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      1 /*
      2  * Copyright (C) 2014 Square, Inc.
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package okio;
     17 
     18 import java.io.EOFException;
     19 import java.io.IOException;
     20 import java.io.InputStream;
     21 import java.io.OutputStream;
     22 import java.net.ServerSocket;
     23 import java.net.Socket;
     24 import java.net.SocketTimeoutException;
     25 import java.util.concurrent.TimeUnit;
     26 import org.junit.Test;
     27 
     28 import static org.junit.Assert.assertTrue;
     29 import static org.junit.Assert.fail;
     30 
     31 public class SocketTimeoutTest {
     32 
     33   // The size of the socket buffers to use. Less than half the data transferred during tests to
     34   // ensure send and receive buffers are flooded and any necessary blocking behavior takes place.
     35   private static final int SOCKET_BUFFER_SIZE = 256 * 1024;
     36   private static final int ONE_MB = 1024 * 1024;
     37 
     38   @Test public void readWithoutTimeout() throws Exception {
     39     Socket socket = socket(ONE_MB, 0);
     40     BufferedSource source = Okio.buffer(Okio.source(socket));
     41     source.timeout().timeout(5000, TimeUnit.MILLISECONDS);
     42     source.require(ONE_MB);
     43     socket.close();
     44   }
     45 
     46   @Test public void readWithTimeout() throws Exception {
     47     Socket socket = socket(0, 0);
     48     BufferedSource source = Okio.buffer(Okio.source(socket));
     49     source.timeout().timeout(250, TimeUnit.MILLISECONDS);
     50     try {
     51       source.require(ONE_MB);
     52       fail();
     53     } catch (SocketTimeoutException expected) {
     54     }
     55     socket.close();
     56   }
     57 
     58   @Test public void writeWithoutTimeout() throws Exception {
     59     Socket socket = socket(0, ONE_MB);
     60     Sink sink = Okio.buffer(Okio.sink(socket));
     61     sink.timeout().timeout(500, TimeUnit.MILLISECONDS);
     62     byte[] data = new byte[ONE_MB];
     63     sink.write(new Buffer().write(data), data.length);
     64     sink.flush();
     65     socket.close();
     66   }
     67 
     68   @Test public void writeWithTimeout() throws Exception {
     69     Socket socket = socket(0, 0);
     70     Sink sink = Okio.sink(socket);
     71     sink.timeout().timeout(500, TimeUnit.MILLISECONDS);
     72     byte[] data = new byte[ONE_MB];
     73     long start = System.nanoTime();
     74     try {
     75       sink.write(new Buffer().write(data), data.length);
     76       sink.flush();
     77       fail();
     78     } catch (SocketTimeoutException expected) {
     79     }
     80     long elapsed = System.nanoTime() - start;
     81     socket.close();
     82 
     83     assertTrue("elapsed: " + elapsed, TimeUnit.NANOSECONDS.toMillis(elapsed) >= 500);
     84     assertTrue("elapsed: " + elapsed, TimeUnit.NANOSECONDS.toMillis(elapsed) <= 750);
     85   }
     86 
     87   /**
     88    * Returns a socket that can read {@code readableByteCount} incoming bytes and
     89    * will accept {@code writableByteCount} written bytes. The socket will idle
     90    * for 5 seconds when the required data has been read and written.
     91    */
     92   static Socket socket(final int readableByteCount, final int writableByteCount) throws IOException {
     93     final ServerSocket serverSocket = new ServerSocket(0);
     94     serverSocket.setReuseAddress(true);
     95     serverSocket.setReceiveBufferSize(SOCKET_BUFFER_SIZE);
     96 
     97     Thread peer = new Thread("peer") {
     98       @Override public void run() {
     99         Socket socket = null;
    100         try {
    101           socket = serverSocket.accept();
    102           socket.setSendBufferSize(SOCKET_BUFFER_SIZE);
    103           writeFully(socket.getOutputStream(), readableByteCount);
    104           readFully(socket.getInputStream(), writableByteCount);
    105           Thread.sleep(5000); // Sleep 5 seconds so the peer can close the connection.
    106         } catch (Exception ignored) {
    107         } finally {
    108           try {
    109             if (socket != null) socket.close();
    110           } catch (IOException ignored) {
    111           }
    112         }
    113       }
    114     };
    115     peer.start();
    116 
    117     Socket socket = new Socket(serverSocket.getInetAddress(), serverSocket.getLocalPort());
    118     socket.setReceiveBufferSize(SOCKET_BUFFER_SIZE);
    119     socket.setSendBufferSize(SOCKET_BUFFER_SIZE);
    120     return socket;
    121   }
    122 
    123   private static void writeFully(OutputStream out, int byteCount) throws IOException {
    124     out.write(new byte[byteCount]);
    125     out.flush();
    126   }
    127 
    128   private static byte[] readFully(InputStream in, int byteCount) throws IOException {
    129     int count = 0;
    130     byte[] result = new byte[byteCount];
    131     while (count < byteCount) {
    132       int read = in.read(result, count, result.length - count);
    133       if (read == -1) throw new EOFException();
    134       count += read;
    135     }
    136     return result;
    137   }
    138 }
    139