mirror of https://github.com/M66B/FairEmail.git
179 lines
6.0 KiB
Java
179 lines
6.0 KiB
Java
/*
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* Copyright (C) 2014-2015 Dominik Schürmann <dominik@dominikschuermann.de>
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* 2013 Florian Schmaus <flo@geekplace.eu>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.openintents.openpgp.util;
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import java.io.BufferedInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import android.os.ParcelFileDescriptor;
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import android.os.ParcelFileDescriptor.AutoCloseInputStream;
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import android.system.ErrnoException;
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import android.system.OsConstants;
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import android.util.Log;
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import org.openintents.openpgp.util.OpenPgpApi.OpenPgpDataSink;
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import org.openintents.openpgp.util.OpenPgpApi.OpenPgpDataSource;
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public class ParcelFileDescriptorUtil {
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public static ParcelFileDescriptor pipeFrom(InputStream inputStream)
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throws IOException {
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ParcelFileDescriptor[] pipe = ParcelFileDescriptor.createPipe();
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ParcelFileDescriptor readSide = pipe[0];
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ParcelFileDescriptor writeSide = pipe[1];
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new TransferThread(inputStream, new ParcelFileDescriptor.AutoCloseOutputStream(writeSide))
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.start();
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return readSide;
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}
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public static TransferThread pipeTo(OutputStream outputStream, ParcelFileDescriptor output) {
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AutoCloseInputStream InputStream = new AutoCloseInputStream(output);
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TransferThread t = new TransferThread(InputStream, outputStream);
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t.start();
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return t;
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}
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static class TransferThread extends Thread {
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final InputStream mIn;
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final OutputStream mOut;
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TransferThread(InputStream in, OutputStream out) {
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super("IPC Transfer Thread");
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mIn = in;
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mOut = out;
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setDaemon(true);
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}
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@Override
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public void run() {
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byte[] buf = new byte[4096];
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int len;
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try {
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while ((len = mIn.read(buf)) > 0) {
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mOut.write(buf, 0, len);
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}
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} catch (IOException e) {
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Log.e(OpenPgpApi.TAG, "IOException when writing to out", e);
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} finally {
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try {
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mIn.close();
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} catch (IOException ignored) {
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}
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try {
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mOut.close();
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} catch (IOException ignored) {
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}
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}
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}
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}
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public static <T> DataSinkTransferThread<T> asyncPipeToDataSink(
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OpenPgpDataSink<T> dataSink, ParcelFileDescriptor output) {
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InputStream inputStream = new BufferedInputStream(new AutoCloseInputStream(output));
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DataSinkTransferThread<T> dataSinkTransferThread = new DataSinkTransferThread<>(dataSink, inputStream);
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dataSinkTransferThread.start();
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return dataSinkTransferThread;
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}
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static class DataSourceTransferThread extends Thread {
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final OpenPgpDataSource dataSource;
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final OutputStream outputStream;
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DataSourceTransferThread(OpenPgpDataSource dataSource, OutputStream outputStream) {
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super("IPC Transfer Thread (TO service)");
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this.dataSource = dataSource;
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this.outputStream = outputStream;
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setDaemon(true);
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}
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@Override
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public void run() {
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try {
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dataSource.writeTo(outputStream);
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} catch (IOException e) {
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if (dataSource.isCancelled()) {
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Log.d(OpenPgpApi.TAG, "Stopped writing because operation was cancelled.");
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} else if (isIOExceptionCausedByEPIPE(e)) {
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Log.d(OpenPgpApi.TAG, "Stopped writing due to broken pipe (other end closed pipe?)");
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} else {
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Log.e(OpenPgpApi.TAG, "IOException when writing to out", e);
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}
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} finally {
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try {
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outputStream.close();
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} catch (IOException ignored) {
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}
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}
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}
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}
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private static boolean isIOExceptionCausedByEPIPE(IOException e) {
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Throwable cause = e.getCause();
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return cause instanceof ErrnoException && ((ErrnoException) cause).errno == OsConstants.EPIPE;
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}
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static class DataSinkTransferThread<T> extends Thread {
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final OpenPgpDataSink<T> dataSink;
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final InputStream inputStream;
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T sinkResult;
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DataSinkTransferThread(OpenPgpDataSink<T> dataSink, InputStream inputStream) {
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super("IPC Transfer Thread (FROM service)");
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this.dataSink = dataSink;
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this.inputStream = inputStream;
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setDaemon(true);
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}
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@Override
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public void run() {
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try {
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sinkResult = dataSink.processData(inputStream);
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} catch (IOException e) {
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if (isIOExceptionCausedByEPIPE(e)) {
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Log.e(OpenPgpApi.TAG, "Stopped read due to broken pipe (other end closed pipe?)");
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} else {
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Log.e(OpenPgpApi.TAG, "IOException while reading from in", e);
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}
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sinkResult = null;
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} finally {
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try {
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inputStream.close();
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} catch (IOException ignored) {
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}
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}
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}
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T getResult() {
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if (isAlive()) {
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throw new IllegalStateException("result must be accessed only *after* the thread finished execution!");
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}
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return sinkResult;
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}
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}
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}
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