641 lines
15 KiB
Go
641 lines
15 KiB
Go
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package logger
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import (
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"fmt"
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"reflect"
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"strconv"
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"time"
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"codeberg.org/gruf/go-bytes"
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)
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// Check our types impl LogFormat
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var _ LogFormat = &TextFormat{}
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// LogFormat defines a method of formatting log entries
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type LogFormat interface {
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AppendLevel(buf *bytes.Buffer, lvl LEVEL)
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AppendTimestamp(buf *bytes.Buffer, fmtNow string)
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AppendField(buf *bytes.Buffer, key string, value interface{})
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AppendFields(buf *bytes.Buffer, fields map[string]interface{})
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AppendByteField(buf *bytes.Buffer, key string, value byte)
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AppendBytesField(buf *bytes.Buffer, key string, value []byte)
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AppendStringField(buf *bytes.Buffer, key string, value string)
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AppendStringsField(buf *bytes.Buffer, key string, value []string)
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AppendBoolField(buf *bytes.Buffer, key string, value bool)
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AppendBoolsField(buf *bytes.Buffer, key string, value []bool)
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AppendIntField(buf *bytes.Buffer, key string, value int)
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AppendIntsField(buf *bytes.Buffer, key string, value []int)
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AppendUintField(buf *bytes.Buffer, key string, value uint)
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AppendUintsField(buf *bytes.Buffer, key string, value []uint)
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AppendFloatField(buf *bytes.Buffer, key string, value float64)
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AppendFloatsField(buf *bytes.Buffer, key string, value []float64)
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AppendTimeField(buf *bytes.Buffer, key string, value time.Time)
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AppendTimesField(buf *bytes.Buffer, key string, value []time.Time)
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AppendDurationField(buf *bytes.Buffer, key string, value time.Duration)
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AppendDurationsField(buf *bytes.Buffer, key string, value []time.Duration)
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AppendMsg(buf *bytes.Buffer, a ...interface{})
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AppendMsgf(buf *bytes.Buffer, s string, a ...interface{})
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}
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// TextFormat is the default LogFormat implementation, with very similar formatting to logfmt
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type TextFormat struct {
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// Strict defines whether to use strict key-value pair formatting,
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// i.e. should the level, timestamp and msg be formatted as key-value pairs
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// or simply be printed as-is
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Strict bool
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// Levels defines the map of log LEVELs to level strings this LogFormat will use
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Levels Levels
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}
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// NewLogFmt returns a newly set LogFmt object, with DefaultLevels() set
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func NewLogFmt(strict bool) *TextFormat {
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return &TextFormat{
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Strict: strict,
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Levels: DefaultLevels(),
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}
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}
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// appendReflectValue will safely append a reflected value
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func appendReflectValue(buf *bytes.Buffer, v reflect.Value, isKey bool) {
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switch v.Kind() {
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case reflect.Slice:
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appendSliceType(buf, v)
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case reflect.Map:
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appendMapType(buf, v)
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case reflect.Struct:
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appendStructType(buf, v)
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case reflect.Ptr:
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if v.IsNil() {
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appendNil(buf)
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} else {
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appendIface(buf, v.Elem().Interface(), isKey)
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}
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default:
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// Just print reflect string
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appendString(buf, v.String())
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}
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}
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// appendKey should only be used in the case of directly setting key-value pairs,
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// not in the case of appendMapType, appendStructType
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func appendKey(buf *bytes.Buffer, key string) {
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if len(key) > 0 {
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// Only write key if here
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appendStringUnquoted(buf, key)
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buf.WriteByte('=')
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}
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}
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// appendSlice performs provided fn and writes square brackets [] around it
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func appendSlice(buf *bytes.Buffer, fn func()) {
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buf.WriteByte('[')
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fn()
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buf.WriteByte(']')
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}
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// appendMap performs provided fn and writes curly braces {} around it
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func appendMap(buf *bytes.Buffer, fn func()) {
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buf.WriteByte('{')
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fn()
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buf.WriteByte('}')
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}
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// appendStruct performs provided fn and writes curly braces {} around it
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func appendStruct(buf *bytes.Buffer, fn func()) {
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buf.WriteByte('{')
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fn()
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buf.WriteByte('}')
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}
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// appendNil writes a nil value placeholder to buf
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func appendNil(buf *bytes.Buffer) {
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buf.WriteString(`<nil>`)
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}
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// appendByte writes a single byte to buf
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func appendByte(buf *bytes.Buffer, b byte) {
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buf.WriteByte(b)
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}
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// appendBytes writes a quoted byte slice to buf
