1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/*-
* ============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 ch.qos.logback.classic.LoggerContext;
import ch.qos.logback.core.Appender;
import ch.qos.logback.core.FileAppender;
import ch.qos.logback.core.spi.AppenderAttachable;
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.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.*;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.InternalServerErrorException;
import javax.ws.rs.NotAuthorizedException;
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 static com.att.eelf.configuration.Configuration.GENERAL_LOGGER_NAME;
@RestController
@RequestMapping("logger")
public class LoggerController extends RestrictedBaseController {
private static final EELFLoggerDelegate LOGGER = EELFLoggerDelegate.getLogger(LoggerController.class);
@Autowired
RoleProvider roleProvider;
@RequestMapping(value = "/{loggerName:audit|error|metrics}", method = RequestMethod.GET)
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 = 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"));
}
}
private String getLogfilePath(String loggerName) {
/*
Find the requested logger, and pull all of it's appenders.
Find the first of the appenders that is a FileAppender, and return it's
write-out filename.
*/
LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();
return context.getLoggerList().stream()
.filter(logger -> logger.getName().equals(GENERAL_LOGGER_NAME + "." + loggerName))
.flatMap(this::pullSubAppenders)
.flatMap(appender -> {
// Appender might be "attachable", if so - roll-up its sub-appenders
return (appender instanceof AppenderAttachable) ?
pullSubAppenders((AppenderAttachable<?>) appender) : Stream.of(appender);
})
.filter(appender -> appender instanceof FileAppender)
.map(appender -> (FileAppender<?>) appender)
.map(FileAppender::getFile)
.findFirst()
.orElseThrow(() -> new InternalServerErrorException("logfile for " + loggerName + " not found"));
}
private <T> Stream<Appender<T>> pullSubAppenders(AppenderAttachable<T> logger) {
return Streams.fromIterator(logger.iteratorForAppenders());
}
@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);
}
}
|
