amyroh 01/03/21 13:53:16
Added: webapps/examples/WEB-INF/classes/compressionFilters
CompressionServletResponseWrapper.java
CompressionResponseStream.java
CompressionFilterTestServlet.java
CompressionFilter.java
Log:
Compression Filter Example
Revision Changes Path
1.1
jakarta-tomcat-4.0/webapps/examples/WEB-INF/classes/compressionFilters/CompressionServletResponseWrapper.java
Index: CompressionServletResponseWrapper.java
===================================================================
/*
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* [Additional notices, if required by prior licensing conditions]
*
*/
package compressionFilters;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.Locale;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.ServletResponse;
import javax.servlet.ServletResponseWrapper;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
public class CompressionServletResponseWrapper extends HttpServletResponseWrapper {
// ----------------------------------------------------- Constructor
/**
* Calls the parent constructor which creates a ServletResponse adaptor
* wrapping the given response object.
*/
public CompressionServletResponseWrapper(HttpServletResponse response) {
super(response);
origResponse = response;
//System.out.println("CompressionServletResponseWrapper constructor gets
called");
}
// ----------------------------------------------------- Instance Variables
/**
* Original response
*/
protected HttpServletResponse origResponse = null;
/**
* Descriptive information about this Response implementation.
*/
protected static final String info = "CompressionServletResponseWrapper";
/**
* The ServletOutputStream that has been returned by
* <code>getOutputStream()</code>, if any.
*/
protected ServletOutputStream stream = null;
/**
* The PrintWriter that has been returned by
* <code>getWriter()</code>, if any.
*/
protected PrintWriter writer = null;
/**
* The threshold number to compress
*/
protected int threshold = 0;
// --------------------------------------------------------- Public Methods
/**
* Set threshold number
*/
public void setCompressionThreshold(int threshold) {
//System.out.println("setCompressionThreshold @
CompressionServletResponseWrapper");
this.threshold = threshold;
}
/**
* Create and return a ServletOutputStream to write the content
* associated with this Response.
*
* @exception IOException if an input/output error occurs
*/
public ServletOutputStream createOutputStream() throws IOException {
//System.out.println("createOutputStream gets called");
return (new CompressionResponseStream(origResponse));
}
// ------------------------------------------------ ServletResponse Methods
/**
* Flush the buffer and commit this response.
*
* @exception IOException if an input/output error occurs
*/
public void flushBuffer() throws IOException {
// System.out.println("flush buffer @ CompressionServletResponseWrapper");
((CompressionResponseStream)stream).flush();
}
/**
* Return the servlet output stream associated with this Response.
*
* @exception IllegalStateException if <code>getWriter</code> has
* already been called for this response
* @exception IOException if an input/output error occurs
*/
public ServletOutputStream getOutputStream() throws IOException {
if (writer != null)
throw new IllegalStateException("getWriter() has already been called for
this response");
if (stream == null)
stream = createOutputStream();
//System.out.println("stream is set to "+stream+" in getOutputStream");
((CompressionResponseStream) stream).setCommit(true);
((CompressionResponseStream) stream).setBuffer(threshold);
return (stream);
}
/**
* Return the writer associated with this Response.
*
* @exception IllegalStateException if <code>getOutputStream</code> has
* already been called for this response
* @exception IOException if an input/output error occurs
*/
public PrintWriter getWriter() throws IOException {
if (writer != null)
return (writer);
if (stream != null)
throw new IllegalStateException("getOutputStream() has already been
called for this response");
stream = createOutputStream();
//System.out.println("strean is set to "+stream+" in getWriter");
((CompressionResponseStream) stream).setCommit(true);
((CompressionResponseStream) stream).setBuffer(threshold);
writer = new PrintWriter(stream);
return (writer);
}
}
1.1
jakarta-tomcat-4.0/webapps/examples/WEB-INF/classes/compressionFilters/CompressionResponseStream.java
Index: CompressionResponseStream.java
===================================================================
/*
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* [Additional notices, if required by prior licensing conditions]
*
*/
package compressionFilters;
import java.io.IOException;
import java.io.OutputStream;
import java.util.zip.GZIPOutputStream;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
/**
* Implementation of <b>ServletOutputStream</b> that works with
* the CompressionServletResponseWrapper implementation.
*
* @author Amy Roh
*/
public class CompressionResponseStream
extends ServletOutputStream {
// ----------------------------------------------------------- Constructors
/**
* Construct a servlet output stream associated with the specified Response.
*
* @param response The associated response
*/
public CompressionResponseStream(HttpServletResponse response) throws
IOException{
super();
closed = false;
commit = false;
count = 0;
this.response = response;
this.output = response.getOutputStream();
}
// ----------------------------------------------------- Instance Variables
/**
* The threshold number which decides to compress or not.
