| /* |
| * Copyright (C) 2021 The Android Open Source Project |
| * |
| * 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.android.libraries.entitlement.utils; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| |
| import androidx.annotation.Nullable; |
| |
| import java.io.BufferedInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| /** Utility methods about {@link InputStream}. */ |
| public final class StreamUtils { |
| private static final int BUFFER_SIZE = 1024; |
| |
| private StreamUtils() {} |
| |
| /** Reads an {@link InputStream} into a UTF-8 string. */ |
| public static String inputStreamToString(@Nullable InputStream inputStream) throws IOException { |
| if (inputStream == null) { |
| throw new IOException("inputStream is null"); |
| } |
| try (BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream); |
| ByteArrayOutputStream result = new ByteArrayOutputStream()) { |
| byte[] buffer = new byte[BUFFER_SIZE]; |
| int length = 0; |
| while ((length = inputStream.read(buffer)) != -1) { |
| result.write(buffer, 0, length); |
| } |
| return result.toString(UTF_8.name()); |
| } |
| } |
| |
| /** Reads an {@link InputStream} into a UTF-8 string. Returns an empty string if any error. */ |
| public static String inputStreamToStringSafe(@Nullable InputStream inputStream) { |
| try { |
| return inputStreamToString(inputStream); |
| } catch (IOException e) { |
| return ""; |
| } |
| } |
| } |