/*
 * The MIT License
 *
 * Copyright 2015 avm.
 *
 * 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 jpt.app01;

import java.io.IOException;
import java.io.PrintStream;
import java.util.logging.Logger;

import com.sun.net.httpserver.HttpExchange;

import jpt.app01.session.SessionFilter;

/**
 *
 * @author avm
 */
class ErrorResponder {
  
  private static final Logger LOG = Logger.getLogger(ErrorResponder.class.getName());
  
  public static final int ERR_BAD_REQUEST = 400;
  public static final int ERR_NOT_FOUND = 404;

  private ErrorResponder() {} // Pure static

  public static void respond(HttpExchange exchange, int statusCode, String message) throws IOException {
    LOG.warning(() -> statusCode + ": " + message);
    exchange.sendResponseHeaders(statusCode, 0);
    if ("HEAD".equals(exchange.getRequestMethod())) return;
    try (PrintStream out = new PrintStream(exchange.getResponseBody())) {
      HeaderResponse.send(out, SessionFilter.getSession(exchange), "Error " + statusCode);
      out.write(message.getBytes());
    }
  }
  
}

/*
 * The MIT License
 *
 * Copyright 2015 avm.
 *
 * 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 jpt.app01;

import java.io.IOException;
import java.io.PrintStream;
import java.util.logging.Logger;

import com.sun.net.httpserver.HttpExchange;

import jpt.app01.session.SessionFilter;

/**
 *
 * @author avm
 */
class ErrorResponder {
  
  private static final Logger LOG = Logger.getLogger(ErrorResponder.class.getName());
  
  public static final int ERR_BAD_REQUEST = 400;
  public static final int ERR_NOT_FOUND = 404;
  public static final int SYS_INTERNAL = 500;

  private ErrorResponder() {} // Pure static

  public static void respond(HttpExchange exchange, int statusCode, String message) throws IOException {
    LOG.warning(() -> statusCode + ": " + message);
    exchange.sendResponseHeaders(statusCode, 0);
    if ("HEAD".equals(exchange.getRequestMethod())) return;
    try (PrintStream out = new PrintStream(exchange.getResponseBody())) {
      HeaderResponse.send(out, SessionFilter.getSession(exchange), "Error " + statusCode);
      out.write(message.getBytes());
    }
  }
  
}

add Internal Server Error status code