forked from inconshreveable/log15
/
format.go
481 lines (433 loc) · 10.4 KB
/
format.go
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package log15
import (
"encoding/json"
"fmt"
"net"
"reflect"
"strings"
"sync"
"time"
"github.com/xiaomi-tc/log15/structured"
)
const (
//timeFormat = "2006-01-02T15:04:05-0700"
timeFormat = "2006/01/02 15:04:05"
termTimeFormat = "01-02|15:04:05"
floatFormat = 'f'
termMsgJust = 40
// DurationFieldUnit defines the unit for time.Duration type fields added
// using the Dur method.
DurationFieldUnit = time.Millisecond
// DurationFieldInteger renders Dur fields as integer instead of float if
// set to true.
DurationFieldInteger = false
)
var (
enc structured.Encoder
bufPool = &sync.Pool{
New: func() interface{} {
return make([]byte, 0, 256)
},
}
)
type Format interface {
Format(r *Record) []byte
}
// FormatFunc returns a new Format object which uses
// the given function to perform record formatting.
func FormatFunc(f func(*Record) []byte) Format {
return formatFunc(f)
}
type formatFunc func(*Record) []byte
func (f formatFunc) Format(r *Record) []byte {
return f(r)
}
// TerminalFormat formats log records optimized for human readability on
// a terminal with color-coded level output and terser human friendly timestamp.
// This format should only be used for interactive programs or while developing.
//
// [TIME] [LEVEL] MESAGE key=value key=value ...
//
// Example:
//
// [May 16 20:58:45] [DBUG] remove route ns=haproxy addr=127.0.0.1:50002
//
func TerminalFormat() Format {
return FormatFunc(func(r *Record) []byte {
var color = 0
switch r.Lvl {
case LvlCrit:
color = 35
case LvlError:
color = 31
case LvlWarn:
color = 33
case LvlInfo:
color = 32
case LvlDebug:
color = 36
}
var buf = make([]byte, 0, 256)
lvl := strings.ToUpper(r.Lvl.String())
// head
buf = appendColordString(buf, lvl, color)
buf = append(buf, ' ')
buf = append(buf, '[')
buf = enc.AppendTime(buf, r.Time, timeFormat)
buf = append(buf, "] ["...)
buf = append(buf, []byte(r.Call)...)
buf = append(buf, ']')
if r.RequestID != "" {
buf = append(buf, " ["...)
buf = append(buf, []byte(r.KeyNames.ReqID)...)
buf = append(buf, '=')
buf = append(buf, []byte(r.RequestID)...)
buf = append(buf, ']')
}
// msg
buf = append(buf, ' ')
buf = appendColordString(buf, r.KeyNames.Msg, color)
buf = append(buf, '=')
buf = enc.AppendString(buf, r.Msg)
// fields
buf = logfmt(buf, r.Ctx, color)
return buf
})
}
// LogfmtFormat prints records in logfmt format, an easy machine-parseable but human-readable
// format for key/value pairs.
//
// For more details see: http://godoc.org/github.com/kr/logfmt
//
func LogfmtFormat() Format {
return FormatFunc(func(r *Record) []byte {
// assignment in serial processing
logLevel = byte(r.Lvl)
logMetaKey = r.MetaK
logMetaValue = r.MetaV
var caller string
if r.CustomCaller == "" {
caller = r.Call
} else {
caller = r.CustomCaller
}
var buf = make([]byte, 0, 256)
// log head
buf = append(buf, '[')
buf = enc.AppendTime(buf, r.Time, timeFormat)
buf = append(buf, "] ["...)
buf = append(buf, []byte(r.Lvl.String())...)
buf = append(buf, "] ["...)
buf = append(buf, []byte(caller)...)
buf = append(buf, "] "...)
if r.RequestID != "" {
buf = append(buf, " ["...)
buf = append(buf, []byte(r.KeyNames.ReqID)...)
buf = append(buf, '=')
buf = append(buf, []byte(r.RequestID)...)
buf = append(buf, "] "...)
