/*
 * Copyright 2014 Red Hat, Inc.
 *
 *  All rights reserved. This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License v1.0
 *  and Apache License v2.0 which accompanies this distribution.
 *
 *  The Eclipse Public License is available at
 *  http://www.eclipse.org/legal/epl-v10.html
 *
 *  The Apache License v2.0 is available at
 *  http://www.opensource.org/licenses/apache2.0.php
 *
 *  You may elect to redistribute this code under either of these licenses.
 */

package io.vertx.ext.web.handler;

import io.vertx.codegen.annotations.VertxGen;
import io.vertx.core.Handler;
import io.vertx.ext.web.common.WebEnvironment;
import io.vertx.ext.web.handler.impl.ErrorHandlerImpl;
import io.vertx.ext.web.RoutingContext;

A pretty error handler for rendering error pages. When working in development mode
exception details will be returned in the server responses, otherwise or when
manually specified no exception details are returned in the HTTP response.
The reason the display of the exception details is by default dependent of the mode
is to follow the security best practices:
https://www.owasp.org/index.php/Improper_Error_Handling
Author:
Tim Fox, Paulo Lopes/**
 * A pretty error handler for rendering error pages. When working in development mode
 * exception details will be returned in the server responses, otherwise or when
 * manually specified no exception details are returned in the HTTP response.
 *
 * The reason the display of the exception details is by default dependent of the mode
 * is to follow the security best practices:
 * <a href="https://www.owasp.org/index.php/Improper_Error_Handling">https://www.owasp.org/index.php/Improper_Error_Handling</a>
 *
 * @author <a href="http://tfox.org">Tim Fox</a>
 * @author <a href="mailto:plopes@redhat.com">Paulo Lopes</a>
 */
@VertxGen
public interface ErrorHandler extends Handler<RoutingContext> {

  
The default template to use for rendering
/**
   * The default template to use for rendering
   */
  String DEFAULT_ERROR_HANDLER_TEMPLATE = "META-INF/vertx/web/vertx-web-error.html";

  
Create an error handler using defaults
Returns:
the handler/**
   * Create an error handler using defaults
   *
   * @return the handler
   */
  static ErrorHandler create() {
    return create(DEFAULT_ERROR_HANDLER_TEMPLATE, WebEnvironment.development());
  }

  
Create an error handler
Params:
errorTemplateName –  the error template name - will be looked up from the classpath
displayExceptionDetails –  true if exception details should be displayed
Returns:
the handler/**
   * Create an error handler
   *
   * @param errorTemplateName  the error template name - will be looked up from the classpath
   * @param displayExceptionDetails  true if exception details should be displayed
   * @return the handler
   */
  static ErrorHandler create(String errorTemplateName, boolean displayExceptionDetails) {
    return new ErrorHandlerImpl(errorTemplateName, displayExceptionDetails);
  }

  
Create an error handler
Params:
displayExceptionDetails –  true if exception details should be displayed
Returns:
the handler/**
   * Create an error handler
   *
   * @param displayExceptionDetails  true if exception details should be displayed
   * @return the handler
   */
  static ErrorHandler create(boolean displayExceptionDetails) {
    return create(DEFAULT_ERROR_HANDLER_TEMPLATE, displayExceptionDetails);
  }

  
Create an error handler
Params:
errorTemplateName –  the error template name - will be looked up from the classpath
Returns:
the handler/**
   * Create an error handler
   *
   * @param errorTemplateName  the error template name - will be looked up from the classpath
   * @return the handler
   */
  static ErrorHandler create(String errorTemplateName) {
    return create(errorTemplateName, WebEnvironment.development());
  }

}