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add in-built logging support for a better dev experience

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Jesse Duffield
2020-09-26 10:23:10 +10:00
parent 0c6cbe7746
commit 077f113618
136 changed files with 6685 additions and 7711 deletions
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*.ignore
dist

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Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
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# humanlog
Read logs from `stdin` and prints them back to `stdout`, but prettier.
# Using it
[Grab a release](https://github.com/aybabtme/humanlog/releases) or :
## With Go installed
```bash
$ go get -u github.com/aybabtme/humanlog/...
```
## On linux
```bash
wget -qO- https://github.com/aybabtme/humanlog/releases/download/0.4.0/humanlog_Linux_x86_64.tar.gz | tar xvz
```
## On OS X
```bash
brew tap aybabtme/homebrew-tap
brew install humanlog
```
# Example
If you emit logs in JSON or in [`logfmt`](https://brandur.org/logfmt), you will enjoy pretty logs when those
entries are encountered by `humanlog`. Unrecognized lines are left unchanged.
```
$ humanlog < /var/log/logfile.log
```
![2__fish___users_antoine_gocode_src_github_com_aybabtme_humanlog__fish_](https://cloud.githubusercontent.com/assets/1189716/4328545/f2330bb4-3f86-11e4-8242-4f49f6ae9efc.png)
# Contributing
How to help:
* __support more log formats__: by submitting `human.Handler` implementations.
* __live querying__: add support for filtering in log output in real time.
* __charting__: some key-values have semantics that could be charted in real time. For
instance, durations, frequency of numeric values, etc. See the [l2met][] project.
# Usage
```
NAME:
humanlog - reads structured logs from stdin, makes them pretty on stdout!
USAGE:
humanlog [global options] command [command options] [arguments...]
VERSION:
0.4.0
AUTHOR:
Antoine Grondin - <antoine@digitalocean.com>
COMMANDS:
help, h Shows a list of commands or help for one command
GLOBAL OPTIONS:
--skip '--skip option --skip option' keys to skip when parsing a log entry
--keep '--keep option --keep option' keys to keep when parsing a log entry
--sort-longest sort by longest key after having sorted lexicographically
--skip-unchanged skip keys that have the same value than the previous entry
--truncate truncates values that are longer than --truncate-length
--truncate-length '15' truncate values that are longer than this length
--help, -h show help
--version, -v print the version
```
[l2met]: https://github.com/ryandotsmith/l2met

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package humanlog
import (
"regexp"
)
// dcLogsPrefixRe parses out a prefix like 'web_1 | ' from docker-compose
// The regex exists of five parts:
// 1. An optional color terminal escape sequence
// 2. The name of the service
// 3. Any number of spaces, and a pipe symbol
// 4. An optional color reset escape sequence
// 5. The rest of the line
var dcLogsPrefixRe = regexp.MustCompile("^(?:\x1b\\[\\d+m)?(?P<service_name>[a-zA-Z0-9._-]+)\\s+\\|(?:\x1b\\[0m)? (?P<rest_of_line>.*)$")
type handler interface {
TryHandle([]byte) bool
setField(key, val []byte)
}
func tryDockerComposePrefix(d []byte, nextHandler handler) bool {
if matches := dcLogsPrefixRe.FindSubmatch(d); matches != nil {
if nextHandler.TryHandle(matches[2]) {
nextHandler.setField([]byte(`service`), matches[1])
return true
}
}
return false
}

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module github.com/aybabtme/humanlog
go 1.13
require (
github.com/aybabtme/rgbterm v0.0.0-20170906152045-cc83f3b3ce59
github.com/fatih/color v1.7.1-0.20180516100307-2d684516a886
github.com/go-logfmt/logfmt v0.4.0
github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515
github.com/mattn/go-colorable v0.1.0
github.com/mattn/go-isatty v0.0.4 // indirect
github.com/urfave/cli v1.20.1-0.20180226030253-8e01ec4cd3e2
golang.org/x/sys v0.0.0-20170407050850-f3918c30c5c2 // indirect
)

