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| 1 | /* | ||
| 2 | * Copyright (c) 2005, 2011, 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.net.httpserver; | ||
| 27 | |||
| 28 | import java.io.*; | ||
| 29 | import java.net.*; | ||
| 30 | import com.sun.net.httpserver.*; | ||
| 31 | import com.sun.net.httpserver.spi.*; | ||
| 32 | |||
| 33 | class ChunkedInputStream extends LeftOverInputStream { | ||
| 34 | ChunkedInputStream (ExchangeImpl t, InputStream src) { | ||
| 35 | super (t, src); | ||
| 36 | } | ||
| 37 | |||
| 38 | private int remaining; | ||
| 39 | |||
| 40 | /* true when a chunk header needs to be read */ | ||
| 41 | |||
| 42 | private boolean needToReadHeader = true; | ||
| 43 | |||
| 44 | static char CR = '\r'; | ||
| 45 | static char LF = '\n'; | ||
| 46 | |||
| 47 | private int numeric (char[] arr, int nchars) throws IOException { | ||
| 48 | assert arr.length >= nchars; | ||
| 49 | int len = 0; | ||
| 50 | for (int i=0; i<nchars; i++) { | ||
| 51 | char c = arr[i]; | ||
| 52 | int val=0; | ||
| 53 | if (c>='0' && c <='9') { | ||
| 54 | val = c - '0'; | ||
| 55 | } else if (c>='a' && c<= 'f') { | ||
| 56 | val = c - 'a' + 10; | ||
| 57 | } else if (c>='A' && c<= 'F') { | ||
| 58 | val = c - 'A' + 10; | ||
| 59 | } else { | ||
| 60 | throw new IOException ("invalid chunk length"); | ||
| 61 | } | ||
| 62 | len = len * 16 + val; | ||
| 63 | } | ||
| 64 | return len; | ||
| 65 | } | ||
| 66 | |||
| 67 | /* read the chunk header line and return the chunk length | ||
| 68 | * any chunk extensions are ignored | ||
| 69 | */ | ||
| 70 | private int readChunkHeader () throws IOException { | ||
| 71 | boolean gotCR = false; | ||
| 72 | int c; | ||
| 73 | char[] len_arr = new char [16]; | ||
| 74 | int len_size = 0; | ||
| 75 | boolean end_of_len = false; | ||
| 76 | |||
| 77 | while ((c=in.read())!= -1) { | ||
| 78 | char ch = (char) c; | ||
| 79 | if (len_size == len_arr.length -1) { | ||
| 80 | throw new IOException ("invalid chunk header"); | ||
| 81 | } | ||
| 82 | if (gotCR) { | ||
| 83 | if (ch == LF) { | ||
| 84 | int l = numeric (len_arr, len_size); | ||
| 85 | return l; | ||
| 86 | } else { | ||
| 87 | gotCR = false; | ||
| 88 | } | ||
| 89 | if (!end_of_len) { | ||
| 90 | len_arr[len_size++] = ch; | ||
| 91 | } | ||
| 92 | } else { | ||
| 93 | if (ch == CR) { | ||
| 94 | gotCR = true; | ||
| 95 | } else if (ch == ';') { | ||
| 96 | end_of_len = true; | ||
| 97 | } else if (!end_of_len) { | ||
| 98 | len_arr[len_size++] = ch; | ||
| 99 | } | ||
| 100 | } | ||
| 101 | } | ||
| 102 | throw new IOException ("end of stream reading chunk header"); | ||
| 103 | } | ||
| 104 | |||
| 105 | protected int readImpl (byte[]b, int off, int len) throws IOException { | ||
| 106 | if (eof) { | ||
| 107 | return -1; | ||
| 108 | } | ||
| 109 | if (needToReadHeader) { | ||
| 110 | remaining = readChunkHeader(); | ||
| 111 | if (remaining == 0) { | ||
| 112 | eof = true; | ||
| 113 | consumeCRLF(); | ||
| 114 | t.getServerImpl().requestCompleted (t.getConnection()); | ||
| 115 | return -1; | ||
| 116 | } | ||
| 117 | needToReadHeader = false; | ||
| 118 | } | ||
| 119 | if (len > remaining) { | ||
| 120 | len = remaining; | ||
| 121 | } | ||
| 122 | int n = in.read(b, off, len); | ||
| 123 | if (n > -1) { | ||
| 124 | remaining -= n; | ||
| 125 | } | ||
| 126 | if (remaining == 0) { | ||
| 127 | needToReadHeader = true; | ||
| 128 | consumeCRLF(); | ||
| 129 | } | ||
| 130 | return n; | ||
| 131 | } | ||
| 132 | |||
| 133 | private void consumeCRLF () throws IOException { | ||
| 134 | char c; | ||
| 135 | c = (char)in.read(); /* CR */ | ||
| 136 | if (c != CR) { | ||
| 137 | throw new IOException ("invalid chunk end"); | ||
| 138 | } | ||
| 139 | c = (char)in.read(); /* LF */ | ||
| 140 | if (c != LF) { | ||
| 141 | throw new IOException ("invalid chunk end"); | ||
| 142 | } | ||
| 143 | } | ||
| 144 | |||
| 145 | /** | ||
| 146 | * returns the number of bytes available to read in the current chunk | ||
| 147 | * which may be less than the real amount, but we'll live with that | ||
| 148 | * limitation for the moment. It only affects potential efficiency | ||
| 149 | * rather than correctness. | ||
| 150 | */ | ||
| 151 | public int available () throws IOException { | ||
| 152 | if (eof || closed) { | ||
| 153 | return 0; | ||
| 154 | } | ||
| 155 | int n = in.available(); | ||
| 156 | return n > remaining? remaining: n; | ||
| 157 | } | ||
| 158 | |||
| 159 | /* called after the stream is closed to see if bytes | ||
| 160 | * have been read from the underlying channel | ||
| 161 | * and buffered internally | ||
| 162 | */ | ||
| 163 | public boolean isDataBuffered () throws IOException { | ||
| 164 | assert eof; | ||
| 165 | return in.available() > 0; | ||
| 166 | } | ||
| 167 | |||
| 168 | public boolean markSupported () {return false;} | ||
| 169 | |||
| 170 | public void mark (int l) { | ||
| 171 | } | ||
| 172 | |||
| 173 | public void reset () throws IOException { | ||
| 174 | throw new IOException ("mark/reset not supported"); | ||
| 175 | } | ||
| 176 | } | ||