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/*
* 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;
public class AcceptEncoding {
private final String encoding;
private final double quality;
protected AcceptEncoding(String encoding, double quality) {
this.encoding = encoding;
this.quality = quality;
}
public String getEncoding() {
return encoding;
}
public double getQuality() {
return quality;
}
public static List<AcceptEncoding> parse(StringReader input) throws IOException {
List<AcceptEncoding> result = new ArrayList<>();
do {
String encoding = HttpParser.readToken(input);
if (encoding == null) {
// Invalid encoding, skip to the next one
HttpParser.skipUntil(input, 0, ',');
continue;
}
if (encoding.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 AcceptEncoding(encoding, quality));
}
} while (true);
return result;
}
}
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