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func appendBytes(buf *bytes.Buffer, b []byte) {
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buf.WriteByte('"')
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buf.Write(b)
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buf.WriteByte('"')
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}
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// appendBytesUnquoted writes a byte slice to buf as-is
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func appendBytesUnquoted(buf *bytes.Buffer, b []byte) {
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buf.Write(b)
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}
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// appendString writes a quoted string to buf
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func appendString(buf *bytes.Buffer, s string) {
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buf.WriteByte('"')
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buf.WriteString(s)
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buf.WriteByte('"')
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}
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// appendStringUnquoted writes a string as-is to buf
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func appendStringUnquoted(buf *bytes.Buffer, s string) {
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buf.WriteString(s)
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}
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// appendStringSlice writes a slice of strings to buf
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func appendStringSlice(buf *bytes.Buffer, s []string) {
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appendSlice(buf, func() {
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for _, s := range s {
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appendString(buf, s)
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buf.WriteByte(',')
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}
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if len(s) > 0 {
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buf.Truncate(1)
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}
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})
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}
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// appendBool writes a formatted bool to buf
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func appendBool(buf *bytes.Buffer, b bool) {
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buf.B = strconv.AppendBool(buf.B, b)
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}
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// appendBool writes a slice of formatted bools to buf
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func appendBoolSlice(buf *bytes.Buffer, b []bool) {
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appendSlice(buf, func() {
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// Write elements
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for _, b := range b {
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appendBool(buf, b)
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buf.WriteByte(',')
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}
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// Drop last comma
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if len(b) > 0 {
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buf.Truncate(1)
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}
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})
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}
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// appendInt writes a formatted int to buf
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func appendInt(buf *bytes.Buffer, i int64) {
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buf.B = strconv.AppendInt(buf.B, i, 10)
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}
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// appendIntSlice writes a slice of formatted int to buf
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func appendIntSlice(buf *bytes.Buffer, i []int) {
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appendSlice(buf, func() {
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// Write elements
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for _, i := range i {
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appendInt(buf, int64(i))
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buf.WriteByte(',')
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}
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// Drop last comma
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if len(i) > 0 {
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buf.Truncate(1)
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}
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})
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}
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// appendUint writes a formatted uint to buf
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func appendUint(buf *bytes.Buffer, u uint64) {
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buf.B = strconv.AppendUint(buf.B, u, 10)
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}
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// appendUintSlice writes a slice of formatted uint to buf
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func appendUintSlice(buf *bytes.Buffer, u []uint) {
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appendSlice(buf, func() {
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// Write elements
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for _, u := range u {
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appendUint(buf, uint64(u))
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buf.WriteByte(',')
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}
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// Drop last comma
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if len(u) > 0 {
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buf.Truncate(1)
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}
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})
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}
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// appendFloat writes a formatted float to buf
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func appendFloat(buf *bytes.Buffer, f float64) {
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buf.B = strconv.AppendFloat(buf.B, f, 'G', -1, 64)
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}
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// appendFloatSlice writes a slice formatted floats to buf
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func appendFloatSlice(buf *bytes.Buffer, f []float64) {
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appendSlice(buf, func() {
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// Write elements
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for _, f := range f {
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appendFloat(buf, f)
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buf.WriteByte(',')
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}
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// Drop last comma
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if len(f) > 0 {
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buf.Truncate(1)
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}
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})
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}
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// appendTime writes a formatted, quoted time string to buf
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func appendTime(buf *bytes.Buffer, t time.Time) {
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buf.WriteByte('"')
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buf.B = t.AppendFormat(buf.B, time.RFC1123)
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buf.WriteByte('"')
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}
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// appendTimeUnquoted writes a formatted time string to buf as-is
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func appendTimeUnquoted(buf *bytes.Buffer, t time.Time) {
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buf.B = t.AppendFormat(buf.B, time.RFC1123)
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}
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// appendTimeSlice writes a slice of formatted time strings to buf
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func appendTimeSlice(buf *bytes.Buffer, t []time.Time) {
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appendSlice(buf, func() {
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// Write elements
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for _, t := range t {
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appendTime(buf, t)
