| /* |
| * 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.struts2.dispatcher; |
| |
| import com.opensymphony.xwork2.inject.Inject; |
| import com.opensymphony.xwork2.util.location.Location; |
| import com.opensymphony.xwork2.util.location.LocationUtils; |
| import freemarker.template.Template; |
| import org.apache.commons.lang3.BooleanUtils; |
| import org.apache.logging.log4j.LogManager; |
| import org.apache.logging.log4j.Logger; |
| import org.apache.struts2.StrutsConstants; |
| import org.apache.struts2.StrutsException; |
| import org.apache.struts2.views.freemarker.FreemarkerManager; |
| |
| import javax.servlet.ServletContext; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import java.io.IOException; |
| import java.io.StringWriter; |
| import java.io.Writer; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| |
| /** |
| * Default implementation of {@link org.apache.struts2.dispatcher.DispatcherErrorHandler} |
| * which sends Error Report in devMode or {@link javax.servlet.http.HttpServletResponse#sendError} otherwise. |
| */ |
| public class DefaultDispatcherErrorHandler implements DispatcherErrorHandler { |
| |
| private static final Logger LOG = LogManager.getLogger(DefaultDispatcherErrorHandler.class); |
| |
| private FreemarkerManager freemarkerManager; |
| private boolean devMode; |
| private Template template; |
| |
| @Inject |
| public void setFreemarkerManager(FreemarkerManager freemarkerManager) { |
| this.freemarkerManager = freemarkerManager; |
| } |
| |
| @Inject(StrutsConstants.STRUTS_DEVMODE) |
| public void setDevMode(String devMode) { |
| this.devMode = BooleanUtils.toBoolean(devMode); |
| } |
| |
| public void init(ServletContext ctx) { |
| try { |
| freemarker.template.Configuration config = freemarkerManager.getConfiguration(ctx); |
| template = config.getTemplate("/org/apache/struts2/dispatcher/error.ftl"); |
| } catch (IOException e) { |
| throw new StrutsException(e); |
| } |
| } |
| |
| public void handleError(HttpServletRequest request, HttpServletResponse response, int code, Exception e) { |
| Boolean devModeOverride = PrepareOperations.getDevModeOverride(); |
| if (devModeOverride != null ? devModeOverride : devMode) { |
| handleErrorInDevMode(response, code, e); |
| } else { |
| sendErrorResponse(request, response, code, e); |
| } |
| } |
| |
| protected void sendErrorResponse(HttpServletRequest request, HttpServletResponse response, int code, Exception e) { |
| try { |
| // WW-1977: Only put errors in the request when code is a 500 error |
| if (code == HttpServletResponse.SC_INTERNAL_SERVER_ERROR) { |
| // WW-4103: Only logs error when application error occurred, not Struts error |
| LOG.error("Exception occurred during processing request: {}", e.getMessage(), e); |
| // send a http error response to use the servlet defined error handler |
| // make the exception available to the web.xml defined error page |
| request.setAttribute("javax.servlet.error.exception", e); |
| |
| // for compatibility |
| request.setAttribute("javax.servlet.jsp.jspException", e); |
| } |
| |
| // send the error response |
| response.sendError(code, e.getMessage()); |
| } catch (IOException e1) { |
| // we're already sending an error, not much else we can do if more stuff breaks |
| LOG.warn("Unable to send error response, code: {};", code, e1); |
| } catch (IllegalStateException ise) { |
| // Log illegalstate instead of passing unrecoverable exception to calling thread |
| LOG.warn("Unable to send error response, code: {}; isCommited: {};", code, response.isCommitted(), ise); |
| } |
| } |
| |
| protected void handleErrorInDevMode(HttpServletResponse response, int code, Exception e) { |
| LOG.debug("Exception occurred during processing request: {}", e.getMessage(), e); |
| try { |
| List<Throwable> chain = new ArrayList<>(); |
| Throwable cur = e; |
| chain.add(cur); |
| while ((cur = cur.getCause()) != null) { |
| chain.add(cur); |
| } |
| |
| Writer writer = new StringWriter(); |
| template.process(createReportData(e, chain), writer); |
| |
| response.setContentType("text/html"); |
| response.getWriter().write(writer.toString()); |
| response.getWriter().close(); |
| } catch (Exception exp) { |
| try { |
| LOG.debug("Cannot show problem report!", exp); |
| response.sendError(code, "Unable to show problem report:\n" + exp + "\n\n" + LocationUtils.getLocation(exp)); |
| } catch (IOException ex) { |
| // we're already sending an error, not much else we can do if more stuff breaks |
| LOG.warn("Unable to send error response, code: {};", code, ex); |
| } catch (IllegalStateException ise) { |
| // Log illegalstate instead of passing unrecoverable exception to calling thread |
| LOG.warn("Unable to send error response, code: {}; isCommited: {};", code, response.isCommitted(), ise); |
| } |
| } |
| } |
| |
| protected HashMap<String, Object> createReportData(Exception e, List<Throwable> chain) { |
| HashMap<String, Object> data = new HashMap<>(); |
| data.put("exception", e); |
| data.put("unknown", Location.UNKNOWN); |
| data.put("chain", chain); |
| data.put("locator", new Dispatcher.Locator()); |
| return data; |
| } |
| } |