| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.hadoop.hdfs.web.http2; |
| |
| import java.io.IOException; |
| import java.util.Arrays; |
| |
| import org.eclipse.jetty.http.MetaData; |
| import org.eclipse.jetty.http.MetaData.Response; |
| import org.eclipse.jetty.http2.api.Stream; |
| import org.eclipse.jetty.http2.frames.DataFrame; |
| import org.eclipse.jetty.http2.frames.HeadersFrame; |
| import org.eclipse.jetty.http2.frames.ResetFrame; |
| import org.eclipse.jetty.util.Callback; |
| |
| public class StreamListener extends Stream.Listener.Adapter { |
| |
| private boolean finish = false; |
| |
| private byte[] buf = new byte[0]; |
| |
| private int status = -1; |
| |
| private boolean reset; |
| |
| @Override |
| public void onData(Stream stream, DataFrame frame, Callback callback) { |
| synchronized (this) { |
| if (reset) { |
| callback.failed(new IllegalStateException("Stream already closed")); |
| } |
| if (status == -1) { |
| callback |
| .failed(new IllegalStateException("Haven't received header yet")); |
| } |
| int bufLen = buf.length; |
| int newBufLen = bufLen + frame.getData().remaining(); |
| buf = Arrays.copyOf(buf, newBufLen); |
| frame.getData().get(buf, bufLen, frame.getData().remaining()); |
| if (frame.isEndStream()) { |
| finish = true; |
| } |
| notifyAll(); |
| callback.succeeded(); |
| } |
| } |
| |
| @Override |
| public void onHeaders(Stream stream, HeadersFrame frame) { |
| synchronized (this) { |
| if (reset) { |
| throw new IllegalStateException("Stream already closed"); |
| } |
| if (status != -1) { |
| throw new IllegalStateException("Header already received"); |
| } |
| MetaData meta = frame.getMetaData(); |
| if (!meta.isResponse()) { |
| throw new IllegalStateException("Received non-response header"); |
| } |
| status = ((Response) meta).getStatus(); |
| if (frame.isEndStream()) { |
| finish = true; |
| notifyAll(); |
| } |
| } |
| } |
| |
| @Override |
| public void onReset(Stream stream, ResetFrame frame) { |
| synchronized (this) { |
| reset = true; |
| finish = true; |
| notifyAll(); |
| } |
| } |
| |
| public int getStatus() throws InterruptedException, IOException { |
| synchronized (this) { |
| while (!finish) { |
| wait(); |
| } |
| if (reset) { |
| throw new IOException("Stream reset"); |
| } |
| return status; |
| } |
| } |
| |
| public byte[] getData() throws InterruptedException, IOException { |
| synchronized (this) { |
| while (!finish) { |
| wait(); |
| } |
| if (reset) { |
| throw new IOException("Stream reset"); |
| } |
| return buf; |
| } |
| } |
| } |