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buf.WriteByte(',')
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}
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// Drop last comma
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if len(t) > 0 {
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buf.Truncate(1)
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}
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})
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}
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// appendDuration writes a formatted, quoted duration string to buf
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func appendDuration(buf *bytes.Buffer, d time.Duration) {
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appendString(buf, d.String())
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}
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// appendDurationUnquoted writes a formatted duration string to buf as-is
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func appendDurationUnquoted(buf *bytes.Buffer, d time.Duration) {
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appendStringUnquoted(buf, d.String())
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}
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// appendDurationSlice writes a slice of formatted, quoted duration strings to buf
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func appendDurationSlice(buf *bytes.Buffer, d []time.Duration) {
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appendSlice(buf, func() {
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// Write elements
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for _, d := range d {
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appendString(buf, d.String())
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buf.WriteByte(',')
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}
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// Drop last comma
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if len(d) > 0 {
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buf.Truncate(1)
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}
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})
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}
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// appendIface parses and writes a formatted interface value to buf
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func appendIface(buf *bytes.Buffer, i interface{}, isKey bool) {
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switch i := i.(type) {
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case nil:
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appendNil(buf)
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case byte:
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appendByte(buf, i)
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case []byte:
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if isKey {
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// Keys don't get quoted
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appendBytesUnquoted(buf, i)
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} else {
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appendBytes(buf, i)
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}
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case string:
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if isKey {
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// Keys don't get quoted
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appendStringUnquoted(buf, i)
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} else {
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appendString(buf, i)
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}
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case []string:
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appendStringSlice(buf, i)
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case int:
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appendInt(buf, int64(i))
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case int8:
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appendInt(buf, int64(i))
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case int16:
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appendInt(buf, int64(i))
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case int32:
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appendInt(buf, int64(i))
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case int64:
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appendInt(buf, i)
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case []int:
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appendIntSlice(buf, i)
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case uint:
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appendUint(buf, uint64(i))
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case uint16:
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appendUint(buf, uint64(i))
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case uint32:
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appendUint(buf, uint64(i))
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case uint64:
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appendUint(buf, i)
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case []uint:
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appendUintSlice(buf, i)
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case float32:
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appendFloat(buf, float64(i))
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case float64:
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appendFloat(buf, i)
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case []float64:
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appendFloatSlice(buf, i)
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case bool:
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appendBool(buf, i)
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case []bool:
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appendBoolSlice(buf, i)
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case time.Time:
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if isKey {
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// Keys don't get quoted
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appendTimeUnquoted(buf, i)
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} else {
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appendTime(buf, i)
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}
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case *time.Time:
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if isKey {
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// Keys don't get quoted
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appendTimeUnquoted(buf, *i)
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} else {
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appendTime(buf, *i)
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}
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case []time.Time:
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appendTimeSlice(buf, i)
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case time.Duration:
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if isKey {
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// Keys dont get quoted
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appendDurationUnquoted(buf, i)
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} else {
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appendDuration(buf, i)
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}
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case []time.Duration:
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appendDurationSlice(buf, i)
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case map[string]interface{}:
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appendIfaceMap(buf, i)
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case error:
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if isKey {
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// Keys don't get quoted
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appendStringUnquoted(buf, i.Error())
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} else {
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appendString(buf, i.Error())
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}
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case fmt.Stringer:
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if isKey {
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// Keys don't get quoted
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appendStringUnquoted(buf, i.String())
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} else {
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appendString(buf, i.String())
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}
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default:
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// If we reached here, we need reflection.
