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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 | } |