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/*
* 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 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 createReportData(Exception e, List chain) {
HashMap data = new HashMap<>();
data.put("exception", e);
data.put("unknown", Location.UNKNOWN);
data.put("chain", chain);
data.put("locator", new Dispatcher.Locator());
return data;
}
}
