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