author | chegar |
Wed, 08 Nov 2017 09:34:56 +0000 | |
branch | http-client-branch |
changeset 55777 | e62cbcc08cae |
parent 55763 | 634d8e14c172 |
child 55792 | 0936888d5a4a |
permissions | -rw-r--r-- |
55763 | 1 |
/* |
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* Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package jdk.incubator.http; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.io.UncheckedIOException; |
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import java.nio.ByteBuffer; |
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import java.nio.charset.Charset; |
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import java.nio.file.Path; |
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import java.security.AccessControlContext; |
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import java.security.AccessController; |
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import java.security.PrivilegedAction; |
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import java.security.PrivilegedActionException; |
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import java.security.PrivilegedExceptionAction; |
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import java.util.ArrayList; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.NoSuchElementException; |
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import java.util.Objects; |
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import java.util.concurrent.ConcurrentLinkedQueue; |
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import java.util.concurrent.Flow; |
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import java.util.function.Supplier; |
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import jdk.incubator.http.HttpRequest.BodyPublisher; |
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import jdk.incubator.http.internal.common.Utils; |
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class RequestPublishers { |
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static class ByteArrayPublisher implements HttpRequest.BodyPublisher { |
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private volatile Flow.Publisher<ByteBuffer> delegate; |
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private final int length; |
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private final byte[] content; |
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private final int offset; |
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private final int bufSize; |
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ByteArrayPublisher(byte[] content) { |
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this(content, 0, content.length); |
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} |
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ByteArrayPublisher(byte[] content, int offset, int length) { |
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this(content, offset, length, Utils.BUFSIZE); |
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} |
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/* bufSize exposed for testing purposes */ |
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ByteArrayPublisher(byte[] content, int offset, int length, int bufSize) { |
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this.content = content; |
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this.offset = offset; |
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this.length = length; |
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this.bufSize = bufSize; |
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} |
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List<ByteBuffer> copy(byte[] content, int offset, int length) { |
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List<ByteBuffer> bufs = new ArrayList<>(); |
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while (length > 0) { |
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ByteBuffer b = ByteBuffer.allocate(Math.min(bufSize, length)); |
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int max = b.capacity(); |
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int tocopy = Math.min(max, length); |
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b.put(content, offset, tocopy); |
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offset += tocopy; |
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length -= tocopy; |
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b.flip(); |
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bufs.add(b); |
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} |
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return bufs; |
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} |
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@Override |
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public void subscribe(Flow.Subscriber<? super ByteBuffer> subscriber) { |
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List<ByteBuffer> copy = copy(content, offset, length); |
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this.delegate = new PullPublisher<>(copy); |
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delegate.subscribe(subscriber); |
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} |
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@Override |
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public long contentLength() { |
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return length; |
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} |
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} |
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// This implementation has lots of room for improvement. |
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static class IterablePublisher implements HttpRequest.BodyPublisher { |
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private volatile Flow.Publisher<ByteBuffer> delegate; |
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private final Iterable<byte[]> content; |
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private volatile long contentLength; |
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IterablePublisher(Iterable<byte[]> content) { |
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this.content = content; |
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} |
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// The ByteBufferIterator will iterate over the byte[] arrays in |
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// the content one at the time. |
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// |
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class ByteBufferIterator implements Iterator<ByteBuffer> { |
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final ConcurrentLinkedQueue<ByteBuffer> buffers = new ConcurrentLinkedQueue<>(); |
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final Iterator<byte[]> iterator = content.iterator(); |
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@Override |
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public boolean hasNext() { |
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return !buffers.isEmpty() || iterator.hasNext(); |
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} |
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@Override |
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public ByteBuffer next() { |
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ByteBuffer buffer = buffers.poll(); |
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while (buffer == null) { |
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copy(); |
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buffer = buffers.poll(); |
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} |
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return buffer; |
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} |
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ByteBuffer getBuffer() { |
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return Utils.getBuffer(); |
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} |
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void copy() { |
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byte[] bytes = iterator.next(); |
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int length = bytes.length; |
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if (length == 0 && iterator.hasNext()) { |
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// avoid inserting empty buffers, except |
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// if that's the last. |
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return; |
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} |
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int offset = 0; |
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do { |
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ByteBuffer b = getBuffer(); |
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int max = b.capacity(); |
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int tocopy = Math.min(max, length); |
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b.put(bytes, offset, tocopy); |
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offset += tocopy; |
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length -= tocopy; |
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b.flip(); |
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buffers.add(b); |
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} while (length > 0); |
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} |
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} |
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public Iterator<ByteBuffer> iterator() { |
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return new ByteBufferIterator(); |
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} |
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@Override |
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public void subscribe(Flow.Subscriber<? super ByteBuffer> subscriber) { |
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Iterable<ByteBuffer> iterable = this::iterator; |
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this.delegate = new PullPublisher<>(iterable); |
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delegate.subscribe(subscriber); |
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} |
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static long computeLength(Iterable<byte[]> bytes) { |
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long len = 0; |
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for (byte[] b : bytes) { |
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len = Math.addExact(len, (long)b.length); |
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} |
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return len; |
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} |
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@Override |
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public long contentLength() { |
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if (contentLength == 0) { |
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synchronized(this) { |
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if (contentLength == 0) { |
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contentLength = computeLength(content); |
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} |
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} |
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} |
