = domain.length();
}
String parent = domain.substring(pos);
return RULES.get(parent) == Rule.WILDCARD_RULE;
}
}
/**
* Loads the public suffix list from a given resource.
*/
private static Map loadRules(String resourceName) {
logger.finest("resourceName: [{0}]", resourceName);
Map result = null;
InputStream is = PublicSuffixes.class.getResourceAsStream(resourceName);
if (is != null) {
BufferedReader reader = null;
try {
reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
result = loadRules(reader);
} catch (IOException ex) {
logger.warning("Unexpected error", ex);
} finally {
try {
if (reader != null) {
reader.close();
}
} catch (IOException ex) {
logger.warning("Unexpected error", ex);
}
}
} else {
logger.warning("Resource not found: [{0}]",
resourceName);
}
result = result != null
? Collections.unmodifiableMap(result)
: Collections.emptyMap();
if (logger.isLoggable(Level.FINEST)) {
logger.finest("result: {0}", toLogString(result));
}
return result;
}
/**
* Loads the public suffix list from a given reader.
*/
private static Map loadRules(BufferedReader reader)
throws IOException
{
Map result = new LinkedHashMap();
String line;
while ((line = reader.readLine()) != null) {
line = line.split("\\s+", 2)[0];
if (line.length() == 0) {
continue;
}
if (line.startsWith("//")) {
continue;
}
Rule rule;
if (line.startsWith("!")) {
line = line.substring(1);
rule = Rule.EXCEPTION_RULE;
} else if (line.startsWith("*.")) {
line = line.substring(2);
rule = Rule.WILDCARD_RULE;
} else {
rule = Rule.SIMPLE_RULE;
}
try {
line = IDN.toASCII(line, IDN.ALLOW_UNASSIGNED);
} catch (Exception ex) {
logger.warning(String.format("Error parsing rule: [%s]", line), ex);
continue;
}
result.put(line, rule);
}
return result;
}
/**
* Converts a map of rules to a string suitable for displaying
* in the log.
*/
private static String toLogString(Map rules) {
if (rules.isEmpty()) {
return "{}";
}
StringBuilder sb = new StringBuilder();
for (Map.Entry entry : rules.entrySet()) {
sb.append(String.format("%n "));
sb.append(entry.getKey());
sb.append(": ");
sb.append(entry.getValue());
}
return sb.toString();
}
}