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credentials.go
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credentials.go
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package sls
import (
"time"
)
type Credentials struct {
AccessKeyID string
AccessKeySecret string
SecurityToken string
}
const DEFAULT_EXPIRED_FACTOR = 0.8
// Expirable credentials with an expiration.
type TempCredentials struct {
Credentials
expiredFactor float64
expirationInMills int64 // The time when the credentials expires, unix timestamp in millis
lastUpdatedInMills int64
}
func NewTempCredentials(accessKeyId, accessKeySecret, securityToken string,
expirationInMills, lastUpdatedInMills int64) *TempCredentials {
return &TempCredentials{
Credentials: Credentials{
AccessKeyID: accessKeyId,
AccessKeySecret: accessKeySecret,
SecurityToken: securityToken,
},
expirationInMills: expirationInMills,
lastUpdatedInMills: lastUpdatedInMills,
expiredFactor: DEFAULT_EXPIRED_FACTOR,
}
}
// @param factor must > 0.0 and <= 1.0, the less the factor is,
// the more frequently the credentials will be updated.
//
// If factor is set to 0, the credentials will be fetched every time
// [GetCredentials] is called.
//
// If factor is set to 1, the credentials will be fetched only when expired .
func (t *TempCredentials) WithExpiredFactor(factor float64) *TempCredentials {
if factor > 0.0 && factor <= 1.0 {
t.expiredFactor = factor
}
return t
}
// Returns true if credentials has expired already or will expire soon.
func (t *TempCredentials) ShouldRefresh() bool {
nowInMills := time.Now().UnixNano() / 1e6
if nowInMills >= t.expirationInMills {
return true
}
duration := (float64)(t.expirationInMills-t.lastUpdatedInMills) * t.expiredFactor
if duration < 0.0 { // check here
duration = 0
}
return (nowInMills - t.lastUpdatedInMills) >= int64(duration)
}
// Returns true if credentials has expired already.
func (t *TempCredentials) HasExpired() bool {
nowInMills := time.Now().UnixNano() / 1e6
return nowInMills >= t.expirationInMills
}