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  /*
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
   *
   * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
   *
   * The contents of this file are subject to the terms of either the GNU
   * General Public License Version 2 only ("GPL") or the Common Development
   * and Distribution License("CDDL") (collectively, the "License").  You
   * may not use this file except in compliance with the License.  You can
  * obtain a copy of the License at
  * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
  * or packager/legal/LICENSE.txt.  See the License for the specific
  * language governing permissions and limitations under the License.
  *
  * When distributing the software, include this License Header Notice in each
  * file and include the License file at packager/legal/LICENSE.txt.
  *
  * GPL Classpath Exception:
  * Oracle designates this particular file as subject to the "Classpath"
  * exception as provided by Oracle in the GPL Version 2 section of the License
  * file that accompanied this code.
  *
  * Modifications:
  * If applicable, add the following below the License Header, with the fields
  * enclosed by brackets [] replaced by your own identifying information:
  * "Portions Copyright [year] [name of copyright owner]"
  *
  * Contributor(s):
  * If you wish your version of this file to be governed by only the CDDL or
  * only the GPL Version 2, indicate your decision by adding "[Contributor]
  * elects to include this software in this distribution under the [CDDL or GPL
  * Version 2] license."  If you don't indicate a single choice of license, a
  * recipient has the option to distribute your version of this file under
  * either the CDDL, the GPL Version 2 or to extend the choice of license to
  * its licensees as provided above.  However, if you add GPL Version 2 code
  * and therefore, elected the GPL Version 2 license, then the option applies
  * only if the new code is made subject to such option by the copyright
  * holder.
  */
 
 /*
  *  Copyright 1999-2004 The Apache Software Foundation
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
  *  You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  *  Unless required by applicable law or agreed to in writing, software
  *  distributed under the License is distributed on an "AS IS" BASIS,
  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  *  See the License for the specific language governing permissions and
  *  limitations under the License.
  */
 package com.sun.enterprise.web.connector.grizzly.algorithms;
 
 
 
Predict if the NIO channel has been fully read or not. This lagorithm will first search for the content-length header, and use that value to determine if the bytes has been fully read or not. If the content-length isn't included, it will search for the end of the HTTP stream, which is a '\r\n' Note: the parsing algorithm is an adaptation of: org.apache.coyote.http11.InternalInputBuffer written by Remy Maucherat

Author(s):
Jean-Francois Arcand
 
 public class ContentLengthAlgorithm extends StreamAlgorithmBase{
          
     protected final static byte[] POST_METHOD = "post".getBytes();
     protected final static byte[] PUT_METHOD = "put".getBytes();
     
     protected final static byte[] CL_HEADER = "content-length".getBytes(); 
    
    
    
Pointer to the US-ASCII header buffer.
 
     public byte[] ascbuf = new byte[.];    

    
    
Last valid byte.
 
     protected int lastValid;


    
Position in the buffer.
    protected int pos;    

    
    
Is the content-length fully read.
    protected boolean isFound = false;   
    
    
    
Is the request line parsed?
    protected boolean requestLineParsed = false;   
    
    
    
The request bytes position.
    public int startReq = -1;
          
    
    
The request bytes length
    public int lengthReq = -1;
    
    // ---------------------------------------------- Constructor ----------/
    
    
    public ContentLengthAlgorithm() {
        if (){
             = new ContentLengthHandler(this);
        } else {
             = new DummyHandler();
        }
    }
    
 
    
Parse the ByteBuffer and try to determine if the bytes stream has been fully read from the SocketChannel. Drain the SocketChannel and determine if the request bytes has been fully read. For POST method, parse the bytes and seek for the content-type header to determine the length of the request bytes.

Returns:
true if the algorithm determines the end of the stream.
Paran:
byteBuffer the bytes read.
    public boolean parse(ByteBuffer byteBuffer){  
         = false;
         = byteBuffer.limit();
         = byteBuffer.position();
        // Rule a - if we know the content length, verify all bytes are read
        //          Return true only if all bytes has been read.
        if (  != -1 ){
             = 
                 (( + ) <= byteBuffer.position());
            if ()
               byteBuffer.flip();
            return ;
        }
       
        try{
            // Rule b - If nothing, return to the Selector.
            if (byteBuffer.position() == 0)
                return false;
                    
            byteBuffer.flip();
             = byteBuffer.limit();
            // Rule c - Parse the request line
            if ( ! ) {
                 = parseRequestLine(byteBuffer);
                if ( ! ) {
                    return false;
                }
            }
            // Rule d -- Parse the headers, looking for content-length
            while (parseHeader(byteBuffer));
            
            // Rule e - for POST/PUT, make sure all the body is loaded from
            //          the socket channel.
            if (  != -1 &&  ){
                 = (( + 
                                <= byteBuffer.limit());
            } else {
                // The content-length was found, but the headers
                // aren't yet bufferred entirely.
                 = false;
            }
           
            return ;
        } catch (BufferUnderflowException bue) {
            SelectorThread.logger().log(.,
                    "readTask.bufferunderflow"bue);
            return false;
        } finally {       
            byteBuffer.limit();
            byteBuffer.position();
            
            if (){
                byteBuffer.flip();
            }
        }         
    }
    
    
    
Parse the request line, looking for a POST method.
    protected boolean parseRequestLine(ByteBuffer byteBuffer){           
        int start = 0;
        byte chr = 0;
        
        if (  == 0 ){
            do {
                if ( >= )
                    return false;
                chr = byteBuffer.get(++);
            } while ((chr == .) || (chr == .));
            
