/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. 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. For additional information regarding
* copyright in this work, please see the NOTICE file in the top level
* directory of this distribution.
*/
package org.apache.abdera.protocol.util;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
import java.util.zip.InflaterInputStream;
import org.apache.commons.codec.net.QCodec;
public class EncodingUtil {
public static String encode(String value, String charset) {
try {
return (new QCodec(charset)).encode(value);
} catch (Exception e) {
return value;
}
}
public static String decode(String value) {
try {
return (new QCodec()).decode(value);
} catch (Exception e) {
return value;
}
}
public enum ContentEncoding { GZIP, XGZIP, DEFLATE }
public static OutputStream getEncodedOutputStream(OutputStream out, ContentEncoding encoding) throws IOException {
return getEncodedOutputStream(out, new ContentEncoding[] {encoding});
}
public static OutputStream getEncodedOutputStream(OutputStream out, ContentEncoding... encodings) throws IOException {
for (ContentEncoding encoding:encodings) {
switch(encoding) {
case GZIP:
out = new GZIPOutputStream(out); break;
case DEFLATE:
out = new DeflaterOutputStream(out); break;
}
}
return out;
}
public static InputStream getDecodingInputStream(InputStream in, String ce) throws IOException {
String[] encodings = CacheControlParser.splitAndTrim(ce, ",", false);
for (int n = encodings.length -1; n >= 0; n--) {
switch(ContentEncoding.valueOf(encodings[n].toUpperCase().replaceAll("-", ""))) {
case GZIP:
case XGZIP:
in = new GZIPInputStream(in); break;
case DEFLATE:
in = new InflaterInputStream(in); break;
}
}
return in;
}
}