Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
1929395 - replace the java webparts compression filter with an embedd…
…ed version based off of a tomcat example filter.
- Loading branch information
Showing
8 changed files
with
1,145 additions
and
712 deletions.
There are no files selected for viewing
Large diffs are not rendered by default.
Oops, something went wrong.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
215 changes: 215 additions & 0 deletions
215
symmetric/src/main/java/org/jumpmind/symmetric/web/compression/CompressionFilter.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,215 @@ | ||
| /* | ||
| * 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.jumpmind.symmetric.web.compression; | ||
|
|
||
| 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; | ||
|
|
||
| import org.apache.commons.logging.Log; | ||
| import org.apache.commons.logging.LogFactory; | ||
|
|
||
| /** | ||
| * Implementation of <code>javax.servlet.Filter</code> used to compress | ||
| * the ServletResponse if it is bigger than a threshold. | ||
| * | ||
| * This package is derived from the Jakarta | ||
| * <a href="http://jakarta.apache.org/tomcat">Tomcat</a> | ||
| * examples compression filter and is distributed in SymmetricDS for convenience. | ||
| * | ||
| * @author Amy Roh | ||
| * @author Dmitri Valdin | ||
| * @version $Revision: 466607 $, $Date: 2006-10-21 17:09:50 -0600 (Sat, 21 Oct 2006) $ | ||
| */ | ||
|
|
||
| public class CompressionFilter implements Filter { | ||
|
|
||
| static final Log logger = LogFactory.getLog(CompressionFilter.class); | ||
|
|
||
| /** | ||
| * The filter configuration object we are associated with. If this value | ||
| * is null, this filter instance is not currently configured. | ||
| */ | ||
| private FilterConfig config = null; | ||
|
|
||
| /** | ||
| * Minimal reasonable threshold | ||
| */ | ||
| private final int minThreshold = 128; | ||
|
|
||
| /** | ||
| * The threshold number to compress | ||
| */ | ||
| protected int compressionThreshold; | ||
|
|
||
| /** | ||
| * 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); | ||
| if (compressionThreshold != 0 && compressionThreshold < minThreshold) { | ||
| if (logger.isDebugEnabled()) { | ||
| logger.debug("compressionThreshold should be either 0 - no compression or >= " | ||
| + minThreshold); | ||
| logger.debug("compressionThreshold set to " + minThreshold); | ||
| } | ||
| compressionThreshold = minThreshold; | ||
| } | ||
| } else { | ||
| compressionThreshold = 0; | ||
| } | ||
|
|
||
| } 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> | ||
| **/ | ||
|
|
||
| @SuppressWarnings("unchecked") | ||
| public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, | ||
| ServletException { | ||
|
|
||
| if (logger.isDebugEnabled()) { | ||
| logger.debug("@doFilter"); | ||
| } | ||
|
|
||
| if (compressionThreshold == 0) { | ||
| if (logger.isDebugEnabled()) { | ||
| logger.debug("doFilter gets called, but compressionTreshold is set to 0 - no compression"); | ||
| } | ||
| chain.doFilter(request, response); | ||
| return; | ||
| } | ||
|
|
||
| boolean supportCompression = false; | ||
| if (request instanceof HttpServletRequest) { | ||
| if (logger.isDebugEnabled()) { | ||
| logger.debug("requestURI = " + ((HttpServletRequest) request).getRequestURI()); | ||
| } | ||
|
|
||
| // Are we allowed to compress ? | ||
| String s = (String) ((HttpServletRequest) request).getParameter("gzip"); | ||
| if ("false".equals(s)) { | ||
| if (logger.isDebugEnabled()) { | ||
| logger.debug("got parameter gzip=false --> don't compress, just chain filter"); | ||
| } | ||
| chain.doFilter(request, response); | ||
| return; | ||
| } | ||
|
|
||
| Enumeration e = ((HttpServletRequest) request).getHeaders("Accept-Encoding"); | ||
| while (e.hasMoreElements()) { | ||
| String name = (String) e.nextElement(); | ||
| if (name.indexOf("gzip") != -1) { | ||
| if (logger.isDebugEnabled()) { | ||
| logger.debug("supports compression"); | ||
| } | ||
| supportCompression = true; | ||
| } else { | ||
| if (logger.isDebugEnabled()) { | ||
| logger.debug("no support for compresion"); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| if (!supportCompression) { | ||
| if (logger.isDebugEnabled()) { | ||
| logger.debug("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 (logger.isDebugEnabled()) { | ||
| logger.debug("doFilter gets called with compression"); | ||
| } | ||
| try { | ||
| chain.doFilter(request, wrappedResponse); | ||
| } finally { | ||
| wrappedResponse.finishResponse(); | ||
| } | ||
| return; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Set filter config | ||
| * This function is equivalent to init. Required by Weblogic 6.1 | ||
| * | ||
| * @param filterConfig The filter configuration object | ||
| */ | ||
| public void setFilterConfig(FilterConfig filterConfig) { | ||
| init(filterConfig); | ||
| } | ||
|
|
||
| /** | ||
| * Return filter config | ||
| * Required by Weblogic 6.1 | ||
| */ | ||
| public FilterConfig getFilterConfig() { | ||
| return config; | ||
| } | ||
|
|
||
| } |
Oops, something went wrong.