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swift: work around token expiry on CEPH

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This implements the Expiry interface so token expiry works properly

This change makes sure that this change from the swift library works
correctly with rclone's custom authenticator.

> Renew the token 60s before the expiry time
>
> The v2 and v3 auth schemes both return the expiry time of the token,
> so instead of waiting for a 401 error, renew the token 60s before this
> time.
>
> This makes transfers more efficient and also works around a bug in
> CEPH which returns 403 instead of 401 when the token expires.
>
> http://tracker.ceph.com/issues/22223
This commit is contained in:
Nick Craig-Wood 2019-03-17 17:37:54 +00:00
parent 595fea757d
commit 6e70d88f54
1 changed files with 13 additions and 1 deletions
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14
backend/swift/auth.go
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@ -2,6 +2,7 @@ package swift
import (
"net/http"
"time"
"github.com/ncw/swift"
)
@ -65,6 +66,14 @@ func (a *auth) Token() string {
return a.parentAuth.Token()
}
// Expires returns the time the token expires if known or Zero if not.
func (a *auth) Expires() (t time.Time) {
if do, ok := a.parentAuth.(swift.Expireser); ok {
t = do.Expires()
}
return t
}
// The CDN url if available
func (a *auth) CdnUrl() string { // nolint
if a.parentAuth == nil {
@ -74,4 +83,7 @@ func (a *auth) CdnUrl() string { // nolint
}
// Check the interfaces are satisfied
var _ swift.Authenticator = (*auth)(nil)
var (
_ swift.Authenticator = (*auth)(nil)
_ swift.Expireser = (*auth)(nil)
)