* Users can configure in web.xml to set it to fit their needs.
*/
protected int compressionThreshold = 0;
/**
* The buffer through which all of our output bytes are passed.
*/
protected byte[] buffer = null;
/**
* Is it big enough to compress?
*/
protected boolean compressionThresholdReached = false;
/**
* The number of data bytes currently in the buffer.
*/
protected int bufferCount = 0;
/**
* The underlying gzip output stream to which we should write data.
*/
protected GZIPOutputStream gzipstream = null;
/**
* Has this stream been closed?
*/
protected boolean closed = false;
/**
* Should we commit the response when we are flushed?
*/
protected boolean commit = true;
/**
* The number of bytes which have already been written to this stream.
*/
protected int count = 0;
/**
* The content length past which we will not write, or -1 if there is
* no defined content length.
*/
protected int length = -1;
/**
* The response with which this servlet output stream is associated.
*/
protected HttpServletResponse response = null;
/**
* The underlying servket output stream to which we should write data.
*/
protected ServletOutputStream output = null;
// ------------------------------------------------------------- Properties
/**
* [Package Private] Return the "commit response on flush" flag.
*/
boolean getCommit() {
return (this.commit);
}
/**
* [Package Private] Set the "commit response on flush" flag.
*
* @param commit The new commit flag
*/
void setCommit(boolean commit) {
this.commit = commit;
}
// --------------------------------------------------------- Public Methods
/**
* Set the compressionThreshold number and create buffer for this size
*/
protected void setBuffer(int threshold) {
compressionThreshold = threshold;
buffer = new byte[compressionThreshold];
//System.out.println("buffer is set to "+compressionThreshold);
}
/**
* Close this output stream, causing any buffered data to be flushed and
* any further output data to throw an IOException.
*/
public void close() throws IOException {
if (closed)
throw new IOException("This output stream has already been closed");
if (gzipstream!=null) {
gzipstream.close();
}
flush();
closed = true;
}
/**
* Flush any buffered data for this output stream, which also causes the
* response to be committed.
*/
public void flush() throws IOException {
//System.out.println("flush() @ CompressionResponseStream");
if (closed)
throw new IOException("Cannot flush a closed output stream");
if (commit) {
if (bufferCount > 0) {
//System.out.println("writing to original stream");
output.write(buffer, 0, bufferCount);
bufferCount = 0;
}
} else {
//System.out.println("commit false");
}
}
public void flushToGZip() throws IOException {
//System.out.println("flushToGZip() @ CompressionResponseStream");
if (bufferCount > 0) {
//System.out.println("flushing out to GZipStream");
gzipstream.write(buffer, 0, bufferCount);
bufferCount = 0;
}
}
/**
* Write the specified byte to our output stream.
*
* @param b The byte to be written
*
* @exception IOException if an input/output error occurs
*/
public void write(int b) throws IOException {
//System.out.print("write "+b+" in CompressionResponseStream ");
if (closed)
throw new IOException("Cannot write to a closed output stream");
if ((bufferCount >= buffer.length) || (count>=compressionThreshold)) {
compressionThresholdReached = true;
}
if (compressionThresholdReached) {
writeToGZip(b);
} else {
buffer[bufferCount++] = (byte) b;
count++;
}
}
/**
* Write the specified byte to our compressed GZip output stream.
*
* @param b The byte to be written
*
* @exception IOException if an input/output error occurs
*/
public void writeToGZip(int b) throws IOException {
//System.out.println("writeToGZip (int b) compressing");
if (gzipstream == null) {
gzipstream = new GZIPOutputStream(output);
flushToGZip();
response.addHeader("Content-Encoding", "gzip");
}
gzipstream.write(b);
}
/**
* Write <code>b.length</code> bytes from the specified byte array
* to our output stream.
*
* @param b The byte array to be written
*
* @exception IOException if an input/output error occurs
*/
public void write(byte b[]) throws IOException {
write(b, 0, b.length);
}
/**
* Write <code>len</code> bytes from the specified byte array, starting
* at the specified offset, to our output stream.
*
* @param b The byte array containing the bytes to be written
* @param off Zero-relative starting offset of the bytes to be written
* @param len The number of bytes to be written
*
* @exception IOException if an input/output error occurs
*/
public void write(byte b[], int off, int len) throws IOException {
//System.out.println("second write in CompressionResponseStream");
if (closed)
throw new IOException("Cannot write to a closed output stream");
if (len == 0)
return;
if (len <= (buffer.length - bufferCount)) {
System.arraycopy(b, off, buffer, bufferCount, len);
bufferCount += len;
count += len;
return;
}
// buffer full, start writing to gzipstream
writeToGZip(b, off, len);
count += len;
}
public void writeToGZip(byte b[], int off, int len) throws IOException {
//System.out.println("writeToGZip 2 compressing");
if (gzipstream == null) {
gzipstream = new GZIPOutputStream(output);
flushToGZip();
response.addHeader("Content-Encoding", "gzip");
}
gzipstream.write(b, off, len);
}
// -------------------------------------------------------- Package Methods
/**
* Has this response stream been closed?
