Source: go110.go in package cloud.google.com/go/storage

Copyright 2017 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.

+build go1.10


package storage

import (
	"net/url"
	"strings"

	"google.golang.org/api/googleapi"
)

func shouldRetry(err error) bool {
	switch e := err.(type) {

Retry on 429 and 5xx, according to https://cloud.google.com/storage/docs/exponential-backoff.

		return e.Code == 429 || (e.Code >= 500 && e.Code < 600)

Retry socket-level errors ECONNREFUSED and ENETUNREACH (from syscall). Unfortunately the error type is unexported, so we resort to string matching.

		retriable := []string{"connection refused", "connection reset"}
		for _, s := range retriable {
			if strings.Contains(e.Error(), s) {
				return true
			}
		}
		return false
	case interface{ Temporary() bool }:
		return e.Temporary()
	default:
		return false
	}