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|
|
appendReflectValue(buf, reflect.ValueOf(i), isKey)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// appendIfaceMap writes a map of key-value pairs (as a set of fields) to buf
|
||
|
|
func appendIfaceMap(buf *bytes.Buffer, v map[string]interface{}) {
|
||
|
|
appendMap(buf, func() {
|
||
|
|
// Write map pairs!
|
||
|
|
for key, value := range v {
|
||
|
|
appendStringUnquoted(buf, key)
|
||
|
|
buf.WriteByte('=')
|
||
|
|
appendIface(buf, value, false)
|
||
|
|
buf.WriteByte(' ')
|
||
|
|
}
|
||
|
|
|
||
|
|
// Drop last space
|
||
|
|
if len(v) > 0 {
|
||
|
|
buf.Truncate(1)
|
||
|
|
}
|
||
|
|
})
|
||
|
|
}
|
||
|
|
|
||
|
|
// appendSliceType writes a slice of unknown type (parsed by reflection) to buf
|
||
|
|
func appendSliceType(buf *bytes.Buffer, v reflect.Value) {
|
||
|
|
n := v.Len()
|
||
|
|
appendSlice(buf, func() {
|
||
|
|
for i := 0; i < n; i++ {
|
||
|
|
appendIface(buf, v.Index(i).Interface(), false)
|
||
|
|
buf.WriteByte(',')
|
||
|
|
}
|
||
|
|
|
||
|
|
// Drop last comma
|
||
|
|
if n > 0 {
|
||
|
|
buf.Truncate(1)
|
||
|
|
}
|
||
|
|
})
|
||
|
|
}
|
||
|
|
|
||
|
|
// appendMapType writes a map of unknown types (parsed by reflection) to buf
|
||
|
|
func appendMapType(buf *bytes.Buffer, v reflect.Value) {
|
||
|
|
// Get a map iterator
|
||
|
|
r := v.MapRange()
|
||
|
|
n := v.Len()
|
||
|
|
|
||
|
|
// Now begin creating the map!
|
||
|
|
appendMap(buf, func() {
|
||
|
|
// Iterate pairs
|
||
|
|
for r.Next() {
|
||
|
|
appendIface(buf, r.Key().Interface(), true)
|
||
|
|
buf.WriteByte('=')
|
||
|
|
appendIface(buf, r.Value().Interface(), false)
|
||
|
|
buf.WriteByte(' ')
|
||
|
|
}
|
||
|
|
|
||
|
|
// Drop last space
|
||
|
|
if n > 0 {
|
||
|
|
buf.Truncate(1)
|
||
|
|
}
|
||
|
|
})
|
||
|
|
}
|
||
|
|
|
||
|
|
// appendStructType writes a struct (as a set of key-value fields) to buf
|
||
|
|
func appendStructType(buf *bytes.Buffer, v reflect.Value) {
|
||
|
|
// Get value type & no. fields
|
||
|
|
t := v.Type()
|
||
|
|
n := v.NumField()
|
||
|
|
w := 0
|
||
|
|
|
||
|
|
// Iter and write struct fields
|
||
|
|
appendStruct(buf, func() {
|
||
|
|
for i := 0; i < n; i++ {
|
||
|
|
vfield := v.Field(i)
|
||
|
|
|
||
|
|
// Check for unexported fields
|
||
|
|
if !vfield.CanInterface() {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
|
||
|
|
// Append the struct member as field key-value
|
||
|
|
appendStringUnquoted(buf, t.Field(i).Name)
|
||
|
|
buf.WriteByte('=')
|
||
|
|
appendIface(buf, vfield.Interface(), false)
|
||
|
|
buf.WriteByte(' ')
|
||
|
|
|
||
|
|
// Iter written count
|
||
|
|
w++
|
||
|
|
}
|
||
|
|
|
||
|
|
// Drop last space
|
||
|
|
if w > 0 {
|
||
|
|
buf.Truncate(1)
|
||
|
|
}
|
||
|
|
})
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendLevel(buf *bytes.Buffer, lvl LEVEL) {
|
||
|
|
if f.Strict {
|
||
|
|
// Strict format, append level key
|
||
|
|
buf.WriteString(`level=`)
|
||
|
|
buf.WriteString(f.Levels.LevelString(lvl))
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// Write level string
|
||
|
|
buf.WriteByte('[')
|
||
|
|
buf.WriteString(f.Levels.LevelString(lvl))
|
||
|
|
buf.WriteByte(']')
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendTimestamp(buf *bytes.Buffer, now string) {
|
||
|
|
if f.Strict {
|
||
|
|
// Strict format, use key and quote
|
||
|
|
appendStringUnquoted(buf, `time`)
|
||
|
|
buf.WriteByte('=')
|
||
|
|
appendString(buf, now)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// Write time as-is
|
||
|
|
appendStringUnquoted(buf, now)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendField(buf *bytes.Buffer, key string, value interface{}) {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendIface(buf, value, false)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendFields(buf *bytes.Buffer, fields map[string]interface{}) {
|
||
|
|
// Append individual fields
|
||
|
|
for key, value := range fields {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendIface(buf, value, false)
