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Jetty example source code file (RestFilter.java)
The Jetty RestFilter.java source code//======================================================================== //Copyright 2007 CSC - Scientific Computing Ltd. //------------------------------------------------------------------------ //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 org.mortbay.servlet; // was fi.csc.microarray.proto import java.io.File; import java.io.FileOutputStream; import java.io.IOException; 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.UnavailableException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.mortbay.util.IO; import org.mortbay.util.URIUtil; /** * <p> * Support for HTTP PUT and DELETE methods. * </p> * <p> * THIS FILTER SHOULD ONLY BE USED WITH VERY GOOD SECURITY CONSTRAINTS! * </b> * * <p> * If the filter init parameter maxPutSize is set to a positive integer, then * only puts of known size less than maxPutSize will be accepted. * </p> * * @author Aleksi Kallio * @ * */ public class RestFilter implements Filter { private static final String HTTP_METHOD_PUT="PUT"; private static final String HTTP_METHOD_GET="GET"; private static final String HTTP_METHOD_DELETE="DELETE"; private FilterConfig filterConfig; private long _maxPutSize; /* ------------------------------------------------------------ */ /* (non-Javadoc) * @see javax.servlet.Filter#init(javax.servlet.FilterConfig) */ public void init(FilterConfig filterConfig) throws UnavailableException { this.filterConfig=filterConfig; String tmp = filterConfig.getInitParameter("maxPutSize"); if (tmp!=null) _maxPutSize=Long.parseLong(tmp); } /* ------------------------------------------------------------ */ /** * @param request * @return */ private File locateFile(HttpServletRequest request) { return new File(filterConfig.getServletContext().getRealPath(URIUtil.addPaths(request.getServletPath(),request.getPathInfo()))); } /* ------------------------------------------------------------ */ /* (non-Javadoc) * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain) */ public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { if (!(request instanceof HttpServletRequest&&response instanceof HttpServletResponse)) { chain.doFilter(request,response); return; } HttpServletRequest httpRequest=(HttpServletRequest)request; HttpServletResponse httpResponse=(HttpServletResponse)response; if (httpRequest.getMethod().equals(HTTP_METHOD_GET)) { chain.doFilter(httpRequest,httpResponse); } else if (httpRequest.getMethod().equals(HTTP_METHOD_PUT)) { doPut(httpRequest,httpResponse); } else if (httpRequest.getMethod().equals(HTTP_METHOD_DELETE)) { doDelete(httpRequest,httpResponse); } else { chain.doFilter(httpRequest,httpResponse); } } /* ------------------------------------------------------------ */ /** * @param request * @param response * @throws ServletException * @throws IOException */ protected void doPut(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { File file=locateFile(request); if (file.exists()) { boolean success=file.delete(); // replace file if it exists if (!success) { response.sendError(HttpServletResponse.SC_FORBIDDEN); return; } } FileOutputStream out=new FileOutputStream(file); try { if (_maxPutSize>0) { int length=request.getContentLength(); if (length>_maxPutSize) { response.sendError(HttpServletResponse.SC_FORBIDDEN); return; } IO.copy(request.getInputStream(),out,_maxPutSize); } else IO.copy(request.getInputStream(),out); } finally { out.close(); } response.setStatus(HttpServletResponse.SC_NO_CONTENT); } /* ------------------------------------------------------------ */ /** * @param request * @param response * @throws ServletException * @throws IOException */ protected void doDelete(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { File file=locateFile(request); if (!file.exists()) { response.sendError(HttpServletResponse.SC_NOT_FOUND); return; } boolean success=IO.delete(file); // actual delete operation if (success) { response.setStatus(HttpServletResponse.SC_NO_CONTENT); } else { response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); } } public void destroy() { // nothing to destroy } } Other Jetty examples (source code examples)Here is a short list of links related to this Jetty RestFilter.java source code file: |
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