com.microsoft.alm.helpers.IOHelper Maven / Gradle / Ivy

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// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See License.txt in the project root.

package com.microsoft.alm.helpers;

import java.io.BufferedReader;
import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;

public class IOHelper {

    static final int BUFFER_SIZE = 4096;

    public static void closeQuietly(final Closeable closeable) {
        if (closeable != null) {
            try {
                closeable.close();
            } catch (final IOException ignored) {
            }
        }
    }

    public static String readFileToString(final File file) throws IOException {
        FileInputStream fis = null;
        try {
            fis = new FileInputStream(file);
            return readToString(fis);
        } finally {
            IOHelper.closeQuietly(fis);
        }
    }

    public static String readToString(final InputStream stream) throws IOException {
        InputStreamReader isr = null;
        BufferedReader reader = null;
        try {
            isr = new InputStreamReader(stream);
            reader = new BufferedReader(isr);

            final StringBuilder sb = new StringBuilder();
            String line;
            while ((line = reader.readLine()) != null) {
                sb.append(line);
                sb.append(Environment.NewLine);
            }
            return sb.toString();
        } finally {
            IOHelper.closeQuietly(reader);
            IOHelper.closeQuietly(isr);
        }
    }

    public static void copyStream(final InputStream is, final OutputStream os) throws IOException {
        final byte[] buffer = new byte[BUFFER_SIZE];
        int bytesRead;
        while ((bytesRead = is.read(buffer, 0, BUFFER_SIZE)) != -1) {
            os.write(buffer, 0, bytesRead);
        }
        os.flush();
    }
}