/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.tomcat.util.http.parser;
import java.io.IOException;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
public class AcceptLanguage {
private final Locale locale;
private final double quality;
protected AcceptLanguage(Locale locale, double quality) {
this.locale = locale;
this.quality = quality;
}
public Locale getLocale() {
return locale;
}
public double getQuality() {
return quality;
}
public static List<AcceptLanguage> parse(StringReader input) throws IOException {
List<AcceptLanguage> result = new ArrayList<>();
do {
// Token is broader than what is permitted in a language tag
// (alphanumeric + '-') but any invalid values that slip through
// will be caught later
String languageTag = HttpParser.readToken(input);
if (languageTag == null) {
// Invalid tag, skip to the next one
HttpParser.skipUntil(input, 0, ',');
continue;
}
if (languageTag.isEmpty()) {
// No more data to read
break;
}
// See if a quality has been provided
double quality = 1;
SkipResult lookForSemiColon = HttpParser.skipConstant(input, ";");
if (lookForSemiColon == SkipResult.FOUND) {
quality = HttpParser.readWeight(input, ',');
}
if (quality > 0) {
result.add(new AcceptLanguage(Locale.forLanguageTag(languageTag), quality));
}
} while (true);
return result;
}
}