/*
* 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.jmeter.protocol.http.util;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import org.apache.oro.util.Cache;
import org.apache.oro.util.CacheLRU;
public class EncoderCache {
/** The encoding which should be usd for URLs, according to HTTP specification */
public static final String URL_ARGUMENT_ENCODING = StandardCharsets.UTF_8.name();
private Cache cache;
public EncoderCache(int cacheSize) {
cache = new CacheLRU(cacheSize);
}
/**
* Get the specified value URL encoded using UTF-8 encoding
*
* @param k the value to encode
* @return the value URL encoded using UTF-8
*/
public String getEncoded(String k) {
try {
return getEncoded(k, URL_ARGUMENT_ENCODING);
} catch (UnsupportedEncodingException e) {
// This can't happen (how should utf8 not be supported!?!),
// so just throw an Error:
throw new Error("Should not happen: " + e.toString());
}
}
/**
* Get the specified value URL encoded using the specified encoding
*
* @param k the value to encode
* @param contentEncoding the encoding to use when URL encoding
* @return the value URL encoded using the specified encoding
* @throws UnsupportedEncodingException if the specified encoding is not supported
*/
public String getEncoded(String k, String contentEncoding) throws UnsupportedEncodingException {
String cacheKey = k + contentEncoding;
// Check if we have it in the cache
Object encodedValue = cache.getElement(cacheKey);
if (encodedValue != null) {
return (String) encodedValue;
}
// Perform the encoding
encodedValue = URLEncoder.encode(k, contentEncoding);
// Add to cache
cache.addElement(cacheKey, encodedValue);
return (String) encodedValue;
}
}