/
logging.go
557 lines (443 loc) · 9.97 KB
/
logging.go
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package common
import (
"encoding/json"
"flag"
"fmt"
"github.com/gookit/color"
"github.com/kardianos/service"
"io"
"os"
"os/exec"
"strconv"
"strings"
"sync"
"time"
)
const (
// DB level
LEVEL_PROLOG = iota
// LEVEL_DEBUG level
LEVEL_DEBUG
// LEVEL_INFO level
LEVEL_INFO
// LEVEL_ERROR level
LEVEL_WARN
// LEVEL_ERROR level
LEVEL_ERROR
)
var (
FlagLogVerbose *bool
FlagLogIO *bool
FlagLogFileName *string
FlagLogFileSize *int64
FlagLogJson *bool
FlagLogSys *bool
logger logWriter
defaultLogFilename string
mu sync.Mutex
lastErr string
lastErrTime time.Time
systemLoggerCh chan<- error
systemLogger service.Logger
gotest goTesting
)
const (
FlagNameLogFileName = "log.file"
FlagNameLogFileSize = "log.filesize"
FlagNameLogVerbose = "log.verbose"
FlagNameLogIO = "log.io"
FlagNameLogJson = "log.json"
FlagNameLogSys = "log.sys"
)
func init() {
defaultLogFilename = CleanPath(AppFilename(".log"))
FlagLogFileName = flag.String(FlagNameLogFileName, "", fmt.Sprintf("filename to log logFile (use \".\" for %s)", defaultLogFilename))
FlagLogFileSize = flag.Int64(FlagNameLogFileSize, 5*1024*1024, "max log file size")
FlagLogVerbose = flag.Bool(FlagNameLogVerbose, false, "verbose logging")
FlagLogIO = flag.Bool(FlagNameLogIO, false, "trace logging")
FlagLogJson = flag.Bool(FlagNameLogJson, false, "JSON output")
FlagLogSys = flag.Bool(FlagNameLogSys, false, "Use OS system logger")
}
func InitTesting(v goTesting) {
gotest = v
}
type goTesting interface {
Logf(format string, args ...interface{})
Fatalf(format string, args ...interface{})
}
type logEntry struct {
levelInt int `json:"levelInt"`
Clock string `json:"clock"`
Level string `json:"level"`
Runtime string `json:"runtime"`
Msg string `json:"msg"`
}
func (l *logEntry) String(jsn bool, verbose bool) string {
if jsn {
ba, _ := json.Marshal(l)
return string(ba)
} else {
if verbose {
return fmt.Sprintf("%s %s %-40.40s %s", l.Clock, FillString(l.Level, 5, false, " "), l.Runtime, l.Msg)
} else {
return l.Msg
}
}
}
type logWriter interface {
WriteString(int, string)
Logs(io.Writer) error
Close()
}
type memoryWriter struct {
lines []string
}
func (this *memoryWriter) WriteString(level int, txt string) {
if level == LEVEL_PROLOG {
return
}
if len(this.lines) == 1000 {
this.lines = this.lines[1:]
}
this.lines = append(this.lines, txt)
}
func (this *memoryWriter) Logs(w io.Writer) error {
for _, l := range this.lines {
_, err := w.Write([]byte(l))
if Error(err) {
return err
}
}
return nil
}
func (this *memoryWriter) Close() {
}
func newMemoryWriter() *memoryWriter {
writer := memoryWriter{
lines: make([]string, 0),
}
return &writer
}
type fileWriter struct {
filesize int64
file *os.File
}
func (this *fileWriter) WriteString(level int, txt string) {
if this.file == nil {
return
}
if this.filesize >= *FlagLogFileSize {
this.filesize = 0
if this.file != nil {
Ignore(this.file.Close())
this.file = nil
}
Ignore(FileBackup(realLogFilename()))
this.file, _ = os.OpenFile(realLogFilename(), os.O_RDWR|os.O_CREATE|os.O_APPEND, DefaultFileMode)
