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graylog.go
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graylog.go
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//
// Copyright (c) SAS Institute Inc.
//
// 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.
//
package auditor
import (
"bytes"
"encoding/json"
"fmt"
"net/http"
"strings"
"time"
"github.com/sassoftware/relic/v8/lib/audit"
)
func logGraylog(info *audit.Info, rowid int64) error {
if auditConfig.GraylogURL == "" {
return nil
}
msg := map[string]interface{}{
"version": "1.1",
"host": info.Attributes["sig.hostname"],
"short_message": fmtRow(info, rowid),
"level": 6, // INFO
}
if timestamp, err := time.Parse(time.RFC3339Nano, info.Attributes["sig.timestamp"].(string)); err == nil {
msg["timestamp"] = timestamp.Unix()
}
for k, v := range info.Attributes {
if v == nil {
continue
}
// graylog quietly changes dots to underscores, but only after running
// stream filters. that gets confusing real quickly so change it to
// underscore now.
k = strings.ReplaceAll(k, ".", "_")
msg["_"+k] = v
}
blob, err := json.Marshal(msg)
if err != nil {
return err
}
resp, err := http.Post(auditConfig.GraylogURL, "application/json", bytes.NewReader(blob))
if err != nil {
return err
} else if resp.StatusCode >= 300 {
return fmt.Errorf("posting to graylog: %s", resp.Status)
}
resp.Body.Close()
return nil
}