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github.com/aybabtme/rgbterm v0.0.0-20170906152045-cc83f3b3ce59 h1:WWB576BN5zNSZc/M9d/10pqEx5VHNhaQ/yOVAkmj5Yo=
github.com/aybabtme/rgbterm v0.0.0-20170906152045-cc83f3b3ce59/go.mod h1:q/89r3U2H7sSsE2t6Kca0lfwTK8JdoNGS/yzM/4iH5I=
github.com/fatih/color v1.7.1-0.20180516100307-2d684516a886 h1:NAFoy+QgUpERgK3y1xiVh5HcOvSeZHpXTTo5qnvnuK4=
github.com/fatih/color v1.7.1-0.20180516100307-2d684516a886/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
github.com/go-logfmt/logfmt v0.4.0 h1:MP4Eh7ZCb31lleYCFuwm0oe4/YGak+5l1vA2NOE80nA=
github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515 h1:T+h1c/A9Gawja4Y9mFVWj2vyii2bbUNDw3kt9VxK2EY=
github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
github.com/mattn/go-colorable v0.1.0 h1:v2XXALHHh6zHfYTJ+cSkwtyffnaOyR1MXaA91mTrb8o=
github.com/mattn/go-colorable v0.1.0/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
github.com/mattn/go-isatty v0.0.4 h1:bnP0vzxcAdeI1zdubAl5PjU6zsERjGZb7raWodagDYs=
github.com/mattn/go-isatty v0.0.4/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNxMWT7Zi4=
github.com/urfave/cli v1.20.1-0.20180226030253-8e01ec4cd3e2 h1:xAkHCttGHKXIr10OSiFzNt0XOJyHMdng0ylSynT8sMo=
github.com/urfave/cli v1.20.1-0.20180226030253-8e01ec4cd3e2/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA=
golang.org/x/sys v0.0.0-20170407050850-f3918c30c5c2 h1:niKkabq6kYToDafvvFw9MeTkT4ifSvpOCRP6pFxOCZE=
golang.org/x/sys v0.0.0-20170407050850-f3918c30c5c2/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=

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build:
main: ./cmd/humanlog/main.go
binary: humanlog
ldflags:
- -s -w -X main.build={{.Version}}
goos:
- windows
- darwin
- linux
goarch:
- amd64
brews:
- github:
owner: aybabtme
name: homebrew-tap
nfpms:
- formats:
- deb

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package humanlog
import (
"time"
"github.com/fatih/color"
"github.com/kr/logfmt"
)
// Handler can recognize it's log lines, parse them and prettify them.
type Handler interface {
CanHandle(line []byte) bool
Prettify(skipUnchanged bool) []byte
logfmt.Handler
}
var DefaultOptions = &HandlerOptions{
SortLongest: true,
SkipUnchanged: true,
Truncates: true,
LightBg: false,
TruncateLength: 15,
TimeFormat: time.Stamp,
KeyColor: color.New(color.FgGreen),
ValColor: color.New(color.FgHiWhite),
TimeLightBgColor: color.New(color.FgBlack),
TimeDarkBgColor: color.New(color.FgWhite),
MsgLightBgColor: color.New(color.FgBlack),
MsgAbsentLightBgColor: color.New(color.FgHiBlack),
MsgDarkBgColor: color.New(color.FgHiWhite),
MsgAbsentDarkBgColor: color.New(color.FgWhite),
DebugLevelColor: color.New(color.FgMagenta),
InfoLevelColor: color.New(color.FgCyan),
WarnLevelColor: color.New(color.FgYellow),
ErrorLevelColor: color.New(color.FgRed),
PanicLevelColor: color.New(color.BgRed),
FatalLevelColor: color.New(color.BgHiRed, color.FgHiWhite),
UnknownLevelColor: color.New(color.FgMagenta),
}
type HandlerOptions struct {
Skip map[string]struct{}
Keep map[string]struct{}
SortLongest bool
SkipUnchanged bool
Truncates bool
LightBg bool
TruncateLength int
TimeFormat string
KeyColor *color.Color
ValColor *color.Color
TimeLightBgColor *color.Color
TimeDarkBgColor *color.Color
MsgLightBgColor *color.Color
MsgAbsentLightBgColor *color.Color
MsgDarkBgColor *color.Color
MsgAbsentDarkBgColor *color.Color
DebugLevelColor *color.Color
InfoLevelColor *color.Color
WarnLevelColor *color.Color
ErrorLevelColor *color.Color
PanicLevelColor *color.Color
FatalLevelColor *color.Color
UnknownLevelColor *color.Color
}
func (h *HandlerOptions) shouldShowKey(key string) bool {
if len(h.Keep) != 0 {
if _, keep := h.Keep[key]; keep {
return true
}
}
if len(h.Skip) != 0 {
if _, skip := h.Skip[key]; skip {
return false
}
}
return true
}
func (h *HandlerOptions) shouldShowUnchanged(key string) bool {
if len(h.Keep) != 0 {
if _, keep := h.Keep[key]; keep {
return true
}
}
return false
}
func (h *HandlerOptions) SetSkip(skip []string) {
if h.Skip == nil {
h.Skip = make(map[string]struct{})
}
for _, key := range skip {
h.Skip[key] = struct{}{}
}
}
func (h *HandlerOptions) SetKeep(keep []string) {
if h.Keep == nil {
h.Keep = make(map[string]struct{})
}
for _, key := range keep {
h.Keep[key] = struct{}{}
}
}

