author | ohair |
Wed, 06 Apr 2011 22:06:11 -0700 | |
changeset 9035 | 1255eb81cc2f |
parent 8541 | 75bedadddefa |
child 16081 | 452341da6f0b |
permissions | -rw-r--r-- |
2 | 1 |
/* |
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7033660: Update copyright year to 2011 on any files changed in 2011
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* Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.net.httpserver; |
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import java.io.*; |
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import java.net.*; |
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import com.sun.net.httpserver.*; |
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import com.sun.net.httpserver.spi.*; |
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class ChunkedInputStream extends LeftOverInputStream { |
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ChunkedInputStream (ExchangeImpl t, InputStream src) { |
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super (t, src); |
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} |
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private int remaining; |
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/* true when a chunk header needs to be read */ |
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private boolean needToReadHeader = true; |
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static char CR = '\r'; |
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static char LF = '\n'; |
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private int numeric (char[] arr, int nchars) throws IOException { |
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assert arr.length >= nchars; |
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int len = 0; |
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for (int i=0; i<nchars; i++) { |
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char c = arr[i]; |
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int val=0; |
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if (c>='0' && c <='9') { |
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val = c - '0'; |
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} else if (c>='a' && c<= 'f') { |
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val = c - 'a' + 10; |
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} else if (c>='A' && c<= 'F') { |
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val = c - 'A' + 10; |
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} else { |
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throw new IOException ("invalid chunk length"); |
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} |
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len = len * 16 + val; |
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} |
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return len; |
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} |
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/* read the chunk header line and return the chunk length |
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* any chunk extensions are ignored |
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*/ |
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private int readChunkHeader () throws IOException { |
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boolean gotCR = false; |
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int c; |
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char[] len_arr = new char [16]; |
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int len_size = 0; |
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boolean end_of_len = false; |
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while ((c=in.read())!= -1) { |
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char ch = (char) c; |
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if (len_size == len_arr.length -1) { |
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throw new IOException ("invalid chunk header"); |
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} |
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if (gotCR) { |
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if (ch == LF) { |
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int l = numeric (len_arr, len_size); |
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return l; |
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} else { |
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gotCR = false; |
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} |
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if (!end_of_len) { |
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len_arr[len_size++] = ch; |
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} |
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} else { |
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if (ch == CR) { |
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gotCR = true; |
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} else if (ch == ';') { |
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end_of_len = true; |
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} else if (!end_of_len) { |
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len_arr[len_size++] = ch; |
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} |
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} |
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} |
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throw new IOException ("end of stream reading chunk header"); |
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} |
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protected int readImpl (byte[]b, int off, int len) throws IOException { |
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if (eof) { |
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return -1; |
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} |
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if (needToReadHeader) { |
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remaining = readChunkHeader(); |
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if (remaining == 0) { |
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eof = true; |
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consumeCRLF(); |
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t.getServerImpl().requestCompleted (t.getConnection()); |
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return -1; |
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} |
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needToReadHeader = false; |
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} |
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if (len > remaining) { |
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len = remaining; |
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} |
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int n = in.read(b, off, len); |
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if (n > -1) { |
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remaining -= n; |
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} |
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if (remaining == 0) { |
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needToReadHeader = true; |
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consumeCRLF(); |
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} |
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return n; |
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} |
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private void consumeCRLF () throws IOException { |
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char c; |
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c = (char)in.read(); /* CR */ |
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if (c != CR) { |
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throw new IOException ("invalid chunk end"); |
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} |
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c = (char)in.read(); /* LF */ |
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if (c != LF) { |
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throw new IOException ("invalid chunk end"); |
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} |
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} |
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/** |
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* returns the number of bytes available to read in the current chunk |
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* which may be less than the real amount, but we'll live with that |
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* limitation for the moment. It only affects potential efficiency |
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* rather than correctness. |
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*/ |
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public int available () throws IOException { |
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if (eof || closed) { |
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return 0; |
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} |
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int n = in.available(); |
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return n > remaining? remaining: n; |
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} |
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/* called after the stream is closed to see if bytes |
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* have been read from the underlying channel |
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* and buffered internally |
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*/ |
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public boolean isDataBuffered () throws IOException { |
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assert eof; |
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return in.available() > 0; |
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} |
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public boolean markSupported () {return false;} |
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public void mark (int l) { |
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} |
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public void reset () throws IOException { |
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throw new IOException ("mark/reset not supported"); |
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} |
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} |