}
if this.file == nil {
return
}
ba := []byte(txt)
Ignore(this.file.Write(ba))
this.filesize += int64(len(ba))
}
func (this *fileWriter) Logs(w io.Writer) error {
for i := *FlagIoFileBackups; i >= 0; i-- {
var src string
if *FlagIoFileBackups == 1 {
src = realLogFilename() + ".bak"
if !fileExists(src) {
src = ""
}
}
if src == "" {
if i > 0 {
src = realLogFilename() + "." + strconv.Itoa(i)
} else {
src = realLogFilename()
}
}
file, err := os.Open(src)
if err != nil {
continue
}
_, err = io.Copy(w, file)
_ = file.Close()
if Error(err) {
return err
}
}
return nil
}
func (this *fileWriter) Close() {
if this.file != nil {
Ignore(this.file.Close())
this.file = nil
}
}
func newFileWriter() (*fileWriter, error) {
filesize := int64(0)
if FileExists(realLogFilename()) {
var err error
filesize, err = FileSize(realLogFilename())
if Error(err) {
return nil, err
}
}
logFile, err := os.OpenFile(realLogFilename(), os.O_RDWR|os.O_CREATE|os.O_APPEND, DefaultFileMode)
if Error(err) {
return nil, err
}
writer := fileWriter{
file: logFile,
filesize: filesize,
}
return &writer, nil
}
func levelToString(level int) string {
switch level {
case LEVEL_DEBUG:
return "DEBUG"
case LEVEL_INFO:
return "INFO"
case LEVEL_WARN:
return "WARN"
case LEVEL_ERROR:
return "ERROR"
default:
return "INFO"
}
}
func initLog() {
DebugFunc()
if realLogFilename() != "" {
var err error
logger, err = newFileWriter()
Error(err)
}
if logger == nil {
logger = newMemoryWriter()
}
if *FlagLogSys && !IsRunningInteractive() {
systemLoggerCh = make(chan error, 5)
var err error
systemLogger, err = app.Service.Logger(systemLoggerCh)
Error(err)
}
if app != nil {
prolog(fmt.Sprintf(">>> Start - %s %s %s", strings.ToUpper(app.Name), app.Version, strings.Repeat("-", 98)))
prolog(fmt.Sprintf(">>> Cmdline : %s", strings.Join(SurroundWith(os.Args, "\""), " ")))
}
}
func closeLogFile() {
prolog(fmt.Sprintf("<<< End - %s %s %s", strings.ToUpper(app.Name), app.Version, strings.Repeat("-", 100)))
if logger != nil {
logger.Close()
}
}
// logFile prints out the information
func prolog(t string, arg ...interface{}) {
if len(arg) > 0 {
t = fmt.Sprintf(t, arg...)
}
log(LEVEL_PROLOG, GetRuntimeInfo(1), t, nil)
}
// Debug prints out the information
func Debug(t string, arg ...interface{}) {
if FlagLogVerbose == nil || !*FlagLogVerbose {
return
}
if len(arg) > 0 {
t = fmt.Sprintf(t, arg...)
}
log(LEVEL_DEBUG, GetRuntimeInfo(1), t, nil)
}
// DebugError prints out the error
func DebugError(err error) bool {
if FlagLogVerbose == nil || !*FlagLogVerbose {
return err != nil
}
if err != nil && !IsErrExit(err) {
ri := GetRuntimeInfo(1)
log(LEVEL_DEBUG, ri, fmt.Sprintf("Error: %s", errorString(ri, err)), nil)
}
return err != nil
}
// Info prints out the information
func Info(t string, arg ...interface{}) {
if FlagLogVerbose == nil {
return
}
if len(arg) > 0 {
t = fmt.Sprintf(t, arg...)
}
log(LEVEL_INFO, GetRuntimeInfo(1), t, nil)
}
// Warn prints out the information
func Warn(t string, arg ...interface{}) {
if FlagLogVerbose == nil {
return
}
if len(arg) > 0 {
t = fmt.Sprintf(t, arg...)
