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formatter.go
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formatter.go
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// Copyright 2016-2017 VMware, Inc. 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.
package syslog
import (
"fmt"
"net"
"os"
"time"
)
type formatter interface {
Format(p Priority, ts time.Time, hostname, tag, msg string) string
}
type localFormatter struct{}
func (l *localFormatter) Format(p Priority, ts time.Time, _, tag, msg string) string {
return fmt.Sprintf("<%d>%s %s[%d]: %s", p, ts.Format(time.Stamp), tag, os.Getpid(), msg)
}
type rfc3164Formatter struct{}
func (c *rfc3164Formatter) Format(p Priority, ts time.Time, hostname, tag, msg string) string {
return fmt.Sprintf("<%d>%s %s %s[%d]: %s", p, ts.Format(time.RFC3339), hostname, tag, os.Getpid(), msg)
}
type netDialer interface {
dial() (net.Conn, error)
}
type defaultNetDialer struct {
network, address string
}
func (d *defaultNetDialer) dial() (net.Conn, error) {
Logger.Infof("trying to connect to %s://%s", d.network, d.address)
return net.DialTimeout(d.network, d.address, defaultDialTimeout)
}
func newFormatter(network string, f Format) formatter {
if network == "" {
return &localFormatter{}
}
switch f {
case RFC3164:
return &rfc3164Formatter{}
}
return nil
}