56 lines
1.2 KiB
Go
56 lines
1.2 KiB
Go
// +build go1.8
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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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"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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reset bool
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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.reset {
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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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}
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rr.reset = false
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if err != nil {
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return err
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}
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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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// indicates that the request body needs to be reset
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rr.reset = true
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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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