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/**
* This file is part of Graylog.
*
* Graylog is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Graylog is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Graylog. If not, see .
*/
package org.graylog2.rest.resources.system;
import com.codahale.metrics.annotation.Timed;
import com.google.common.collect.Sets;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.apache.shiro.authz.annotation.RequiresAuthentication;
import org.graylog2.audit.AuditEventTypes;
import org.graylog2.audit.jersey.AuditEvent;
import org.graylog2.database.NotFoundException;
import org.graylog2.events.ClusterEventBus;
import org.graylog2.grok.GrokPattern;
import org.graylog2.grok.GrokPatternService;
import org.graylog2.grok.GrokPatternsChangedEvent;
import org.graylog2.plugin.database.ValidationException;
import org.graylog2.rest.models.system.responses.GrokPatternList;
import org.graylog2.shared.rest.resources.RestResource;
import org.graylog2.shared.security.RestPermissions;
import javax.inject.Inject;
import javax.validation.Valid;
import javax.validation.constraints.NotNull;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.DefaultValue;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URI;
import java.nio.charset.StandardCharsets;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
@RequiresAuthentication
@Path("/system/grok")
@Produces("application/json")
@Consumes("application/json")
@Api(value = "System/Grok", description = "Manage grok patterns")
public class GrokResource extends RestResource {
private static final Pattern GROK_LINE_PATTERN = Pattern.compile("^(\\w+)[ \t]+(.*)$");
private final GrokPatternService grokPatternService;
private final ClusterEventBus clusterBus;
@Inject
public GrokResource(GrokPatternService grokPatternService, ClusterEventBus clusterBus) {
this.grokPatternService = grokPatternService;
this.clusterBus = clusterBus;
}
@GET
@Timed
@ApiOperation("Get all existing grok patterns")
public GrokPatternList listGrokPatterns() {
checkPermission(RestPermissions.INPUTS_READ);
return GrokPatternList.create(grokPatternService.loadAll());
}
@GET
@Timed
@Path("/{patternId}")
@ApiOperation("Get the existing grok pattern")
public GrokPattern listPattern(@ApiParam(name = "patternId", required = true)
@PathParam("patternId") String patternId) throws NotFoundException {
checkPermission(RestPermissions.INPUTS_READ);
return grokPatternService.load(patternId);
}
@POST
@Timed
@ApiOperation(value = "Add a new named pattern", response = GrokPattern.class)
@AuditEvent(type = AuditEventTypes.GROK_PATTERN_CREATE)
public Response createPattern(@ApiParam(name = "pattern", required = true)
@Valid @NotNull GrokPattern pattern) throws ValidationException {
checkPermission(RestPermissions.INPUTS_CREATE);
// remove the ID from the pattern, this is only used to create new patterns
final GrokPattern newPattern = grokPatternService.save(pattern.toBuilder().id(null).build());
clusterBus.post(GrokPatternsChangedEvent.create(Collections.emptySet(), Sets.newHashSet(newPattern.name())));
final URI patternUri = getUriBuilderToSelf().path(GrokResource.class, "listPattern").build(newPattern.id());
return Response.created(patternUri).entity(newPattern).build();
}
@PUT
@Timed
@ApiOperation("Add a list of new patterns")
@AuditEvent(type = AuditEventTypes.GROK_PATTERN_IMPORT_CREATE)
public Response bulkUpdatePatterns(@ApiParam(name = "patterns", required = true) @NotNull GrokPatternList patternList,
@ApiParam(name = "replace", value = "Replace all patterns with the new ones.")
