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glog_logger.go
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glog_logger.go
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// Copyright 2017 gf Author(https://github.com/gogf/gf). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.
package glog
import (
"bytes"
"fmt"
"github.com/gogf/gf/internal/intlog"
"io"
"os"
"strings"
"time"
"github.com/gogf/gf/debug/gdebug"
"github.com/gogf/gf/os/gfile"
"github.com/gogf/gf/os/gfpool"
"github.com/gogf/gf/os/gtime"
"github.com/gogf/gf/text/gregex"
"github.com/gogf/gf/util/gconv"
)
// Logger is the struct for logging management.
type Logger struct {
parent *Logger // Parent logger.
config Config // Logger configuration.
}
const (
gDEFAULT_FILE_FORMAT = `{Y-m-d}.log`
gDEFAULT_FILE_POOL_FLAGS = os.O_CREATE | os.O_WRONLY | os.O_APPEND
gDEFAULT_FPOOL_PERM = os.FileMode(0666)
gDEFAULT_FPOOL_EXPIRE = 60000
gPATH_FILTER_KEY = "/os/glog/glog"
)
const (
F_ASYNC = 1 << iota // Print logging content asynchronously。
F_FILE_LONG // Print full file name and line number: /a/b/c/d.go:23.
F_FILE_SHORT // Print final file name element and line number: d.go:23. overrides F_FILE_LONG.
F_TIME_DATE // Print the date in the local time zone: 2009-01-23.
F_TIME_TIME // Print the time in the local time zone: 01:23:23.
F_TIME_MILLI // Print the time with milliseconds in the local time zone: 01:23:23.675.
F_TIME_STD = F_TIME_DATE | F_TIME_MILLI
)
// New creates and returns a custom logger.
func New() *Logger {
return &Logger{
config: DefaultConfig(),
}
}
// NewWithWriter creates and returns a custom logger with io.Writer.
func NewWithWriter(writer io.Writer) *Logger {
l := New()
l.SetWriter(writer)
return l
}
// Clone returns a new logger, which is the clone the current logger.
func (l *Logger) Clone() *Logger {
logger := Logger{}
logger = *l
logger.parent = l
return &logger
}
// getFilePointer returns the file pinter for file logging.
// It returns nil if file logging is disabled, or file opening fails.
func (l *Logger) getFilePointer() *gfpool.File {
if path := l.config.Path; path != "" {
// Content containing "{}" in the file name is formatted using gtime.
file, _ := gregex.ReplaceStringFunc(`{.+?}`, l.config.File, func(s string) string {
return gtime.Now().Format(strings.Trim(s, "{}"))
})
// Create path if it does not exist.
if !gfile.Exists(path) {
if err := gfile.Mkdir(path); err != nil {
fmt.Fprintln(os.Stderr, fmt.Sprintf(`[glog] mkdir "%s" failed: %s`, path, err.Error()))
return nil
}
}
if fp, err := gfpool.Open(
path+gfile.Separator+file,
gDEFAULT_FILE_POOL_FLAGS,
gDEFAULT_FPOOL_PERM,
gDEFAULT_FPOOL_EXPIRE); err == nil {
return fp
} else {
fmt.Fprintln(os.Stderr, err)
}
}
return nil
}
// print prints <s> to defined writer, logging file or passed <std>.
func (l *Logger) print(std io.Writer, lead string, value ...interface{}) {
buffer := bytes.NewBuffer(nil)
if l.config.HeaderPrint {
// Time.
timeFormat := ""
if l.config.Flags&F_TIME_DATE > 0 {
timeFormat += "2006-01-02 "
}
if l.config.Flags&F_TIME_TIME > 0 {
timeFormat += "15:04:05 "
}
if l.config.Flags&F_TIME_MILLI > 0 {
timeFormat += "15:04:05.000 "
}
if len(timeFormat) > 0 {
buffer.WriteString(time.Now().Format(timeFormat))
}
// Lead string.
