1 // 2 // ======================================================================== 3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. 4 // ------------------------------------------------------------------------ 5 // All rights reserved. This program and the accompanying materials 6 // are made available under the terms of the Eclipse Public License v1.0 7 // and Apache License v2.0 which accompanies this distribution. 8 // 9 // The Eclipse Public License is available at 10 // http://www.eclipse.org/legal/epl-v10.html 11 // 12 // The Apache License v2.0 is available at 13 // http://www.opensource.org/licenses/apache2.0.php 14 // 15 // You may elect to redistribute this code under either of these licenses. 16 // ======================================================================== 17 // 18 19 package org.eclipse.jetty.server; 20 21 import java.io.IOException; 22 import java.io.Writer; 23 24 import javax.servlet.ServletOutputStream; 25 26 import org.eclipse.jetty.http.AbstractGenerator; 27 import org.eclipse.jetty.http.Generator; 28 import org.eclipse.jetty.io.Buffer; 29 import org.eclipse.jetty.io.ByteArrayBuffer; 30 import org.eclipse.jetty.io.EofException; 31 import org.eclipse.jetty.util.ByteArrayOutputStream2; 32 33 /** Output. 34 * 35 * <p> 36 * Implements {@link javax.servlet.ServletOutputStream} from the <code>javax.servlet</code> package. 37 * </p> 38 * A {@link ServletOutputStream} implementation that writes content 39 * to a {@link AbstractGenerator}. The class is designed to be reused 40 * and can be reopened after a close. 41 */ 42 public class HttpOutput extends ServletOutputStream 43 { 44 protected final AbstractHttpConnection _connection; 45 protected final AbstractGenerator _generator; 46 private boolean _closed; 47 private ByteArrayBuffer _onebyte; 48 49 // These are held here for reuse by Writer 50 String _characterEncoding; 51 Writer _converter; 52 char[] _chars; 53 ByteArrayOutputStream2 _bytes; 54 55 /* ------------------------------------------------------------ */ HttpOutput(AbstractHttpConnection connection)56 public HttpOutput(AbstractHttpConnection connection) 57 { 58 _connection=connection; 59 _generator=(AbstractGenerator)connection.getGenerator(); 60 } 61 62 /* ------------------------------------------------------------ */ getMaxIdleTime()63 public int getMaxIdleTime() 64 { 65 return _connection.getMaxIdleTime(); 66 } 67 68 /* ------------------------------------------------------------ */ isWritten()69 public boolean isWritten() 70 { 71 return _generator.getContentWritten()>0; 72 } 73 74 /* ------------------------------------------------------------ */ 75 /* 76 * @see java.io.OutputStream#close() 77 */ 78 @Override close()79 public void close() throws IOException 80 { 81 _closed=true; 82 } 83 84 /* ------------------------------------------------------------ */ isClosed()85 public boolean isClosed() 86 { 87 return _closed; 88 } 89 90 /* ------------------------------------------------------------ */ reopen()91 public void reopen() 92 { 93 _closed=false; 94 } 95 96 /* ------------------------------------------------------------ */ 97 @Override flush()98 public void flush() throws IOException 99 { 100 _generator.flush(getMaxIdleTime()); 101 } 102 103 /* ------------------------------------------------------------ */ 104 @Override write(byte[] b, int off, int len)105 public void write(byte[] b, int off, int len) throws IOException 106 { 107 write(new ByteArrayBuffer(b,off,len)); 108 } 109 110 /* ------------------------------------------------------------ */ 111 /* 112 * @see java.io.OutputStream#write(byte[]) 113 */ 114 @Override write(byte[] b)115 public void write(byte[] b) throws IOException 116 { 117 write(new ByteArrayBuffer(b)); 118 } 119 120 121 /* ------------------------------------------------------------ */ 122 /* 123 * @see java.io.OutputStream#write(int) 124 */ 125 @Override write(int b)126 public void write(int b) throws IOException 127 { 128 if (_onebyte==null) 129 _onebyte=new ByteArrayBuffer(1); 130 else 131 _onebyte.clear(); 132 _onebyte.put((byte)b); 133 write(_onebyte); 134 } 135 136 /* ------------------------------------------------------------ */ write(Buffer buffer)137 private void write(Buffer buffer) throws IOException 138 { 139 if (_closed) 140 throw new IOException("Closed"); 141 if (!_generator.isOpen()) 142 throw new EofException(); 143 144 // Block until we can add _content. 145 while (_generator.isBufferFull()) 146 { 147 _generator.blockForOutput(getMaxIdleTime()); 148 if (_closed) 149 throw new IOException("Closed"); 150 if (!_generator.isOpen()) 151 throw new EofException(); 152 } 153 154 // Add the _content 155 _generator.addContent(buffer, Generator.MORE); 156 157 // Have to flush and complete headers? 158 159 if (_generator.isAllContentWritten()) 160 { 161 flush(); 162 close(); 163 } 164 else if (_generator.isBufferFull()) 165 _connection.commitResponse(Generator.MORE); 166 167 // Block until our buffer is free 168 while (buffer.length() > 0 && _generator.isOpen()) 169 { 170 _generator.blockForOutput(getMaxIdleTime()); 171 } 172 } 173 174 /* ------------------------------------------------------------ */ 175 /* 176 * @see javax.servlet.ServletOutputStream#print(java.lang.String) 177 */ 178 @Override print(String s)179 public void print(String s) throws IOException 180 { 181 write(s.getBytes()); 182 } 183 } 184