| /** |
| * 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.camel.component.http.helper; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.zip.GZIPInputStream; |
| import java.util.zip.GZIPOutputStream; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Message; |
| import org.apache.camel.util.IOHelper; |
| |
| /** |
| * Helper class to help wrapping content into GZIP input and output streams. |
| */ |
| public final class GZIPHelper { |
| |
| private GZIPHelper() { |
| } |
| |
| public static InputStream uncompressGzip(String contentEncoding, InputStream in) throws IOException { |
| if (isGzip(contentEncoding)) { |
| return new GZIPInputStream(in); |
| } else { |
| return in; |
| } |
| } |
| |
| public static InputStream compressGzip(String contentEncoding, InputStream in) throws IOException { |
| if (isGzip(contentEncoding)) { |
| ByteArrayOutputStream os = new ByteArrayOutputStream(); |
| GZIPOutputStream gzip = new GZIPOutputStream(os); |
| try { |
| IOHelper.copy(in, gzip); |
| gzip.finish(); |
| return new ByteArrayInputStream(os.toByteArray()); |
| } finally { |
| IOHelper.close(gzip, "gzip"); |
| IOHelper.close(os, "byte array output stream"); |
| } |
| } else { |
| return in; |
| } |
| } |
| |
| public static InputStream compressGzip(String contentEncoding, byte[] data) throws IOException { |
| if (isGzip(contentEncoding)) { |
| ByteArrayOutputStream os = null; |
| GZIPOutputStream gzip = null; |
| try { |
| os = new ByteArrayOutputStream(); |
| gzip = new GZIPOutputStream(os); |
| gzip.write(data); |
| gzip.finish(); |
| return new ByteArrayInputStream(os.toByteArray()); |
| } finally { |
| IOHelper.close(gzip, "gzip"); |
| IOHelper.close(os, "byte array output stream"); |
| } |
| } else { |
| return new ByteArrayInputStream(data); |
| } |
| } |
| |
| public static byte[] compressGZIP(byte[] data) throws IOException { |
| ByteArrayOutputStream os = new ByteArrayOutputStream(); |
| GZIPOutputStream gzip = new GZIPOutputStream(os); |
| try { |
| gzip.write(data); |
| gzip.finish(); |
| return os.toByteArray(); |
| } finally { |
| IOHelper.close(gzip, "gzip"); |
| IOHelper.close(os, "byte array"); |
| } |
| } |
| |
| public static boolean isGzip(Message message) { |
| return isGzip(message.getHeader(Exchange.CONTENT_ENCODING, String.class), message.getExchange()); |
| } |
| |
| public static boolean isGzip(String header , Exchange exchange) { |
| if (exchange == null || !exchange.getProperty(Exchange.SKIP_GZIP_ENCODING, Boolean.FALSE, Boolean.class)) { |
| return isGzip(header); |
| } else { |
| return false; |
| } |
| } |
| |
| public static boolean isGzip(String header) { |
| return header != null && header.toLowerCase().contains("gzip"); |
| } |
| |
| } |