/
writer.go
163 lines (151 loc) · 3.42 KB
/
writer.go
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// Copyright (c) 2018-2020 Double All rights reserved.
// Use of this source code is governed by a MIT style
// license that can be found in the LICENSE file.
package logger
import (
"fmt"
"io"
"os"
"path"
"path/filepath"
"time"
)
type (
// LevelWriter defined level writer
LevelWriter struct {
W io.Writer
Level LEVEL
}
// MutiWriter write with level
MutiWriter struct {
writers []io.Writer
Level LEVEL
}
// RotateWriter rotate file
RotateWriter struct {
file *os.File
fileName string
Dirname string
MaxSize int64
}
)
func (c *LevelWriter) Write(p []byte) (int, error) {
level := toLevelString(c.Level)
colorLevel := toColorLevel(c.Level, level)
pbyte := []byte(fmt.Sprintf("%s %s", colorLevel, string(p)))
return c.W.Write(pbyte)
}
func (t *MutiWriter) Write(p []byte) (n int, err error) {
for _, w := range t.writers {
if r, ok := w.(*LevelWriter); ok {
r.Level = t.Level
n, err = w.Write(p)
if err != nil {
return
}
} else {
pbyte := []byte(fmt.Sprintf("%s", string(p)))
n, err = w.Write(pbyte)
if err != nil {
return
}
}
}
return len(p), nil
}
func multiLevelWriter(writers ...io.Writer) *MutiWriter {
allWriters := make([]io.Writer, 0, len(writers))
for _, w := range writers {
if mw, ok := w.(*MutiWriter); ok {
allWriters = append(allWriters, mw.writers...)
} else {
allWriters = append(allWriters, w)
}
}
return &MutiWriter{writers: allWriters}
}
func (r *RotateWriter) Write(p []byte) (n int, err error) {
if n, err = r.file.Write(p); err == nil {
is := false
if is, err = r.isCapped(); is {
r.createFile()
}
}
return n, err
}
func (r *RotateWriter) isCapped() (bool, error) {
info, error := r.file.Stat()
if error != nil {
return false, error
}
size := info.Size()
if size >= r.MaxSize {
return true, nil
}
return false, nil
}
func (r *RotateWriter) createFile() error {
fileName := time.Now().Format("2006_01.02_03:04")
fileName = fmt.Sprintf("%s.log", fileName)
filePath := path.Join(r.Dirname, fileName)
file, error := os.OpenFile(filePath, os.O_APPEND|os.O_CREATE|os.O_RDWR, 0600)
if error != nil {
return error
}
error = r.file.Close()
if error != nil {
return error
}
r.file = file
r.fileName = fileName
return nil
}
func (r *RotateWriter) initFilePath() (string, error) {
var filePath string
if _, err := os.Stat(r.Dirname); os.IsNotExist(err) {
os.Mkdir(r.Dirname, os.ModePerm)
}
filepath.Walk(r.Dirname, func(path string, info os.FileInfo, err error) error {
if filePath == "" && info.IsDir() != true {
fileSize := info.Size()
sizeMatch := fileSize < r.MaxSize
if sizeMatch {
filePath = path
r.fileName = info.Name()
}
}
return nil
})
if filePath != "" {
return filePath, nil
}
fileName := time.Now().Format("2006_01.02_03:04")
fileName = fmt.Sprintf("%s.log", fileName)
filePath = path.Join(r.Dirname, fileName)
r.fileName = fileName
return filePath, nil
}
// NewRotateWriter defined return a rotate writer
func NewRotateWriter(dirName string, maxSize int64, flag int, perm os.FileMode) io.Writer {
tf := &RotateWriter{
Dirname: dirName,
MaxSize: maxSize,
}
filePath, err := tf.initFilePath()
if err != nil {
panic(err)
}
f, err := os.OpenFile(filePath, flag, perm)
if err != nil {
panic(err)
}
tf.file = f
return tf
}
// NewLevelWriter defined return a level writer
func NewLevelWriter(l LEVEL) io.Writer {
return &LevelWriter{
W: os.Stdout,
Level: l,
}
}