|
||
|
|
buf.WriteByte(' ')
|
||
|
|
}
|
||
|
|
|
||
|
|
// Drop last space
|
||
|
|
if len(fields) > 0 {
|
||
|
|
buf.Truncate(1)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendByteField(buf *bytes.Buffer, key string, value byte) {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendByte(buf, value)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendBytesField(buf *bytes.Buffer, key string, value []byte) {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendBytes(buf, value)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendStringField(buf *bytes.Buffer, key string, value string) {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendString(buf, value)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendStringsField(buf *bytes.Buffer, key string, value []string) {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendStringSlice(buf, value)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendBoolField(buf *bytes.Buffer, key string, value bool) {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendBool(buf, value)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendBoolsField(buf *bytes.Buffer, key string, value []bool) {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendBoolSlice(buf, value)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendIntField(buf *bytes.Buffer, key string, value int) {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendInt(buf, int64(value))
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendIntsField(buf *bytes.Buffer, key string, value []int) {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendIntSlice(buf, value)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendUintField(buf *bytes.Buffer, key string, value uint) {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendUint(buf, uint64(value))
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendUintsField(buf *bytes.Buffer, key string, value []uint) {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendUintSlice(buf, value)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendFloatField(buf *bytes.Buffer, key string, value float64) {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendFloat(buf, value)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendFloatsField(buf *bytes.Buffer, key string, value []float64) {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendFloatSlice(buf, value)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendTimeField(buf *bytes.Buffer, key string, value time.Time) {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendTime(buf, value)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendTimesField(buf *bytes.Buffer, key string, value []time.Time) {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendTimeSlice(buf, value)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendDurationField(buf *bytes.Buffer, key string, value time.Duration) {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendDuration(buf, value)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendDurationsField(buf *bytes.Buffer, key string, value []time.Duration) {
|
||
|
|
appendKey(buf, key)
|
||
|
|
appendDurationSlice(buf, value)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendMsg(buf *bytes.Buffer, a ...interface{}) {
|
||
|
|
if f.Strict {
|
||
|
|
// Strict format, use key and quote
|
||
|
|
buf.WriteString(`msg="`)
|
||
|
|
fmt.Fprint(buf, a...)
|
||
|
|
buf.WriteByte('"')
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// Write message as-is
|
||
|
|
fmt.Fprint(buf, a...)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (f *TextFormat) AppendMsgf(buf *bytes.Buffer, s string, a ...interface{}) {
|
||
|
|
if f.Strict {
|
||
|
|
// Strict format, use key and quote
|
||
|
|
buf.WriteString(`msg="`)
|
||
|
|
fmt.Fprintf(buf, s, a...)
|
||
|
|
buf.WriteByte('"')
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// Write message as-is
|
||
|
|
fmt.Fprintf(buf, s, a...)
|
||
|
|
}
|