}
// msg
buf = appendFields(buf, r.KeyNames.Msg, r.Msg)
// fields
buf = logfmt(buf, r.Ctx, 0)
return buf
})
}
func logfmt(buf []byte, ctx []interface{}, color int) []byte {
var sz = len(ctx)
for i := 0; i < sz; i += 2 {
buf = append(buf, ' ')
k, ok := ctx[i].(string)
v := ctx[i+1]
if !ok {
k, v = errorKey, k
}
buf = appendColordString(buf, k, color)
buf = append(buf, '=')
buf = appendVal(buf, v)
}
buf = append(buf, '\n')
return buf
}
// JsonFormat formats log records as JSON objects separated by newlines.
// It is the equivalent of JsonFormatEx(false, true).
func JsonFormat() Format {
return JsonFormatEx(false, true)
}
// JsonFormatEx formats log records as JSON objects. If pretty is true,
// records will be pretty-printed. If lineSeparated is true, records
// will be logged with a new line between each record.
func JsonFormatEx(pretty, lineSeparated bool) Format {
jsonMarshal := json.Marshal
if pretty {
jsonMarshal = func(v interface{}) ([]byte, error) {
return json.MarshalIndent(v, "", " ")
}
}
return FormatFunc(func(r *Record) []byte {
props := make(map[string]interface{})
props[r.KeyNames.Time] = r.Time
props[r.KeyNames.Lvl] = r.Lvl.String()
props[r.KeyNames.Msg] = r.Msg
for i := 0; i < len(r.Ctx); i += 2 {
k, ok := r.Ctx[i].(string)
if !ok {
props[errorKey] = fmt.Sprintf("%+v is not a string key", r.Ctx[i])
}
props[k] = formatJsonValue(r.Ctx[i+1])
}
b, err := jsonMarshal(props)
if err != nil {
b, _ = jsonMarshal(map[string]string{
errorKey: err.Error(),
})
return b
}
if lineSeparated {
b = append(b, '\n')
}
return b
})
}
func formatShared(value interface{}) (result interface{}) {
defer func() {
if err := recover(); err != nil {
if v := reflect.ValueOf(value); v.Kind() == reflect.Ptr && v.IsNil() {
result = "nil"
} else {
panic(err)
}
}
}()
switch v := value.(type) {
case time.Time:
return v.Format(timeFormat)
case error:
return v.Error()
case fmt.Stringer:
return v.String()
default:
return v
}
}
func formatJsonValue(value interface{}) interface{} {
value = formatShared(value)
switch value.(type) {
case int, int8, int16, int32, int64, float32, float64, uint, uint8, uint16, uint32, uint64, string:
return value
default:
return fmt.Sprintf("%+v", value)
}
}
// formatValue formats a value for serialization
func formatLogfmtValue(value interface{}) string {
var buf = make([]byte, 0, 32)
buf = appendVal(buf, value)
return string(buf)
}
func appendColordString(dst []byte, k string, color int) []byte {
if color > 0 {
dst = append(dst, "\x1b["...)
dst = enc.AppendInt(dst, color)
dst = append(dst, 'm')
dst = append(dst, []byte(k)...)
dst = append(dst, "\x1b[0m"...)
} else {
dst = append(dst, []byte(k)...)
