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Tomcat example source code file (CoyoteReader.java)

This example Tomcat source code file (CoyoteReader.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Tomcat tags/keywords

bufferedreader, clonenotsupportedexception, coyotereader, inputbuffer, io, ioexception, ioexception, line_sep, line_sep, max_line_length, max_line_length, object, string, string, stringbuffer

The Tomcat CoyoteReader.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.catalina.connector;

import java.io.BufferedReader;
import java.io.IOException;


/**
 * Coyote implementation of the buffred reader.
 * 
 * @author Remy Maucherat
 */
public class CoyoteReader
    extends BufferedReader {


    // -------------------------------------------------------------- Constants


    private static final char[] LINE_SEP = { '\r', '\n' };
    private static final int MAX_LINE_LENGTH = 4096;


    // ----------------------------------------------------- Instance Variables


    protected InputBuffer ib;


    protected char[] lineBuffer = null;


    // ----------------------------------------------------------- Constructors


    public CoyoteReader(InputBuffer ib) {
        super(ib, 1);
        this.ib = ib;
    }


    // --------------------------------------------------------- Public Methods


    /**
     * Prevent cloning the facade.
     */
    protected Object clone()
        throws CloneNotSupportedException {
        throw new CloneNotSupportedException();
    }


    // -------------------------------------------------------- Package Methods


    /**
     * Clear facade.
     */
    void clear() {
        ib = null;
    }


    // --------------------------------------------------------- Reader Methods


    public void close()
        throws IOException {
        ib.close();
    }


    public int read()
        throws IOException {
        return ib.read();
    }


    public int read(char[] cbuf)
        throws IOException {
        return ib.read(cbuf, 0, cbuf.length);
    }


    public int read(char[] cbuf, int off, int len)
        throws IOException {
        return ib.read(cbuf, off, len);
    }


    public long skip(long n)
        throws IOException {
        return ib.skip(n);
    }


    public boolean ready()
        throws IOException {
        return ib.ready();
    }


    public boolean markSupported() {
        return true;
    }


    public void mark(int readAheadLimit)
        throws IOException {
        ib.mark(readAheadLimit);
    }


    public void reset()
        throws IOException {
        ib.reset();
    }


    public String readLine()
        throws IOException {

        if (lineBuffer == null) {
            lineBuffer = new char[MAX_LINE_LENGTH];
       }

        String result = null;

        int pos = 0;
        int end = -1;
        int skip = -1;
        StringBuffer aggregator = null;
        while (end < 0) {
            mark(MAX_LINE_LENGTH);
            while ((pos < MAX_LINE_LENGTH) && (end < 0)) {
                int nRead = read(lineBuffer, pos, MAX_LINE_LENGTH - pos);
                if (nRead < 0) {
                    if (pos == 0) {
                        return null;
                    }
                    end = pos;
                    skip = pos;
                }
                for (int i = pos; (i < (pos + nRead)) && (end < 0); i++) {
                    if (lineBuffer[i] == LINE_SEP[0]) {
                        end = i;
                        skip = i + 1;
                        char nextchar;
                        if (i == (pos + nRead - 1)) {
                            nextchar = (char) read();
                        } else {
                            nextchar = lineBuffer[i+1];
                        }
                        if (nextchar == LINE_SEP[1]) {
                            skip++;
                        }
                    } else if (lineBuffer[i] == LINE_SEP[1]) {
                        end = i;
                        skip = i + 1;
                    }
                }
                if (nRead > 0) {
                    pos += nRead;
                }
            }
            if (end < 0) {
                if (aggregator == null) {
                    aggregator = new StringBuffer();
                }
                aggregator.append(lineBuffer);
                pos = 0;
            } else {
                reset();
                skip(skip);
            }
        }

        if (aggregator == null) {
            result = new String(lineBuffer, 0, end);
        } else {
            aggregator.append(lineBuffer, 0, end);
            result = aggregator.toString();
        }

        return result;

    }


}

Other Tomcat examples (source code examples)

Here is a short list of links related to this Tomcat CoyoteReader.java source code file:

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