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package humanlog
import (
"bytes"
"encoding/json"
"fmt"
"math"
"sort"
"strings"
"text/tabwriter"
"time"
"github.com/fatih/color"
)
// JSONHandler can handle logs emmited by logrus.TextFormatter loggers.
type JSONHandler struct {
buf *bytes.Buffer
out *tabwriter.Writer
truncKV int
Opts *HandlerOptions
Level string
Time time.Time
Message string
Fields map[string]string
last map[string]string
}
func checkEachUntilFound(fieldList []string, found func(string) bool) bool {
for _, field := range fieldList {
if found(field) {
return true
}
}
return false
}
// supportedTimeFields enumerates supported timestamp field names
var supportedTimeFields = []string{"time", "ts", "@timestamp", "timestamp"}
// supportedMessageFields enumarates supported Message field names
var supportedMessageFields = []string{"message", "msg"}
// supportedLevelFields enumarates supported level field names
var supportedLevelFields = []string{"level", "lvl", "loglevel"}
func (h *JSONHandler) clear() {
h.Level = ""
h.Time = time.Time{}
h.Message = ""
h.last = h.Fields
h.Fields = make(map[string]string)
if h.buf != nil {
h.buf.Reset()
}
}
// TryHandle tells if this line was handled by this handler.
func (h *JSONHandler) TryHandle(d []byte) bool {
if !h.UnmarshalJSON(d) {
h.clear()
return false
}
return true
}
// UnmarshalJSON sets the fields of the handler.
func (h *JSONHandler) UnmarshalJSON(data []byte) bool {
raw := make(map[string]interface{})
err := json.Unmarshal(data, &raw)
if err != nil {
return false
}
checkEachUntilFound(supportedTimeFields, func(field string) bool {
time, ok := tryParseTime(raw[field])
if ok {
h.Time = time
delete(raw, field)
}
return ok
})
checkEachUntilFound(supportedMessageFields, func(field string) bool {
msg, ok := raw[field].(string)
if ok {
h.Message = msg
delete(raw, field)
}
return ok
})
checkEachUntilFound(supportedLevelFields, func(field string) bool {
lvl, ok := raw[field]
if !ok {
return false
}
if strLvl, ok := lvl.(string); ok {
h.Level = strLvl
} else if flLvl, ok := lvl.(float64); ok {
h.Level = convertBunyanLogLevel(flLvl)
} else {
h.Level = "???"
}
delete(raw, field)
return true
})
if h.Fields == nil {
h.Fields = make(map[string]string)
}
for key, val := range raw {
switch v := val.(type) {
case float64:
if v-math.Floor(v) < 0.000001 && v < 1e9 {
// looks like an integer that's not too large
h.Fields[key] = fmt.Sprintf("%d", int(v))
} else {
h.Fields[key] = fmt.Sprintf("%g", v)
}
case string:
h.Fields[key] = fmt.Sprintf("%q", v)
default:
h.Fields[key] = fmt.Sprintf("%v", v)
}
}
return true
}
func (h *JSONHandler) setField(key, val []byte) {
if h.Fields == nil {
h.Fields = make(map[string]string)
}
h.Fields[string(key)] = string(val)
}
// Prettify the output in a logrus like fashion.
func (h *JSONHandler) Prettify(skipUnchanged bool) []byte {
defer h.clear()
if h.out == nil {
if h.Opts == nil {
h.Opts = DefaultOptions
}
h.buf = bytes.NewBuffer(nil)
h.out = tabwriter.NewWriter(h.buf, 0, 1, 0, '\t', 0)
}
var (
msgColor *color.Color
msgAbsentColor *color.Color
)
if h.Opts.LightBg {
msgColor = h.Opts.MsgLightBgColor
msgAbsentColor = h.Opts.MsgAbsentLightBgColor
} else {
msgColor = h.Opts.MsgDarkBgColor
msgAbsentColor = h.Opts.MsgAbsentDarkBgColor
}
msgColor = color.New(color.FgHiWhite)
msgAbsentColor = color.New(color.FgHiWhite)
var msg string
if h.Message == "" {
msg = msgAbsentColor.Sprint("<no msg>")
} else {
msg = msgColor.Sprint(h.Message)
}
lvl := strings.ToUpper(h.Level)[:imin(4, len(h.Level))]
var level string
switch h.Level {
case "debug":
level = h.Opts.DebugLevelColor.Sprint(lvl)
case "info":
level = h.Opts.InfoLevelColor.Sprint(lvl)
case "warn", "warning":
level = h.Opts.WarnLevelColor.Sprint(lvl)
case "error":
level = h.Opts.ErrorLevelColor.Sprint(lvl)
case "fatal", "panic":
level = h.Opts.FatalLevelColor.Sprint(lvl)
default:
level = h.Opts.UnknownLevelColor.Sprint(lvl)
}
var timeColor *color.Color
if h.Opts.LightBg {
timeColor = h.Opts.TimeLightBgColor
} else {
timeColor = h.Opts.TimeDarkBgColor
}
_, _ = fmt.Fprintf(h.out, "%s |%s| %s\t %s",
timeColor.Sprint(h.Time.Format(h.Opts.TimeFormat)),
level,
msg,
strings.Join(h.joinKVs(skipUnchanged, "="), "\t "),
)
_ = h.out.Flush()
return h.buf.Bytes()
}
func (h *JSONHandler) joinKVs(skipUnchanged bool, sep string) []string {
kv := make([]string, 0, len(h.Fields))
for k, v := range h.Fields {
if !h.Opts.shouldShowKey(k) {
continue
}
if skipUnchanged {
if lastV, ok := h.last[k]; ok && lastV == v && !h.Opts.shouldShowUnchanged(k) {
continue
}
}
kstr := h.Opts.KeyColor.Sprint(k)
var vstr string
if h.Opts.Truncates && len(v) > h.Opts.TruncateLength {
vstr = v[:h.Opts.TruncateLength] + "..."
} else {
vstr = v
}
vstr = h.Opts.ValColor.Sprint(vstr)
kv = append(kv, kstr+sep+vstr)
}
sort.Strings(kv)
if h.Opts.SortLongest {
sort.Stable(byLongest(kv))
}
return kv
}
// convertBunyanLogLevel returns a human readable log level given a numerical bunyan level
// https://github.com/trentm/node-bunyan#levels
func convertBunyanLogLevel(level float64) string {
switch level {
case 10:
return "trace"
case 20:
return "debug"
case 30:
return "info"
case 40:
return "warn"
case 50:
return "error"
case 60:
return "fatal"
default:
return "???"
}
}

