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Diffstat (limited to 'vendor/cloud.google.com/go/compute/metadata/retry.go')
-rw-r--r--vendor/cloud.google.com/go/compute/metadata/retry.go114
1 files changed, 0 insertions, 114 deletions
diff --git a/vendor/cloud.google.com/go/compute/metadata/retry.go b/vendor/cloud.google.com/go/compute/metadata/retry.go
deleted file mode 100644
index 0f18f3c..0000000
--- a/vendor/cloud.google.com/go/compute/metadata/retry.go
+++ /dev/null
@@ -1,114 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// 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 metadata
-
-import (
- "context"
- "io"
- "math/rand"
- "net/http"
- "time"
-)
-
-const (
- maxRetryAttempts = 5
-)
-
-var (
- syscallRetryable = func(err error) bool { return false }
-)
-
-// defaultBackoff is basically equivalent to gax.Backoff without the need for
-// the dependency.
-type defaultBackoff struct {
- max time.Duration
- mul float64
- cur time.Duration
-}
-
-func (b *defaultBackoff) Pause() time.Duration {
- d := time.Duration(1 + rand.Int63n(int64(b.cur)))
- b.cur = time.Duration(float64(b.cur) * b.mul)
- if b.cur > b.max {
- b.cur = b.max
- }
- return d
-}
-
-// sleep is the equivalent of gax.Sleep without the need for the dependency.
-func sleep(ctx context.Context, d time.Duration) error {
- t := time.NewTimer(d)
- select {
- case <-ctx.Done():
- t.Stop()
- return ctx.Err()
- case <-t.C:
- return nil
- }
-}
-
-func newRetryer() *metadataRetryer {
- return &metadataRetryer{bo: &defaultBackoff{
- cur: 100 * time.Millisecond,
- max: 30 * time.Second,
- mul: 2,
- }}
-}
-
-type backoff interface {
- Pause() time.Duration
-}
-
-type metadataRetryer struct {
- bo backoff
- attempts int
-}
-
-func (r *metadataRetryer) Retry(status int, err error) (time.Duration, bool) {
- if status == http.StatusOK {
- return 0, false
- }
- retryOk := shouldRetry(status, err)
- if !retryOk {
- return 0, false
- }
- if r.attempts == maxRetryAttempts {
- return 0, false
- }
- r.attempts++
- return r.bo.Pause(), true
-}
-
-func shouldRetry(status int, err error) bool {
- if 500 <= status && status <= 599 {
- return true
- }
- if err == io.ErrUnexpectedEOF {
- return true
- }
- // Transient network errors should be retried.
- if syscallRetryable(err) {
- return true
- }
- if err, ok := err.(interface{ Temporary() bool }); ok {
- if err.Temporary() {
- return true
- }
- }
- if err, ok := err.(interface{ Unwrap() error }); ok {
- return shouldRetry(status, err.Unwrap())
- }
- return false
-}