com.appslandia.plum.defaults.DefaultDevErrorServlet Maven / Gradle / Ivy

Go to download
// The MIT License (MIT)
// Copyright © 2015 AppsLandia. All rights reserved.

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

package com.appslandia.plum.defaults;

import java.io.IOException;
import java.io.PrintWriter;
import java.nio.charset.StandardCharsets;

import javax.inject.Inject;
import javax.servlet.DispatcherType;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.appslandia.common.base.ToStringBuilder;
import com.appslandia.common.cdi.Json;
import com.appslandia.common.cdi.Json.Profile;
import com.appslandia.common.json.JsonProcessor;
import com.appslandia.common.utils.AssertUtils;
import com.appslandia.common.utils.MimeTypes;
import com.appslandia.plum.base.ExceptionHandler;
import com.appslandia.plum.base.Problem;
import com.appslandia.plum.base.RequestContext;
import com.appslandia.plum.base.RequestContextParser;
import com.appslandia.plum.utils.ServletUtils;
import com.appslandia.plum.utils.WebBeanToStringDecision;

/**
 *
 * @author Loc Ha
 *
 */
@WebServlet(name = "DefaultDevErrorServlet", urlPatterns = "/dev/error")
public class DefaultDevErrorServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

	@Inject
	protected ExceptionHandler exceptionHandler;

	@Inject
	protected RequestContextParser requestContextParser;

	@Inject
	@Json(Profile.PRETTY_NULL)
	protected JsonProcessor jsonProcessor;

	protected void doRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		if (request.getDispatcherType() == DispatcherType.REQUEST) {
			response.getWriter().print("/dev/error");
			return;
		}
		AssertUtils.assertTrue(request.getDispatcherType() == DispatcherType.ERROR);

		response.setContentType(MimeTypes.TEXT_PLAIN);
		response.setCharacterEncoding(StandardCharsets.UTF_8.name());

		PrintWriter out = ServletUtils.getPrintWriter(response);

		out.append("Error Exception: ").append(String.valueOf(request.getAttribute(RequestDispatcher.ERROR_EXCEPTION)));
		out.println();
		out.append("Error Exception Type: ").append(String.valueOf(request.getAttribute(RequestDispatcher.ERROR_EXCEPTION_TYPE)));
		out.println();
		out.append("Error Message: ").append(String.valueOf(request.getAttribute(RequestDispatcher.ERROR_MESSAGE)));
		out.println();
		out.append("Error Request URI: ").append(String.valueOf(request.getAttribute(RequestDispatcher.ERROR_REQUEST_URI)));
		out.println();
		out.append("Error Servlet Name: ").append(String.valueOf(request.getAttribute(RequestDispatcher.ERROR_SERVLET_NAME)));
		out.println();
		out.append("Error Status Code: ").append(String.valueOf(request.getAttribute(RequestDispatcher.ERROR_STATUS_CODE)));
		out.println();

		RequestContext requestContext = this.requestContextParser.parse(request, response);
		Problem problem = (Problem) request.getAttribute(Problem.class.getName());

		if (problem == null) {
			Throwable exception = (Throwable) request.getAttribute(RequestDispatcher.ERROR_EXCEPTION);
			problem = this.exceptionHandler.getProblem(request, requestContext, exception);
		}

		AssertUtils.assertNotNull(problem.getStatus());
		AssertUtils.assertNotNull(problem.getTitle());

		out.println();
		out.append("Problem Status: ").append(String.valueOf(problem.getStatus()));
		out.println();
		out.append("Problem Title: ").append(problem.getTitle());
		out.println();
		out.append("Problem Detail: ").append(problem.getDetail());
		out.println();
		out.append("Problem Type: ").append(problem.getType());
		out.println();
		out.append("Problem Instance: ").append(problem.getInstance());
		out.println();
		out.append("Problem ModelState: ").append(new ToStringBuilder(3).toString(problem.getModelState()));
		out.println();
		out.append("Problem Extensions: ").append(new ToStringBuilder().toString(problem.getExtensions()));
		out.println();

		if (problem.getException() != null) {
			out.println();

			out.append("Problem Exception: ");
			problem.getException().printStackTrace(out);
			out.println();
		}

		out.println();
		out.append("Request Info: ").append(new ToStringBuilder(4).fieldDecision(new WebBeanToStringDecision(true, true, true, false)).toString(request));
		out.flush();
	}

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doRequest(req, resp);
	}

	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doRequest(req, resp);
	}

	@Override
	protected void doOptions(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doRequest(req, resp);
	}

	@Override
	protected void doPut(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doRequest(req, resp);
	}

	@Override
	protected void doDelete(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doRequest(req, resp);
	}

	@Override
	protected void doTrace(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		throw new UnsupportedOperationException();
	}
}