239
vendor/github.com/aybabtme/humanlog/logfmt_handler.go generated vendored Normal file
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package humanlog
import (
"bytes"
"fmt"
"sort"
"strconv"
"strings"
"text/tabwriter"
"time"
"github.com/fatih/color"
"github.com/go-logfmt/logfmt"
)
// LogfmtHandler can handle logs emmited by logrus.TextFormatter loggers.
type LogfmtHandler struct {
buf *bytes.Buffer
out *tabwriter.Writer
truncKV int
Opts *HandlerOptions
Level string
Time time.Time
Message string
Fields map[string]string
last map[string]string
}
func (h *LogfmtHandler) clear() {
h.Level = ""
h.Time = time.Time{}
h.Message = ""
h.last = h.Fields
h.Fields = make(map[string]string)
if h.buf != nil {
h.buf.Reset()
}
}
// CanHandle tells if this line can be handled by this handler.
func (h *LogfmtHandler) TryHandle(d []byte) bool {
if !bytes.ContainsRune(d, '=') {
return false
}
if !h.UnmarshalLogfmt(d) {
h.clear()
return false
}
return true
}
// HandleLogfmt sets the fields of the handler.
func (h *LogfmtHandler) UnmarshalLogfmt(data []byte) bool {
dec := logfmt.NewDecoder(bytes.NewReader(data))
for dec.ScanRecord() {
next_kv:
for dec.ScanKeyval() {
key := dec.Key()
val := dec.Value()
if h.Time.IsZero() {
foundTime := checkEachUntilFound(supportedTimeFields, func(field string) bool {
time, ok := tryParseTime(string(val))
if ok {
h.Time = time
}
return ok
})
if foundTime {
continue next_kv
}
}
if len(h.Message) == 0 {
foundMessage := checkEachUntilFound(supportedMessageFields, func(field string) bool {
if !bytes.Equal(key, []byte(field)) {
return false
}
h.Message = string(val)
return true
})
if foundMessage {
continue next_kv
}
}
if len(h.Level) == 0 {
foundLevel := checkEachUntilFound(supportedLevelFields, func(field string) bool {
if !bytes.Equal(key, []byte(field)) {
return false
}
h.Level = string(val)
return true
})
if foundLevel {
continue next_kv
}
}
h.setField(key, val)
}
}
return dec.Err() == nil
}
// Prettify the output in a logrus like fashion.
func (h *LogfmtHandler) Prettify(skipUnchanged bool) []byte {
defer h.clear()
if h.out == nil {
if h.Opts == nil {
h.Opts = DefaultOptions
}
h.buf = bytes.NewBuffer(nil)
h.out = tabwriter.NewWriter(h.buf, 0, 1, 0, '\t', 0)
}
var (
msgColor *color.Color
msgAbsentColor *color.Color
)
if h.Opts.LightBg {
msgColor = h.Opts.MsgLightBgColor
msgAbsentColor = h.Opts.MsgAbsentLightBgColor
} else {
msgColor = h.Opts.MsgDarkBgColor
msgAbsentColor = h.Opts.MsgAbsentDarkBgColor
}
var msg string
if h.Message == "" {
msg = msgAbsentColor.Sprint("<no msg>")
} else {
msg = msgColor.Sprint(h.Message)
}
lvl := strings.ToUpper(h.Level)[:imin(4, len(h.Level))]
var level string
switch h.Level {
case "debug":
level = h.Opts.DebugLevelColor.Sprint(lvl)
case "info":
level = h.Opts.InfoLevelColor.Sprint(lvl)
case "warn", "warning":
level = h.Opts.WarnLevelColor.Sprint(lvl)
case "error":
level = h.Opts.ErrorLevelColor.Sprint(lvl)
case "fatal", "panic":
level = h.Opts.FatalLevelColor.Sprint(lvl)
default:
level = h.Opts.UnknownLevelColor.Sprint(lvl)
}
var timeColor *color.Color
if h.Opts.LightBg {
timeColor = h.Opts.TimeLightBgColor
} else {
timeColor = h.Opts.TimeDarkBgColor
}
_, _ = fmt.Fprintf(h.out, "%s |%s| %s\t %s",
timeColor.Sprint(h.Time.Format(h.Opts.TimeFormat)),
level,
msg,
strings.Join(h.joinKVs(skipUnchanged, "="), "\t "),
)
_ = h.out.Flush()
return h.buf.Bytes()
}
func (h *LogfmtHandler) setLevel(val []byte) { h.Level = string(val) }
func (h *LogfmtHandler) setMessage(val []byte) { h.Message = string(val) }
func (h *LogfmtHandler) setTime(val []byte) (parsed bool) {
valStr := string(val)
if valFloat, err := strconv.ParseFloat(valStr, 64); err == nil {
h.Time, parsed = tryParseTime(valFloat)
} else {
h.Time, parsed = tryParseTime(string(val))
}
return
}
func (h *LogfmtHandler) setField(key, val []byte) {
if h.Fields == nil {
h.Fields = make(map[string]string)
}
h.Fields[string(key)] = string(val)
}
func (h *LogfmtHandler) joinKVs(skipUnchanged bool, sep string) []string {
kv := make([]string, 0, len(h.Fields))
for k, v := range h.Fields {
if !h.Opts.shouldShowKey(k) {
continue
}
if skipUnchanged {
if lastV, ok := h.last[k]; ok && lastV == v && !h.Opts.shouldShowUnchanged(k) {
continue
}
}
kstr := h.Opts.KeyColor.Sprint(k)
var vstr string
if h.Opts.Truncates && len(v) > h.Opts.TruncateLength {
vstr = v[:h.Opts.TruncateLength] + "..."
} else {
vstr = v
}
vstr = h.Opts.ValColor.Sprint(vstr)
kv = append(kv, kstr+sep+vstr)
}
sort.Strings(kv)
if h.Opts.SortLongest {
sort.Stable(byLongest(kv))
}
return kv
}
type byLongest []string
func (s byLongest) Len() int { return len(s) }
func (s byLongest) Less(i, j int) bool { return len(s[i]) < len(s[j]) }
func (s byLongest) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
func imin(a, b int) int {
if a < b {
return a
}
return b
}