if len(lead) > 0 {
buffer.WriteString(lead)
if len(value) > 0 {
buffer.WriteByte(' ')
}
}
// Caller path.
callerPath := ""
if l.config.Flags&F_FILE_LONG > 0 {
_, path, line := gdebug.CallerWithFilter(gPATH_FILTER_KEY, l.config.StSkip)
callerPath = fmt.Sprintf(`%s:%d: `, path, line)
}
if l.config.Flags&F_FILE_SHORT > 0 {
_, path, line := gdebug.CallerWithFilter(gPATH_FILTER_KEY, l.config.StSkip)
callerPath = fmt.Sprintf(`%s:%d: `, gfile.Basename(path), line)
}
if len(callerPath) > 0 {
buffer.WriteString(callerPath)
}
// Prefix.
if len(l.config.Prefix) > 0 {
buffer.WriteString(l.config.Prefix + " ")
}
}
// Convert value to string.
tempStr := ""
valueStr := ""
for _, v := range value {
if err, ok := v.(error); ok {
tempStr = fmt.Sprintf("%+v", err)
} else {
tempStr = gconv.String(v)
}
if len(valueStr) > 0 {
if valueStr[len(valueStr)-1] == '\n' {
// Remove one blank line(\n\n).
if tempStr[0] == '\n' {
valueStr += tempStr[1:]
} else {
valueStr += tempStr
}
} else {
valueStr += " " + tempStr
}
} else {
valueStr = tempStr
}
}
buffer.WriteString(valueStr + "\n")
if l.config.Flags&F_ASYNC > 0 {
err := asyncPool.Add(func() {
l.printToWriter(std, buffer)
})
if err != nil {
intlog.Error(err)
}
} else {
l.printToWriter(std, buffer)
}
}
// printToWriter writes buffer to writer.
func (l *Logger) printToWriter(std io.Writer, buffer *bytes.Buffer) {
if l.config.Writer == nil {
if f := l.getFilePointer(); f != nil {
defer f.Close()
if _, err := io.WriteString(f, buffer.String()); err != nil {
fmt.Fprintln(os.Stderr, err.Error())
}
}
// Allow output to stdout?
if l.config.StdoutPrint {
if _, err := std.Write(buffer.Bytes()); err != nil {
fmt.Fprintln(os.Stderr, err.Error())
}
}
} else {
if _, err := l.config.Writer.Write(buffer.Bytes()); err != nil {
fmt.Fprintln(os.Stderr, err.Error())
}
}
}
// printStd prints content <s> without stack.
func (l *Logger) printStd(lead string, value ...interface{}) {
l.print(os.Stdout, lead, value...)
}
// printStd prints content <s> with stack check.
func (l *Logger) printErr(lead string, value ...interface{}) {
if l.config.StStatus == 1 {
if s := l.GetStack(); s != "" {
value = append(value, "\nStack:\n"+s)
}
}
// In matter of sequence, do not use stderr here, but use the same stdout.
l.print(os.Stdout, lead, value...)
}
// format formats <values> using fmt.Sprintf.
func (l *Logger) format(format string, value ...interface{}) string {
return fmt.Sprintf(format, value...)
}
// PrintStack prints the caller stack,
// the optional parameter <skip> specify the skipped stack offset from the end point.
func (l *Logger) PrintStack(skip ...int) {
if s := l.GetStack(skip...); s != "" {
l.Println("Stack:\n" + s)
} else {
l.Println()
}
}
// GetStack returns the caller stack content,
// the optional parameter <skip> specify the skipped stack offset from the end point.
func (l *Logger) GetStack(skip ...int) string {
stackSkip := l.config.StSkip
if len(skip) > 0 {
stackSkip += skip[0]
}
filters := []string{gPATH_FILTER_KEY}
if l.config.StFilter != "" {
filters = append(filters, l.config.StFilter)
}
return gdebug.StackWithFilters(filters, stackSkip)
}