vendor/cloud.google.com/go/storage/not_go110.go

   1 // Copyright 2017 Google LLC
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //      http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 // +build !go1.10
  16
  17 package storage
  18
  19 import (
  20         "net/url"
  21         "strings"
  22
  23         "google.golang.org/api/googleapi"
  24 )
  25
  26 func shouldRetry(err error) bool {
  27         switch e := err.(type) {
  28         case *googleapi.Error:
  29                 // Retry on 429 and 5xx, according to
  30                 // https://cloud.google.com/storage/docs/exponential-backoff.
  31                 return e.Code == 429 || (e.Code >= 500 && e.Code < 600)
  32         case *url.Error:
  33                 // Retry on REFUSED_STREAM.
  34                 // Unfortunately the error type is unexported, so we resort to string
  35                 // matching.
  36                 return strings.Contains(e.Error(), "REFUSED_STREAM")
  37         case interface{ Temporary() bool }:
  38                 return e.Temporary()
  39         default:
  40                 return false
  41         }
  42 }