mirror of
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71 lines
1.5 KiB
Go
71 lines
1.5 KiB
Go
// Copyright 2016 Iron.io
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package common
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import (
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"io"
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"net"
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"syscall"
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)
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// Errors that can be directly exposed to task creators/users.
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type UserVisibleError interface {
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UserVisible() bool
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}
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func IsUserVisibleError(err error) bool {
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ue, ok := err.(UserVisibleError)
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return ok && ue.UserVisible()
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}
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type userVisibleError struct {
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error
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}
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func (u *userVisibleError) UserVisible() bool { return true }
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func UserError(err error) error {
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return &userVisibleError{err}
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}
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type Temporary interface {
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Temporary() bool
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}
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func IsTemporary(err error) bool {
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v, ok := err.(Temporary)
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return (ok && v.Temporary()) || isNet(err)
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}
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func isNet(err error) bool {
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if _, ok := err.(net.Error); ok {
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return true
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}
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switch err := err.(type) {
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case *net.OpError:
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return true
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case syscall.Errno:
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if err == syscall.ECONNREFUSED { // linux only? maybe ok for prod
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return true // connection refused
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}
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default:
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if err == io.ErrUnexpectedEOF || err == io.EOF {
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return true
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}
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}
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return false
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}
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