com.sun.syndication.fetcher.impl.ResponseHandler Maven / Gradle / Ivy
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/*
* Copyright 2004 Sun Microsystems, Inc.
*
* Licensed 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 com.sun.syndication.fetcher.impl;
import java.net.URLConnection;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Utility class to help deal with HTTP responses
*
*/
public class ResponseHandler {
public static final String defaultCharacterEncoding = "ISO-8859-1";
private final static Pattern characterEncodingPattern = Pattern.compile("charset=([.[^; ]]*)");
public static String getCharacterEncoding(URLConnection connection) {
return getCharacterEncoding(connection.getContentType());
}
/**
*
* Gets the character encoding of a response. (Note that this is different to
* the content-encoding)
*
* @param contentTypeHeader the value of the content-type HTTP header eg: text/html; charset=ISO-8859-4
* @return the character encoding, eg: ISO-8859-4
*/
public static String getCharacterEncoding(String contentTypeHeader) {
if (contentTypeHeader == null) {
return defaultCharacterEncoding;
}
Matcher m = characterEncodingPattern.matcher(contentTypeHeader);
//if (!m.matches()) {
if (!m.find()) {
return defaultCharacterEncoding;
} else {
return m.group(1);
}
}
}