com.gabrielittner.github.diff.androidmanifest.AndroidXmlTranslator Maven / Gradle / Ivy

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There is a newer version: 0.8.0

/*
 * Copyright 2015 Google, 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.gabrielittner.github.diff.androidmanifest;

import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

/**
 * Is a function : (apk file) --> ,manifest XML text, as list of tokens with tag
 * based om code posted on StackOverflow by Ribo:
 * http://stackoverflow.com/a/4761689/496992
 * 
 * There is a bug that some manifests can't be shown, added a fallback case to display
 * all strings
 */
public class AndroidXmlTranslator {
    private static final String DEFAULT_CLASS_NAME = "AndroidManifest.xml";

    public static String parse(InputStream apk) {
        ZipInputStream is = null;
        ByteArrayOutputStream bout = null;
        try {
            long size = apk.available();
            ZipInputStream zip = new ZipInputStream(apk);
            do {
                ZipEntry entry = zip.getNextEntry();
                if (entry.getName().equals(DEFAULT_CLASS_NAME)) {
                    is = zip;
                }
            } while (is == null);

            bout = new ByteArrayOutputStream((int) size);
            byte[] buffer = new byte[1024];
            int bytesRead;
            while ((bytesRead = is.read(buffer)) > 0) {
                bout.write(buffer, 0, bytesRead);
            }

            XmlDecompressor xmlDecompressor = new XmlDecompressor();
            return xmlDecompressor.decompressXml(bout.toByteArray());
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            closeResource(is);
            closeResource(bout);
        }
    }

    private static void closeResource(Closeable closeable) {
        if (closeable == null) {
            return;
        }

        try {
            closeable.close();
        } catch (IOException ex) {
            System.err.println("Error closing resource: " + ex.getMessage());
            ex.printStackTrace(System.err);
        }
    }
}