forked from cilium/cilium
/
log.go
79 lines (66 loc) · 1.68 KB
/
log.go
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// Copyright 2016-2017 Authors of Cilium
//
// 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 proxy
import (
"bufio"
"encoding/json"
"fmt"
"os"
)
var (
logFile *os.File
logBuf *bufio.Writer
metadata []string
)
// OpenLogfile opens a file for logging
func OpenLogfile(lf string) error {
var err error
if logFile, err = os.OpenFile(lf, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0666); err != nil {
return err
}
logBuf = bufio.NewWriter(logFile)
return nil
}
// CloseLogfile closes the logfile
func CloseLogfile() {
logBuf.Flush()
logFile.Close()
}
// SetMetadata sets the metadata to include in each record
func SetMetadata(md []string) {
metadata = md
}
// Log logs a record to the logfile and flushes the buffer
func Log(l *LogRecord, typ FlowType, verdict FlowVerdict, code int) {
if logBuf == nil {
return
}
l.Type = typ
l.Verdict = verdict
l.Metadata = metadata
l.HTTP = &LogRecordHTTP{
Code: code,
Method: l.request.Method,
URL: l.request.URL,
Protocol: l.request.Proto,
Header: l.request.Header,
}
b, err := json.Marshal(*l)
if err != nil {
fmt.Fprintln(logBuf, err.Error())
} else {
fmt.Fprintln(logBuf, string(b))
}
logBuf.Flush()
}