go-omaha/omaha/client/error.go

73 lines
1.7 KiB
Go

// Copyright 2017 CoreOS, Inc.
//
// 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 client
import (
"encoding/xml"
"errors"
"io"
"net/http"
)
var (
bodySizeError = errors.New("http response exceeded 1MB")
bodyEmptyError = errors.New("http response was empty")
)
// xml doesn't return the standard io.ErrUnexpectedEOF so check for both.
func isUnexpectedEOF(err error) bool {
if xerr, ok := err.(*xml.SyntaxError); ok {
return xerr.Msg == "unexpected EOF"
}
return err == io.ErrUnexpectedEOF
}
// httpError implements error and net.Error for http responses.
type httpError struct {
*http.Response
}
func (he *httpError) Error() string {
return "http error: " + he.Status
}
func (he *httpError) Timeout() bool {
switch he.StatusCode {
case http.StatusRequestTimeout: // 408
return true
case http.StatusGatewayTimeout: // 504
return true
default:
return false
}
}
func (he *httpError) Temporary() bool {
if he.Timeout() {
return true
}
switch he.StatusCode {
case http.StatusTooManyRequests: // 429
return true
case http.StatusInternalServerError: // 500
return true
case http.StatusBadGateway: // 502
return true
case http.StatusServiceUnavailable: // 503
return true
default:
return false
}
}