}
log(LEVEL_WARN, GetRuntimeInfo(1), t, nil)
}
func WarnError(err error) bool {
if FlagLogVerbose == nil {
return err != nil
}
if err != nil && !IsErrExit(err) {
ri := GetRuntimeInfo(1)
log(LEVEL_WARN, ri, fmt.Sprintf("Error: %s", errorString(ri, err)), nil)
}
return err != nil
}
func errorString(ri RuntimeInfo, err error) string {
if *FlagLogVerbose {
return fmt.Sprintf("%s [%T]\n%s", err.Error(), err, ri.Stack)
}
return fmt.Sprintf("Error: %s", err.Error())
}
// DebugFunc prints out the current executon func
func DebugFunc(arg ...interface{}) {
if FlagLogVerbose == nil || !*FlagLogVerbose {
return
}
ri := GetRuntimeInfo(1)
t := ri.Fn + "()"
if len(arg) == 1 {
t = fmt.Sprintf("%s: %v", t, arg[0])
}
if len(arg) > 1 {
s, ok := arg[0].(string)
if ok {
t = fmt.Sprintf("%s: %s", t, fmt.Sprintf(s, arg[1:]...))
} else {
t = fmt.Sprintf("%s: %s", t, fmt.Sprintf("%v", arg[1:]...))
}
}
log(LEVEL_DEBUG, ri, t, nil)
}
// Ignore just ignores the error
func Ignore(arg ...interface{}) bool {
b := false
if len(arg) > 0 {
_, b = arg[len(arg)-1].(error)
}
return b
}
func Panic(err error) {
if err == nil {
return
}
ri := GetRuntimeInfo(1)
log(LEVEL_ERROR, ri, errorString(ri, err), err)
Exit(1)
}
func Error(err error) bool {
if FlagLogVerbose == nil {
return err != nil
}
if err != nil && !IsErrExit(err) {
ri := GetRuntimeInfo(1)
log(LEVEL_ERROR, ri, errorString(ri, err), err)
}
return err != nil
}
func ErrorReturn(err error) error {
if FlagLogVerbose == nil {
return err
}
if err != nil && !IsErrExit(err) {
ri := GetRuntimeInfo(1)
log(LEVEL_ERROR, ri, errorString(ri, err), err)
}
return err
}
func log(level int, ri RuntimeInfo, msg string, err error) {
mu.Lock()
defer mu.Unlock()
if logger == nil {
return
}
if level == LEVEL_ERROR {
defer func() {
lastErr = err.Error()
lastErrTime = time.Now()
}()
if err.Error() == lastErr && time.Since(lastErrTime) < time.Millisecond*100 {
return
}
}
entry := logEntry{
levelInt: level,
Level: levelToString(level),
Clock: time.Now().Format(DateTimeMilliMask),
Runtime: ri.String(),
Msg: Capitalize(strings.TrimRight(strings.TrimSpace(msg), "\r\n")),
}
s := entry.String(*FlagLogJson, *FlagLogVerbose)
if logger != nil {
logger.WriteString(entry.levelInt, fmt.Sprintf("%s\n", s))
}
if level != LEVEL_PROLOG {
if *FlagLogVerbose {
switch entry.levelInt {
case LEVEL_WARN:
if gotest != nil {
gotest.Logf(s)
} else {
color.Warn.Println(s)
}
case LEVEL_ERROR:
if gotest != nil {
gotest.Fatalf(s)
} else {
color.Error.Println(s)
}
default:
if gotest != nil {
gotest.Logf(s)
} else {
fmt.Printf("%s\n", s)
}
}
} else {
fmt.Printf("%s\n", s)
}
if *FlagLogSys && systemLogger != nil {
switch entry.levelInt {
case LEVEL_WARN:
Error(systemLogger.Warning(entry.String(false, false)))
case LEVEL_ERROR:
Error(systemLogger.Error(entry.String(false, false)))
case LEVEL_DEBUG:
fallthrough
case LEVEL_INFO:
Error(systemLogger.Info(entry.String(false, false)))
}
}
}
}
func CmdToString(cmd *exec.Cmd) string {
s := SurroundWith(cmd.Args, "\"")
return strings.Join(s, " ")
}
func Logs(w io.Writer) error {
if logger == nil {
return fmt.Errorf("no logger")
}
return logger.Logs(w)
}
func LogsAvailable() bool {
return logger != nil
}
func realLogFilename() string {
if *FlagLogFileName == "." {
return defaultLogFilename
} else {
return *FlagLogFileName
}
}