5
// Default key names for the default fields
7
defaultTimestampFormat = time.RFC3339
9
FieldKeyLevel = "level"
11
FieldKeyLogrusError = "logrus_error"
16
// The Formatter interface is used to implement a custom Formatter. It takes an
17
// `Entry`. It exposes all the fields, including the default ones:
19
// * `entry.Data["msg"]`. The message passed from Info, Warn, Error ..
20
// * `entry.Data["time"]`. The timestamp.
21
// * `entry.Data["level"]. The level the entry was logged at.
23
// Any additional fields added with `WithField` or `WithFields` are also in
24
// `entry.Data`. Format is expected to return an array of bytes which are then
25
// logged to `logger.Out`.
26
type Formatter interface {
27
Format(*Entry) ([]byte, error)
30
// This is to not silently overwrite `time`, `msg`, `func` and `level` fields when
31
// dumping it. If this code wasn't there doing:
33
// logrus.WithField("level", 1).Info("hello")
35
// Would just silently drop the user provided level. Instead with this code
38
// {"level": "info", "fields.level": 1, "msg": "hello", "time": "..."}
40
// It's not exported because it's still using Data in an opinionated way. It's to
41
// avoid code duplication between the two default formatters.
42
func prefixFieldClashes(data Fields, fieldMap FieldMap, reportCaller bool) {
43
timeKey := fieldMap.resolve(FieldKeyTime)
44
if t, ok := data[timeKey]; ok {
45
data["fields."+timeKey] = t
49
msgKey := fieldMap.resolve(FieldKeyMsg)
50
if m, ok := data[msgKey]; ok {
51
data["fields."+msgKey] = m
55
levelKey := fieldMap.resolve(FieldKeyLevel)
56
if l, ok := data[levelKey]; ok {
57
data["fields."+levelKey] = l
58
delete(data, levelKey)
61
logrusErrKey := fieldMap.resolve(FieldKeyLogrusError)
62
if l, ok := data[logrusErrKey]; ok {
63
data["fields."+logrusErrKey] = l
64
delete(data, logrusErrKey)
67
// If reportCaller is not set, 'func' will not conflict.
69
funcKey := fieldMap.resolve(FieldKeyFunc)
70
if l, ok := data[funcKey]; ok {
71
data["fields."+funcKey] = l
73
fileKey := fieldMap.resolve(FieldKeyFile)
74
if l, ok := data[fileKey]; ok {
75
data["fields."+fileKey] = l