             = 1;
            --;
            byteBuffer.position();
        }
            
        // Mark the current buffer position
        start = ;
        boolean space = false;
        if (  == 1 ) {
            while (!space) {
                if ( >= )
                    return false;
                byte c = byteBuffer.get();
                [] = c;
                if (c == .) {
                    space = true;
                    if ( ! && 
                            (findBytes(,start) == -1 
                             || findBytes(,start) == -1)){
                         = true;
                    }
                }
                ++;
            } 
             = 2;
        }
        // Mark the current buffer position
        start = ;
        int end = 0;
        space = false;
        boolean eol = false;    
        int questionPos = -1;
        if (  == 2 ){
            while (!space) {
                // Read new bytes if needed
                if ( >= )
                    return false;
                byte b = byteBuffer.get();
                [] = b;
                if ( b == .) {
                    space = true;
                    end = ;
                } else if ((b == .
                           || (b == .)) {
                    // HTTP/0.9 style request
                    eol = true;
                    space = true;
                    end = ;
                } else if ((b == .) && (questionPos == -1)){
                    questionPos = ;
                }
                ++;
            }
             = 3;
            
             = start;
            if (questionPos >= 0) {
                 = questionPos - start;
            } else {
                 = end - start;
            }
        }
        if (  == 3 ) {
            // Mark the current buffer position
            start = ;
            end = 0;
            while (!eol) {
                // Read new bytes if needed
                if ( >= )
                    return false;
                byte b = byteBuffer.get();
                if (b == .) {
                    end = ;
                } else if (b == .) {
                    if (end == 0)
                        end = ;
                    eol = true;
                }
                ++;
            }
             = 4;
        }
        return eol;
    }
    
    
    
Parse the headers, looking for content-length header and value.
    protected boolean parseHeader(ByteBuffer byteBuffer){
        boolean headerFound = false;
        byte chr = 0;
        
        if (  == 4 ){
            while (true) {
                // Read new bytes if needed
                if ( >= )
                    return false;
                chr = byteBuffer.get();
                if ((chr == .) || (chr == .)) {
                    if (chr == .) {
                        ++;   
                         = ;
                         = true;  
                         = 4;
                        return false;
                    }
                } else {
                    break;
                }
                ++;
            }
             = 5;
        }
        
        // Mark the current buffer position
        int start = ;
        if (  == 5 ){
            boolean colon = false;        
            while (!colon) {
                // Read new bytes if needed
                if ( >= )
                    return false;
                chr = byteBuffer.get();
                if (chr == .) {
                    colon = true;
                    if (  == -1
                         && findBytes(startstart + ( - start), 
                             ) != -1){
                        headerFound = true;
                    }
                }
                if ((chr >= .) && (chr <= .)) {
                    chr = (byte) (chr - .);
                }
                [] = chr;
                ++;
            }
             = 6;
        }
        
        // Mark the current buffer position
        start = ;
        int realPos = ;
        boolean eol = false;
        boolean validLine = true;
        while (validLine) {
            boolean space = true;
            if (  == 6 ){
                // Skipping spaces
                while (space) {
                    // Read new bytes if needed
                    if ( >= )
                        return false;
                    chr = byteBuffer.get();
                    if (( chr == .) || (chr == .)) {
                        ++;
                    } else {
                        space = false;
                    }                   
                } 
                 = 7;
            }
            
            int lastSignificantChar = realPos;
            // Reading bytes until the end of the line
            if (  == 7){
                while (!eol) {
                    // Read new bytes if needed
                    if ( >= )
                        return false;
                    chr = byteBuffer.get();
                    if (chr == .) {
                    } else if (chr == .) {
                        eol = true;
                    } else if (chr == .) {
                        realPos++;
                    } else {
                        realPos++;
                        lastSignificantChar = realPos;
                    }
                    ++;
                }
                 = 8;
                realPos = lastSignificantChar;
            }
            if (  == 8){
                // Read new bytes if needed
                if ( >= )
                    return false;
                chr = byteBuffer.get();
                if ((chr != .) && (chr != .)) {
                    validLine = false;
                } else {
                    eol = false;
                    realPos++;
                }  
                  = 4;
            }
        }
 
        if ( headerFound ){
            byteBuffer.position(start+1);
            StringBuilder sb = new StringBuilder();
            for(int i=0; i < realPos - starti++) {
                sb.append((charbyteBuffer.get());
            }
             = Integer.parseInt(sb.toString());
        }
        return true;
    }    
 
    
    
Compare two bytes array and return > 0 if true.
    protected int findBytes(byte[] buffint startint endbyte[] b) {
        byte first = b[0];
        // Look for first char 
        int srcEnd = b.length;
        for (int i = starti <= (end - srcEnd); i++) {
            if (Ascii.toLower(buff[i]) != firstcontinue;
            
            // found first char, now look for a match
            int myPos = i+1;
            for (int srcPos = 1; srcPos < srcEnd; ) {
                if (Ascii.toLower(buff[myPos++]) != b[srcPos++])
                    break;
                if (srcPos == srcEndreturn i - start// found it
            }
        }
        return -1;
    }    
      
    
    
Recylce this object.
    public void recycle(){
         = -1;
         = -1;
         = -1;
         = -1;
         = 0;
         = 0;
         = false;
         = false;
         = 0;
         = -1;
         = -1;
        
         = null;
        if (  != null){
            .attachChannel(null);
        }
    }
    
    
    
Return the Handler used by this algorithm.
    public Handler getHandler(){;
       return ;
    }
    
        
    
Return the class responsible for handling OP_READ.
    public Class getReadTask(SelectorThread selectorThread){
        return com.sun.enterprise.web.connector.grizzly.XAReadTask.class;
    }
    
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