ExceptionHandler.java

/**
 * Copyright 2016 benjobs
 * <p>
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.opencron.server.handler;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.opencron.common.utils.WebUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MaxUploadSizeExceededException;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;


public class ExceptionHandler implements HandlerExceptionResolver {

    private static final Logger logger = LoggerFactory.getLogger(ExceptionHandler.class);

    @Override
    public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception ex) {
        if (ex instanceof MaxUploadSizeExceededException) {
            WebUtils.writeJson(httpServletResponse, "长传的文件大小超过" + ((MaxUploadSizeExceededException) ex).getMaxUploadSize() + "字节限制,上传失败!");
            return null;
        }
        ModelAndView view = new ModelAndView();

        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        ex.printStackTrace(new PrintStream(byteArrayOutputStream));
        String exception = byteArrayOutputStream.toString();

        view.getModel().put("error", "URL:" + WebUtils.getWebUrlPath(httpServletRequest) + httpServletRequest.getRequestURI() + "\r\n\r\nERROR:" + exception);
        logger.error("[opencron]error:{}", ex.getLocalizedMessage());
        view.setViewName("/error/500");
        return view;
    }

}