68
vendor/github.com/aybabtme/humanlog/scanner.go generated vendored Normal file
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@@ -0,0 +1,68 @@
package humanlog
import (
"bufio"
"bytes"
"io"
)
var (
eol = [...]byte{'\n'}
)
// Scanner reads logfmt'd lines from src and prettify them onto dst.
// If the lines aren't logfmt, it will simply write them out with no
// prettification.
func Scanner(src io.Reader, dst io.Writer, opts *HandlerOptions) error {
in := bufio.NewScanner(src)
in.Split(bufio.ScanLines)
var line uint64
var lastLogfmt bool
var lastJSON bool
logfmtEntry := LogfmtHandler{Opts: opts}
jsonEntry := JSONHandler{Opts: opts}
for in.Scan() {
line++
lineData := in.Bytes()
// remove that pesky syslog crap
lineData = bytes.TrimPrefix(lineData, []byte("@cee: "))
switch {
case jsonEntry.TryHandle(lineData):
dst.Write(jsonEntry.Prettify(opts.SkipUnchanged && lastJSON))
lastJSON = true
case logfmtEntry.TryHandle(lineData):
dst.Write(logfmtEntry.Prettify(opts.SkipUnchanged && lastLogfmt))
lastLogfmt = true
case tryDockerComposePrefix(lineData, &jsonEntry):
dst.Write(jsonEntry.Prettify(opts.SkipUnchanged && lastJSON))
lastJSON = true
case tryDockerComposePrefix(lineData, &logfmtEntry):
dst.Write(logfmtEntry.Prettify(opts.SkipUnchanged && lastLogfmt))
lastLogfmt = true
default:
lastLogfmt = false
lastJSON = false
dst.Write(lineData)
}
dst.Write(eol[:])
}
switch err := in.Err(); err {
case nil, io.EOF:
return nil
default:
return err
}
}