@QueryParam("replace") @DefaultValue("false") boolean replace) throws ValidationException {
checkPermission(RestPermissions.INPUTS_CREATE);
final Set updatedPatternNames = Sets.newHashSet();
for (final GrokPattern pattern : patternList.patterns()) {
updatedPatternNames.add(pattern.name());
if (!grokPatternService.validate(pattern)) {
throw new ValidationException("Invalid pattern " + pattern + ". Did not save any patterns.");
}
}
grokPatternService.saveAll(patternList.patterns(), replace);
clusterBus.post(GrokPatternsChangedEvent.create(Collections.emptySet(), updatedPatternNames));
return Response.accepted().build();
}
@POST
@Consumes(MediaType.TEXT_PLAIN)
@Timed
@ApiOperation("Add a list of new patterns")
@AuditEvent(type = AuditEventTypes.GROK_PATTERN_IMPORT_CREATE)
public Response bulkUpdatePatternsFromTextFile(@ApiParam(name = "patterns", required = true) @NotNull InputStream patternsFile,
@ApiParam(name = "replace", value = "Replace all patterns with the new ones.")
@QueryParam("replace") @DefaultValue("false") boolean replace) throws ValidationException, IOException {
checkPermission(RestPermissions.INPUTS_CREATE);
final List grokPatterns = readGrokPatterns(patternsFile);
if (!grokPatterns.isEmpty()) {
final Set updatedPatternNames = Sets.newHashSetWithExpectedSize(grokPatterns.size());
for (final GrokPattern pattern : grokPatterns) {
updatedPatternNames.add(pattern.name());
if (!grokPatternService.validate(pattern)) {
throw new ValidationException("Invalid pattern " + pattern + ". Did not save any patterns.");
}
}
grokPatternService.saveAll(grokPatterns, replace);
clusterBus.post(GrokPatternsChangedEvent.create(Collections.emptySet(), updatedPatternNames));
}
return Response.accepted().build();
}
private List readGrokPatterns(InputStream patternList) throws IOException {
try (final InputStreamReader inputStreamReader = new InputStreamReader(patternList, StandardCharsets.UTF_8);
final BufferedReader bufferedReader = new BufferedReader(inputStreamReader)) {
return bufferedReader.lines()
.map(String::trim)
.filter(s -> !s.startsWith("#") && !s.isEmpty())
.map(GROK_LINE_PATTERN::matcher)
.filter(Matcher::matches)
.map(matcher -> GrokPattern.create(matcher.group(1), matcher.group(2)))
.collect(Collectors.toList());
}
}
@PUT
@Timed
@Path("/{patternId}")
@ApiOperation("Update an existing pattern")
@AuditEvent(type = AuditEventTypes.GROK_PATTERN_UPDATE)
public GrokPattern updatePattern(@ApiParam(name = "patternId", required = true)
@PathParam("patternId") String patternId,
@ApiParam(name = "pattern", required = true)
GrokPattern pattern) throws NotFoundException, ValidationException {
checkPermission(RestPermissions.INPUTS_EDIT);
final GrokPattern oldPattern = grokPatternService.load(patternId);
final Set deletedNames = Sets.newHashSet(oldPattern.name());
final Set updatedNames = Sets.newHashSet(pattern.name());
final GrokPattern toSave = oldPattern.toBuilder()
.name(pattern.name())
.pattern(pattern.pattern())
.build();
clusterBus.post(GrokPatternsChangedEvent.create(deletedNames, updatedNames));
return grokPatternService.save(toSave);
}
@DELETE
@Timed
@Path("/{patternId}")
@ApiOperation("Remove an existing pattern by id")
@AuditEvent(type = AuditEventTypes.GROK_PATTERN_DELETE)
public void removePattern(@ApiParam(name = "patternId", required = true) @PathParam("patternId") String patternId) throws NotFoundException {
checkPermission(RestPermissions.INPUTS_EDIT);
final GrokPattern pattern = grokPatternService.load(patternId);
clusterBus.post(GrokPatternsChangedEvent.create(Sets.newHashSet(pattern.name()), Collections.emptySet()));
if (grokPatternService.delete(patternId) == 0) {
throw new javax.ws.rs.NotFoundException("Couldn't remove Grok pattern with ID " + patternId);
}
}
}
