1 /* |
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2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package java.net.http; |
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27 |
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28 import java.io.IOException; |
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29 import java.nio.ByteBuffer; |
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30 |
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31 class PushPromiseFrame extends HeaderFrame { |
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32 |
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33 int padLength; |
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34 int promisedStream; |
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35 |
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36 PushPromiseFrame() { |
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37 type = TYPE; |
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38 } |
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39 |
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40 public static final int TYPE = 0x5; |
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41 |
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42 // Flags |
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43 public static final int END_HEADERS = 0x4; |
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44 public static final int PADDED = 0x8; |
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45 |
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46 @Override |
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47 public String toString() { |
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48 return super.toString() + " promisedStreamid: " + promisedStream |
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49 + " headerLength: " + headerLength; |
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50 } |
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51 |
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52 @Override |
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53 String flagAsString(int flag) { |
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54 switch (flag) { |
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55 case PADDED: |
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56 return "PADDED"; |
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57 case END_HEADERS: |
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58 return "END_HEADERS"; |
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59 } |
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60 return super.flagAsString(flag); |
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61 } |
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62 |
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63 public void setPadLength(int padLength) { |
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64 this.padLength = padLength; |
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65 flags |= PADDED; |
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66 } |
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67 |
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68 public void setPromisedStream(int stream) { |
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69 this.promisedStream = stream; |
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70 } |
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71 |
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72 public int getPromisedStream() { |
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73 return promisedStream; |
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74 } |
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75 |
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76 /** |
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77 */ |
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78 @Override |
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79 void readIncomingImpl(ByteBufferConsumer bc) throws IOException { |
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80 if ((flags & PADDED) != 0) { |
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81 padLength = bc.getByte(); |
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82 headerLength = length - (padLength + 5); |
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83 } else |
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84 headerLength = length - 4; |
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85 |
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86 promisedStream = bc.getInt() & 0x7fffffff; |
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87 headerBlocks = bc.getBuffers(headerLength); |
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88 } |
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89 |
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90 @Override |
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91 void computeLength() { |
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92 int len = 0; |
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93 if ((flags & PADDED) != 0) { |
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94 len += (1 + padLength); |
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95 } |
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96 len += (4 + headerLength); |
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97 this.length = len; |
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98 } |
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99 |
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100 @Override |
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101 void writeOutgoing(ByteBufferGenerator bg) { |
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102 super.writeOutgoing(bg); |
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103 ByteBuffer buf = bg.getBuffer(length); |
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104 if ((flags & PADDED) != 0) { |
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105 buf.put((byte)padLength); |
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106 } |
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107 buf.putInt(promisedStream); |
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108 for (int i=0; i<headerBlocks.length; i++) { |
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109 bg.addByteBuffer(headerBlocks[i]); |
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110 } |
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111 if ((flags & PADDED) != 0) { |
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112 bg.addPadding(padLength); |
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113 } |
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114 } |
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115 |
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116 @Override |
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117 public boolean endHeaders() { |
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118 return getFlag(END_HEADERS); |
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119 } |
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120 } |
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