Source Code Cross Referenced for HttpRequestStream.java in  » Web-Server » Rimfaxe-Web-Server » org » apache » catalina » connector » http » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Server » Rimfaxe Web Server » org.apache.catalina.connector.http 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * $Header: /home/cvs/jakarta-tomcat-4.0/catalina/src/share/org/apache/catalina/connector/http/HttpRequestStream.java,v 1.11 2002/03/18 07:15:40 remm Exp $
003:         * $Revision: 1.11 $
004:         * $Date: 2002/03/18 07:15:40 $
005:         *
006:         * ====================================================================
007:         *
008:         * The Apache Software License, Version 1.1
009:         *
010:         * Copyright (c) 1999 The Apache Software Foundation.  All rights
011:         * reserved.
012:         *
013:         * Redistribution and use in source and binary forms, with or without
014:         * modification, are permitted provided that the following conditions
015:         * are met:
016:         *
017:         * 1. Redistributions of source code must retain the above copyright
018:         *    notice, this list of conditions and the following disclaimer.
019:         *
020:         * 2. Redistributions in binary form must reproduce the above copyright
021:         *    notice, this list of conditions and the following disclaimer in
022:         *    the documentation and/or other materials provided with the
023:         *    distribution.
024:         *
025:         * 3. The end-user documentation included with the redistribution, if
026:         *    any, must include the following acknowlegement:
027:         *       "This product includes software developed by the
028:         *        Apache Software Foundation (http://www.apache.org/)."
029:         *    Alternately, this acknowlegement may appear in the software itself,
030:         *    if and wherever such third-party acknowlegements normally appear.
031:         *
032:         * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
033:         *    Foundation" must not be used to endorse or promote products derived
034:         *    from this software without prior written permission. For written
035:         *    permission, please contact apache@apache.org.
036:         *
037:         * 5. Products derived from this software may not be called "Apache"
038:         *    nor may "Apache" appear in their names without prior written
039:         *    permission of the Apache Group.
040:         *
041:         * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
042:         * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
043:         * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
044:         * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
045:         * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
046:         * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
047:         * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
048:         * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
049:         * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
050:         * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
051:         * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
052:         * SUCH DAMAGE.
053:         * ====================================================================
054:         *
055:         * This software consists of voluntary contributions made by many
056:         * individuals on behalf of the Apache Software Foundation.  For more
057:         * information on the Apache Software Foundation, please see
058:         * <http://www.apache.org/>.
059:         *
060:         * [Additional notices, if required by prior licensing conditions]
061:         *
062:         */
063:
064:        package org.apache.catalina.connector.http;
065:
066:        import java.io.IOException;
067:        import org.apache.catalina.Request;
068:        import org.apache.catalina.connector.RequestStream;
069:
070:        /**
071:         *
072:         *
073:         * @author <a href="mailto:remm@apache.org">Remy Maucherat</a>
074:         * @deprecated
075:         */
076:        public class HttpRequestStream extends RequestStream {
077:
078:            // ----------------------------------------------------------- Constructors
079:
080:            /**
081:             * Construct a servlet input stream associated with the specified Request.
082:             *
083:             * @param request The associated request
084:             * @param response The associated response
085:             */
086:            public HttpRequestStream(HttpRequestImpl request,
087:                    HttpResponseImpl response) {
088:
089:                super (request);
090:                String transferEncoding = request
091:                        .getHeader("Transfer-Encoding");
092:
093:                http11 = request.getProtocol().equals("HTTP/1.1");
094:                chunk = ((transferEncoding != null) && (transferEncoding
095:                        .indexOf("chunked") != -1));
096:
097:                if ((!chunk) && (length == -1)) {
098:                    // Ask for connection close
099:                    response.addHeader("Connection", "close");
100:                }
101:
102:            }
103:
104:            // ----------------------------------------------------- Instance Variables
105:
106:            /**
107:             * Use chunking ?
108:             */
109:            protected boolean chunk = false;
110:
111:            /**
112:             * True if the final chunk was found.
113:             */
114:            protected boolean endChunk = false;
115:
116:            /**
117:             * Chunk buffer.
118:             */
119:            protected byte[] chunkBuffer = null;
120:
121:            /**
122:             * Chunk length.
123:             */
124:            protected int chunkLength = 0;
125:
126:            /**
127:             * Chunk buffer position.
128:             */
129:            protected int chunkPos = 0;
130:
131:            /**
132:             * HTTP/1.1 flag.
133:             */
134:            protected boolean http11 = false;
135:
136:            // --------------------------------------------------------- Public Methods
137:
138:            /**
139:             * Close this input stream.  No physical level I-O is performed, but
140:             * any further attempt to read from this stream will throw an IOException.
141:             * If a content length has been set but not all of the bytes have yet been
142:             * consumed, the remaining bytes will be swallowed.
143:             */
144:            public void close() throws IOException {
145:
146:                if (closed)
147:                    throw new IOException(sm
148:                            .getString("requestStream.close.closed"));
149:
150:                if (chunk) {
151:
152:                    while (!endChunk) {
153:                        int b = read();
154:                        if (b < 0)
155:                            break;
156:                    }
157:
158:                } else {
159:
160:                    if (http11 && (length > 0)) {
161:                        while (count < length) {
162:                            int b = read();
163:                            if (b < 0)
164:                                break;
165:                        }
166:                    }
167:
168:                }
169:
170:                closed = true;
171:
172:            }
173:
174:            /**
175:             * Read and return a single byte from this input stream, or -1 if end of
176:             * file has been encountered.
