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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 | +} | |