*/
boolean closed() {
return (this.closed);
}
/**
* Reset the count of bytes written to this stream to zero.
*/
void reset() {
count = 0;
}
}
1.1
jakarta-tomcat-4.0/webapps/examples/WEB-INF/classes/compressionFilters/CompressionFilterTestServlet.java
Index: CompressionFilterTestServlet.java
===================================================================
/*
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* [Additional notices, if required by prior licensing conditions]
*
*/
package compressionFilters;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;
import javax.servlet.*;
import javax.servlet.http.*;
/**
* Very Simple test servlet to test compression filter
* @author Amy Roh
*/
public class CompressionFilterTestServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
ServletOutputStream out = response.getOutputStream();
response.setContentType("text/plain");
Enumeration e = ((HttpServletRequest)request).getHeaders("Accept-Encoding");
while (e.hasMoreElements()) {
String name = (String)e.nextElement();
out.println(name);
if (name.indexOf("gzip") != -1) {
out.println("gzip supported -- able to compress");
}
else out.println("gzip not supported");
}
out.println("Compression Filter Test Servlet");
out.close();
}
}
1.1
jakarta-tomcat-4.0/webapps/examples/WEB-INF/classes/compressionFilters/CompressionFilter.java
Index: CompressionFilter.java
===================================================================
/*
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* [Additional notices, if required by prior licensing conditions]
*
*/
package compressionFilters;
import java.io.IOException;
import java.util.Enumeration;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Implementation of <code>javax.servlet.Filter</code> used to compress
* the ServletResponse if it is bigger than a threshold.
*
* @author Amy Roh
*/
public class CompressionFilter implements Filter{
/**
* The filter configuration object we are associated with. If this value
* is null, this filter instance is not currently configured.
*/
private FilterConfig config = null;
/**
* The threshold number to compress
*/
protected int compressionThreshold;
/**
* Debug level for this filter
*/
private int debug = 0;
/**
* Place this filter into service.
*
* @param filterConfig The filter configuration object
*/
public void init(FilterConfig filterConfig) {
config = filterConfig;
if (filterConfig != null) {
String str = filterConfig.getInitParameter("compressionThreshold");
if (str!=null) {
compressionThreshold = Integer.parseInt(str);
}
else compressionThreshold = 0;
String value = filterConfig.getInitParameter("debug");
if (value!=null) {
debug = Integer.parseInt(value);
}
else debug = 0;
if (debug > 0) {
System.out.println("@init compressionThreshold set to
"+compressionThreshold);
}
} else {
compressionThreshold = 0;
}
}
/**
* Take this filter out of service.
*/
public void destroy() {
this.config = null;
}
/**
* The <code>doFilter</code> method of the Filter is called by the container
* each time a request/response pair is passed through the chain due
* to a client request for a resource at the end of the chain. The FilterChain
passed into this
* method allows the Filter to pass on the request and response to the next
entity in the
* chain.<p>
* This method first examines the request to check whether the client support
compression. <br>
* It simply just pass the request and response if there is no support for
compression.<br>
* If the compression support is available, it creates a
CompressionServletResponseWrapper object which
* compresses the content and modifies the header if the content length is big
enough.
* It then invokes the next entity in the chain using the FilterChain object
(<code>chain.doFilter()</code>), <br>
**/
public void doFilter ( ServletRequest request, ServletResponse response,
FilterChain chain ) throws IOException, ServletException {
if (debug > 0) {
System.out.println("@doFilter");
}
boolean supportCompression = false;
if (request instanceof HttpServletRequest) {
Enumeration e = ((HttpServletRequest)request).getHeaders("Accept-Encoding");
while (e.hasMoreElements()) {
String name = (String)e.nextElement();
if (name.indexOf("gzip") != -1) {
if (debug > 0) {
System.out.println("supports compression");
}
supportCompression = true;
} else {
if (debug > 0) {
System.out.println("no suuport for compresion");
}
}
}
}
if (!supportCompression) {
if (debug > 0) {
System.out.println("doFilter gets called wo compression");
}
chain.doFilter(request, response);
return;
} else {
if (response instanceof HttpServletResponse) {
CompressionServletResponseWrapper wrappedResponse = new
CompressionServletResponseWrapper((HttpServletResponse)response);
wrappedResponse.setCompressionThreshold(compressionThreshold);
if (debug > 0) {
System.out.println("doFilter gets called with compression");
}
chain.doFilter(request, wrappedResponse);
return;
}
}
}
}
