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//go:build go1.8
// +build go1.8
// Copyright 2017 Microsoft Corporation
//
// 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 autorest
import (
"bytes"
"io"
"io/ioutil"
"net/http"
)
// RetriableRequest provides facilities for retrying an HTTP request.
type RetriableRequest struct {
req *http.Request
rc io.ReadCloser
br *bytes.Reader
}
// Prepare signals that the request is about to be sent.
func (rr *RetriableRequest) Prepare() (err error) {
// preserve the request body; this is to support retry logic as
// the underlying transport will always close the reqeust body
if rr.req.Body != nil {
if rr.rc != nil {
rr.req.Body = rr.rc
} else if rr.br != nil {
_, err = rr.br.Seek(0, io.SeekStart)
rr.req.Body = ioutil.NopCloser(rr.br)
}
if err != nil {
return err
}
if rr.req.GetBody != nil {
// this will allow us to preserve the body without having to
// make a copy. note we need to do this on each iteration
rr.rc, err = rr.req.GetBody()
if err != nil {
return err
}
} else if rr.br == nil {
// fall back to making a copy (only do this once)
err = rr.prepareFromByteReader()
}
}
return err
}
func removeRequestBody(req *http.Request) {
req.Body = nil
req.GetBody = nil
req.ContentLength = 0
}
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