}
return dst
}
func appendFields(dst []byte, key string, val interface{}) []byte {
dst = enc.AppendKey(dst, key)
dst = appendVal(dst, val)
return dst
}
func appendVal(dst []byte, val interface{}) []byte {
switch val := val.(type) {
case string:
dst = enc.AppendString(dst, val)
case []byte:
dst = enc.AppendBytes(dst, val)
case error:
dst = enc.AppendString(dst, val.Error())
case []error:
dst = enc.AppendArrayStart(dst)
for i, err := range val {
dst = enc.AppendString(dst, err.Error())
if i < (len(val) - 1) {
enc.AppendArrayDelim(dst)
}
}
dst = enc.AppendArrayEnd(dst)
case bool:
dst = enc.AppendBool(dst, val)
case int:
dst = enc.AppendInt(dst, val)
case int8:
dst = enc.AppendInt8(dst, val)
case int16:
dst = enc.AppendInt16(dst, val)
case int32:
dst = enc.AppendInt32(dst, val)
case int64:
dst = enc.AppendInt64(dst, val)
case uint:
dst = enc.AppendUint(dst, val)
case uint8:
dst = enc.AppendUint8(dst, val)
case uint16:
dst = enc.AppendUint16(dst, val)
case uint32:
dst = enc.AppendUint32(dst, val)
case uint64:
dst = enc.AppendUint64(dst, val)
case float32:
dst = enc.AppendFloat32(dst, val)
case float64:
dst = enc.AppendFloat64(dst, val)
case time.Time:
dst = enc.AppendTime(dst, val, timeFormat)
case time.Duration:
dst = enc.AppendDuration(dst, val, DurationFieldUnit, DurationFieldInteger)
case *string:
if val != nil {
dst = enc.AppendString(dst, *val)
} else {
dst = enc.AppendNil(dst)
}
case *bool:
if val != nil {
dst = enc.AppendBool(dst, *val)
} else {
dst = enc.AppendNil(dst)
}
case *int:
if val != nil {
dst = enc.AppendInt(dst, *val)
} else {
dst = enc.AppendNil(dst)
}
case *int8:
if val != nil {
dst = enc.AppendInt8(dst, *val)
} else {
dst = enc.AppendNil(dst)
}
case *int16:
if val != nil {
dst = enc.AppendInt16(dst, *val)
} else {
dst = enc.AppendNil(dst)
}
case *int32:
if val != nil {
dst = enc.AppendInt32(dst, *val)
} else {
dst = enc.AppendNil(dst)
}
case *int64:
if val != nil {
dst = enc.AppendInt64(dst, *val)
} else {
dst = enc.AppendNil(dst)
}
case *uint:
if val != nil {
dst = enc.AppendUint(dst, *val)
} else {
dst = enc.AppendNil(dst)
}
case *uint8:
if val != nil {
dst = enc.AppendUint8(dst, *val)
} else {
dst = enc.AppendNil(dst)
}
case *uint16:
if val != nil {
dst = enc.AppendUint16(dst, *val)
} else {
dst = enc.AppendNil(dst)
}
case *uint32:
if val != nil {
dst = enc.AppendUint32(dst, *val)
} else {
dst = enc.AppendNil(dst)
}
case *uint64:
if val != nil {
dst = enc.AppendUint64(dst, *val)
} else {
dst = enc.AppendNil(dst)
}
case *float32:
if val != nil {
dst = enc.AppendFloat32(dst, *val)
} else {
dst = enc.AppendNil(dst)
}
case *float64:
if val != nil {
dst = enc.AppendFloat64(dst, *val)
} else {
dst = enc.AppendNil(dst)
}
case *time.Time:
if val != nil {
dst = enc.AppendTime(dst, *val, timeFormat)
} else {
dst = enc.AppendNil(dst)
}
case *time.Duration:
if val != nil {
dst = enc.AppendDuration(dst, *val, DurationFieldUnit, DurationFieldInteger)
} else {
dst = enc.AppendNil(dst)
}
case []string:
dst = enc.AppendStrings(dst, val)
case []bool:
dst = enc.AppendBools(dst, val)
case []int:
dst = enc.AppendInts(dst, val)
case []int8:
dst = enc.AppendInts8(dst, val)
case []int16:
dst = enc.AppendInts16(dst, val)
case []int32:
dst = enc.AppendInts32(dst, val)
case []int64:
dst = enc.AppendInts64(dst, val)
case []uint:
dst = enc.AppendUints(dst, val)
// case []uint8:
// dst = enc.AppendUints8(dst, val)
case []uint16:
dst = enc.AppendUints16(dst, val)
case []uint32:
dst = enc.AppendUints32(dst, val)
case []uint64:
dst = enc.AppendUints64(dst, val)
case []float32:
dst = enc.AppendFloats32(dst, val)
case []float64:
dst = enc.AppendFloats64(dst, val)
case []time.Time:
dst = enc.AppendTimes(dst, val, timeFormat)
case []time.Duration:
dst = enc.AppendDurations(dst, val, DurationFieldUnit, DurationFieldInteger)
case nil:
dst = enc.AppendNil(dst)
case net.IP:
dst = enc.AppendIPAddr(dst, val)
case net.IPNet:
dst = enc.AppendIPPrefix(dst, val)
case net.HardwareAddr:
dst = enc.AppendMACAddr(dst, val)
default:
dst = enc.AppendInterface(dst, val)
}
return dst
}