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refreshable.go
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refreshable.go
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/*
* Copyright 2022 Armory, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package token
import (
"context"
"time"
)
func newRefreshableTokenCredentials(getter tokenGetter, expLeewaySec int64) *refreshableTokenCredentials {
return &refreshableTokenCredentials{
getter: getter,
expLeewaySec: expLeewaySec,
}
}
type refreshableTokenCredentials struct {
token string
exp *time.Time
getter tokenGetter
expLeewaySec int64
}
func (r *refreshableTokenCredentials) RequireTransportSecurity() bool {
return true
}
func (r *refreshableTokenCredentials) GetRequestMetadata(ctx context.Context, uri string) (map[string]string, error) {
// if never expired or if the expiration is before now + leeway
if r.exp == nil || r.exp.Before(time.Now().Add(time.Duration(r.expLeewaySec)*time.Second)) {
var err error
r.token, r.exp, err = r.getter.GetToken(ctx)
if err != nil {
return nil, err
}
}
return map[string]string{
"authorization": "Bearer " + r.token,
}, nil
}