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return contentLength; |
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} |
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} |
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static class StringPublisher extends ByteArrayPublisher { |
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public StringPublisher(String content, Charset charset) { |
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super(content.getBytes(charset)); |
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} |
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} |
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static class EmptyPublisher implements HttpRequest.BodyPublisher { |
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private final PseudoPublisher<ByteBuffer> delegate = new PseudoPublisher<>(); |
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@Override |
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public long contentLength() { |
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return 0; |
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} |
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@Override |
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public void subscribe(Flow.Subscriber<? super ByteBuffer> subscriber) { |
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delegate.subscribe(subscriber); |
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} |
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} |
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static class FilePublisher implements BodyPublisher { |
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private final File file; |
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private volatile AccessControlContext acc; |
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FilePublisher(Path name) { |
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file = name.toFile(); |
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} |
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void setAccessControlContext(AccessControlContext acc) { |
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this.acc = acc; |
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} |
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@Override |
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public void subscribe(Flow.Subscriber<? super ByteBuffer> subscriber) { |
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if (System.getSecurityManager() != null && acc == null) |
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throw new InternalError( |
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"Unexpected null acc when security manager has been installed"); |
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InputStream is; |
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try { |
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PrivilegedExceptionAction<FileInputStream> pa = |
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() -> new FileInputStream(file); |
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is = AccessController.doPrivileged(pa, acc); |
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} catch (PrivilegedActionException pae) { |
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throw new UncheckedIOException((IOException)pae.getCause()); |
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} |
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PullPublisher<ByteBuffer> publisher = |
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new PullPublisher<>(() -> new StreamIterator(is)); |
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publisher.subscribe(subscriber); |
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} |
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@Override |
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public long contentLength() { |
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assert System.getSecurityManager() != null ? acc != null: true; |
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PrivilegedAction<Long> pa = () -> file.length(); |
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return AccessController.doPrivileged(pa, acc); |
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} |
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} |
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/** |
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* Reads one buffer ahead all the time, blocking in hasNext() |
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*/ |
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static class StreamIterator implements Iterator<ByteBuffer> { |
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final InputStream is; |
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final Supplier<? extends ByteBuffer> bufSupplier; |
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volatile ByteBuffer nextBuffer; |
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volatile boolean need2Read = true; |
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volatile boolean haveNext; |
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volatile Throwable error; |
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StreamIterator(InputStream is) { |
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this(is, Utils::getBuffer); |
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} |
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StreamIterator(InputStream is, Supplier<? extends ByteBuffer> bufSupplier) { |
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this.is = is; |
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this.bufSupplier = bufSupplier; |
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} |
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Throwable error() { |
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return error; |
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} |
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private int read() { |
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nextBuffer = bufSupplier.get(); |
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nextBuffer.clear(); |
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byte[] buf = nextBuffer.array(); |
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int offset = nextBuffer.arrayOffset(); |
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int cap = nextBuffer.capacity(); |
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try { |
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int n = is.read(buf, offset, cap); |
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if (n == -1) { |
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is.close(); |
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return -1; |
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} |
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//flip |
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nextBuffer.limit(n); |
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nextBuffer.position(0); |
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return n; |
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} catch (IOException ex) { |
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error = ex; |
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return -1; |
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} |
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} |
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@Override |
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public synchronized boolean hasNext() { |
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if (need2Read) { |
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haveNext = read() != -1; |
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if (haveNext) { |
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need2Read = false; |
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} |
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return haveNext; |
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} |
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return haveNext; |
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} |
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@Override |
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public synchronized ByteBuffer next() { |
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if (!hasNext()) { |
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throw new NoSuchElementException(); |
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} |
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need2Read = true; |
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return nextBuffer; |
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} |
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} |
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static class InputStreamPublisher implements BodyPublisher { |
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private final Supplier<? extends InputStream> streamSupplier; |
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InputStreamPublisher(Supplier<? extends InputStream> streamSupplier) { |
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this.streamSupplier = streamSupplier; |
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} |
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@Override |
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public void subscribe(Flow.Subscriber<? super ByteBuffer> subscriber) { |
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55777
e62cbcc08cae
http-client-branch: Publisher/Subscriber/Subscription conformance fixes
chegar
parents:
55763
diff
changeset
|
332 |
PullPublisher<ByteBuffer> publisher; |
55763 | 333 |
InputStream is = streamSupplier.get(); |
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if (is == null) { |
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55777
e62cbcc08cae
http-client-branch: Publisher/Subscriber/Subscription conformance fixes
chegar
parents:
55763
diff
changeset
|
335 |
Throwable t = new IOException("streamSupplier returned null"); |
e62cbcc08cae
http-client-branch: Publisher/Subscriber/Subscription conformance fixes
chegar
parents:
55763
diff
changeset
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336 |
publisher = new PullPublisher<>(null, t); |
e62cbcc08cae
http-client-branch: Publisher/Subscriber/Subscription conformance fixes
chegar
parents:
55763
diff
changeset
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} else { |
e62cbcc08cae
http-client-branch: Publisher/Subscriber/Subscription conformance fixes
chegar
parents:
55763
diff
changeset
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publisher = new PullPublisher<>(iterableOf(is), null); |
55763 | 339 |
} |
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publisher.subscribe(subscriber); |
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} |
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protected Iterable<ByteBuffer> iterableOf(InputStream is) { |
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return () -> new StreamIterator(is); |
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} |
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@Override |
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public long contentLength() { |
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return -1; |
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} |
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} |
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} |