com.github.tomakehurst.wiremock.common.Gzip Maven / Gradle / Ivy

/*
 * Copyright (C) 2011 Thomas Akehurst
 *
 * 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.github.tomakehurst.wiremock.common;

import com.google.common.io.ByteStreams;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

import static com.github.tomakehurst.wiremock.common.Exceptions.throwUnchecked;
import static com.google.common.base.Charsets.UTF_8;

public class Gzip {

    public static byte[] unGzip(byte[] gzippedContent) {
        try {
            GZIPInputStream gzipInputStream = new GZIPInputStream(new ByteArrayInputStream(gzippedContent));
            return ByteStreams.toByteArray(gzipInputStream);
        } catch (IOException e) {
            return throwUnchecked(e, byte[].class);
        }
    }

    public static String unGzipToString(byte[] gzippedContent) {
        return new String(unGzip(gzippedContent));
    }

    public static byte[] gzip(String plainContent) {
        try {
            ByteArrayOutputStream bytes = new ByteArrayOutputStream();
            GZIPOutputStream gzipOutputStream = new GZIPOutputStream(bytes);
            gzipOutputStream.write(plainContent.getBytes(UTF_8));
            gzipOutputStream.close();
            return bytes.toByteArray();
        } catch (IOException e) {
            return throwUnchecked(e, byte[].class);
        }
    }

    public static boolean isGzipped(byte[] content) {
        return content.length >= 2
                && content[0] == (byte)GZIPInputStream.GZIP_MAGIC
                && content[1] == (byte)(GZIPInputStream.GZIP_MAGIC >> 8);
    }
}