telegraf/plugins/inputs/dcos/creds.go

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2017-11-29 19:50:32 +00:00
package dcos
import (
"context"
"crypto/rsa"
"fmt"
"io/ioutil"
"strings"
"time"
"unicode/utf8"
)
const (
// How long before expiration to renew token
relogDuration = 5 * time.Minute
)
type Credentials interface {
Token(ctx context.Context, client Client) (string, error)
IsExpired() bool
}
type ServiceAccount struct {
AccountID string
PrivateKey *rsa.PrivateKey
auth *AuthToken
}
type TokenCreds struct {
Path string
}
type NullCreds struct {
}
func (c *ServiceAccount) Token(ctx context.Context, client Client) (string, error) {
auth, err := client.Login(ctx, c)
if err != nil {
return "", err
}
c.auth = auth
return auth.Text, nil
}
func (c *ServiceAccount) IsExpired() bool {
return c.auth.Text != "" || c.auth.Expire.Add(relogDuration).After(time.Now())
}
func (c *TokenCreds) Token(ctx context.Context, client Client) (string, error) {
octets, err := ioutil.ReadFile(c.Path)
if err != nil {
return "", fmt.Errorf("Error reading token file %q: %s", c.Path, err)
}
if !utf8.Valid(octets) {
return "", fmt.Errorf("Token file does not contain utf-8 encoded text: %s", c.Path)
}
token := strings.TrimSpace(string(octets))
return token, nil
}
func (c *TokenCreds) IsExpired() bool {
return true
}
func (c *NullCreds) Token(ctx context.Context, client Client) (string, error) {
return "", nil
}
func (c *NullCreds) IsExpired() bool {
return true
}