/*
* 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.ambari.server.api;
import java.io.IOException;
import java.util.LinkedHashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.ambari.server.configuration.Configuration;
import org.apache.ambari.server.security.authorization.jwt.JwtAuthenticationProperties;
import org.eclipse.jetty.http.HttpStatus;
import org.eclipse.jetty.http.MimeTypes;
import org.eclipse.jetty.server.AbstractHttpConnection;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.handler.ErrorHandler;
import com.google.gson.Gson;
import com.google.inject.Inject;
import com.google.inject.name.Named;
/**
* Custom error handler for Jetty to return response as JSON instead of stub http page
*/
public class AmbariErrorHandler extends ErrorHandler {
private final Gson gson;
private Configuration configuration;
@Inject
public AmbariErrorHandler(@Named("prettyGson") Gson prettyGson, Configuration configuration) {
this.gson = prettyGson;
this.configuration = configuration;
}
@Override
public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException {
AbstractHttpConnection connection = AbstractHttpConnection.getCurrentConnection();
connection.getRequest().setHandled(true);
response.setContentType(MimeTypes.TEXT_PLAIN);
Map<String, Object> errorMap = new LinkedHashMap<>();
int code = connection.getResponse().getStatus();
errorMap.put("status", code);
String message = connection.getResponse().getReason();
if (message == null) {
message = HttpStatus.getMessage(code);
}
errorMap.put("message", message);
if (code == HttpServletResponse.SC_FORBIDDEN) {
//if SSO is configured we should provide info about it in case of access error
JwtAuthenticationProperties jwtProperties = configuration.getJwtProperties();
if (jwtProperties != null) {
errorMap.put("jwtProviderUrl", jwtProperties.getAuthenticationProviderUrl() + "?" +
jwtProperties.getOriginalUrlQueryParam() + "=");
}
}
gson.toJson(errorMap, response.getWriter());
}
}