177:             *
178:             * @exception IOException if an input/output error occurs
179:             */
180:            public int read() throws IOException {
181:
182:                // Has this stream been closed?
183:                if (closed)
184:                    throw new IOException(sm
185:                            .getString("requestStream.read.closed"));
186:
187:                if (chunk) {
188:
189:                    if (endChunk)
190:                        return (-1);
191:
192:                    if ((chunkBuffer == null) || (chunkPos >= chunkLength)) {
193:                        if (!fillChunkBuffer())
194:                            return (-1);
195:                    }
196:
197:                    return (chunkBuffer[chunkPos++] & 0xff);
198:
199:                } else {
200:
201:                    return (super .read());
202:
203:                }
204:
205:            }
206:
207:            /**
208:             * Read up to <code>len</code> bytes of data from the input stream
209:             * into an array of bytes.  An attempt is made to read as many as
210:             * <code>len</code> bytes, but a smaller number may be read,
211:             * possibly zero.  The number of bytes actually read is returned as
212:             * an integer.  This method blocks until input data is available,
213:             * end of file is detected, or an exception is thrown.
214:             *
215:             * @param b The buffer into which the data is read
216:             * @param off The start offset into array <code>b</code> at which
217:             *  the data is written
218:             * @param len The maximum number of bytes to read
219:             *
220:             * @exception IOException if an input/output error occurs
221:             */
222:            public int read(byte b[], int off, int len) throws IOException {
223:                if (chunk) {
224:
225:                    int avail = chunkLength - chunkPos;
226:                    if (avail == 0)
227:                        fillChunkBuffer();
228:                    avail = chunkLength - chunkPos;
229:                    if (avail == 0)
230:                        return (-1);
231:
232:                    int toCopy = avail;
233:                    if (avail > len)
234:                        toCopy = len;
235:                    System.arraycopy(chunkBuffer, chunkPos, b, off, toCopy);
236:                    chunkPos += toCopy;
237:                    return toCopy;
238:
239:                } else {
240:                    return super .read(b, off, len);
241:                }
242:            }
243:
244:            // -------------------------------------------------------- Private Methods
245:
246:            /**
247:             * Fill the chunk buffer.
248:             */
249:            private synchronized boolean fillChunkBuffer() throws IOException {
250:
251:                chunkPos = 0;
252:
253:                try {
254:                    String numberValue = readLineFromStream();
255:                    if (numberValue != null)
256:                        numberValue = numberValue.trim();
257:                    chunkLength = Integer.parseInt(numberValue, 16);
258:                } catch (NumberFormatException e) {
259:                    // Critical error, unable to parse the chunk length
260:                    chunkLength = 0;
261:                    chunk = false;
262:                    close();
263:                    return false;
264:                }
265:
266:                if (chunkLength == 0) {
267:
268:                    // Skipping trailing headers, if any
269:                    String trailingLine = readLineFromStream();
270:                    while (!trailingLine.equals(""))
271:                        trailingLine = readLineFromStream();
272:                    endChunk = true;
273:                    return false;
274:                    // TODO : Should the stream be automatically closed ?
275:
276:                } else {
277:
278:                    if ((chunkBuffer == null)
279:                            || (chunkLength > chunkBuffer.length))
280:                        chunkBuffer = new byte[chunkLength];
281:
282:                    // Now read the whole chunk into the buffer
283:
284:                    int nbRead = 0;
285:                    int currentRead = 0;
286:
287:                    while (nbRead < chunkLength) {
288:                        try {
289:                            currentRead = stream.read(chunkBuffer, nbRead,
290:                                    chunkLength - nbRead);
291:                        } catch (Throwable t) {
292:                            t.printStackTrace();
293:                            throw new IOException();
294:                        }
295:                        if (currentRead < 0) {
296:                            throw new IOException(sm
297:                                    .getString("requestStream.read.error"));
298:                        }
299:                        nbRead += currentRead;
300:                    }
301:
302:                    // Skipping the CRLF
303:                    String blank = readLineFromStream();
304:
305:                }
306:
307:                return true;
308:
309:            }
310:
311:            /**
312:             * Reads the input stream, one line at a time. Reads bytes into an array,
313:             * until it reads a certain number of bytes or reaches a newline character,
314:             * which it reads into the array as well.
315:             *
316:             * @param input Input stream on which the bytes are read
317:             * @return The line that was read, or <code>null</code> if end-of-file
318:             *  was encountered
319:             * @exception IOException   if an input or output exception has occurred
320:             */
321:            private String readLineFromStream() throws IOException {
322:
323:                StringBuffer sb = new StringBuffer();
324:                while (true) {
325:                    int ch = super .read();
326:                    if (ch < 0) {
327:                        if (sb.length() == 0) {
328:                            return (null);
329:                        } else {
330:                            break;
331:                        }
332:                    } else if (ch == '\r') {
333:                        continue;
334:                    } else if (ch == '\n') {
335:                        break;
336:                    }
337:                    sb.append((char) ch);
338:                }
339:                return (sb.toString());
340:
341:            }
342:
343:        }
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