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gitea/vendor/github.com/hashicorp/go-retryablehttp/roundtripper.go

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package retryablehttp
import (
"net/http"
"sync"
)
// RoundTripper implements the http.RoundTripper interface, using a retrying
// HTTP client to execute requests.
//
// It is important to note that retryablehttp doesn't always act exactly as a
// RoundTripper should. This is highly dependent on the retryable client's
// configuration.
type RoundTripper struct {
// The client to use during requests. If nil, the default retryablehttp
// client and settings will be used.
Client *Client
// once ensures that the logic to initialize the default client runs at
// most once, in a single thread.
once sync.Once
}
// init initializes the underlying retryable client.
func (rt *RoundTripper) init() {
if rt.Client == nil {
rt.Client = NewClient()
}
}
// RoundTrip satisfies the http.RoundTripper interface.
func (rt *RoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
rt.once.Do(rt.init)
// Convert the request to be retryable.
retryableReq, err := FromRequest(req)
if err != nil {
return nil, err
}
// Execute the request.
return rt.Client.Do(retryableReq)
}