peridot/vendor/github.com/aws/aws-sdk-go/private/protocol/timestamp.go

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2022-07-07 20:11:50 +00:00
package protocol
import (
"math"
"strconv"
"time"
"github.com/aws/aws-sdk-go/internal/sdkmath"
)
// Names of time formats supported by the SDK
const (
RFC822TimeFormatName = "rfc822"
ISO8601TimeFormatName = "iso8601"
UnixTimeFormatName = "unixTimestamp"
)
// Time formats supported by the SDK
// Output time is intended to not contain decimals
const (
// RFC 7231#section-7.1.1.1 timetamp format. e.g Tue, 29 Apr 2014 18:30:38 GMT
RFC822TimeFormat = "Mon, 2 Jan 2006 15:04:05 GMT"
// This format is used for output time without seconds precision
RFC822OutputTimeFormat = "Mon, 02 Jan 2006 15:04:05 GMT"
// RFC3339 a subset of the ISO8601 timestamp format. e.g 2014-04-29T18:30:38Z
ISO8601TimeFormat = "2006-01-02T15:04:05.999999999Z"
// This format is used for output time with fractional second precision up to milliseconds
ISO8601OutputTimeFormat = "2006-01-02T15:04:05.999999999Z"
)
// IsKnownTimestampFormat returns if the timestamp format name
// is know to the SDK's protocols.
func IsKnownTimestampFormat(name string) bool {
switch name {
case RFC822TimeFormatName:
fallthrough
case ISO8601TimeFormatName:
fallthrough
case UnixTimeFormatName:
return true
default:
return false
}
}
// FormatTime returns a string value of the time.
func FormatTime(name string, t time.Time) string {
t = t.UTC().Truncate(time.Millisecond)
switch name {
case RFC822TimeFormatName:
return t.Format(RFC822OutputTimeFormat)
case ISO8601TimeFormatName:
return t.Format(ISO8601OutputTimeFormat)
case UnixTimeFormatName:
ms := t.UnixNano() / int64(time.Millisecond)
return strconv.FormatFloat(float64(ms)/1e3, 'f', -1, 64)
default:
panic("unknown timestamp format name, " + name)
}
}
// ParseTime attempts to parse the time given the format. Returns
// the time if it was able to be parsed, and fails otherwise.
func ParseTime(formatName, value string) (time.Time, error) {
switch formatName {
case RFC822TimeFormatName:
return time.Parse(RFC822TimeFormat, value)
case ISO8601TimeFormatName:
return time.Parse(ISO8601TimeFormat, value)
case UnixTimeFormatName:
v, err := strconv.ParseFloat(value, 64)
_, dec := math.Modf(v)
dec = sdkmath.Round(dec*1e3) / 1e3 //Rounds 0.1229999 to 0.123
if err != nil {
return time.Time{}, err
}
return time.Unix(int64(v), int64(dec*(1e9))), nil
default:
panic("unknown timestamp format name, " + formatName)
}
}