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1: /* 2: * ByteArrayResponseBodyReader.java 3: * Copyright (C) 2004 The Free Software Foundation 4: * 5: * This file is part of GNU inetlib, a library. 6: * 7: * GNU inetlib is free software; you can redistribute it and/or modify 8: * it under the terms of the GNU General Public License as published by 9: * the Free Software Foundation; either version 2 of the License, or 10: * (at your option) any later version. 11: * 12: * GNU inetlib is distributed in the hope that it will be useful, 13: * but WITHOUT ANY WARRANTY; without even the implied warranty of 14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15: * GNU General Public License for more details. 16: * 17: * You should have received a copy of the GNU General Public License 18: * along with this library; if not, write to the Free Software 19: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20: * 21: * Linking this library statically or dynamically with other modules is 22: * making a combined work based on this library. Thus, the terms and 23: * conditions of the GNU General Public License cover the whole 24: * combination. 25: * 26: * As a special exception, the copyright holders of this library give you 27: * permission to link this library with independent modules to produce an 28: * executable, regardless of the license terms of these independent 29: * modules, and to copy and distribute the resulting executable under 30: * terms of your choice, provided that you also meet, for each linked 31: * independent module, the terms and conditions of the license of that 32: * module. An independent module is a module which is not derived from 33: * or based on this library. If you modify this library, you may extend 34: * this exception to your version of the library, but you are not 35: * obliged to do so. If you do not wish to do so, delete this 36: * exception statement from your version. 37: */ 38: 39: package gnu.inet.http; 40: 41: /** 42: * Simple response body reader that stores content in a byte array. 43: * 44: * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> 45: */ 46: public class ByteArrayResponseBodyReader 47: implements ResponseBodyReader 48: { 49: 50: /** 51: * The content. 52: */ 53: protected byte[] content; 54: 55: /** 56: * The position in the content at which the next write will occur. 57: */ 58: protected int pos; 59: 60: /** 61: * The length of the buffer. 62: */ 63: protected int len; 64: 65: /** 66: * Constructs a new byte array response body reader. 67: */ 68: public ByteArrayResponseBodyReader() 69: { 70: this(4096); 71: } 72: 73: /** 74: * Constructs a new byte array response body reader with the specified 75: * initial buffer size. 76: * @param size the initial buffer size 77: */ 78: public ByteArrayResponseBodyReader(int size) 79: { 80: content = new byte[size]; 81: pos = len = 0; 82: } 83: 84: /** 85: * This reader accepts all responses. 86: */ 87: public boolean accept(Request request, Response response) 88: { 89: return true; 90: } 91: 92: public void read(byte[] buffer, int offset, int length) 93: { 94: int l = length - offset; 95: if (pos + l > content.length) 96: { 97: byte[] tmp = new byte[content.length * 2]; 98: System.arraycopy(content, 0, tmp, 0, pos); 99: content = tmp; 100: } 101: System.arraycopy(buffer, offset, content, pos, l); 102: pos += l; 103: len = pos; 104: } 105: 106: public void close() 107: { 108: pos = 0; 109: } 110: 111: /** 112: * Retrieves the content of this reader as a byte array. 113: * The size of the returned array is the number of bytes read. 114: */ 115: public byte[] toByteArray() 116: { 117: byte[] ret = new byte[len]; 118: System.arraycopy(content, 0, ret, 0, len); 119: return ret; 120: } 121: 122: }