1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 import java.io.*; 25 import java.nio.ByteBuffer; 26 27 import jdk.incubator.http.internal.common.ByteBufferReference; 28 import jdk.incubator.http.internal.common.Queue; 29 import jdk.incubator.http.internal.common.Utils; 30 import jdk.incubator.http.internal.frame.DataFrame; 31 import jdk.incubator.http.internal.frame.Http2Frame; 32 import jdk.incubator.http.internal.frame.ResetFrame; 33 34 /** 35 * InputStream reads frames off stream q and supplies read demand from any 36 * DataFrames it finds. Window updates are sent back on the connections send 37 * q. 38 */ 39 class BodyInputStream extends InputStream { 40 41 final Queue<Http2Frame> q; 42 final int streamid; 43 boolean closed; 44 boolean eof; 45 final Http2TestServerConnection conn; 46 47 @SuppressWarnings({"rawtypes","unchecked"}) 48 BodyInputStream(Queue q, int streamid, Http2TestServerConnection conn) { 49 this.q = q; 50 this.streamid = streamid; 51 this.conn = conn; 52 } 53 54 DataFrame df; 55 ByteBuffer[] buffers; 56 ByteBuffer buffer; 57 int nextIndex = -1; 58 59 private DataFrame getData() throws IOException { 60 if (eof) { 61 return null; 62 } 63 Http2Frame frame; 64 do { 65 frame = q.take(); 66 if (frame.type() == ResetFrame.TYPE) { 67 conn.handleStreamReset((ResetFrame) frame); // throws IOException 68 } 69 // ignoring others for now Wupdates handled elsewhere 70 if (frame.type() != DataFrame.TYPE) { 71 System.out.println("Ignoring " + frame.toString() + " CHECK THIS"); 72 } 73 } while (frame.type() != DataFrame.TYPE); 74 df = (DataFrame) frame; 75 int len = df.payloadLength(); 76 eof = frame.getFlag(DataFrame.END_STREAM); 77 // acknowledge 78 conn.sendWindowUpdates(len, streamid); 79 return (DataFrame) frame; 80 } 81 82 // null return means EOF 83 private ByteBuffer getBuffer() throws IOException { 84 if (buffer == null || !buffer.hasRemaining()) { 85 if (nextIndex == -1 || nextIndex == buffers.length) { 86 DataFrame df = getData(); 87 if (df == null) { 88 return null; 89 } 90 ByteBufferReference[] data = df.getData(); 91 int len = Utils.remaining(data); 92 if ((len == 0) && eof) { 93 return null; 94 } 95 96 buffers = ByteBufferReference.toBuffers(data); 97 nextIndex = 0; 98 } 99 buffer = buffers[nextIndex++]; 100 } 101 return buffer; 102 } 103 104 @Override 105 public int read(byte[] buf, int offset, int length) throws IOException { 106 if (closed) { 107 throw new IOException("closed"); 108 } 109 ByteBuffer b = getBuffer(); 110 if (b == null) { 111 return -1; 112 } 113 int remaining = b.remaining(); 114 if (remaining < length) { 115 length = remaining; 116 } 117 b.get(buf, offset, length); 118 return length; 119 } 120 121 byte[] one = new byte[1]; 122 123 @Override 124 public int read() throws IOException { 125 int c = read(one, 0, 1); 126 if (c == -1) { 127 return -1; 128 } 129 return one[0]; 130 } 131 132 @Override 133 public void close() { 134 // TODO reset this stream 135 closed = true; 136 } 137 }