66
vendor/github.com/aybabtme/humanlog/time_parse.go generated vendored Normal file
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@@ -0,0 +1,66 @@
package humanlog
import (
"time"
)
var formats = []string{
"2006-01-02 15:04:05.999999999 -0700 MST",
"2006-01-02 15:04:05",
time.RFC3339,
time.RFC3339Nano,
time.RFC822,
time.RFC822Z,
time.RFC850,
time.RFC1123,
time.RFC1123Z,
time.UnixDate,
time.RubyDate,
time.ANSIC,
time.Kitchen,
time.Stamp,
time.StampMilli,
time.StampMicro,
time.StampNano,
}
func parseTimeFloat64(value float64) time.Time {
v := int64(value)
switch {
case v > 1e18:
case v > 1e15:
v *= 1e3
case v > 1e12:
v *= 1e6
default:
return time.Unix(v, 0)
}
return time.Unix(v/1e9, v%1e9)
}
// tries to parse time using a couple of formats before giving up
func tryParseTime(value interface{}) (time.Time, bool) {
var t time.Time
var err error
switch value.(type) {
case string:
for _, layout := range formats {
t, err = time.Parse(layout, value.(string))
if err == nil {
return t, true
}
}
case float32:
return parseTimeFloat64(float64(value.(float32))), true
case float64:
return parseTimeFloat64(value.(float64)), true
case int:
return parseTimeFloat64(float64(value.(int))), true
case int32:
return parseTimeFloat64(float64(value.(int32))), true
case int64:
return parseTimeFloat64(float64(value.(int64))), true
}
return t, false
}