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/*-
* ============LICENSE_START=======================================================
* VID
* ================================================================================
* Copyright (C) 2017 - 2019 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*/
package org.onap.vid.controller;
import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.Objects;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.InternalServerErrorException;
import javax.ws.rs.NotAuthorizedException;
import org.apache.commons.io.input.ReversedLinesFileReader;
import org.apache.commons.lang3.StringUtils;
import org.onap.portalsdk.core.controller.RestrictedBaseController;
import org.onap.portalsdk.core.logging.logic.EELFLoggerDelegate;
import org.onap.vid.model.ExceptionResponse;
import org.onap.vid.roles.Role;
import org.onap.vid.roles.RoleProvider;
import org.onap.vid.utils.Streams;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("logger")
public class LoggerController extends RestrictedBaseController {
private static final EELFLoggerDelegate LOGGER = EELFLoggerDelegate.getLogger(LoggerController.class);
private RoleProvider roleProvider;
private LogfilePathCreator logfilePathCreator;
@Autowired
public LoggerController(RoleProvider roleProvider, LogfilePathCreator logfilePathCreator) {
this.roleProvider = roleProvider;
this.logfilePathCreator = logfilePathCreator;
}
@GetMapping(value = "/{loggerName:audit|error|metrics}")
public String getLog(@PathVariable String loggerName, HttpServletRequest request,
@RequestParam(value="limit", defaultValue = "5000") Integer limit) throws IOException {
List<Role> roles = roleProvider.getUserRoles(request);
boolean userPermitted = roleProvider.userPermissionIsReadLogs(roles);
if (!userPermitted) {
throw new NotAuthorizedException("User not authorized to get logs");
}
String logfilePath = logfilePathCreator.getLogfilePath(loggerName);
try (final ReversedLinesFileReader reader = new ReversedLinesFileReader(new File(logfilePath))) {
Supplier<String> reverseLinesSupplier = () -> {
try {
return reader.readLine();
} catch (NullPointerException e) {
// EOF Reached
return null;
} catch (IOException e) {
throw new InternalServerErrorException("error while reading " + logfilePath, e);
}
};
return Streams.takeWhile(
Stream.generate(reverseLinesSupplier),
line -> !StringUtils.contains(line, "Logging is started"))
.limit(limit)
.limit(5_000)
.filter(Objects::nonNull)
.collect(Collectors.joining("\n"));
}
}
@ExceptionHandler({ NotAuthorizedException.class })
@ResponseStatus(HttpStatus.UNAUTHORIZED)
public String notAuthorizedHandler(NotAuthorizedException e) {
return "UNAUTHORIZED";
}
@ExceptionHandler({ IOException.class, InternalServerErrorException.class })
@ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
public ExceptionResponse ioExceptionHandler(Exception e) {
return ControllersUtils.handleException(e, LOGGER);
}
}
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