01: /*
02: * Copyright (c) 1998-2001 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * Resin Open Source is free software; you can redistribute it and/or modify
10: * it under the terms of the GNU General Public License as published by
11: * the Free Software Foundation; either version 2 of the License, or
12: * (at your option) any later version.
13: *
14: * Resin Open Source is distributed in the hope that it will be useful,
15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17: * of NON-INFRINGEMENT. See the GNU General Public License for more
18: * details.
19: *
20: * You should have received a copy of the GNU General Public License
21: * along with Resin Open Source; if not, write to the
22: * Free SoftwareFoundation, Inc.
23: * 59 Temple Place, Suite 330
24: * Boston, MA 02111-1307 USA
25: *
26: * @author Scott Ferguson
27: *
28: * $Id: ServletInputStream.java,v 1.2 2004/09/29 00:12:46 cvs Exp $
29: */
30:
31: package javax.servlet;
32:
33: import java.io.IOException;
34: import java.io.InputStream;
35:
36: /**
37: * Servlets generally read POSTed data with ServletInputStream.
38: * ServletInputStream adds a readLine method to the standard InputStream
39: * API.
40: */
41: public abstract class ServletInputStream extends InputStream {
42: /**
43: * Reads a line from the POST data.
44: *
45: * @param buffer buffer to hold the line data
46: * @param offset offset into the buffer to start
47: * @param length maximum number of bytes to read.
48: *
49: * @return number of bytes read or -1 on the end of line.
50: */
51: public int readLine(byte[] buffer, int offset, int length)
52: throws IOException {
53: int i = 0;
54: for (i = 0; i < length; i++) {
55: int ch = read();
56: if (ch < 0)
57: return i == 0 ? -1 : i;
58:
59: buffer[offset + i] = (byte) ch;
60:
61: if (ch == '\n')
62: return i + 1;
63: }
64:
65: return i;
66: }
67: }
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